X-Sender: bayns at mail.broad.net.au X-Mailer: Windows Eudora Light Version 3.0.1 (32) Date: Tue, 17 Oct 2000 00:21:01 +1000 To: aussie-weather at world.std.com From: steve baynham Subject: aus-wx: gold coast storm Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com moirning all what ripper night we had here. another beauty developed south of the border ranges and headed ENE with the coolangatta region in its path. and i had the perfect view!!! i took a roll and a half over a 1.5 hr period. got plenty of CG's on film, but also missed the plenty or pearlers aswell:( ya get that thunder and lightning still going now 12:15 am EST. most photos were taken from the roof and rain interupted play. i'm about 10km north of coolangatta and the storm was red on radar for about half an hour. will get photos\ back asap Steve Baynham http://www.angelfire.com/ok/gany Australian Severe Weather Association http://www.severeweather.asn.au Brisbane Storm Chasers http://www.bsch.simplenet.com +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Originating-IP: [203.134.132.176] From: "Ben Jerrems" To: aussie-weather at world.std.com Subject: Re: aus-wx: 4 new one's. Date: Tue, 17 Oct 2000 00:43:27 EST X-OriginalArrivalTime: 16 Oct 2000 14:43:27.0662 (UTC) FILETIME=[71D654E0:01C0377F] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi everyone? Just uploaded 4 slides that i thought i had lost. They start from supercell onwards. http://communities.ninemsn.com.au/Beanzvision Ben-(MSC) _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Marguerite Long" To: Subject: Re: aus-wx: gold coast storm Date: Tue, 17 Oct 2000 01:03:52 +1000 X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Steve, From the Gap area of Brisbane North have been watching ?pulsating? lightning since 8.45pm. It is now 1am. I don't know the correct terminology, but this has been constant. I am wondering why the lightning tracker only shows a few strikes when what I have been watching is akin to a continuous sort of pulse beat. Marguerite . ----- Original Message ----- From: steve baynham To: Sent: Tuesday, October 17, 2000 12:21 AM Subject: aus-wx: gold coast storm > moirning all > what ripper night we had here. another beauty developed south of the border > ranges and headed ENE with the coolangatta region in its path. and i had > the perfect view!!! > i took a roll and a half over a 1.5 hr period. got plenty of CG's on film, > but also missed the plenty or pearlers aswell:( ya get that > thunder and lightning still going now 12:15 am EST. most photos were taken > from the roof and rain interupted play. i'm about 10km north of coolangatta > and the storm was red on radar for about half an hour. > will get photos\ back asap > > Steve Baynham > http://www.angelfire.com/ok/gany > > Australian Severe Weather Association > http://www.severeweather.asn.au > > Brisbane Storm Chasers > http://www.bsch.simplenet.com > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "John Woodbridge" To: Subject: RE: aus-wx: gold coast storm Date: Tue, 17 Oct 2000 01:00:03 +1000 X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2911.0) Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Marguerite, The lightning tracker only shows Cloud-Ground strikes (CG's), and much of what you can see are cloud-cloud (CC's - not chips :)), which it doesn't record. I also can see the activity from Mt. Crosby. Regards, John. >snip Hi Steve, >From the Gap area of Brisbane North have been watching ?pulsating? lightning since 8.45pm. It is now 1am. I don't know the correct terminology, but this has been constant. I am wondering why the lightning tracker only shows a few strikes when what I have been watching is akin to a continuous sort of pulse beat. Marguerite +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Tue, 17 Oct 2000 01:34:49 +1000 From: Anthony Cornelius X-Mailer: Mozilla 4.72 [en] (Win98; I) X-Accept-Language: en To: Australian Weather Mailing List Subject: aus-wx: Gold Coast Storm Chase Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi all, As usual I potter around whereever the storms are :) I left around 11pm, and headed down the GC where I got the northern edge of the line of thunderstorms that moved off the ranges and onto the Gold Coast. It was a fantastic thunderstorm!!!!!!! Probably locally severe, I had winds of at least 70km/h - torrential rain, gutters were overflowing all over the road! And I witnessed a few nice CJ's, including one that blacked out the area for 20seconds or so! Towards the end it got quite strong, bordering on severe - and got called insane at BP for being out there! And the guy argued with me to get inside, and I finally listened when the underneath of the servo shelter roof started lifting!!! (It's not nailed though, it's just loose I think). But it didn't last for long after that. I'll get a report up soon...and fight with my capture card (although most of it is just lightning, and rain/trees being blown by winds!) Well...it's 1:35am and I have to get up at 6... -- Anthony Cornelius Queensland Coordinator of the Australian Severe Weather Association (ASWA) (07) 3390 4812 14 Kinsella St Belmont, Brisbane QLD, 4153 Please report severe thunderstorms on our Queensland severe thunderstorm reporting line on (07) 3390 4218 or by going to our homepage at http://www.severeweather.asn.au +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: Harald Richter Subject: Re: aus-wx: Severe Reports 13 Oct 2000 To: aussie-weather at world.std.com (Australian Severe Weather Association) Date: Mon, 16 Oct 2000 14:28:00 -0500 (CDT) X-Mailer: ELM [version 2.5 PL3] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi there, Stormy Anthony provided: > Here's a cropped GMSD loop of the storms in NW QLD yesterday - quite > impressive!: > > http://www.bsch.simplenet.com/anthony/QLDLoop.gif Wow. I see completely linear initiation ahead of the main cloud band where the sun was shining nicely and brightly. The first cell goes up somewhere near Winton (QLD) and proceeds to grow into the the dominating MCS/MCC. My guess is that the ESE end of the convective line experienced the best upper-level flow. An interesting aside is that the entire line initiated along a very gentle ridge in the terrain that extends from Daly Waters (NT) to Mount Isa (QLD) to Winton (QLD). > In regards to Harald's question, the only two organisations that I know > of that collect reports are the BOM and ASWA! Blair, or David, who could I contact regarding possible SVR reports (maybe a good one for an offline reply)? > PS - you were't far off on your Charleville prediction, just a tad > further north - good work! The atmosphere was increasingly suggestive of "well into QLD", BUT I lacked the guts to call anything that far North. Its an interesting forecasting phenomenon - even when the atmosphere is ramming it down your throat, we are sometimes not prepared to call events well outside some mental target area. Cheers, Harald -- ------------------------------------------- Harald Richter NOAA/National Severe Storms Laboratory 1313 Halley Circle Norman, OK 73069, U.S.A. ph.: (405) 366-0430 fax: (405) 579-0808 email: hrichter at enterprise.nssl.noaa.gov web: http://www.nssl.noaa.gov/~hrichter ------------------------------------------- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "bussie" To: "weather list" Subject: aus-wx: Overnight Date: Tue, 17 Oct 2000 06:49:05 +1000 X-Mailer: Microsoft Outlook Express 5.50.4133.2400 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Don wrote: BOM forecasting -2 for Wangaratta, Bendigo and Seymour and even 5 for Melbourne - all low for mid October???? I got down to 2C with the humidity sitting on 92% at 6am. I see Wangaratta was 3C, humidity 97% at 5am. Think the record maybe safe (for now). Bussie (NE Victoria) +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "bussie" To: Subject: Re: aus-wx: Frost? Date: Tue, 17 Oct 2000 06:55:09 +1000 X-Mailer: Microsoft Outlook Express 5.50.4133.2400 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I agree fully with you on that one. But according to some of the things I've read it must be zero or below. Yesterday certainly looked like frost, but "officially" probably couldn't be classed as one. Bussy (NE Victoria) ----- Original Message ----- From: "Keith Barnett" To: Sent: Monday, October 16, 2000 8:24 PM Subject: Re: aus-wx: Frost? > I always record a frost if there is ice on the terrestrial minimum > thermometer, on dead grass clippings or the ground, or the car roof. > A frost is a frost, and if you see it I reckon it should be recorded as > such. The physics of frost formation/radiation etc are so complex we'd > never report anything if we stuck to the 'theory', which is often > contradicted by what is seen... > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "bussie" To: "weather list" Subject: aus-wx: That answers that Date: Tue, 17 Oct 2000 07:02:42 +1000 X-Mailer: Microsoft Outlook Express 5.50.4133.2400 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com The lightning tracker only shows Cloud-Ground strikes (CG's), and much of what you can see are cloud-cloud (CC's - not chips :)), which it doesn't record. I also can see the activity from Mt. Crosby. Always wondered what a lightning tracker showed. Now I know. Thanks for that. Here's the technical bit. How does it know it's a cloud to ground? Is it because it's gone to ground and therefore "earth's" and gets detected that way? Bussy (NE Victoria) Bussie (NE Victoria) +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Mon, 16 Oct 2000 19:35:07 +1100 From: Chas & Helen Osborn X-Mailer: Mozilla 4.61 [en] (Win98; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Snowing in Hobart Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Miguel de Salas wrote: > > > Just looked out the window five minutes ago, and would you believe it, it's > snowing!!! > > We haven't had any snow in Hobart all winter, and it decides to snow in > mid-october!!! :) > > It's turned to sleet now, but it was exciting for a while! > > Miguel, in Hobart, Tassie Hello Miguel On our way back to the west coast from Launceston yesterday, we drove through where there have been good falls of snow, on the Cradle Mountain link road. There were light showers of snow when we passed through at 2pm. It was an excellent trip, the roads were clear and the sun was out most of the way. This morning we have a heavy frost on the ground, in Strahan. Chas Strahan Tasmania +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: mbath at pop.ozemail.com.au X-Mailer: QUALCOMM Windows Eudora Version 5.0 Date: Tue, 17 Oct 2000 08:28:27 +1000 To: aussie-weather at world.std.com From: Michael Bath Subject: Re: aus-wx: Gold Coast Storm Chase Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com You are amazingly enthusiastic by your chasing Anthony! Well done to you, and Steve! The storm formed in NE NSW and gave quite a nice show from my location looking NW to the border ranges (actually I was laying in bed watching at first ). Around 11pm the full cumulonimbus structure was visible with each lightning flash, and it seemed to be quite a large system with pretty high tops. I have taken some time exposures so hopefully that structure will show as it was pretty awesome. CGs were occurring only about every 2-3 mins then died off from my viewing location around 11.30pm. regards, Michael At 01:34 17/10/2000 +1000, you wrote: >Hi all, > >As usual I potter around whereever the storms are :) I left around >11pm, and headed down the GC where I got the northern edge of the line >of thunderstorms that moved off the ranges and onto the Gold Coast. It >was a fantastic thunderstorm!!!!!!! Probably locally severe, I had >winds of at least 70km/h - torrential rain, gutters were overflowing all >over the road! And I witnessed a few nice CJ's, including one that >blacked out the area for 20seconds or so! Towards the end it got quite >strong, bordering on severe - and got called insane at BP for being out >there! And the guy argued with me to get inside, and I finally listened >when the underneath of the servo shelter roof started lifting!!! (It's >not nailed though, it's just loose I think). But it didn't last for >long after that. I'll get a report up soon...and fight with my capture >card (although most of it is just lightning, and rain/trees being blown >by winds!) > >Well...it's 1:35am and I have to get up at 6... >-- >Anthony Cornelius >Queensland Coordinator of the Australian Severe Weather Association >(ASWA) >(07) 3390 4812 >14 Kinsella St >Belmont, Brisbane >QLD, 4153 >Please report severe thunderstorms on our Queensland severe thunderstorm >reporting line on (07) 3390 4218 or by going to our homepage at >http://www.severeweather.asn.au > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ ============================================================= Michael Bath mailto:mbath at ozemail.com.au McLeans Ridges http://australiasevereweather.com/ NE NSW Australia http://www.lightningphotography.com/ ASWA Secretary http://www.severeweather.asn.au/ ============================================================= +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Adam Mayo" To: "Australian Severe Weather Mailing List" Subject: aus-wx: UK floods - more rain Date: Tue, 17 Oct 2000 08:34:46 +1000 X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi everyone, Just heard that Lewes Library in Sussex UK have suffered a lot of damage in their warehouse, all the oversized books and anything on the lower shelves are floating on the flood water contaminated with diesel and sewerage. Pity because some of those books are hundreds of years old. My cousin works there. Also the school where the family's children attend is full of mud from a mud slide which occurred in the midst of the huge downpour. Not due to reopen until at least the end of October. Lucky the rain came at night. Flood water was beginning to rise again at about 7.30 pm Monday AEST. Judy Mayo. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: skerans at mail.cth.com.au X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.5 (32) Date: Tue, 17 Oct 2000 06:46:38 +0000 To: From: Sel Kerans Subject: aus-wx: Video Request for TV show 'Real TV' Cc: ross.evans at bom.gov.au Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hello all, Some may be interested in this offer - I don't have anything to contribute. Please let me know and I can forward email contact information to you. I have a had a recent contact from someone from the television show REAL TV based in Los Angeles, USA. They are looking for extreme weather video clips for the program and are looking for Australian input. Do you have video of extreme weather? They are prepared to pay for what you have - might as well get some money to support your chases... Cheers, Sel. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Sel Kerans Coordinator \|/ &&&&& Project Atmosphere Australia On-line -0- .--_|\ "/" WWW: http://www.schools.ash.org.au/paa /|\ / \ \ Email: skerans at mail.cth.com.au \_.