From: "bussie" To: Subject: aus-wx: lightning theory Date: Thu, 27 Jul 2000 06:56:26 +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
Just read this from one of those newsletter/joke type emails. Any thoughts?
 
What causes lightning?

A new experiment may cause scientists to re-think their theories
on what causes lightning, according to the New York Times.
Lightning occurs when particles of frozen water collide with ice
crystals inside large clouds, generating positive and negative
electrical charges, which separate within the cloud -- the
negative charges moving downward and the positive charges upward
-- and form a lightning bolt. But the data from the project
suggest that the layers of charged particles are sometimes
reversed, with positive charges sinking to lower regions, says
Paul Krehbiel, a researcher at the New Mexico School of Mines and
Technology. A surprising number of storms also produced an
accompanying "positive to ground" form of lightning, in which
positive charges rush to the ground and cause a reverse flow of
negative charges -- an effect opposite of typical lightning
strikes. Krehbiel says such lightning strikes tend to be more
powerful, and may be more common than had been realized. "Storms
may reverse their polarity all the time, but we just never knew
it," he said.

Bussy
 
 From: "The Weather Co." To: Subject: Re: aus-wx: Snow arrival? Date: Thu, 27 Jul 2000 07:58:08 +1000 X-Mailer: Microsoft Outlook Express 5.00.2314.1300 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Looks like coldest air is passing through now. Snowfalls will ease later this morning with the arrival of drier air. ____________________ The Weather Company Level 2, 7 West Street North Sydney 2060 Phone: (02) 9955 7704 Fax: (02) 9955 1536 twc at theweather.com.au ----- Original Message ----- From: Lindsay To: Sent: Thursday, July 27, 2000 9:00 AM Subject: aus-wx: Snow arrival? > Blackheath Wednesday 6:45pm EST: > > Hi all, > > > Do any folk know the rough timing of the coldest air tonight/tomorrow > for the Central Tablelands? Any thoughts on the moisture availability > for our area? > > Thanks, > > > Lindsay > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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: "Pearce" To: Subject: aus-wx: Snowchase Date: Thu, 27 Jul 2000 08:19:48 +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 all I am going up to the Blue Mountains today on a snow chase. It looks very good and I shouldn't have to go too far as I don't want to get stranded up there. I am heading up the Great Western Highway and Jimmy is going up the Bells Line of Rd. Hopefully between us, we should cover the Blue Mountains! Anyway, updates would be greatly appreciated on 0417685086 - especially in terms of road closures or potential for road closures in subsequent hours. Thanks Matthew +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: jdeguara at pop.ihug.com.au X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Date: Thu, 27 Jul 2000 08:14:08 +1000 To: aussie-weather at world.std.com From: Jimmy Deguara Subject: aus-wx: Snow chasing Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi folks, Another great day awaits. I like the timing of the cold air and the main moisture line. It shows on the water vapour imagery, the satellite shows action to the west but a little risky for those including myself going to work tomorrow. So we are chasing as far west as it is safe to do so - most probably Mt Tomah. Nothing like snow in the rain forest. My phone 0408020468 please make phone calls brief and especially for the road block information and also see what is happening of course we shall tell you. Mario's phone 0409924338 Cya later thanks Jimmy Deguara +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: cold in Melbourne Date: Thu, 27 Jul 2000 08:29:08 +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 >Coldest air arriving in the central part of the state atm.. Mt Dandenong >1.6C!!!!!! 100% humidity - soft hail? or snow?? anyone listening to the >radio??? - please confirm. Certainly was snow but don't know how much - I have a good friend who lives near Mt Dandenong who should have an eye-witness report this morning. BTW got lots of small hail last night at our place (Box Hill ~100m) with temperature near 3C for most of the night (minimum 2.8C). The 7pm ob was an impressive (for our altitude) 3.5C with rain/hail at the time. With overnight temperatures of ~3C and dewpoints of ~1C, I would not be surprised if there was sleet or even some snow mixed in during the night, but was unable to tell because we have such bad outdoors lighting... The thickness hit ~526 gpdm last night in Melbourne which is a good "rule-of-thumb" cut-off for possible snow flurries to sea level, so I wouldn't be surprised to hear of some very low reports. Cheers, 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------------------------------ Date: Thu, 27 Jul 2000 08:29:24 +1000 From: David Carroll X-Mailer: Mozilla 4.7 [en] (Win98; I) X-Accept-Language: en To: Aussie Weather Subject: aus-wx: Snow Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com 8.30am 27/07 Snow on Mt Panorama in Bathurst this morning. Only a light cover though. All roads open at this stage in Bathurst area. Dave +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: aus-wx: lightning theory (fwd) To: aussie-weather at world.std.com (Australian Severe Weather Association) Date: Wed, 26 Jul 2000 17:52:28 -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 Bussie and other folks, > > What causes lightning? > The following is a semi-mindless regurgitation of what someone knowledgeable just tried to explain to me: Two mechanisms for charge separation: (1) Non-Inductive Charge Separation: Two ice/graupel particles of different fall speeds collide with each other while collecting liquid water droplets (which produces some fancy surface layer on the hydrometeor). Depending on parameters such as ambient temperature, liquid cloud water content and liquid cloud water droplet size distribution the charge transfer between the two hydrometeors can be negative or positive. (2) Inductive Charge Separation: Now an ambient electric field is present polarizing all hydrometeors. Two particles approaching each other vertically would face each other with charges of the opposite sign. When colliding, part of one particle could freeze onto the other thus transfering a charge, for example. The collision of a liquid and a solid hydrometeor would permit the longest contact time and thus the strongest charge transfer. The non-inductive charge separation is usually active before the inductive counterpart, as the earth's fair weather electric field is not strong enough to contribute to the inductive mechanism. After a while of non-inductive charge separation the charged frozen hydrometeors build up an enhanced electric field strong enough to make the inductive charge separation a significant process. I think the article below refers to the STEPS experiment; see http://www.mmm.ucar.edu/community/steps.html for details. Cheers, Harald > A new experiment may cause scientists to re-think their theories > on what causes lightning, according to the New York Times. > Lightning occurs when particles of frozen water collide with ice > crystals inside large clouds, generating positive and negative > electrical charges, which separate within the cloud -- the > negative charges moving downward and the positive charges upward > -- and form a lightning bolt. But the data from the project > suggest that the layers of charged particles are sometimes > reversed, with positive charges sinking to lower regions, says > Paul Krehbiel, a researcher at the New Mexico School of Mines and > Technology. A surprising number of storms also produced an > accompanying "positive to ground" form of lightning, in which > positive charges rush to the ground and cause a reverse flow of > negative charges -- an effect opposite of typical lightning > strikes. Krehbiel says such lightning strikes tend to be more > powerful, and may be more common than had been realized. "Storms > may reverse their polarity all the time, but we just never knew > it," he said. > -- ------------------------------------------- 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------------------------------ Date: Thu, 27 Jul 2000 09:47:35 -0700 From: Lindsay X-Mailer: Mozilla 3.0 (Win16; I) To: aussie-weather at world.std.com Subject: aus-wx: Upper Blue Mountains Snow Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Blackheath: Thursday 9:45am Persistant light snow since aroud 8am this morning, not settling. Temp 0.5 Wet bulb -0.5 Light westerly At around 10pm last night, I measured between 1.5 to 2cm of settled snow before the wind ate into it. Only patchy snow on ground now. Hills out Oberon way are pretty white though. Hope this colder air comes through, could be good. Lindsay Pearce. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: nzts.nz at pop3.caverock.net.nz X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.3 (32) Date: Thu, 27 Jul 2000 12:59:59 +1200 To: aussie-weather at world.std.com From: John Gaul Subject: Re: aus-wx: Lightning Over the Southern Alps #2 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com At 22:37 26/07/00 +1000, you wrote: >Do you ever get Winter thunderstorms from the west in Christchurch. I am >thinking that if Wollongong is rainshadowed by 800m ranges, well >Christchurch must be well and truly shadowed from the west. > >Michael > Not particulaly. Any thunder related activity along the Alps usually stays there or drifts north. Summer time we do get the occasional 'drift-over' but not very often. On the whole, we don't seem to get the alpine thunderstorms like what we used to get and the last 2 nights have been something of a rareity in this day and age. John Gaul NZ Thunderstorm Society > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: [141.132.128.10] From: "Leslie Baxter" To: aussie-weather at world.std.com Subject: Re: aus-wx: Snow reported