--\_/ EQ: sel.kerans at qed.qld.gov.au v ph 07 3881 9623 fax 07 3881 9640 *** Now taking registrations from schools around the world *** *** On-line activities scheduled for March, April, May 2000 *** ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "David Findlay" To: Subject: RE: aus-wx: That answers that Date: Tue, 17 Oct 2000 08:02:27 +1000 X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com >The lightning tracker only shows Cloud-Ground strikes (CG's), and much of >what you can see are cloud-cloud (CC's - not chips :)), which it doesn't >record. I also can see the activity from Mt. Crosby. >Always wondered what a lightning tracker showed. Now I know. Thanks for >that. Here's the technical bit. How does it know it's a cloud to ground? Is >it because it's gone to ground and therefore "earth's" and gets detected >that way? Maybe the one that they are using only shows CG's. But the design which I am going to build as soon as I manage to get the time will be capable of detecting both. It will just require more software changes. The current software used by the uni that runs the one in the US only detects CG's, but the professor there told me that with extra software I could detect both. David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: David Jones To: "Aussie Weather Digest (E-mail)" Subject: aus-wx: aussie frost... Date: Tue, 17 Oct 2000 09:23:59 +1000 X-Mailer: Internet Mail Service (5.5.2650.21) Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com In Aus. my understanding is that a screen level minimum of 36F or 2.2C, is commonly used to denote "frost". This dates from the report "Frost is the Australian Region" by Foley in 1945 - a rather interesting read. Interestingly, Foley writes "There is nothing fundamental about the definition... it merely serves as a basis for comparison of conditions approximating frost." Certainly, the definition worked in Box Hill last night where we had 1.4C and lots of frost. In fact the garden was whiter this morning than on any morning during winter. Regards, David. Dr David Jones Climate Analysis Section National Climate Centre Bureau of Meteorology Fax : (+61 3) 9669 4678 GPO Box 1289K, Melbourne Ph (work): (+61 3) 9669 4861 Victoria 3001, Australia Ph (home): (+61 3) 9898 4425 email : D.Jones at bom.gov.au +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Les" To: Subject: Re: aus-wx: UK floods - more rain Date: Mon, 16 Oct 2000 22:34:48 +0100 X-Mailer: Microsoft Outlook Express 5.00.2919.6600 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com ----- Original Message ----- From: "Adam Mayo" To: "Australian Severe Weather Mailing List" Sent: Monday, October 16, 2000 11:34 PM Subject: aus-wx: UK floods - more rain > Hi everyone, > > Just heard that Lewes Library in Sussex Lewes has taken a hammering in the last few days as has a lot of the south coast, if you subscribe to uk.sci.weather there are a lot of threads with a lot of flak relating to our Met Office and the BBC missing the target more than once, this has been happening much more of late as the money men and 'bean counters' have moved into the UKMO big style... just pray that your very own BoM doesn't go this way! If you don't subscribe to uksciweather try this: Open both IE and Outlook Express **at the same time** (IE users), Netscape should open itself (Netscape users), Eudora and IE / Netscape should also work as long as the Windows internet settings are correct for mail and news readers; Click on the link below: news://news.virgin.net Download the newsgroups and then subscribe to the one of your choice, it'll produce another subfolder with news.virgin.net with your subscribed NG(s) below it. It worked for Jane at MSC as she was following the rearward sloping anafront thread (usually a good source of tornadic action in our winter) on this NG, you'll find a lot more weather and less yahoo than on wx-chase (and you'll find me - especially on the more severe weather threads). Les ------------------------------------------------------ Les Crossan Wallsend, Tyne & Wear, UK 54-59N 01-30W UK Storm Chaser / Severe Weather Enthusiast www.uksevereweather.org.uk Tornado and Storm Research Organisation (TORRO) - UK Thunderstorm Census Organisation (TCO) - UK http://www.torro.org.uk/ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: mm_de at postoffice.utas.edu.au X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Tue, 17 Oct 2000 10:56:07 +1100 To: aussie-weather at world.std.com From: Miguel de Salas Subject: aus-wx: Low temps. overnight in southern TAS Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com We had -3 at home, which is the lowest it has been all year yet. Interesting to see after the snow and hail yesterday. The temperature dropped from 8 degrees at 12:10 pm to 3.6 at 12:20, with a hail shower. The hail gave way to snow, which eventually gave way to rain. The cold air remained over us, but conditions overnight were very still and clear. The dog's water bucket outside was frozen, as was any open water, and there was hoar frost over the potatoes (needless to say, the ex-potatoes) nearly 2 cm long... Bad news to some in the area: grapes and hops were already well on the way, and potential yields will have been much reduced by this late frost. Potatoes, tomatoes and pumpkins have all fallen victim in my garden too :) Miguel de Salas mailto:mm_de at postoffice.utas.edu.au School of Plant Science, University of Tasmania, GPO Box 252-55, Hobart, Tasmania, Australia, 7001. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: mm_de at postoffice.utas.edu.au X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Tue, 17 Oct 2000 11:37:35 +1100 To: aussie-weather at world.std.com From: Miguel de Salas Subject: aus-wx: Frost Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Bussie, Here in Tasmania the a light frost is considered to have ocurred if the air temperature dropped below 2.8 (above zero). A severe frost is under -0.5. The reason why you can have frost on the ground (and ground temperatures of -1.5) when the air temp is 2 C, is because of the way the earth loses heat to the atmosphere. When you have a clear, still night, and a low enough air temperature (+2, for example), open ground (and grass, cars, etc) radiate long-wave IR out to the atmosphere. If there is cloud cover, this is reflected back to earth (water is a good IR reflector), but on clear nights, the ground decreases in temperature as energy is irradiated into space, and the air becomes very well stratified, so that 1.5m above the ground it is over zero, but as you get closer to the ground, the temp. decreases. Cold air being heavier aids this stratification process. If on top of this you have a humid atmosphere, you get frost. Once the air temperature drops below zero, other effects than frost become apparent: free standing water not directly exposed to the sky (such as in pot saucers in a verandah) will freeze, and so on. But frosts can occur with air temperatures of four degrees, and the BoM does refer to these as 'frosts', at least here in Tassie, as ice forms on the ground. Cheers! Miguel de Salas mailto:mm_de at postoffice.utas.edu.au School of Plant Science, University of Tasmania, GPO Box 252-55, Hobart, Tasmania, Australia, 7001. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Mon, 16 Oct 2000 21:11:38 -0400 From: "Leslie R. Lemon" Subject: aus-wx: aussie frost... To: "INTERNET:aussie-weather at world.std.com" X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id VAA14035 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com All: First let me say that all I get from this location are very brief connections to the internet so I am unsure all that has been said already. If this is redundant, please ignore this. In the study of meteorology, one of the subjects one studies is heat transfer, and the various methods of heat transfer. One of those methods is radiative heat transfer. As it turns out, the air temperature at about 5 ft above the ground can easily be above freezing but surfaces such as your windshield, the metal surface of your car, the ground and vegetative ground cover, and other objects are very good "radiators". That is they radiate heat and they fall below freezing themselves as does the air temperature within a cm or two from these objects. Thus, they do become coated with frost even though the air temp some distance (a few feet or a meter) above the surface remains above freezing. > In Aus. my understanding is that a screen level minimum of 36F or 2.2C, is > commonly used to denote "frost". This dates from the report "Frost is the > Australian Region" by Foley in 1945 - a rather interesting read. > Interestingly, Foley writes "There is nothing fundamental about the > definition... it merely serves as a basis for comparison of conditions > approximating frost." Les ************************ Leslie R. Lemon Radar, Severe Storms, & Research Meteorologist Phone: 816-373-3533, cell: 816-213-3237 E-Mail: lrlemon at compuserve.com +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: Blair Trewin Subject: Re: aus-wx: cold night in Vic To: aussie-weather at world.std.com Date: Tue, 17 Oct 2000 11:03:40 +1100 (EST) X-Mailer: ELM [version 2.5 PL2] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com > > BOM forecasting -2 for Wangaratta, Bendigo and Seymour and even 5 for > Melbourne - all low for mid October???? > > Don W Didn't quite live up to expectations, except in the Melbourne area. Most of rural Victoria was colder on either Monday or Wednesday last week. Laverton broke its short-lived October record with -1.0. (The fact that two records have been set there this month makes me wonder if something has gone on with the site). Melbourne's 4.8 is its lowest in October since 1995, and its lowest so late in spring since 1984 (also 4.8 on 17 October). Hobart's 1.8 is its lowest in October since 1983 and the lowest so late in spring since 1944. Looking at October nights below 5 in Melbourne is a striking demonstration of how minima there have warmed over the years (due mainly to urbanisation rather than large-scale climate change). Prior to 1960 an October night of 4.8 would have been unexceptional (about 80% of years would have had at least one), but only five of the last 30 years have been lower. The mean annual frequency of October minima below 5 hovered between 2 and 3 for most of the period up until 1920, then fell to around 1.5 over the 1920-60 period, before plunging to its present level of around 0.3 -close to a 90% drop from the peak frequency. (Similar results can be found for winter minima below 0). Comparison of a number of measures with surrounding regions suggest that the bulk of the warming in Melbourne took place between 1955 and 1970 (my theory, which I've never explored more deeply, is that it can be attributed to the increase in motor traffic near the observation site, which is at the junction of two major roads), and that the magnitude of the urban heat island has remained fairly stable since 1970 - perhaps because the immediate vicinity is as built-up as it's ever going to get and there is enough passing traffic to keep the air near the site continuously 'stirred up'. Blair Trewin +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: Blair Trewin Subject: Re: aus-wx: Severe Reports 13 Oct 2000 To: aussie-weather at world.std.com Date: Tue, 17 Oct 2000 11:23:42 +1100 (EST) X-Mailer: ELM [version 2.5 PL2] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com > > Harald > > Some others on the list know more about this than I do, but each state > office of the Bureau maintains a severe weather database which records > reports like your theoretical one. Much of the current information > comes from the 12,000 or so storm spotters the Bureau has cultivated. > Unfortunately, access to the database usually means a personal visit > to the relevant state office. Something that ASWA might like as a > challenge is to persuade the state offices to get the database onto > the Net in some form -- easy availability of the data would not only > be good for research outside the Bureau, but would undoubtedly > generate corrections/additions to existing reports and an enthusiasm > to expand the database. An issue we've got on the agenda is how to go about getting this information into a coherent basis - at the moment it's maintained by the regional offices on a state-by-state basis and everyone does it a different way. Ultimately we (the National Climate Centre) want to have a severe storms database set up in the same way as the general climate database - but at the moment it is in the queue behind a few other areas (e.g. hourly METAR observations, tropical cyclones) and I suspect that it will be at least a couple of years before it gets done. I don't think a national database will find its way onto the web for some time, for that reason, but individual states may put something up (although nothing ever happens quickly here!). On a bit of a tangent, something I want to get set up in the not overly-distant future relates to the extremes verification work we're doing here - the idea being that there would be a web page with the various national/state extremes, and links to background material on those extremes (e.g. charts, satellite images, press reports, details on any other observations which were discounted, etc.). This has been held up because the concept of a National Climate Extremes Committee (whose job it would be to ratify extremes) has run into bureaucratic obstacles, but I hope it will happen eventually. Blair Trewin +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "David Findlay" To: Subject: aus-wx: Cell near Beaudesert? Date: Tue, 17 Oct 2000 11:37:33 +1000 X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Looks like a storm cell near Beaudesert, SE-QLD. It is on the Marbug Local Scale radar. David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Nathan French" To: Subject: RE: aus-wx: That answers that Date: Tue, 17 Oct 2000 09:45:55 +1000 X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2911.0) Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com HI all, David, Would it be ok if i got a copy of the plans for that detector, It would be greatly welcome. Nathan French Wangaratta. Vic -----Original Message----- From: aussie-weather-approval at world.std.com [mailto:aussie-weather-approval at world.std.com]On Behalf Of David Findlay Sent: Tuesday, 17 October 2000 08:02 To: aussie-weather at world.std.com Subject: RE: aus-wx: That answers that >The lightning tracker only shows Cloud-Ground strikes (CG's), and much of >what you can see are cloud-cloud (CC's - not chips :)), which it doesn't >record. I also can see the activity from Mt. Crosby. >Always wondered what a lightning tracker showed. Now I know. Thanks for >that. Here's the technical bit. How does it know it's a cloud to ground? Is >it because it's gone to ground and therefore "earth's" and gets detected >that way? Maybe the one that they are using only shows CG's. But the design which I am going to build as soon as I manage to get the time will be capable of detecting both. It will just require more software changes. The current software used by the uni that runs the one in the US only detects CG's, but the professor there told me that with extra software I could detect both. David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "David Findlay" To: Subject: RE: aus-wx: That answers that Date: Tue, 17 Oct 2000 11:56:39 +1000 X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com >HI all, >David, Would it be ok if i got a copy of the plans for that detector, >It would be greatly welcome. >Nathan French >Wangaratta. Vic Hello I don't actually have paper plans for it but the plans are on the web at: http://bub2.meteo.psu.edu/default.htm The unit they have got is quite large, but based on what the Professor in charge has told me a unit half the size should still have a range of at least 200km. Also the magnetic field plate on top can be replaced with a vertical whip antenna. If you decide to build one, please keep in contact with me. I am planning to start mine later this year when I get time. We can share control software and information on getting the units working. This unit also only requires one detector not a whole group of them. David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Nathan French" To: Subject: RE: aus-wx: That answers that Date: Tue, 17 Oct 2000 13:34:07 +1000 X-Mailer: Microsoft Outlook CWS, Build 9.0.2416 (9.0.2911.0) Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Thank for that web adress, I will take a look at it, If you like I have some other plans for a sferics (atmospheric electromagnetic radiation) device. Thanks again.. Nathan Wangaratta Vic. -----Original Message----- From: aussie-weather-approval at world.std.com [mailto:aussie-weather-approval at world.std.com]On Behalf Of David Findlay Sent: Tuesday, 17 October 2000 11:57 To: aussie-weather at world.std.com Subject: RE: aus-wx: That answers that >HI all, >David, Would it be ok if i got a copy of the plans for that detector, >It would be greatly welcome. >Nathan French >Wangaratta. Vic Hello I don't actually have paper plans for it but the plans are on the web at: http://bub2.meteo.psu.edu/default.htm The unit they have got is quite large, but based on what the Professor in charge has told me a unit half the size should still have a range of at least 200km. Also the magnetic field plate on top can be replaced with a vertical whip antenna. If you decide to build one, please keep in contact with me. I am planning to start mine later this year when I get time. We can share control software and information on getting the units working. This unit also only requires one detector not a whole group of them. David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Originating-IP: [155.144.17.252] From: "Simon" To: aussie-weather at world.std.com Subject: Re: aus-wx: aussie frost... Date: Tue, 17 Oct 2000 13:14:43 EST X-OriginalArrivalTime: 17 Oct 2000 03:14:43.0332 (UTC) FILETIME=[6507BC40:01C037E8] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I know my car turned into an iceblock overnight in Tyabb. I hope the Strawberries survive! >Certainly, the definition worked in Box Hill last night where we had >1.4C >and lots of frost. In fact the garden was whiter this morning >than on any >morning during winter. >Regards, >David. >Dr David Jones _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Bradley Filmer" To: Subject: Re: aus-wx: That answers that Date: Tue, 17 Oct 2000 11:47:30 +0800 X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Are there any Aust / West Aust web resources for lighnting detectors/locators that are up and running. ie to track storms in Perth, or is this something that has not yet been done. I would be interested if there were any known resources available. cheers Bradley Filmer ----- Original Message ----- From: Nathan French To: Sent: Tuesday, October 17, 2000 11:34 AM Subject: RE: aus-wx: That answers that > Thank for that web adress, I will take a look at it, > If you like I have some other plans for a sferics (atmospheric > electromagnetic radiation) device. > Thanks again.. > Nathan > Wangaratta Vic. > > -----Original Message----- > From: aussie-weather-approval at world.std.com > [mailto:aussie-weather-approval at world.std.com]On Behalf Of David Findlay > Sent: Tuesday, 17 October 2000 11:57 > To: aussie-weather at world.std.com > Subject: RE: aus-wx: That answers that > > > >HI all, > >David, Would it be ok if i got a copy of the plans for that detector, > >It would be greatly welcome. > >Nathan French > >Wangaratta. Vic > > Hello > > I don't actually have paper plans for it but the plans are on the web at: > http://bub2.meteo.psu.edu/default.htm > > The unit they have got is quite large, but based on what the Professor in > charge has told me a unit half the size should still have a range of at > least 200km. Also the magnetic field plate on top can be replaced with a > vertical whip antenna. > > If you decide to build one, please keep in contact with me. I am planning to > start mine later this year when I get time. We can share control software > and information on getting the units working. > > This unit also only requires one detector not a whole group of them. > > David > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Wilson" Organization: Griffith University To: aussie-weather at world.std.com Date: Tue, 17 Oct 2000 14:06:46 +1000 Subject: Re: aus-wx: That answers that X-mailer: Pegasus Mail for Win32 (v3.12b) Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Try this link site, it shows many web sites about the weather/Images/Lighting, maybe you can find something that you want in there. http://www.angelfire.com/ak3/machill/ccc.html Wilson =^o^= Are there any Aust / West Aust web resources for lighnting detectors/locators that are up and running. ie to track storms in Perth, or is this something that has not yet been done. I would be interested if there were any known resources available. cheers Bradley Filmer ----- Original Message ----- From: Nathan French To: Sent: Tuesday, October 17, 2000 11:34 AM Subject: RE: aus-wx: That answers that > Thank for that web adress, I will take a look at it, > If you like I have some other plans for a sferics (atmospheric > electromagnetic radiation) device. > Thanks again.. > Nathan > Wangaratta Vic. > > -----Original Message----- > From: aussie-weather-approval at world.std.com > [mailto:aussie-weather-approval at world.std.com]On Behalf Of David Findlay > Sent: Tuesday, 17 October 2000 11:57 > To: aussie-weather at world.std.com > Subject: RE: aus-wx: That answers that > > > >HI all, > >David, Would it be ok if i got a copy of the plans for that detector, > >It would be greatly welcome. > >Nathan French > >Wangaratta. Vic > > Hello > > I don't actually have paper plans for it but the plans are on the web at: > http://bub2.meteo.psu.edu/default.htm > > The unit they have got is quite large, but based on what the Professor in > charge has told me a unit half the size should still have a range of at > least 200km. Also the magnetic field plate on top can be replaced with a > vertical whip antenna. > > If you decide to build one, please keep in contact with me. I am planning to > start mine later this year when I get time. We can share control software > and information on getting the units working. > > This unit also only requires one detector not a whole group of them. > > David > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ ********************************************************* Weather Link Pages http://www.angelfire.com/ak3/machill/ccc.html ********************************************************* Copyright by WIL =^o^= 2000c +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "James Chambers" To: Subject: Re: aus-wx: Cell near Beaudesert (& other storms) Date: Tue, 17 Oct 2000 14:41:25 +1000 X-Mailer: Microsoft Outlook Express 4.72.3110.1 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi David and all Yes it was a storm cell. This has weakened of course but there are many other showers and low top weak thunderstorms around the place. The better cells are likely to have hail because of the cold air above us. Last night Brisbane had a 500mb temp of -17C and a 350mb temp of -40C and today at 00z these were almost exactly the same. Both of these are much colder than normal at these levels. Talking about last night, the storms that Anthony experienced at Southport moved and propagated NNE along the SE Qld Coast. For those in Brisbane who didn't see it, you certainly missed a pretty good lightshow. I took about 8mins of video and tried my hand at some lightning pics with my SLR, but several times as soon as I shut the shutter an awesome CG would pop out the side of the storm. Doh! Onto other storms, a nice line of intense storms are currently situated over Western SA - there is a Severe Weather Advice for these. They look best on satpics: http://www.npmoc.navy.mil/satimages/gmsd.jpg Anyway that's all from me. Regards James Chambers www.qldstorms.com >Looks like a storm cell near Beaudesert, SE-QLD. It is on the Marbug Local >Scale radar. > >David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "John Graham" To: "IRDX Mailing List" , "Aussie Weather" , "Chris Edmondson" , "Chris McHattan" , "Craig Duley" , "DK" , "Geoff Lydeamore" , "Jamie" , "Janet Duley" , "Lawrie" , "Ma" , "Neville Ross" , "Noel & Aida Baker" , "Phil & Kris" , "Reg Robinson" , "Robert Chad" , "Rod Bray" , "Simon Costa" , "Tom Sundstrom" Subject: aus-wx: Fw: The Luck of the Irish Date: Tue, 17 Oct 2000 15:32:29 +1000 X-Mailer: Microsoft Outlook Express 5.50.4133.2400 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Don't blame me for these jokes...they were sent to me by my brother.............good laugh though..... John > These are truly awful... > > > Two Irishmen walk into a pet shop. Right away they go over to the bird section. > Gerry says to Paddy, "Dat's dem." > The clerk comes over and asks if he can help them. > "Yeah, we'll take four of dem dere birds in dat cage oer' dere," says Gerry, > "Put dem in a peeper bag." > > The clerk does and the two guys pay for the birds and leave the shop. > > They get into Gerry's van and drive until they are high up in the hill and > stop at the top of a cliff with a 500-foot drop. > "Dis looks loike a grand place, eh?" says Gerry. > He then takes two birds out of the bag, places them on his shoulders and > jumps off the cliff. > > Paddy watches as his mate drops off the edge and goes straight down for a > few seconds followed by a 'SPLAT'. > As Paddy looks over the edge of the cliff he shakes his head and says, "dis > budgie jumpin' is too dangerous for me." > > ============= PART TWO =================== > > A minute later, Seamus arrives. He too has been to the pet shop and he > walks up carrying the familiar 'peeper bag'. He pulls a parrot out of the > bag, and then Paddy notices that, in his other hand, Seamus is carrying > a gun. > > "Hi, Paddy. Watch dis," Seamus says and launches himself over the edge > of the cliff. > > Paddy watches as half way down, Seamus takes the gun and blows the parrot's > head off. > Seamus continues to plummet until there is a 'SPLAT'!, as he joins Gerry's > remains at the bottom. > > Paddy shakes his head and says, "An' oim never troyin' dat parrotshooting > nider." > > ============= PART THREE ================== > > A few minutes after Seamus splats himself Sean strolls up. He too has been > to the pet shop and he walks up carrying the familiar 'peeper bag'. > > Instead of a parrot he pulls a chicken out of the bag, and launches himself > off the cliff with the usual result. > > Once more Paddy shakes his head - "Sean, first der was, Gerry wit > his budgie jumping, den Seamus parrotshooting and now you hen gliding." > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Paul Mossman" To: Subject: aus-wx: Possible early start to the Monsoon season Date: Tue, 17 Oct 2000 15:41:48 +1000 X-Mailer: Microsoft Outlook Express 5.00.2919.6600 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi all. This is from the BOM today: << The RSMC region* is still in an active phase of the 30-60 day (Madden-Julian) ISO. Over the last week time-longitude series and OLR images from NOAA indicate that broad areas of enhanced convection have intensified, and extended further eastward and southward of the equator. During the week a cyclonic storm formed in the Bay of Bengal. Upper level (200 hPa) velocity potential series show westward propagation of the velocity potential maximum. Station pressure series from the four tropical locations are in coherent mode supporting the current ISO pattern. The 30-60 day ISO has had a period of around 50 days. If this periodicity continues, the next enhanced pulse of convection will move into RSMC area during the third week of November, with the possible formation of the monsoon trough in the southern hemisphere. Over the eastern parts of the RSMC region a weak low level circulation formed north of the equator late in the week, and to the south of the equator southeasterly non convergent flow and suppressed convection persisted through the week>> Hmm could be interesting - the trough is always a good sign for possible cyclogensis. Wait & see............. JJ in Karratha get ya storm shelter ready! paul in a freezing Sydney. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "David Findlay" To: Subject: aus-wx: Chasing Twisters on the net Date: Tue, 17 Oct 2000 14:45:12 +1000 X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com http://www.incredibleweather.com/english/cameras.html Try this out. You can chase tornados on the internet in full safety. Maybe this will help me refine my storm forcasting techninques, because you can have full access to radar and synoptics with DA and view pictures on the net! David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "David Findlay" To: Subject: aus-wx: Any chance for SE-QLD Date: Tue, 17 Oct 2000 14:37:43 +1000 X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Looks like some showers on the radar near Ipswitch. One has some green stuff in it. Any chance of these developing into thunderstorms? David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Bradley Filmer" To: Subject: Re: aus-wx: That answers that Date: Tue, 17 Oct 2000 13:03:30 +0800 X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Thanks I will try these sites and see what I can find. Being new to this list ( but not to the weather) I appreciate the feedback and apologise if this info is located in an FAQ or to the long standing members that may see this question or similar asked frequently...... Thanks v.much cheers bradf ----- Original Message ----- From: Wilson To: Sent: Tuesday, October 17, 2000 12:06 PM Subject: Re: aus-wx: That answers that > Try this link site, it shows many web sites about the > weather/Images/Lighting, maybe you can find something that you > want in there. > > http://www.angelfire.com/ak3/machill/ccc.html > > Wilson =^o^= > > > Are there any Aust / West Aust web resources for lighnting > detectors/locators that are up and running. ie to track storms in Perth, or > is this something that has not yet been done. I would be interested if there > were any known resources available. > > cheers > Bradley Filmer > > > > > ----- Original Message ----- > From: Nathan French > To: > Sent: Tuesday, October 17, 2000 11:34 AM > Subject: RE: aus-wx: That answers that > > > > Thank for that web adress, I will take a look at it, > > If you like I have some other plans for a sferics (atmospheric > > electromagnetic radiation) device. > > Thanks again.. > > Nathan > > Wangaratta Vic. > > > > -----Original Message----- > > From: aussie-weather-approval at world.std.com > > [mailto:aussie-weather-approval at world.std.com]On Behalf Of David Findlay > > Sent: Tuesday, 17 October 2000 11:57 > > To: aussie-weather at world.std.com > > Subject: RE: aus-wx: That answers that > > > > > > >HI all, > > >David, Would it be ok if i got a copy of the plans for that detector, > > >It would be greatly welcome. > > >Nathan French > > >Wangaratta. Vic > > > > Hello > > > > I don't actually have paper plans for it but the plans are on the web at: > > http://bub2.meteo.psu.edu/default.htm > > > > The unit they have got is quite large, but based on what the Professor in > > charge has told me a unit half the size should still have a range of at > > least 200km. Also the magnetic field plate on top can be replaced with a > > vertical whip antenna. > > > > If you decide to build one, please keep in contact with me. I am planning > to > > start mine later this year when I get time. We can share control software > > and information on getting the units working. > > > > This unit also only requires one detector not a whole group of them. > > > > David > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > > with "unsubscribe aussie-weather your_email_address" in the body of your > > message. > > -----------------------jacob at iinet.net.au------------------------------ > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > > with "unsubscribe aussie-weather your_email_address" in the body of your > > message. > > -----------------------jacob at iinet.net.au------------------------------ > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > ********************************************************* > Weather Link Pages > http://www.angelfire.com/ak3/machill/ccc.html > ********************************************************* > Copyright by WIL =^o^= 2000c > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: carls at ford.ace-net.com.au Date: Tue, 17 Oct 2000 15:07:35 +1000 To: Aussie Weather List From: Carl Smith Subject: aus-wx: SUMMARY: August TC Summary - Part 1 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com MONTHLY GLOBAL TROPICAL CYCLONE SUMMARY AUGUST, 2000 (For general comments about the nature of these summaries, as well as information on how to download the tabular cyclone track files, see the Author's Note at the end of this summary.) NOTE: The August summary is being disseminated in three parts. But instead of breaking the summary up by basins, I am going to attempt to cover storms in all the basins forming in 10-day periods. Part 1 will cover tropical cyclones forming in the period 1-10 August. The entire history of these systems will be covered in this installment. *********************************************************************** ACKNOWLEDGEMENTS I would like up front to extend a very special thanks to two young gentlemen who helped me in a very big way with this portion of the summary. John Wallace, a student at the University of Texas in San Antonio, wrote the narratives for Northeast Pacific cyclones Fabio, Gilma, and Hector. (Also, the write-up for Tropical Storm Ileana which will appear in the next installment.) Eric Blake, a graduate student at Colorado State University and a member of the CSU seasonal forecast team, wrote the summary for Hurricane Alberto while working a two-month stint at TPC/NHC. This portion of the summary is already a month later than I would have liked, and without the contributions from Eric and John, would likely have been two more weeks in preparation. *********************************************************************** AUGUST HIGHLIGHTS --> Northeast and Northwest Pacific basins very active --> Destructive super typhoon strikes Taiwan and Chinese mainland --> Central North Pacific area remains active --> Long-lived Atlantic hurricane sets several records *********************************************************************** ***** Topic of the Month for August ***** NOTE!!! This feature will appear in Part 3 of the August summary. *********************************************************************** ACTIVITY BY BASINS ATLANTIC (ATL) - North Atlantic Ocean, Caribbean Sea, Gulf of Mexico Activity for August: 1 tropical depression 1 possible tropical depression or storm ** 1 subtropical storm 2 tropical storms 2 hurricanes ** - no warnings were issued on this system by TPC/NHC NOTE: Much of the information presented below was obtained from the TPC/NHC discussion bulletins issued with every regular advisory. All references to sustained winds imply a 1-min averaging period unless otherwise noted. And, as noted above, the summary for Hurricane Alberto was written by Eric Blake. Atlantic Tropical Activity for August ------------------------------------- Following two tropical depressions in the month of June, the Atlantic basin was very quiet through the month of July as unfavorable upper-level westerlies spread over much of the basin at lower latitudes. However, the situation changed very quickly in August as the long-lived Hurricane Alberto formed early in the month and lasted almost three weeks. Alberto became the first hurricane and the first major hurricane (Category 3 on the Saffir/Simpson scale) of the season as winds climbed to 110 kts. Three more storms were named during the month, but only one--Debby--reached minimal hurricane intensity. In addition, advisories were issued on a tropical depression (TD-04) off the east coast of Florida. Another system attended by deep convection moved northeastward off the mid-Atlantic coast on 10-13 Aug. A reconnaissance aircraft flew into the system on the afternoon of the 10th but found no closed low-level circulation. But as the LOW moved northeastward on 11 Aug it did appear to have a circulation. SAB assigned T-numbers of 2.0 during the morning of 12 Aug and a ship reported 35-kt winds around 1200 UTC. For these reasons I am including a report on this system, which I have dubbed "Lambda", in this summary. Finally, a LOW with some distinctive subtropical characteristics developed in the western Atlantic just off the southeast U. S. coast in late August and moved inland along the North Carolina coast on the 30th. David Roth of HPC has supplied me with a track for this system, and it appears to have briefly reached subtropical storm intensity on 30 Aug. This first installment of the August summary will include reports on Hurricane Alberto, Tropical Depression #4, and the possible tropical cyclone "Lambda". Hurricane Alberto (TC-03) 4 - 23 August -------------------------- Alberto broke a number of records for the Atlantic basin as it slowly moved across the Atlantic for about 20 days. Alberto was the longest-lived tropical storm on record in August in the Atlantic basin, maintaining tropical storm status for 19.25 days. It was also the third longest-lived tropical storm on record, behind Ginger of 1971 (21.25 days) and Carrie of 1957 (19.50 days). The storm completed the largest loop ever noted over the Atlantic, spanning approximately 5 degrees latitude by 8 degrees longitude. Alberto also became a major hurricane unusually far to the north--about 35N. It is also remarkable how low the shear was during most of the life of the storm, with the storm coming close to its Maximum Potential Intensity estimate. Alberto actually increased in strength a couple of times while the water temperatures were decreasing under its path, illustrating the dominance of vertical shear on the intensification process of tropical cyclones. The first sign of Alberto can be traced to an extremely large MCS with cloud temperatures below -88 C that fired over central Africa on 30 Jul. This system tracked to the west and was very convectively active, coming off the African coast with large pressure falls and a 50-kt jet at 700 mb over Dakar. This site in Senegal received about 25 mm of precipitation as the wave moved through, which is a rather heavy amount for this location. The system moved off the coast on 3 Aug and an unknown ship reported southeast winds of 37 kts just off the African coast. Ship MZYF3 reported 45 kts and a pressure of 1007.8 mb at 0600 UTC on the 4th and Alberto was born. It is probable that this system was already a tropical storm as it emerged from the coast, judging from the excellent satellite appearance and the ship reports. Alberto moved to the west-northwest and continued to intensify under a favorable outflow pattern. A banding-type eye was noted late on the 4th and a CDO feature was observed on the 5th, with the appearance of an eye later that afternoon. Alberto was upgraded to a hurricane about 425 nm west of the Cape Verde Islands at 05/1800 UTC. However, its intensification was limited as it began to move over cool waters of about 25-26 degrees C. The storm reached an initial peak intensity of about 80 kts on the 7th before southwesterly wind shear began to take its toll. Alberto maintained minimal hurricane status until 1800 UTC on the 8th when it took a turn to the northwest into even cooler waters and weakened into a tropical storm. A weak mid-level ridge over the Central Atlantic persisted, preventing any recurvature of the system. Two days later Alberto moved over anomalously warm water in the Mid-Atlantic. This effect, combined with weaker vertical wind shear, helped to re-strengthen the storm into a hurricane by 1800 UTC on the 9th. Alberto's track began to curve more to the north and it slowly intensified. The storm passed about 215 nm east of Bermuda around 1200 UTC on 11 Aug. Unlike most hurricanes, Alberto reached its maximum intensity after recurvature, becoming a major hurricane on the morning of the 12th north of 35N. A large, 45 nm-wide eye was noted on visible satellite images and, based upon T-numbers of 6.0 from TAFB and 5.5 from SAB, the MSW was increased to its peak intensity of 110 kts later that day, notably very close to its estimated Maximum Potential Intensity (MPI) as calculated by the Demaria/Kaplan scheme. The hurricane's center was located roughly 535 nm east-northeast of Bermuda at the time it reached its estimated peak intensity. Most model guidance took Alberto rapidly northeastward over the North Atlantic, merging with an extratropical cyclone and losing tropical characteristics, but the storm had other ideas. The GFDL was the first model to indicate that the storm would miss the trough and begin to execute a loop. The track bent from northeast to east and never crossed 40N, where extremely high wind shear and cool SSTs would have killed the storm. A large high-pressure system was building in the North Atlantic and Alberto was unexpectedly trapped underneath the ridge. Alberto slowed down and weakened some as it was moving over SSTs of about 23 C. The hurricane diminished and became a sheared tropical storm on the 14th. The track took a hard turn toward the right and Alberto began to slowly move southward, averaging a forward speed of less than 10 kts. The cloud pattern at times did not look very tropical, with limited deep convection providing some evidence of Alberto taking on subtropical characteristics on the 15th. The storm weakened further--to 40 kts--and began to move toward the southwest. However, wind shear decreased and SSTs warmed along the path of the storm, allowing for the regeneration of considerable convection on the 16th as Alberto turned toward the west-southwest. The storm began to re-intensify slowly as it proceeded to move to the west on the 17th. Alberto took a sharp turn toward the northwest as a large, slow-moving mid-latitude trough was carving out over the eastern United States. A possible eyewall was noted in AMSU images late on the 17th and Alberto became a hurricane again for the third time on the 18th. This is notable because I could not find a tropical system in the Best Track database that had re-intensified into a hurricane three times after having weakened to a tropical storm, and Alberto may very well have been the first. The hurricane continued to intensify as it moved slowly northward since wind shear was near zero. Even though water temperatures were decreasing, Alberto peaked again with an intensity of 95 kts on the afternoon of the 19th with a large, 50-nm wide ragged eye. The hurricane continued to move unusually slowly to the north as it remained contained under a large ridge. The high-pressure system gradually broke down as the large trough finally began to pick up the storm. Alberto turned to the north-northeast and accelerated while traveling over progressively cooler waters, completing its large anticyclonic loop on the morning of the 21st. The hurricane maintained an eye-like feature and hurricane status until the evening of the 22nd as it was screaming northeastward, far into the North Atlantic (nearing 50N). Alberto transitioned into an extratropical cyclone just south of Iceland, as indicated by satellite pictures. It is quite unusual for a storm to retain tropical characteristics up to 53N as Alberto did, the last storm to do so being Hurricane Frances in 1980. No reports are available on the impact of Alberto on Iceland, but it is estimated that winds in excess of tropical storm force were felt there. Some swells were reported along the U. S. East Coast a few days after the storm's recurvature. Tropical Depression (TD-04) 4 - 10 August ---------------------------- A small area of disturbed weather formed on 4 Aug approximately 525 nm east-southeast of Bermuda. The attendant weak LOW initially drifted southwestward, then westward over the next several days. By 6 Aug a few showers and thunderstorms were occurring in association with the small LOW. The system passed about 300 nm south of Bermuda around 07/0000 UTC and thereafter took a short jog to the northwest before resuming its westward motion. On the afternoon of the 8th the LOW was roughly 275 nm east of Cape Canaveral when it was visited by a U. S. Air Force Reserve Hurricane Hunter flight. The plane, flying at 450 m, reported a peak FLW of 37 kts in the north quadrant at 1851 UTC, and later reported finding winds to 47 kts in the west quadrant at 2003 UTC. The minimum pressure reported by the flight was 1010 mb. However, the system lacked any organized thunderstorm activity so TPC/NHC did not at this time classify the system as a tropical depression. During the evening some winds of 20-30 kts were reported over a limited area near the center as the system moved to the west-southwest at around 8 kts. By the morning of 9 Aug some intermittent convection was occurring over a limited area near the center, and the first advisory on TD-04 was issued at 1500 UTC with the system located approximately 175 nm east-southeast of Cape Canaveral. Satellite intensity estimates were only 25 kts, but the LLCC appeared to be better defined than the day before and the initial intensity was set at 30 kts. The depression, which really seemed to be more subtropical than tropical, was moving slowly westward at only 3 kts. A reconnaissance flight during the afternoon found maximum FLW of 39 kts in the northwest quadrant with the minimum CP still holding at 1010 mb. During the evening a buoy (WMO 41010), located about 50 nm north of the center, reported winds of 20 kts. The depression reached the westernmost point in its track around 10/0600 UTC when it was centered about 70 nm east of Cape Canaveral. During the morning Melbourne Doppler radar showed some well-organized banding features associated with the small depression, but overall the cloud pattern still looked ragged due to easterly shear. Reports from buoy 41010 suggested that the depression had lost the tight wind core it had exhibitied over the previous two days. During the 10th the system's motion became generally northeastward, and by evening the strong vertical shear had taken its toll and the depression appeared weaker. A reconnaissance aircraft did find 31-kt winds southeast of the center at 2146 UTC, but since the system was weakening and the shear was still strong, TPC/NHC issued the final advisory at 11/0300 UTC. The remnants were forecast to move to the northeast and continue to generate a few isolated thunderstorms. John Wallace passed along some interesting, but somewhat disturbing, news to the author. It seems that some meteorologists, including one with a well-known private firm, repeatedly referred to TD-04 as an unnamed tropical storm online, likely because of the stronger winds found by the reconnaissance aircraft. Also, the weather page in a major newspaper in a certain large eastern U. S. city depicted the system as Tropical Storm Beryl spinning around off the Florida coast! Possible Tropical Cyclone "Lambda" 10 - 13 August ---------------------------------- The origins of this system are a little uncertain, but appear to be associated with the northern end of a tropical wave which left the west coast of Africa around 2 Aug. The wave propagated westward across the Atlantic as tropical waves normally do, and by 1800 UTC on 7 Aug was located in the vicinity of 65W where a 1012-mb LOW had formed on the wave axis about 150 nm north-northwest of San Juan, Puerto Rico. By the 8th the wave was producing showers and thunderstorms over waters north of the eastern Bahamas for several hundred miles. All this convective activity was east of the incipient TD-04. (As I have stated earlier several times, for the early history of Atlantic/Northeast Pacific systems, I rely on a running tabular log of tropical waves and LOWs which John Wallace maintains. John's file does not indicate this (the connection was likely not clear from the Tropical Weather Discussions), but according to Todd Kimberlain, the wave which produced this system was the same one which spawned Tropical Storm Beryl and also Pacific Tropical Storm Ileana, both forming from the southern extremity of the wave.) The convection associated with the wave decreased some on the 9th, but on 10 Aug had increased and become better organized. A reconnaissance flight by the Hurricane Hunters investigated the area during the afternoon but did not find a closed low-level circulation; nonetheless, the system appeared to be quite well-organized. (Most of the following is taken from some notes I kept on 11 and 12 Aug after seeing how well-organized the system looked on the morning of the 11th. These were based largely upon animated satellite imagery available on NRL's Monterrey website.) During the evening of the 10th the convective pattern looked even more concentrated and organized. Around 11/0400 UTC a fairly tightly-wound LLCC had disengaged itself from the CDO-feature and was moving northeastward. As early as 10/2200 UTC what appeared to be curved, low-level cloud lines could be seen (in infrared imagery) emerging from the north side of the CDO- feature, and the center may have been moving out by 11/0200 UTC. The convection seemed to stay in place and did not look sheared (to me), but the LLCC continued to move away to the northeast with a quite well-organized pattern of low clouds. By the afternoon of 11 Aug convection had flared up once more near the LLCC as it moved northeastward at around 13-18 kts. This was mentioned in the 2130 UTC Tropical Weather Outlook from NHC, and the track sent to the author by David Roth begins at 1800 UTC, locating the center about 375 nm east-southeast of Charleston. The convection waned some during the night, but by 12/1000 UTC there was a nice round area of deep convection centered near 38.0 N, 65.8 W, and this appeared to be over the LLCC. Infrared satellite imagery from around 1300 to 1330 UTC on 12 Aug again depicted a circular area of deep convection, and visible imagery revealed low-level cloud lines curving into the CDO-feature. SAB assigned a Dvorak T2.0 to the system at 1145 and 1745 UTC but at 2345 UTC assigned a ST1.5 (sub- tropical). There was a ship report of 30-kt winds and a 1014-mb SLP near 32.0 N, 72.0 W at 11/1800 UTC, and more importantly, another ship report of 35-kt winds and a SLP of 1009.9 mb at 1200 UTC on the 12th. This report of gale-force winds was from a point about 150 nm south-southeast of the LOW's center when it was located about 375 nm north of Bermuda. A low-level wind analysis from CIMSS between 1215 and 1645 UTC depicted some 35-kt winds in the system's southern semicircle between 800 and 950 mb. (Thanks to John Wallace for passing this information on to me.) The system continued to scoot on off to the northeast, and by late on the 12th, the deep convection had begun to weaken and the LOW began to merge with a cold front. The exact nature of this system is a little questionable, but David Roth and Todd Kimberlain expressed the opinion (and the author concurs) that to them it looked like a tropical cyclone, and the Dvorak ratings from SAB tend to back this up. The CI numbers of 2.0 would suggest 30 kts, but the 35-kt ship report well to the south of the LLCC implies that winds could have been stronger; hence, the reason for dubbing this system as "Lambda". Hopefully, this system will at least be given a review to see if it might possibly qualify as an unnamed tropical storm. *********************************************************************** NORTHEAST PACIFIC (NEP) - North Pacific Ocean East of Longitude 180 Activity for August: 5 tropical storms ** 2 hurricanes ** - one of these was a "warningless" system which Mark Lander felt reached minimal tropical storm intensity NOTE: Much of the information presented below was obtained from the TPC/NHC discussion bulletins issued with every regular advisory (CPHC for locations west of 140W.) All references to sustained winds imply a 1-min averaging period unless otherwise noted. As mentioned above, the write-ups for Tropical Storm Fabio and Hurricanes Gilma and Hector were prepared by John Wallace. Northeast Pacific Tropical Activity for August ---------------------------------------------- In contrast to July when tropical cyclone activity was somewhat below average, the month of August was rather active in the eastern half of the North Pacific Ocean. As the month opened, former Hurricane Daniel was a weakening tropical storm north of Hawaii. (See the July summary for the full report on Hurricane Daniel.) Five tropical storms formed east of 140W and were assigned names by TPC/NHC. Of these, two--Gilma and Hector--became hurricanes. Another depression in mid-month formed in subtropical latitudes just west of the Dateline and moved northeastward into the Central North Pacific, strengthened, and was named Wene by CPHC. Additionally, another system late in the month southeast and south of Hawaii was not covered in any official warnings, but Dr. Mark Lander of the University of Guam sent me a track for this system which he feels briefly reached tropical storm intensity. I have designated this system with the Greek letter "Mu". Finally, a new tropical depression (TD-13E) formed on the last day of August and became Tropical Storm Kristy on 1 September. This brief cyclone will be covered in the September summary. This first installment of the August summary will cover Tropical Storm Fabio and Hurricanes Gilma and Hector. Tropical Storm Fabio (TC-08E) 3 - 6 August ------------------------------ The origin of Fabio can be traced back to a tropical wave of apparent African origin that tracked off the coast on 21 Jul. The wave tracked uneventfully across the Atlantic and entered the Eastern Pacific on the 30th. The wave spawned a tropical LOW on 2 Aug, after which the convection and organization increased enough to warrant the LOW's upgrade to Tropical Depression Eight-E on 3 Aug at 2100 UTC about 650 nm west-southwest of Manzanillo. The depression tracked westward under the influence of a deep-layer ridge to its north. The tropical cyclone had trouble from the start. Though Eight-E generated strong convection, the cloud pattern indicated stiff easterly shear from a very strong upper-level anticyclone north of the system; the low-level bands were exposed in its eastern semicircle, and the ill-defined LLCC was displaced from the deepest convection. The unfavorable shear was not strong enough to prevent intensification, however, and SSTs were adequate; a slight improvement in the cloud pattern combined with QuikScat data warranted Eight-E's upgrade to Tropical Storm Fabio on 4 Aug at 0300 UTC about 700 nm west of Manzanillo. Fabio's deep convection remained intermittent and asymmetric, though a large convective burst over the LLCC allowed it to strengthen slightly. The storm intensified to a MSW of 45 kts and a CP of 1000 mb at 1500 UTC on the 4th when located roughly 825 nm west of Manzanillo. This was to be Fabio's peak strength, and its organization decayed slowly thereafter. The 2100 UTC advisory on the 4th indicated that the storm might have been weaker than it was earlier that same day, but Dvorak constraints and a persistent bursting pattern allowed for only slow weakening, which was the case through the 4th