to sea level..... Date: Wed, 26 Jul 2000 18:07:12 PDT Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com snowed here yesterday at 1:30pm. Short Snow shower from Ca/Cb. >From: "MSC - Jane ONeill" >Reply-To: aussie-weather at world.std.com >To: >Subject: aus-wx: Snow reported to sea level..... >Date: Wed, 26 Jul 2000 14:12:39 +1000 > >Snow reported to sea level in Tasmania & snow has been reported below 500m >across the Dividing Range in Victoria. It was 6C in the city a little >while >ago & is 1.9C on Mt Dandenong. > >Jane > >--------------------------------------- >Jane ONeill >ASWA - Victoria >http://www.severeweather.asn.au > >Melbourne Storm Chasers >http://www.rubix.net.au/~cadence >--------------------------------------- > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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------------------------------ ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.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: [141.132.128.10] From: "Leslie Baxter" To: aussie-weather at world.std.com Subject: RE: aus-wx: Victorian low Date: Wed, 26 Jul 2000 18:05:46 PDT Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com thanks very much people, ok maybe I'm just dreaming, bout time Balalrat had a decent storm, no fair! been probably hmmm 5 months since I seen lightning. must just be too cold for Cbs with the flash and bang to develop round these parts. Not enough thermal. >From: "MSC - Jane ONeill" >Reply-To: aussie-weather at world.std.com >To: >Subject: RE: aus-wx: Victorian low >Date: Wed, 26 Jul 2000 13:38:15 +1000 > >Leslie, > >The Bureau of Meteorology's lightning detection system detected many >strikes >in the NE of Victoria during yesterday afternoon, and the location and time >is consistent with Clyve's observations. This system of distance estimation >has proved to be incredibly accurate in the past, & Andrew McDonald & I >both >heard lightning static on the AM radio too - so I don't think there was any >dreaming going on. > >Jane >--------------------------------------- >Jane ONeill >ASWA - Victoria >http://www.severeweather.asn.au > >Melbourne Storm Chasers >http://www.rubix.net.au/~cadence >--------------------------------------- > >-----Original Message----- >From: aussie-weather-approval at world.std.com >[mailto:aussie-weather-approval at world.std.com]On Behalf Of Leslie Baxter >Sent: Wednesday, 26 July 2000 9:40 >To: aussie-weather at world.std.com >Subject: Re: aus-wx: Victorian low > > >Clyve, > >I don't know what part of Vic your in, but ugh geelong is like 80kms away >and no lightning here, fact I don't think there was any lightning wiht the >whole system, full stop! > >Stop dreaming! > > > > >From: "clyve herbert" > >Reply-To: aussie-weather at world.std.com > >To: > >Subject: Re: aus-wx: Victorian low > >Date: Tue, 25 Jul 2000 03:06:30 +1000 > > > >Hi everybody > > > > Lightning discharge rate at 1500hrs within 100 to 150k of Geelong >up > >to > >4to8 per min anybody make a fix. > > Clyve h > >----- Original Message ----- > >From: MSC - Jane ONeill > >To: Aussie Weather > >Sent: Tuesday, July 25, 2000 1:49 PM > >Subject: aus-wx: Victorian low > > > > > > > A low of 998 analysed sitting over the SW corner of the state at 10am, > > > pressure in Melbourne atm is 1000hPa, temperature 11.8C, wind still >out > >of > > > the NNE. Pressure at Warrnambool is 996hPa. Isolated storms forecast > >for > > > the far SW of Victoria - anyone heard any sparks yet? > > > > > > The change in the Skew-t from last night for Melbourne is very telling >- > > > nice deep moist layer between 600 & 400hPa > > > http://www.bom.gov.au/products/reg/IDS65024/IDS65024.shtml > > > > > > Click on the button for Melbourne > > > > > > username: bomw0007 > > > password: aviation > > > > > > > > > > > > Jane > > > --------------------------------------- > > > Jane ONeill > > > ASWA - Victoria > > > http://www.severeweather.asn.au > > > > > > Melbourne Storm Chasers > > > http://www.rubix.net.au/~cadence > > > soon to be > > > http://www.stormchasers.au.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------------------------------ ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.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: [210.8.232.3] From: "Patrick Tobin" To: aussie-weather at world.std.com Subject: aus-wx: Canberra sleet/snow Date: Thu, 27 Jul 2000 01:41:01 GMT X-OriginalArrivalTime: 27 Jul 2000 01:41:01.0469 (UTC) FILETIME=[B84404D0:01BFF76B] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com At 11.30am in Barton (a lower inner southern suburb of Canberra) a mix of rain and sleet (with some larger flakes mixed in). Reports of a more solid mix from some higher area of town. Here is the great forecast just issued for Canberra at 11.30am: A.C.T. FORECAST: For the rest of today and Friday Cold and cloudy with periods of snow this afternoon and evening, clearing later tonight then a fine day tomorrow. Moderate west winds, tending southerly tonight then light variable winds tomorrow. Patrick ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.