and well into the 5th. Fabio held its own surprisingly well, and since shear was forecast to weaken and the storm was expected to make a southward turn into warmer waters, re-intensification was consistently forecast. However, the intermittent, sheared deep convection weakened beginning at 1500 UTC on the 5th, and the storm embarked on a more rapid decaying trend as it made an expected, but somewhat erratic, west-southwestward turn. Fabio was downgraded to a depression at 0300 UTC on 6 Aug about 1125 nm west of Manzanillo as convection weakened and became more displaced from the center. Soon, it was little more than a low-level vortex with brief bursts of convection southwest of the LLCC. Compounded with the shear was the entrainment of dry air at the middle to upper levels, as indicated by water vapor imagery. Even so, possible re-intensification was forecast right up until the last advisory, which was issued at 2100 UTC on 6 Aug when the depression was 1250 nm west of Manzanillo. At this time there were signs of interaction with Tropical Storm Gilma to the east, and the circulation became large and amorphous. Satellite data indicated winds of less than 25 kts. The remnants of Fabio generated intermittent convection for some time after the final advisory and were not absorbed by Gilma. In fact, there may have been some interaction between the two cyclones, particularly during Gilma's weakening stage, but there is no proof of this. There were no known deaths or damage associated with Fabio. Hurricane Gilma (TC-09E) 5 - 11 August ------------------------- The origin of Hurricane Gilma can be traced back to a tropical wave that was first noted in the mid-Atlantic on 27 Jul. The wave tracked uneventfully across the Atlantic, entering the NEP basin late on 2 Aug. The wave generated strong convection, and a tropical LOW developed late on the 4th. The organization of the LOW increased steadily, and QuikScat data along with impressive banding warranted its upgrade to Tropical Depression Nine-E at 0300 UTC on 5 Aug about 325 nm south- southwest of Manzanillo. The depression tracked initially west- northwestward along the periphery of a mid-level HIGH to its north. Nine-E was impressive, with plenty of strong convection and a good cyclonic signature. Outflow was well-developed, and overall upper- level conditions were favorable. With this in mind, it is strange that the tropical cyclone intensified at only a modest rate. It was upgraded to Tropical Storm Gilma on the second advisory, at 0900 UTC on 5 Aug, when it was centered some 300 nm southwest of Manzanillo. Gilma briefly maintained this strength, but a north-south elongation of the convection, a poorly-defined circulation, and multiple LLCCs resulted in its downgrade to a tropical depression at 2100 UTC on the 5th. Easterly shear impinging on Gilma also hindered further development. However, outflow remained good in all but the eastern quadrant. Even the NHC was puzzled by its lack of intensification. Convection remained strong, but amorphous and displaced north and west of the center. Occasional flare-ups of intense convection, as well as banding away from the center, made location of the broad center difficult. A discussion at 0900 UTC on the 6th remarked that the easterly shear apparently had no effect on Gilma's convection. By the next advisory, though, Gilma had finally pulled its structure together enough to be re-upgraded to tropical storm status at 1500 UTC on 6 Aug. Easterly shear remained a moderate negative factor, however, and the cyclone's forecast time over warm waters was limited. Gilma intensified steadily from its upgrade through 0900 UTC on the 7th when the trend leveled off somewhat. By the end of this period, Gilma was just below hurricane strength and had a strong CDO with a hint of a warm spot. The SSTs were very favorable, but less-than-ideal upper-level conditions prevented any rapid intensification. Gilma didn't attain hurricane status for a full day after strengthening to 60 kts--not until 0900 UTC on 8 Aug, when it became Hurricane Gilma roughly 525 nm west-southwest of Cabo San Lucas. The 65-kt initial intensity was slightly lower than the satellite estimates, based on a ragged 30-nm eye apparent in SSMI and TRMM imagery. The upgrade occurred as upper-level conditions and outflow improved, allowing Gilma to become more symmetrical. The eye quickly disappeared, but an improving satellite signature warranted an increase in intensity to a MSW of 70-kts and a CP of 984 mb at 1500 UTC on 8 Aug when Gilma was centered some 575 nm west-southwest of Cabo San Lucas. This was to be Gilma's peak, and was maintained through the next advisory, though Gilma was already decaying by then as it entered cooler waters and entrained more stable air. Gilma weakened fairly rapidly, weakening to tropical storm strength by 0300 UTC on the 9th and to a depression by 0300 UTC on the 10th; meanwhile, its track bent slightly more westward as a ridge built to its north. The last advisory on Tropical Depression Gilma was issued at 0300 UTC on 11 Aug when it was located 825 nm west of Cabo San Lucas. The remnant circulation tracked westward in tandem with the remnants of Fabio. No deaths or other damage are known from Gilma; indeed, no public advisories were even issued for this hurricane. Hurricane Hector (TC-10E) 10 - 16 August -------------------------- The "pre-history" of Hurricane Hector deserves as much mention as the hurricane itself; it is an interesting case. Hurricane Hector originated from an African tropical wave that apparently exited the African coast on 30 Jul. It tracked uneventfully across most of the central Atlantic. However, it generated strong convection upon entering the western Caribbean; indeed, a tropical LOW developed east of the wave on 6 Aug. It seemed that formation of a tropical depression was imminent. This was not the case, however--the tropical LOW apparently dissipated by the 8th, and the bulk of the disturbance remained over the Isthmus of Tehuantepec. The disturbance became re-invigorated as it tracked off the Mexican coast as a massive cyclonic disturbance. A tropical LOW formed and was upgraded to Tropical Depression Ten-E the same day, at 2100 UTC on 10 Aug, some 200 nm west-southwest of Manzanillo, Mexico. The upgrade was based on satellite estimates and a report from ship ELXB9. The depression tracked steadily westward to the south of a ridge, its convection fluctuating in a diurnal pattern. The tropical cyclone boasted a large but poorly-organized envelope, and fixes were initially difficult. Intensification was slow to occur as well, though overall conditions were favorable. Information from Socorro Island in conjunction with satellite data indicated that Ten-E was not vertically aligned as of 2100 UTC on the 11th. However, its organization improved enough to warrant its upgrade to Tropical Storm Hector in the next advisory, issued at 0300 UTC on 12 Aug, while located roughly 300 nm southwest of Cabo San Lucas. A report from ship C6RHB of 31-kt surface winds 60 nm northwest of the center was considered in the upgrade. Hector tracked westward, intensifying steadily through the 12th and into the 13th, but slightly hindered by northerly shear. Two surprising developments occurred late on the 13th. Hector reached minimal hurricane intensity at 2100 UTC on 13 Aug, with an estimated MSW of 65 kts and a CP of 987 mb, while located roughly 575 nm west- southwest of Cabo San Lucas. This was to be Hector's peak intensity. Almost simultaneously, the storm veered abruptly northwest, off its previous westward track. Neither event was forecast, though a gradual west-northwest turn had been expected. The turn may have been in response to a weakness in the ridge north of the system. Hector tracked slowly northwestward, and sported a 10 to 15 nm diameter eye from 14/0900 UTC through 15/0300 UTC. The system maintained hurricane intensity until 1500 UTC on 15 Aug, at which time it weakened to tropical storm strength. A combination of southerly shear, stable air entrainment, and cooler SSTs began to take their toll on the tropical cyclone, and its deep central convection quickly collapsed. It's interesting to note that as Hector's upgrade to hurricane status coincided with its right turn, so did its downgrade to a tropical storm coincide with a left turn--also an abrupt change. The primary steering became the low-level easterlies as convection weakened rapidly; the storm was a low-level vortex with no convective activity by 0300 UTC on the 16th. Hector weakened to a depression, and the final advisory was issued the same day, at 2100 UTC on 16 Aug, with the dissipating center about 1100 nm west of Cabo San Lucas. Ship reports at this time suggested that no closed surface circulation was present. The remnants of Hector tracked westward across the Pacific and generated squally weather in the Hawaiian Islands on 20-21 Aug as they interacted with a strong upper-level trough. No casualties or damage were reported from either Hawaii or Mexico in association with Hector. *********************************************************************** NORTHWEST PACIFIC (NWP) - North Pacific Ocean West of Longitude 180 Activity for August: 2 tropical depressions ** 3 tropical storms ++ 3 typhoons 1 super typhoon ** - one of these was a short-lived system carried only by JMA ++ - one of these was treated as a tropical depression by JTWC and JMA but Mark Lander felt that it reached tropical storm intensity NOTE: Most of the information on each cyclone's history presented in the narrative will be based upon JTWC's advisories, and references to winds should be understood as a 1-min avg MSW unless otherwise noted. However, in the accompanying tracking document I have made comparisons of coordinates with JMA (Japan) and the Philippines (PAGASA) when their positions differed from JTWC's by usually 40-50 nm or more. A special thanks to Michael V. Padua, owner of the Typhoon 2000 website, for sending me the PAGASA and JMA tracks. In the title line for each storm I plan to reference all the cyclone names/numbers I have available: JTWC's depression number, the JMA-assigned name (if any), JMA's tropical storm numeric designator, and PAGASA's name for systems forming in or passing through their area of responsibility. Northwest Pacific Tropical Activity for August ---------------------------------------------- August turned out to be a very active month in the Northwest Pacific basin. Six tropical storms were named by JMA with four of these reaching typhoon intensity. Bilis became an intense super typhoon and Jelawat nearly did do (according to Mark Lander it did briefly reach super typhoon intensity). All of the named cyclones eventually made landfall on the Asian continent except for Typhoon Ewiniar. JTWC issued warnings on two additional depressions (14W and 17W), and JMA issued two bulletins on another tropical depression. However, Mark Lander sent me alternate tracks for some of the systems, and his track for TD-14W assigns a peak MSW of 50 kts. Another depression, TD-16W, formed just west of the Dateline and moved into the Northeast Pacific basin where it developed into Tropical Storm Wene. Finally, Mark Lander sent a satellite picture on 30 Aug of a very tiny vortex in the subtropics accompanied by some deep convection. It isn't exactly clear just what the nature of this "micro-midget" system was. This first installment of the August summary will cover Typhoon Jelawat, Tropical Cyclone 14W, and Typhoon Ewiniar. Typhoon Jelawat (TC-13W / TY 0008) 30 July - 11 August ----------------------------------- Jelawat: submitted by Malaysia, is the name of a freshwater carp also known as Sultan fish. This tasty fish normally inhabits large rivers and is much sought after by gourmets. Typhoon Jelawat was a far-travelled typhoon which formed in the subtropical latitudes of the Western North Pacific a few hundred miles west of Wake Island and followed a long trajectory which eventually took it inland into China south of Shanghai by way of Okinawa. The storm peaked at 125 kts--just under super typhoon intensity. According to an alternate track for the early portion of Jelawat's history sent to me by Dr. Mark Lander of the University of Guam, the typhoon did briefly reach super typhoon status at 0000 UTC on 3 Aug. Another interesting aspect of Jelawat was the huge variation in eye diameter. Early in the storm's life, during its first rapid intensification spurt, the typhoon displayed a tiny, pinhole eye as small as 3 nm in diameter at one point. By the time Jelawat was menacing Okinawa, it had developed a huge eye approximately 90 nm in diameter. The earliest mention by JTWC of the pre-Jelawat disturbance was in a STWO issued at 2200 UTC on 31 Jul. An area of convection was rapidly developing about 720 nm east-southeast of Iwo Jima. A TRMM pass at 31/1908 UTC depicted tightly-curved convective banding. The area was given a Fair development potential. However, according to Mark Lander the initial development of a circulation had occurred on 30 Jul and several hundred miles to the east. Mark's alternate track locates a weak 25-kt system about 300 nm west-northwest of Wake Island at 0000 UTC on the 30th. The disturbance moved rather steadily to the west, reaching tropical storm intensity (per Mark's track) at 31/0000 UTC when located about 875 nm east-southeast of Iwo Jima. The first JTWC warning at 0000 UTC on 1 Aug placed the center about 675 nm east-southeast of Iwo Jima with 25-kt winds whereas Mark Lander's track estimates the MSW to be 55 kts at that time. JTWC upgraded the depression to a tropical storm with 45-kt winds on the second warning (at 0600 UTC)--in Mark's opinion typhoon intensity was reached about this time. JMA officially named the cyclone Jelawat at 1200 UTC, estimating the maximum 10-min avg wind to be 35 kts. JTWC's MSW estimate was still 45 kts at 1200 UTC but was 70 kts six hours later. Mark Lander's 1200 and 1800 UTC estimates were 85 kts and 105 kts. JMA did bring Jelawat to typhoon intensity by 02/0000 UTC. This wide divergence in intensity estimates among various analysts seems to be par for the course with small, midget tropical cyclones, especially those developing in subtropical latitudes. Last August there was one instance where simultaneous satellite current intensity estimates for Typhoon Tanya ranged from 25 kts to 65 kts. There was quite a bit of e-mail discussion about this subject which the author had access to, and one likely reason for these oft-seen discrepancies (suggested by Lori Chappel at Darwin) is that the Dvorak rules were developed for normal-sized tropical cyclones and that the minimum width criteria might not necessarily be valid for midgets. Also, these midgets are capable of intensifying and weakening at very rapid rates which break the normal Dvorak constraints for changes in cyclone intensity. Last January with Tropical Cyclone Iris in the South Pacific (another midget which intensified and then weakened very rapidly), there was a great divergence between Dvorak estimates based upon various methods. Current intensity numbers based upon visible imagery analysis reached 4.0 while simultaneously the IR-derived number was 6.0 (this from a JTWC Satellite Bulletin), and objective T-numbers averaged above 6.5 for a few hours, briefly reaching 6.9 at one point. Considering the extreme danger that such small, intense systems can present to any ship or island in their paths, further research and reconnaissance of midget tropical cyclones is something which is badly needed. To return to Typhoon Jelawat--guided by ridging to its north, the developing typhoon continued to move to the west-northwest. Jelawat continued to intensify, reaching its estimated peak intensity of 125 kts (per JTWC warnings) at 0600 UTC on 3 Aug when it was located about 160 nm east of Iwo Jima. (According to Mark Lander's track Jelawat's MSW peaked at 130 kts at 03/0000 UTC.) Deep convection surrounded a tiny eye only 3-nm in diameter. The typhoon was located beneath a diffluent region generated by a HIGH to the northwest and a TUTT to the southwest. At its peak gales covered an area slightly over 200 nm in diameter while the radius of 100-kt winds was estimated to be no greater than 20 nm. (The peak 10-min avg wind value assigned by JMA was 85 kts from 0000 through 1800 UTC on 3 Aug.) After reaching its peak intensity Typhoon Jelawat weakened somewhat with the MSW dropping to 100 kts by 03/1800 UTC. (Mark's estimate was down to 95 kts at this point.) The still-intense typhoon was centered only about 25 nm northeast of Iwo Jima at this time. Jelawat had been moving on a west-northwesterly track for a couple of days, but after passing Iwo Jima the storm began to move straight toward the west just north of the 26th parallel. After passing Iwo Jima Jelawat's intensity held fairly constant in the 90-95 kt range for about the next three days as it trekked toward Okinawa. (Mark's MSW estimate was slightly higher; JMA's 10-min avg estimate held at 80 kts.) A GMS-5 visible image taken at 04/0231 UTC (sent by Roger Edson) shows concentric eyewalls in Jelawat. Roger's comments indicate that it is very unusual to see this phenonmenon in small typhoons. As the typhoon continued westward the eye diameter began to steadily increase, jumping from 29 nm at 06/0000 UTC to 56 nm six hours later. Although the diameter of the eye fluctuated some, decreasing to around 40 nm by 1200 UTC, it had increased again to 64 nm by 07/0600 UTC and to a whopping 90 nm by 1200 UTC. Gales at this time extended outward 170 nm to the northeast of the center and 120 nm elsewhere while 50-kt winds covered an area about 110 nm in diameter. Jelawat's MSW had increased to 100 kts on the 6th as the eye contracted some (Mark Lander's track estimates 110 kts), but had dropped slightly to 90 kts by 07/1200 UTC. Between 0600 and 1200 UTC on 6 Aug Typhoon Jelawat passed over the Japanese island of Minamidaito-jima, located about 180 nm east of Okinawa. A report from Masashi Nagata, a forecaster at JMA's National Typhoon Center, states that the island reported a minimum pressure of 958.9 mb at 0720 UTC. The maximum 10-min avg wind of 75.4 kts was measured at 0920 UTC, and a peak gust of 119.5 kts was recorded at 0913 UTC. The report states that sea level pressure series at the island indicated very steep pressure gradients in a narrow ring just outside the large eye with almost uniform pressure within the eye. As Jelawat approached Okinawa on 7 Aug the storm turned to a north- westerly course which it followed for a couple of days. As early as 07/0000 UTC gale-force winds were being felt on Okinawa. Convective tops warmed some on 7 Aug and the MSW had dropped to 80 kts by the time Jelawat had moved over the northeastern end of the island around 1800 UTC. At 07/1200 UTC a ship approximately 100 nm to the southeast of the center was reporting 10-min mean south-southwest winds of 39 kts. By 1800 UTC the huge eye was positioned over the northeastern end of Okinawa and was tracking northwestward at 6 kts. Jelawat by this time had moved north of the upper-level ridge and into an area of increased vertical shear. The 50-kt wind radii had been adjusted outward to over 100 nm due to the enormous eye, and gales now covered an area exceeding 300 nm in diameter. Mark Lander passed along a report from the small island of Okinoerabu north of Okinawa. At 08/0100 UTC winds were from the southeast at 71 kts (presumably a 10-min avg), gusting to 92 kts with a pressure of 980 mb. Mark indicated that none of the wind reports from Okinawa had been all that high--Kadena had had a peak gust of 68 kts. A press report received by the author mentioned winds to 80 kts on Okinawa, but it is unknown whether this was measured or estimated nor whether it represents a sustained wind or a peak gust. Typhoon Jelawat continued to move slowly northwestward for a couple of days after passing Okinawa; then, as a mid-level ridge over China strengthened, the storm turned back to a westerly course which it followed until it made landfall in China. The intensity held steady at 80 kts (per JTWC's warnings) through 8 Aug, then increased to 90 kts for about 12 hours on the 9th as deep convection increased in the northeastern quadrant. (JMA's 10-min avg wind estimate had dropped to 70 kts on 8 Aug and did not reflect this short-term strengthening.) The eye diameter remained large but not quite as large as when the typhoon passed over Okinawa. As Jelawat approached the Chinese coast it encountered increasing vertical shear south of the subtropical ridge axis and slowly began to weaken. Landfall occurred near Shipu, about 130 nm south-southeast of Shanghai, around 1200 UTC on 10 Aug. The storm was a minimal typhoon with 65-kt winds per JTWC's warnings; JMA estimated the maximum 10-min mean winds near 50 kts at landfall. The weakening storm turned to the north-northwest after landfall and the final JTWC warning on Jelawat at 11/0600 UTC placed the dissipating depression's center about 150 km west of Shanghai. The effects of Typhoon Jelawat appeared to be minimal on Okinawa and in China. On Okinawa two children were injured, and 19,000 homes were without electrical power, mainly in the northern city of Nago. The author has located no reports of injuries or fatalities in China as a result of the typhoon. The primary impact seems to have been disruption of traffic and closure of airports and shipping ports. Jelawat's large eye was very unusual but not unprecedented. In August, 1996, Typhoon Kirk passed directly over Okinawa with an eye diameter in excess of 70 nm. The eye required 12 hours to pass over the island. Also, 1996 typhoons Orson and Violet had at some point in their evolution eye diameters on the order of 75 nm. However, all these eyes pale in comparison with that of Typhoon Carmen in 1960. Like Kirk and Jelawat, Typhoon Carmen passed over Okinawa. The Annual Typhoon Report for 1960 states that photographs taken from a radar at Kadena AB show quite clearly that, with respect to wall clouds surrounding the eye, Carmen's eye had a diameter of approximately 200 nm. (The information in this paragraph was taken from Eastern Hemisphere Tropical Cyclones of 1996 by Mark Lander, Eric Trehubenko and Chip Guard, although the author has somewhere in a box buried in a closet the typhoon summary for 1960 (as published in Climatological Data, National Summary) which describes Carmen's gargantuan eye.) Tropical Cyclone (TC-14W) 6 - 12 August -------------------------- This system was carried as a tropical depression by JTWC and JMA, but an alternate track provided by Dr. Mark Lander assigns tropical storm intensity to the system coincident with the time span it was in warning status from JTWC; hence, the designation above as a generic tropical cyclone. Mark's track begins a couple of days prior to the issuance of the first JTWC warning, locating a weak 20-kt circulation about 650 nm east-southeast of Iwo Jima--very near the location where Jelawat had reached typhoon intensity six days earlier. The system moved northwestward for a couple of days and slowly became better organized. During the morning of 7 Aug (local time) a MCS which had been associated with the disturbance collapsed, but a new one formed late in the day and covered the LLCC, as a visible image taken at 07/0730 UTC shows. Maximum winds were estimated near 30 kts at this time (per Mark's track). An enhanced infrared image taken also at 0730 UTC reveals the small cyclone with Typhoon Jelawat to the west and a monsoon depression (which developed into Typhoon Ewiniar) to the south-southeast. Early on 8 Aug the small system began to curve to the north. A visible image taken at 08/0130 UTC reveals a partially-exposed center due to some shearing. JTWC issued a Formation Alert about this time, followed by the first warning at 0600 UTC on the 8th. The depression was located about 300 nm north-northeast of Iwo Jima at this time and also roughly 850 nm east of Typhoon Jelawat. This location was essentially the point of recurvature for TC-14W--it did jog slightly to the north-northwest for awhile on 8 Aug, but soon turned to a north- northeasterly course and later to an east-northeasterly one. JTWC assigned a MSW of 25 kts while Mark Lander believes the disturbance reached minimal tropical storm intensity about this time. A visible image taken at 0630 UTC reveals a partially-exposed LLCC with deep convection sheared about 10 nm to the northeast. Animated water vapor imagery indicated that the system was located at the southern end of a mid-latitude trough. JTWC increased the MSW estimate to 30 kts at 1800 UTC where it remained for the duration of the period the system was in warning status. A visible image taken at 08/2330 UTC revealed that the center was either under or along the southeastern side of a tiny CDO with good banding evident. The 09/0000 UTC warning from JTWC reported that animated satellite imagery depicted weakening of the system although it mentioned that the LLCC had moved beneath the convection. The 0600 UTC warning noted that there had been an increase in convection during the previous six hours. Mark estimates that the peak intensity of 50 kts was reached at this time with fairly rapid weakening there- after. By 09/1200 UTC the cyclone was moving around the top of a ridge to its southeast and was approaching an old frontal boundary. The final JTWC warning at 10/0000 UTC indicated that the deep convection associated with the system was sheared over 60 nm to the east of the LLCC and the depression was deemed extratropical. Mark, however, contends that the system did not become extratropical but rather moved quickly to the east-northeast as a weak, sheared tropical cyclone. His track continues to follow the weakening system through 0000 UTC on 12 Aug at which time it was located about 1200 nm north of Wake Island. Typhoon Ewiniar (TC-15W / TY 0009) 9 - 19 August ----------------------------------- Ewiniar: submitted by the Federated States of Micronesia, is the name of a Chuuk traditional storm god In contrast with Typhoon Jelawat which formed near the northern edge of the tropics, was initially a midget cyclone, and intensified very rapidly, Typhoon Ewiniar formed deeper in the tropics, was initially very large in areal extent, and intensified more slowly. The storm formed near the Mariana Islands, moved generally northward to a point a few hundred miles south of Japan, then moved on an east-northeastward heading for several days, finally turning back to the north as it slowly weakened east of northern Honshu. The first mention of the disturbance from which Ewiniar developed was in a STWO issued by JTWC on 6 Aug. An area of convection had developed about 600 nm east of Guam. Convection was persistent but unorganized and there was an indication of a weak LLCC just to the west of some isolated deep convection. The disturbed area moved steadily to the west and by 8 Aug was centered approximately 150 nm east of Guam. The area had the appearance of a large monsoon depression with light winds near the center. A scatterometer pass indicated the possibility of multiple LLCCs. A Formation Alert was issued at 0251 UTC on 9 Aug, indicating that a large monsoon gyre had formed near the Mariana Islands. Upper-level analysis indicated that an anticyclone aloft was providing good outflow over the area. The first JTWC warning was issued on TD-15W at 09/0600 UTC with the depression's center roughly 200 nm west-northwest of Guam. The system intensified rather slowly initially under weak to moderate north- easterly vertical shear. JMA upgraded the depression to Tropical Storm Ewiniar at 1800 UTC, and JTWC followed suit at 10/0000 UTC when the center was located about 375 nm west of Saipan in the Marianas. Satellite intensity estimates were 30-35 kts and there were some synoptic ship reports of pressures to 996 mb. Organization had improved with some deep convection near the LLCC. At 10/0600 UTC a SSM/I pass depicted a partially-exposed, elongated LLCC with convection primarily south of the center. An ERS2 scatterometer pass indicated an extensive area of gale-force winds south and east of the system. By this time Ewiniar was moving to the north-northwest, a motion which continued for a couple of days due to the steering influence of a subtropical ridge to the east-northeast of the cyclone. The JTWC warning at 11/0000 UTC mentioned that some tight convective banding had appeared, and outflow in the northwestern sector was improving as an upper-level LOW to the northwest shifted to the south- west along the Ryukyu Island chain. The MSW was increased to 50 kts, and six hours later JTWC upgraded Ewiniar to a typhoon with 65-kt winds when it was located approximately 200 nm west-northwest of Iwo Jima. The storm was moving north-northwestward very quickly at 29 kts, but this rapid forward motion soon began to subside very quickly. At 12/0000 UTC Ewiniar's center had become fully-exposed and the system was downgraded to a 55-kt tropical storm. An upper-level LOW to the southwest and an upper-level HIGH to the southeast had combined to create an enhanced vertical shear environment. The 0000 UTC warning also required a relocation of the center to a point about 90 nm south of the previous forecast position. (This location was approximately 450 nm southwest of Tokyo.) By 0600 UTC the MSW had dropped further to 45 kts and Ewiniar was moving to the east-northeast at 4 kts. (It should be noted that JMA did not upgrade Ewiniar to a typhoon at this point, with the maximum 10-min avg winds being estimated at 55 kts. However, JMA maintained the 10-min avg winds at 50-55 kts during the next couple of days when JTWC had dropped their reported MSW value to 45 kts.) By 1200 UTC on 12 Aug the upper-level LOW to the southwest of the tropical storm had moved farther to the west and an anticyclone was building to the north of the system; thus, the vertical shear began to lessen. Satellite intensity estimates were primarily 35 kts on the 12th, but based upon some synoptic ship reports of winds to 40 kts, the MSW remained at 45 kts. For the next couple of days Ewiniar was steered by a subtropical ridge to its southeast on a fairly brisk east-northeasterly course, passing about 250 nm south of Tokyo around 0600 UTC on the 13th. A 13/1123 UTC TRMM pass indicated that a deep convective band had formed to the southeast of the system. By 14/1200 UTC the storm was still maintaining its 45-kt intensity (JMA's 10-min avg winds remained at 50 kts) and was forecast to soon begin weakening since it appeared to be moving into an increasingly unfavorable vertical shear environment. However, the warning for 14/1200 UTC did mention that a new band of deeper convection was developing in the northeastern quadrant. Then at 1800 UTC--surprise! Ewiniar had moved under a region with good upper-level diffluence and had developed a 13-nm diameter eye. So the storm was upgraded to a 65-kt typhoon centered about 390 nm east of Tokyo. Six hours later the MSW estimate was upped to 75 kts based upon satellite intensity estimates of 77 kts. The forward motion had slowed somewhat as a mid-latitude ridge to the northeast of the typhoon had strengthened some. At 15/0600 UTC JMA upgraded Ewiniar to a typhoon. The storm's ragged eye at this time was 20 nm in diameter, and had increased to 30 nm six hours later. Ewiniar's northeastward motion came to a halt around 1800 UTC, and by 16/0000 UTC the typhoon was moving northward at around 7 kts. Water vapor imagery indicated that southwesterly vertical shear was impinging on the storm and an eye was no longer visible in satellite imagery. Although outflow in the northern and northeastern sectors seemed to improve somewhat, the shearing took its toll and Ewiniar was downgraded to a tropical storm at 16/1200 UTC by both JTWC and JMA. The weakening storm became caught in a region of weak steering flow and drifted very slowly generally in a northerly direction for the next few days, remaining quasi-stationary at times. Animated satellite imagery revealed a tightly-wrapped LLCC with usually sparse weak convection. JTWC dropped the MSW to 40 kts at 16/1800 UTC and to minimal tropical storm intensity of 35 kts at 17/1200 UTC. JMA's 10-min mean winds were generally about 10 kts higher than JTWC's MSW during this period. The storm continued to slowly spin down due to the effects of moderate vertical shear and cooler SSTs. By 1200 UTC on the 18th there was no longer any convection associated with the system and JTWC downgraded Ewiniar to a depression as it drifted slowly northwestward southeast of Hokkaido. The final warning issued by JTWC at 19/0600 UTC indicated that based on upper-air analysis and satellite imagery, Ewiniar appeared to be an occluded LOW along a weak frontal boundary and hence extratropical, and was drifting southeastward. JMA still reported the winds at 40 kts, but downgraded the storm to 30 kts and issued their final bulletin at 1800 UTC. *********************************************************************** NORTH INDIAN OCEAN (NIO) - Bay of Bengal and Arabian Sea Activity for August: 1 tropical depression ** ** - system was briefly mentioned as a depression by IMD only *********************************************************************** SOUTHWEST INDIAN OCEAN (SWI) - South Indian Ocean West of Longitude 90E Activity for August: 1 tropical disturbance ** ** - this system was treated as a minimal tropical storm by JTWC The primary sources of information upon which the narrative is based are the warnings issued by the TCWC on La Reunion Island, associated with Meteo France, and which is the RSMC for the Southwest Indian Ocean basin. However, cyclones in this region are named by the sub-regional centres on Mauritius and Madagascar with longitude 55E as the dividing line between their respective areas. La Reunion only advises these centres regarding the intensity of tropical systems. References to sustained winds should be understood as meaning a 10-min averaging period unless otherwise stated. In the accompanying tracks file some position comparisons have been made with JTWC's positions, and warnings from JTWC were used as a source of 1-min avg MSW estimates. Also, the comments about satellite imagery and other sources of data such as SSM/I and TRMM were obtained for the most part from the JTWC warnings. Southwest Indian Ocean Activity for August ------------------------------------------ Weaker tropical depressions or disturbances are not all that uncommon in the South Indian Ocean during the winter months. A tropical depression occurred in that area in July, 1998, and there were a couple of systems the following September. In early August of this year a system gained enough organization that the La Reunion TCWC issued bulletins for a couple of days. JTWC also issued warnings on the disturbance. This first installment of the August summary includes a report on Tropical Disturbance #1 (TC-01S per JTWC's nomenclature) . For naming purposes the tropical cyclone season in the Southwest Indian Ocean runs from 1 August through 31 July. Names for the 2000-2001 tropical cyclone season are: Ando Jakoba Suzy Bindu Kiran Tovo Charly Lanto Ursula Dera Mathieu Vimla Evariste Nancy Wenda Francois Oda Xino Gaby Premnath Yul Hans Quirin Zoe Idriss Rakoto