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: "MSC - Jane ONeill" To: Subject: aus-wx: Snow in NSW Date: Thu, 27 Jul 2000 11:36:41 +1000 X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Morning all, Snow has been falling south of Queanbeyan for the past hour or so. Heavy enough flurries now to reduce visibility and settle on the ground. Timber decks are colvered - temeperature ranging between 3 & 5C from Tuggeranong to the Airport with 0C at Tidbinbilla - will someone please take pics!!!!! In Melbourne there was some sleet at around 7am in the eastern suburbs, the rain drops have been occcasionally 'heavy' (ie: ex-ice, still looking for a suitable description)...the one's that have almost totally melted but there's still a component of ice in there Jane --------------------------------------- Jane ONeill ASWA - Victoria http://www.severeweather.asn.au Melbourne Storm Chasers http://www.rubix.net.au/~cadence --------------------------------------- +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: paisley at mail.cobweb.com.au Date: Thu, 27 Jul 2000 11:38:02 +0930 To: aussie-weather at world.std.com From: Phil Bagust Subject: Re: aus-wx: Hello all Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com >Hello everyone, I have been sitting quietly on this list for a couple of >months now and thought it was time to introduce myself to everyone. My >name is Matthew Bonser and I live in the southern suburbs of Adelaide, I am >very interested in the weather, especially anything severe. I have a >fairly limited technical knowledge but with I am slowly increasing that, >especially with the wealth of information that is availabe through this >email list and on the web. >Anyway enough about me, the main reason I wanted to post a message was to >tell everyone about the great dumping of hail we received here today. It >lasted for about 15 minutes and although only pea size, it managed to turn >everything white and covered the road with ice. Luckily I was able to get >some vision of it happening and some of you in SA might have seen it on the >news tonight. Hi Matt! Welcome to the list and to the small band of SA weather idiots! yes, I saw your footage on the teev, very impressive, esp considering we had not a jot of hail at St Peters in spite of the cold. Make sure you contact Andrew Wall [SA ASWA rep and a frequent poster to this list] for info about the local group's meetings. You could be very handy if we get a supercell this summer! Heh heh.... ___________________________________________________________________________ Phil 'Paisley' Bagust - paisley at cobweb.com.au Paisley's Playpen at http://www.chariot.net.au/~paisley2 "Nothing matters anymore, not even the fact that nothing matters" L. Grossberg ___________________________________________________________________________ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: "The Weather Co." To: "Maillist Weather doods" Subject: aus-wx: Brisbane, Gold Coast chill out Date: Thu, 27 Jul 2000 14:36:24 +1000 X-Mailer: Microsoft Outlook Express 5.00.2314.1300 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com 2pm temperatures in Brisbane and Gold Coast are as low as I remember seeing at 7 degrees. If it gets much colder surely we'll be hearing reports of snow on the hinterland to the west. Mark ____________________ The Weather Company Level 2, 7 West Street North Sydney 2060 Phone: (02) 9955 7704 Fax: (02) 9955 1536 twc at theweather.com.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-Authentication-Warning: neumann.maths.monash.edu.au: robert owned process doing -bs Date: Thu, 27 Jul 2000 14:48:37 +1000 (EST) From: Robert Goler X-Sender: robert at neumann.maths.monash.edu.au To: aussie-weather at world.std.com Subject: aus-wx: Spillane eddy over Melbourne this morning?????? Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi all Can anyone shed some light on this one? I live one floor from the top of a 12 storey building in Clayton (about 20km SE of Melbourne CBD) and my view is to the west. This morning was the second morning where I noticed the smoke from neighbouring smoke stacks blowing southward, while on the west side of the bay, the smoke from those smoke stacks was blowing to the north. Looking at the MSL analysis and the cumulus cloud motions showed a southerly flow present, although this was barely noticeable at ground level as I walked to uni. Q. I was wondering if this caused by the effects of the Spillane eddy? (Er, this is a cyclonic circulation centered on Melbourne bound by the ranges to the north and east and west, and forms under stable conditions. Bob Crowder's book shows a satellite image of this and mentions it briefly in the section on air pollution.) Or is it simply caused by the geography of my area? At the moment, I'm trying to get a hold of an elevation map of the region here, as I'm not quite sure where everything is. Incidently, this cannot be explained by wind shear in the vertical as the