Tropical Disturbance (TC-01S / MFR #1) 1 - 3 August --------------------------------------- An area of convection had developed by early on 1 Aug about 400 nm east-northeast of Diego Garcia. Satellite imagery depicted an increase in areal coverage of deep convection and a partially-exposed LLCC east of the convection. A QuikScat swath indicated stronger winds over the western half of the system which was moving slowly westward beneath 30-40 kt easterlies. The La Reunion TCWC (MFR) began issuing bulletins on the system as Tropical Disturbance #1 at 01/0600 UTC. The maximum central 10-min avg winds were estimated at 25 kts, but localized winds to gale force were forecast in the southern quadrant due to the pressure gradient with the subtropical HIGH to the south. By 1800 UTC the system's organization had improved to the point that JTWC began issuing warnings. A 01/1313 UTC QuikScat pass indicated 20-30 kt winds on the western side of the system, so the initial warning intensity was set at 35 kts--minimal tropical storm intensity. The system was centered about 320 nm east-northeast of Diego Garcia at the time. Located north of a subtropical ridge, the disturbance moved slowly in a general westerly direction through 02/1200 UTC, then began to track southwestward at an increased pace as a mid-latitude trough created a weakness in the steering ridge. Satellite intensity estimates reached 45 kts from at least one agency, but the system remained in a moderate vertical shear environment throughout its life and JTWC maintained 35 kts as the warning intensity. MFR's bulletins continued to report the maximum 10-min avg wind as 25 kts near the center, though as indicated earlier, some stronger winds were forecast for the southern periphery of the system. The final JTWC warning, issued at 1200 UTC on 3 Aug, indicated that a LLCC could not be found in satellite imagery, so the system was downgraded. MFR also issued their final bulletin at the same time. While MFR classified the system no higher than a tropical disturbance and JTWC treated it as a minimal tropical storm, in reality this does not represent as great a difference as may be supposed. It is simply due to a delta of one-half T-number on the Dvorak scale in combination with the difference between wind averaging periods. While satellite intensity estimates available to JTWC ranged from T2.0 (30 kts) to T3.0 (45 kts), the various forecasters utilized an average value of T2.5; i.e., 35 kts in terms of a 1-min avg MSW. Bulletins from MFR clearly state that they used a Dvorak rating of T2.0 for the disturbance, equivalent to a 26-kt 10-min mean wind. MFR procedures require that a system have 10-min mean winds exceeding 28 kts in order to be classified as a tropical depression, so that category is reserved for systems to which the agency assigns a T2.5 rating on the Dvorak scale. Out-of-season tropical cyclones are not common in the South Indian Ocean, but moreso than in the Atlantic basin. A tropical depression formed near 85E in August of 1996, and tropical depressions formed in July in both 1997 and 1998. (This is per MFR's classification-- JTWC carried these systems as tropical storms.) Based upon JTWC's database, August is the least active month for the Southern Hemisphere as a whole with only two tropical cyclones (34 kts or higher) forming over the past twenty seasons. During the 1996-1997 tropical cyclone season in the Southern Hemisphere a storm formed in every month, beginning with Lindsay in July in the Perth AOR and ending with Keli the following June in the South Pacific. It should be pointed out that JTWC, Australia and Fiji consider the tropical cyclone year to run from 1 July through the following 30 June, whereas La Reunion defines their season as 1 August through the following 31 July. In fact Philippe Caroff, Chief Forecaster at La Reunion, indicated in an e-mail that they were following the system described above on 31 July, but since it was weak, postponed initiating advisories until the date rolled over so it would be the first numbered disturbance of the new cyclone season. (Some of the above information was taken from tables of Southern Hemisphere tropical cyclone seasonal statistics compiled by Patrick Hoareau and based upon JTWC's database.) *********************************************************************** NORTHWEST AUSTRALIA/SOUTHEAST INDIAN OCEAN (AUW) - From 90E to 135E Activity for August: No tropical cyclones *********************************************************************** NORTHEAST AUSTRALIA/CORAL SEA (AUE) - From 135E to 160E Activity for August: No tropical cyclones *********************************************************************** SOUTH PACIFIC OCEAN (SPA) - South Pacific Ocean East of Longitude 160E Activity for August: No tropical cyclones *********************************************************************** EXTRA FEATURE In order to shorten the amount of typing in preparing the narrative material, I have been in the habit of freely using abbreviations and acronyms. I have tried to define most of these with the first usage in a given summary, but I may have missed one now and then. Most of these are probably understood by a majority of readers but perhaps a few aren't clear to some. To remedy this I developed a Glossary of Abbreviations and Acronyms which I first included in the July, 1998 summary. I don't normally include the Glossary in most months in order to help keep them from being too long. If anyone would like to receive a copy of the Glossary, please e-mail me and I'll be happy to send them a copy. *********************************************************************** AUTHOR'S NOTE: This summary should be considered a very preliminary overview of the tropical cyclones that occur in each month. The cyclone tracks (provided separately) will generally be based upon operational warnings issued by the various tropical cyclone warning centers. The information contained therein may differ somewhat from the tracking and intensity information obtained from a "best-track" file which is based on a detailed post-seasonal analysis of all available data. Information on where to find official "best-track" files from the various warning centers will be passed along from time to time. The track files are not being sent via e-mail. They can be retrieved in the following manner: (a) FTP to: hrd-type42.nhc.noaa.gov [140.90.176.206] (b) Login as: anonymous (c) For a password use your e-mail address (d) Go to "data" subdirectory (Type: cd data) (e) Set file type to ASCII (Type: ascii) (f) Transfer file (Type: get remote_file_name local_file_name ) (The files will be named with an obvious nomenclature--using August as an example: aug00.tracks) (g) To exit FTP, type: quit Both the summaries and the track files are standard text files created in DOS editor. Download to disk and use a viewer such as Notepad or DOS editor to view the files. The first summary in this series covered the month of October, 1997. If anyone wishes to retrieve any of the previous summaries, they may be downloaded from the aforementioned FTP site at HRD. The summary files are catalogued with the nomenclature: aug00.sum, for example. Back issues can also be obtained from the following websites (courtesy of Michael Bath, Michael V. Padua, Tom Berg, Michael Pitt, and Rich Henning): OR Another website where much information about tropical cyclones may be found is the website for the UK Meteorological Office. Their site contains a lot of statistical information about tropical cyclones globally on a monthly basis. The URL is: TROPICAL CYCLONE REPORTS AVAILABLE I have discovered that JTWC now has available on its website the complete Annual Tropical Cyclone Report (ATCR) for 1999 (1998-1999 season for the Southern Hemisphere). Also, ATCRs for earlier years are available also. The URL is: Also, TPC/NHC has available on its webpage nice "technicolor" tracking charts for the 1999 Atlantic and Eastern North Pacific tropical cyclones; also, preliminary storm reports for all the 1999 Atlantic and Eastern North Pacific cyclones are now available. The URL is: Prepared by: Gary Padgett E-mail: garyp at alaweb.com Phone: 334-222-5327 (nights & weekends) / 850-882-2594 (weekdays) *********************************************************************** *********************************************************************** +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Marguerite Long" To: Subject: Re: aus-wx: gold coast storm Date: Tue, 17 Oct 2000 15:27:45 +1000 X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi John, That explains it. I like this list. Thank you, Marguerite ----- Original Message ----- From: John Woodbridge To: Sent: Tuesday, October 17, 2000 1:00 AM Subject: RE: aus-wx: gold coast storm > Hi Marguerite, > > The lightning tracker only shows Cloud-Ground strikes (CG's), and much of > what you can see are cloud-cloud (CC's - not chips :)), which it doesn't > record. I also can see the activity from Mt. Crosby. > > Regards, > John. > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Originating-IP: [210.215.8.9] From: "Clare Moylan" To: aussie-weather at world.std.com Subject: aus-wx: where's spring? Date: Tue, 17 Oct 2000 15:28:26 EST X-OriginalArrivalTime: 17 Oct 2000 05:28:26.0064 (UTC) FILETIME=[12F37D00:01C037FB] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com heya everyone! i was just wondering, what happened to spring this year?? a couple of days ago here in canberra, it was minus one overnight!! its absolutly freezing and its supposed to be spring already!! we are a month or so into spring yet there have only been a few spring days!! it still feels like winter here to me!! cya's from clare _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "David Findlay" To: Subject: RE: aus-wx: Cell near Beaudesert (& other storms) Date: Tue, 17 Oct 2000 16:25:23 +1000 X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com http://www.theweather.com.au/public/cgi-bin/public.pl?_product=IDR503.gif This looks interesting. A cell near Ipswitch looks like it has hail. Also I notice that it looks a bit like a hook echo, is it? Does anyone have links to good docs on using radar? David -----Original Message----- From: aussie-weather-approval at world.std.com [mailto:aussie-weather-approval at world.std.com]On Behalf Of James Chambers Sent: Tuesday, 17 October 2000 2:41 PM To: aussie-weather at world.std.com Subject: Re: aus-wx: Cell near Beaudesert (& other storms) Hi David and all Yes it was a storm cell. This has weakened of course but there are many other showers and low top weak thunderstorms around the place. The better cells are likely to have hail because of the cold air above us. Last night Brisbane had a 500mb temp of -17C and a 350mb temp of -40C and today at 00z these were almost exactly the same. Both of these are much colder than normal at these levels. Talking about last night, the storms that Anthony experienced at Southport moved and propagated NNE along the SE Qld Coast. For those in Brisbane who didn't see it, you certainly missed a pretty good lightshow. I took about 8mins of video and tried my hand at some lightning pics with my SLR, but several times as soon as I shut the shutter an awesome CG would pop out the side of the storm. Doh! Onto other storms, a nice line of intense storms are currently situated over Western SA - there is a Severe Weather Advice for these. They look best on satpics: http://www.npmoc.navy.mil/satimages/gmsd.jpg Anyway that's all from me. Regards James Chambers www.qldstorms.com >Looks like a storm cell near Beaudesert, SE-QLD. It is on the Marbug Local >Scale radar. > >David +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: chris.nitsopoulos at jcu.edu.au X-Authentication-Warning: brutus.jcu.edu.au: nobody set sender to jc124783 at jcu.edu.au using -f To: aussie-weather at world.std.com Subject: Re: aus-wx: Possible early start to the Monsoon season Date: Tue, 17 Oct 2000 16:56:45 +1000 (EST) User-Agent: IMP/PHP IMAP webmail program 2.2.3 X-Originating-IP: 203.21.231.224 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi everyone While you are all loving the activity lately down south and out west, here in Townsville we seem to be in the worst area as we are too far North (by about 200-300kms) For these trough systems to effect us and too far South for those storms in the far northern tropics. Hopefully with the Monsoon pushing South earlier we could get some storm activity a little sooner than expected. I can't say that I'm surprised by the prediction below as Convective acticity has been going through the roof up North for this time of year. All inland Queensland and Northern Territory temperatures are above average and have been for the past 2 months. Also I was wondering, does anyone know why The Perth cyclone warning centre offers outlooks for the Central Indian ocean but not for the North West in October? I would've thought that with sea temps already above 26 degrees the potential is definately there for cyclones to develop anywhere in that Indian Ocean. CHEERS : CHRIS NITSOPOULOS > > This is from the BOM today: > > << The RSMC region* is still in an active phase of the 30-60 day > (Madden-Julian) > ISO. Over the last week time-longitude series and OLR images from NOAA > indicate that broad areas of enhanced convection have intensified, and > extended > further eastward and southward of the equator. During the week a > cyclonic > storm > formed in the Bay of Bengal. Upper level (200 hPa) velocity potential > series show > westward propagation of the velocity potential maximum. Station pressure > series > from the four tropical locations are in coherent mode supporting the > current ISO > pattern. > > The 30-60 day ISO has had a period of around 50 days. If this > periodicity > continues, the next enhanced pulse of convection will move into RSMC > area > during the third week of November, with the possible formation of the > monsoon > trough in the southern hemisphere. > > Over the eastern parts of the RSMC region a weak low level circulation > formed > north of the equator late in the week, and to the south of the equator > southeasterly > non convergent flow and suppressed convection persisted through the > week>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Paul Mossman" To: Subject: Re: aus-wx: Possible early start to the Monsoon season Date: Tue, 17 Oct 2000 18:15:28 +1000 X-Mailer: Microsoft Outlook Express 5.00.2919.6600 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Chris, I would say that Perth BOM would not issue Outlooks etc for NW WA yet, as the monsoon trough is still too far North. The NW Coast needs the trough for cyclogenesis and the dragging down of moisture. The Heat trough provides plenty of instability, but with those Highs coming through there would be way too much shear for any development yet. Once the trough slips South, those Highs likewise slip South and take the shear with them. Then we wait!! Rgds, Paul. ----- Original Message ----- From: To: Sent: Tuesday, October 17, 2000 4:56 PM Subject: Re: aus-wx: Possible early start to the Monsoon season > Hi everyone > While you are all loving the activity lately down south and out > west, here in Townsville we seem to be in the worst area as we are too far > North (by about 200-300kms) For these trough systems to effect us and too far > South for those storms in the far northern tropics. Hopefully with the Monsoon > pushing South earlier we could get some storm activity a little sooner than > expected. I can't say that I'm surprised by the prediction below as Convective > acticity has been going through the roof up North for this time of year. All > inland Queensland and Northern Territory temperatures are above average and > have been for the past 2 months. Also I was wondering, does anyone know why The > Perth cyclone warning centre offers outlooks for the Central Indian ocean but > not for the North West in October? I would've thought that with sea temps > already above 26 degrees the potential is definately there for cyclones to > develop anywhere in that Indian Ocean. > CHEERS : CHRIS NITSOPOULOS > > > > > This is from the BOM today: > > > > << The RSMC region* is still in an active phase of the 30-60 day > > (Madden-Julian) > > ISO. Over the last week time-longitude series and OLR images from NOAA > > indicate that broad areas of enhanced convection have intensified, and > > extended > > further eastward and southward of the equator. During the week a > > cyclonic > > storm > > formed in the Bay of Bengal. Upper level (200 hPa) velocity potential > > series show > > westward propagation of the velocity potential maximum. Station pressure > > series > > from the four tropical locations are in coherent mode supporting the > > current ISO > > pattern. > > > > The 30-60 day ISO has had a period of around 50 days. If this > > periodicity > > continues, the next enhanced pulse of convection will move into RSMC > > area > > during the third week of November, with the possible formation of the > > monsoon > > trough in the southern hemisphere. > > > > Over the eastern parts of the RSMC region a weak low level circulation > > formed > > north of the equator late in the week, and to the south of the equator > > southeasterly > > non convergent flow and suppressed convection persisted through the > > week>> > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "bussie" To: Subject: Re: aus-wx: aussie frost... Date: Tue, 17 Oct 2000 18:45:21 +1000 X-Mailer: Microsoft Outlook Express 5.50.4133.2400 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com So in reality we'd have to put all our instruments on the ground, and then it' should read zero. But at four feet above ground anything 2.2C and below is a frost? Answers another one of my thoughts. I've got one on the wall out the back from grass level to eye level. My weather station sensor is a little higher than eye level and the house is about 2-3 feet (and some) above the ground, hence one showed 2 this morning and the sensor showed 5.1? Bussy ----- Original Message ----- From: "David Jones" To: "Aussie Weather Digest (E-mail)" Sent: Tuesday, October 17, 2000 9:23 AM Subject: aus-wx: aussie frost... > In Aus. my understanding is that a screen level minimum of 36F or 2.2C, is > commonly used to denote "frost". This dates from the report "Frost is the > Australian Region" by Foley in 1945 - a rather interesting read. > Interestingly, Foley writes "There is nothing fundamental about the > definition... it merely serves as a basis for comparison of conditions > approximating frost." > > Certainly, the definition worked in Box Hill last night where we had 1.4C > and lots of frost. In fact the garden was whiter this morning than on any > morning during winter. > > Regards, > > David. > > Dr David Jones > > Climate Analysis Section > National Climate Centre > Bureau of Meteorology Fax : (+61 3) 9669 4678 > GPO Box 1289K, Melbourne Ph (work): (+61 3) 9669 4861 > Victoria 3001, Australia Ph (home): (+61 3) 9898 4425 > email : D.Jones at bom.gov.au > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: chris.nitsopoulos at jcu.edu.au X-Authentication-Warning: brutus.jcu.edu.au: nobody set sender to jc124783 at jcu.edu.au using -f To: aussie-weather at world.std.com Subject: aus-wx: Re:Perth BOM cyclone outlooks and extreme weather in the North last few seasons Date: Tue, 17 Oct 2000 17:57:24 +1000 (EST) User-Agent: IMP/PHP IMAP webmail program 2.2.3 X-Originating-IP: 203.21.231.224 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hey Paul,and everyone My point I think is being mistaken. The Perth BOM is already issuing Central Indian Ocean cyclone forecasts( since late September). Why exactly is the BOM issuing forecasts for that region and not for the North Western section Of WA. I believe that a High would have the potential to shear away any system no matter where it develops. Also to prove cyclones can occur in the Central Indian Ocean anytime check out Carl Smiths August Cyclone Summary where a disturbance developed in that area. That was absolutely amazing. Another interesting fact up here in NQ is that our 1997, 98, 99 and 2000 wet seasons have far exceeded what is normally expected, monsoons have been extreme and have begun about two to three weeks early. Generally we expect the trough around Mid to late December around the tip of Cape York and Darwin region, but the past few years It was there around late November. Once again this season is shaping up similar to the last few. Could this be the start of a longer and harsher monsoon season for Australia due to Global Climatic Change? I'm very interested in peoples thoughts. > Hi Chris, > > I would say that Perth BOM would not issue Outlooks etc for NW WA yet, > as > the monsoon trough is still too far North. The NW Coast needs the trough > for > cyclogenesis and the dragging down of moisture. The Heat trough provides > plenty of instability, but with those Highs coming through there would > be > way too much shear for any development yet. Once the trough slips South, > those Highs likewise slip South and take the shear with them. > > Then we wait!! > > > > Hi everyone > > While you are all loving the activity lately down south > and > out > > west, here in Townsville we seem to be in the worst area as we are too > far > > North (by about 200-300kms) For these trough systems to effect us and > too > far > > South for those storms in the far northern tropics. Hopefully with the > Monsoon > > pushing South earlier we could get some storm activity a little sooner > than > > expected. I can't say that I'm surprised by the prediction below as > Convective > > acticity has been going through the roof up North for this time of > year. > All > > inland Queensland and Northern Territory temperatures are above > average > and > > have been for the past 2 months. Also I was wondering, does anyone > know > why The > > Perth cyclone warning centre offers outlooks for the Central Indian > ocean > but > > not for the North West in October? I would've thought that with sea > temps > > already above 26 degrees the potential is definately there for > cyclones to > > develop anywhere in that Indian Ocean. > > CHEERS : CHRIS NITSOPOULOS > > > > > > > > This is from the BOM today: > > > > > > << The RSMC region* is still in an active phase of the 30-60 day > > > (Madden-Julian) > > > ISO. Over the last week time-longitude series and OLR images from > NOAA > > > indicate that broad areas of enhanced convection have intensified, > and > > > extended > > > further eastward and southward of the equator. During the week a > > > cyclonic > > > storm > > > formed in the Bay of Bengal. Upper level (200 hPa) velocity > potential > > > series show > > > westward propagation of the velocity potential maximum. Station > pressure > > > series > > > from the four tropical locations are in coherent mode supporting > the > > > current ISO > > > pattern. > > > > > > The 30-60 day ISO has had a period of around 50 days. If this > > > periodicity > > > continues, the next enhanced pulse of convection will move into RSMC > > > area > > > during the third week of November, with the possible formation of > the > > > monsoon > > > trough in the southern hemisphere. > > > > > > Over the eastern parts of the RSMC region a weak low level > circulation > > > formed > > > north of the equator late in the week, and to the south of the > equator > > > southeasterly > > > non convergent flow and suppressed convection persisted through the > > > week>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Tue, 17 Oct 2000 19:28:28 +1000 From: Keith Barnett X-Mailer: Mozilla 4.6 [en] (Win95; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Frost? Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com If that's the case then we are getting down to official observing guidelines (I don't have a copy of the Bureau's handbook). In other words I think you are saying , from an official standpoint, the temperature must be zero to record a frost. But see Jimmy's response to this thread as well..I don't see how an official observer could report in and say '...well, there's all this white stuff on the ground, the screen temp is about 4 degrees, and I'm sure it's not the manna that fell from heaven in the desert, so what do you want me to call it?' As far as zero temp. goes, I find no frost occurs here (I'm 83 metres above sealevel) until the grass minimum gets down below minus 1 deg C, and then it has to be sustained at that level for at least 15 minutes before even the slightest trace of frost begins to form on the thermometer bulb (the thermometer slopes slightly downwards). +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Tue, 17 Oct 2000 19:34:22 +1000 From: Keith Barnett X-Mailer: Mozilla 4.6 [en] (Win95; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Possible early start to the Monsoon season Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com In the past ,those Bengal Bay storms have been known to shear lots of cloud off in the jet stream down to Australian latitudes. Given the current (and predicted) succession of thundery rain troughs we seem to be getting, the latest Bay storm's cloud system might be worth a watch.... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Tue, 17 Oct 2000 19:35:41 +1000 From: Keith Barnett X-Mailer: Mozilla 4.6 [en] (Win95; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Re: ...the trough over WA + funky li'l orange cloud Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Might have been a noctilucent cloud... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Authentication-Warning: neumann.maths.monash.edu.au: robert owned process doing -bs Date: Tue, 17 Oct 2000 19:44:15 +1100 (EST) From: Robert Goler X-Sender: robert at neumann.maths.monash.edu.au To: aussie-weather at world.std.com Subject: aus-wx: REPORT: Photos of "Did anyone else see this at ~6pm today....?" Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I finally had my photos developed of that line of cumulus congestus that went through Melbourne on the 7th of Oct. The system that went through is here: 18:02 - http://www.maths.monash.edu.au/~robert/Pictures/2000/Oct/07Oct01.jpg Then at 18:08 - the thing just to the right of centre... http://www.maths.monash.edu.au/~robert/Pictures/2000/Oct/07Oct02_1.jpg ...moves northward with the cloud... http://www.maths.monash.edu.au/~robert/Pictures/2000/Oct/07Oct03_1.jpg http://www.maths.monash.edu.au/~robert/Pictures/2000/Oct/07Oct04_1.jpg With my lack of knowledge regarding storm features, I originally called this a funnel, and Andrew McDonald replied with what he saw, below. On Sun, 8 Oct 2000, McDonald wrote: > I noticed this band of cumulus congestus and the updrafts were very crisp. > Two areas along this line seemed to punch a little higher than the rest. > One I would guess to have been either just over the CBD or just N of the CBD > and the other was probably over the inner western suburbs. At a guess i'd > say the tops could've hit 18-20000ft. Also of note yesterday was the strong > shear in the lowest 6km of the atmosphere (at that time). Surface winds > were from 240 degrees (SW) at about 20knts, 700mb winds were 280 degrees > (WSW) at about 50knts and 500mb winds (~6km) were from 340 degrees at > 80knts. As you can see there is 100 degrees of directional shear and 60knts > of speed shear. I don't know if this would have anything to do with it but > it could. The radar at the time actually pulsed into the "pink" > (40-100mm/h) briefly. > My other photos from October can be seen here: http://www.maths.monash.edu.au/~robert/Pictures/2000/Oct/october_pictures.html Cheers -- Robert A. Goler E-mail robert at mail.maths.monash.edu.au http://www.maths.monash.edu.au/~robert/ Department of Mathematics and Statistics Monash University Clayton, Vic 3800 Australia -- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ Date: Tue, 17 Oct 2000 22:00:10 +1000 From: Jane ONeill X-Mailer: Mozilla 4.5 [en] (Win95; I) X-Accept-Language: en To: Aussie-wx Subject: aus-wx: Dry slot Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Evening all, What is causing this amazing dry slot in central SA? - I can't find any corresponding cause at 600hPa or above, or does it mark the back end of the trough or the poleward edge of the subtropical jet? http://207.133.112.37/gms5/austwv.jpg Look forward to your thoughts - because I'm rather lost on this one. Jane -------------------------------- Jane ONeill - Melbourne cadence at stormchasers.au.com Melbourne Storm Chasers http://www.stormchasers.au.com ASWA - Victoria http://www.severeweather.asn.au -------------------------------- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Dean Sgarbossa" To: Subject: Re: aus-wx: That answers that Date: Tue, 17 Oct 2000 22:10:56 +1000 X-Mailer: Microsoft Outlook Express 5.00.2615.200 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Nathan and David, I myself have been looking around for affordable personal lightning detectors or construction plans. I must say I am extremely interested in this area. Nathan, I would be interested in viewing the plans for the "sferics" (atmospheric electromagnetic radiation) device you hold possession of. Is it on the web? Keep up the great work! Cheers, Deano ----- Original Message ----- From: Nathan French To: Sent: Tuesday, October 17, 2000 1:34 PM Subject: RE: aus-wx: That answers that > Thank for that web adress, I will take a look at it, > If you like I have some other plans for a sferics (atmospheric > electromagnetic radiation) device. > Thanks again.. > Nathan > Wangaratta Vic. > > -----Original Message----- > From: aussie-weather-approval at world.std.com > [mailto:aussie-weather-approval at world.std.com]On Behalf Of David Findlay > Sent: Tuesday, 17 October 2000 11:57 > To: aussie-weather at world.std.com > Subject: RE: aus-wx: That answers that > > > >HI all, > >David, Would it be ok if i got a copy of the plans for that detector, > >It would be greatly welcome. > >Nathan French > >Wangaratta. Vic > > Hello > > I don't actually have paper plans for it but the plans are on the web at: > http://bub2.meteo.psu.edu/default.htm > > The unit they have got is quite large, but based on what the Professor in > charge has told me a unit half the size should still have a range of at > least 200km. Also the magnetic field plate on top can be replaced with a > vertical whip antenna. > > If you decide to build one, please keep in contact with me. I am planning to > start mine later this year when I get time. We can share control software > and information on getting the units working. > > This unit also only requires one detector not a whole group of them. > > David > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Ben Quinn" To: Subject: aus-wx: Pics (was Cell near Beaudesert (& other storms) ) Date: Tue, 17 Oct 2000 22:04:43 +1000 X-Mailer: Microsoft Outlook Express 5.50.4133.2400 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Everyone, I sent an email to this list this morning, but it hasn't come through yet - hopefully this one makes it After sleeping through last nights lightning show, i was eager for some action today. Some BRILLIANT early morning congestus in Moreton bay raised my hopes, but it was frustrating when i couldn't get down to the beach in time to photograph them at their peak (it was all short lived, but it really was quite spectacular). Vertical development continued throughout the morning, becoming very junky at one stage, but Cb's began developing inland by afternoon. From my location most of these were unphotogenic, or just too far away. During the late afternoon some very large (though soft) congestus developed around my location, and a trip to my lookout was in order. By the time i got there the sky had literally exploded with fantastic and quite photogenic congestus and a large Cb to my WSW. It has been a long time since i have seen updrafts like the ones pictured below in a SE airstream - normally the tops on our coastal showers/CJ's are ordinary, and it's the base features/precip curtains that stand out. http://www.bsch.simplenet.com/products/recent-events-gallery/2000/17-10.html Probably the best/strongest updrafts are the ones at the bottom. The Brisbane sounding shows quite unstable mid to lower levels, with 700mb LI's well into the negatives - but what stood out to me was the more gradual than normal warming above about 700mb (which is fast becoming my favourite setup in these conditions). Normally with SE winds there is quite a sharp mid level inversion, and the vertical develop hits this with the tops spreading out and become quite junky. This afternoon the updrafts were slowing down once they reached a certain height, but were retaining a nice shape instead of spreading out. I am far from an expert on these matters, but that is my 2c worth ----- Original Message ----- From: "James Chambers" To: Sent: Tuesday, October 17, 2000 2:41 PM Subject: Re: aus-wx: Cell near Beaudesert (& other storms) > Hi David and all > > Yes it was a storm cell. This has weakened of course but there are many > other showers and low top weak thunderstorms around the place. The better > cells are likely to have hail because of the cold air above us. Last night > Brisbane had a 500mb temp of -17C and a 350mb temp of -40C and today at 00z > these were almost exactly the same. Both of these are much colder than > normal at these levels. > > Talking about last night, the storms that Anthony experienced at Southport > moved and propagated NNE along the SE Qld Coast. For those in Brisbane who > didn't see it, you certainly missed a pretty good lightshow. I took about > 8mins of video and tried my hand at some lightning pics with my SLR, but > several times as soon as I shut the shutter an awesome CG would pop out the > side of the storm. Doh! > > Onto other storms, a nice line of intense storms are currently situated over > Western SA - there is a Severe Weather Advice for these. They look best on > satpics: http://www.npmoc.navy.mil/satimages/gmsd.jpg > > Anyway that's all from me. > > Regards > James Chambers > www.qldstorms.com > > > > >Looks like a storm cell near Beaudesert, SE-QLD. It is on the Marbug Local > >Scale radar. > > > >David > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > with "unsubscribe aussie-weather your_email_address" in the body of your > message. > -----------------------jacob at iinet.net.au------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Ben Quinn" To: Subject: aus-wx: Steve Baynhams Lightning Pictures Date: Tue, 17 Oct 2000 22:48:50 +1000 X-Mailer: Microsoft Outlook Express 5.50.4133.2400 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Everyone, Steve had to run off to work, so he asked me to send these to the list for him - some cool shots in here! These were all taken last night http://www.bsch.simplenet.com/pictures/steve/16-10-200005.html http://www.bsch.simplenet.com/pictures/steve/16-10-200004.html http://www.bsch.simplenet.com/pictures/steve/16-10-200003.html http://www.bsch.simplenet.com/pictures/steve/16-10-200002.html http://www.bsch.simplenet.com/pictures/steve/16-10-200001.html And also a Cg from the October 10 storm http://www.bsch.simplenet.com/pictures/steve/10-10-200001.html +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------