sounding doesn't show this dramatic 180 degree turn. I should point out that smoke stacks to the south showed no east-west deviation, and seemed to be blowing away, while those to the north-northwest also had no east-west deviation, but due to their distance, I was unable to say for certain that these were blowing towards me. I indirectly got in touch with the BoM, but they say that the southerly flow was too fast for the Spillane eddy to form. The first time I saw this was on June 27 in the morning, which had a very similar synoptic situation over Victoria. It was quite noticeable around 9 through to about 10am, but by 10:30, the smoke stacks on this side became erratic in nature, and eventually adopted a northward flow, thus matching the western side and the synoptic pattern. This would be explained by convective heating breaking this 'eddy'. I took photos showing the opposing motions of the smoke stack, but the lack of contrast made the smoke stack in the distance invisible in the scan. However, it can be seen well in the prints. So, does anyone have an idea? 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: Thu, 27 Jul 2000 15:07:17 +1000 From: Anthony Cornelius X-Mailer: Mozilla 4.72 [en] (Win98; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Brisbane, Gold Coast chill out Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Mark, I've had a max of 11.7C today...been hovering around 10C most of the day, clearing edge of this cloud band seems to be coming through soon, so maybe we'll get higher temps then...still iffy! What's the lowest recorded max in Brisbane? I was under the impression it was about 13.4C...but can't remember! Talking to the BoM, sleet has been reported in Springbrook (QLD) around midday today!!! I'm seriously considering going down to Stanthorpe tonight/o'night...but I have to see how I go with uni (inconvieniently tonight), and work. This frozen Brisbanite is signing out... Anthony Cornelius "The Weather Co." wrote: > > 2pm temperatures in Brisbane and Gold Coast are as low as I remember seeing > at 7 degrees. If it gets much colder surely we'll be hearing reports of snow > on the hinterland to the west. > Mark > ____________________ > The Weather Company > Level 2, 7 West Street > North Sydney 2060 > Phone: (02) 9955 7704 > Fax: (02) 9955 1536 > twc at theweather.com.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------------------------------ -- 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: wbc at ozemail.com.au (Laurier Williams) To: aussie-weather at world.std.com Subject: Re: aus-wx: Snow reported to sea level..... Date: Thu, 27 Jul 2000 05:13:27 GMT X-Mailer: Forte Agent 1.5/32.452 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id BAA25757 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com On Wed, 26 Jul 2000 18:07:12 PDT, "Leslie Baxter" wrote: >snowed here yesterday at 1:30pm. >Short Snow shower from Ca/Cb. > > Sorry, Leslie -- where is "here"? Laurier +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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 Yole" To: Subject: Re: aus-wx: Snow reported to sea level..... Date: Thu, 27 Jul 2000 15:39:33 +1000 Organization: ASWA Victoria 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 Ballarat Laurier..............or at least I'm assuming. ----- Original Message ----- From: Laurier Williams To: Sent: Thursday, July 27, 2000 3:13 PM Subject: Re: aus-wx: Snow reported to sea level..... > On Wed, 26 Jul 2000 18:07:12 PDT, "Leslie Baxter" > wrote: > > >snowed here yesterday at 1:30pm. > >Short Snow shower from Ca/Cb. > > > > > Sorry, Leslie -- where is "here"? > > Laurier > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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: [210.8.232.3] From: "Patrick Tobin" To: aussie-weather at world.std.com Subject: Re: aus-wx: Snow reported to sea level..... Date: Thu, 27 Jul 2000 06:40:40 GMT X-OriginalArrivalTime: 27 Jul 2000 06:40:40.0535 (UTC) FILETIME=[949FC670:01BFF795] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Yes my sister reported snow in Ballarat around lunch time yesterday. This was also picked up in yesterday's BOM notes for Victoria. Patrick > >Ballarat Laurier..............or at least I'm assuming. >----- Original Message ----- >From: Laurier Williams >To: >Sent: Thursday, July 27, 2000 3:13 PM >Subject: Re: aus-wx: Snow reported to sea level..... > > > > On Wed, 26 Jul 2000 18:07:12 PDT, "Leslie Baxter" > > wrote: > > > > >snowed here yesterday at 1:30pm. > > >Short Snow shower from Ca/Cb. > > > > > > > > Sorry, Leslie -- where is "here"? > > > > Laurier > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > 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------------------------------ > ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.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: "Michael Thompson" To: Subject: aus-wx: Rain in Wollongong Date: Thu, 27 Jul 2000 17:23:41 +1000 X-Mailer: Microsoft Outlook Express 5.00.2014.211 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Just starting to rain here in Wollongong and only 10C. On my rough scale that is cold enough for snow at Robertson. Michael Thompson http://thunder.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: [210.8.232.4] From: "Patrick Tobin" To: aussie-weather at world.std.com Subject: aus-wx: Canberra show over Date: Thu, 27 Jul 2000 07:27:57 GMT X-OriginalArrivalTime: 27 Jul 2000 07:27:57.0863 (UTC) FILETIME=[2FCDAB70:01BFF79C] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com At 4.30pm the sky is clearing over Canberra. Despite the great promise of the 11.30 BOM forecast, we received only a few sleet/snow/rain showers (mostly a simultaneous mix of each precipitation type). These generally cleared from about 1pm as the cold pool drifted north. Unfortunately nothing settled anywhere in Canberra that I could see (or photograph) including Mt Ainslie at 812m. The northward drift of the cold pool was clear to see on the satpics. The temperature variations between Canberra and and Goulburn have also shown the passage of the cold pool. At 0600z the temp in Canberra was 6; while in Goulburn 100km to the NNE and at similar elevation, it was 2. (A similar disparity was evident between Canberra and Cooma around lunchtime (ie with Canberra several degrees cooler than Cooma despite Cooma's slightly higher elevation). The show is now pretty well over other than for some monster frosts to come over the next few days. By the way there were numerous minor car accidents this morning around Canberra due to black ice - with police closing a number of suburban roads during the morning peak. Patrick ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.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: "clyve herbert" To: Subject: Re: aus-wx: Brisbane, Gold Coast chill out Date: Thu, 27 Jul 2000 05:37:17 +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 Anthony >From memory the lowest max for Brisbane is 10.3c but i cant remember the date can anyone add most likely occurred under similar conditions to today ie lots of mid level stuff and colder lower surface flow witch may have been helped along by isothermal conditions last night also the natural cooling effect of large scale evaporation if light rain was falling from the mid layers regards Clyve H ----- Original Message ----- From: Anthony Cornelius To: Sent: Thursday, July 27, 2000 3:07 PM Subject: Re: aus-wx: Brisbane, Gold Coast chill out > Hi Mark, > > I've had a max of 11.7C today...been hovering around 10C most of the > day, clearing edge of this cloud band seems to be coming through soon, > so maybe we'll get higher temps then...still iffy! What's the lowest > recorded max in Brisbane? I was under the impression it was about > 13.4C...but can't remember! > > Talking to the BoM, sleet has been reported in Springbrook (QLD) around > midday today!!! I'm seriously considering going down to Stanthorpe > tonight/o'night...but I have to see how I go with uni (inconvieniently > tonight), and work. > > This frozen Brisbanite is signing out... > > Anthony Cornelius > > "The Weather Co." wrote: > > > > 2pm temperatures in Brisbane and Gold Coast are as low as I remember seeing > > at 7 degrees. If it gets much colder surely we'll be hearing reports of snow > > on the hinterland to the west. > > Mark > > ____________________ > > The Weather Company > > Level 2, 7 West Street > > North Sydney 2060 > > Phone: (02) 9955 7704 > > Fax: (02) 9955 1536 > > twc at theweather.com.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------------------------------ > > -- > 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------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: wbc at ozemail.com.au (Laurier Williams) To: aussie-weather at world.std.com Subject: aus-wx: A snowy drive up the Great Divide Date: Thu, 27 Jul 2000 07:45:03 GMT X-Mailer: Forte Agent 1.5/32.452 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id DAA13176 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Quite an interesting drive from Bairnsdale to Blackheath yesterday. I left Bairnsdale at 11am. The front had come through around 2am with gusty winds, and there was a fresh west to SW flow with fairly innocuous skies during the morning, but a good pall of cloud with trailing snow showers northwards over the mountains. I turned north onto the Bonang Highway at Orbost. Patchy rain turned to snow about 20km south of Bonang at an elevation of about 500m as I began climbing Brown Mountain, and was lying 1 or 2cm deep by 700m. I took the Bendoc road to Delegate which climbs to around 950m and stays between 900 and 950m until north of Bendoc. Heavy snow fell during the climb and for a while along the top, with 4 or 5cm lying and the natural dirt road starting to get a tad squidgy. One gully full of tree ferns, with every frond outlined in snow, looked unbelievably beautiful. Just a dusting of snow farther NE towards Bendoc as the stream dried out, but some very impressive snow curtains hanging from shallow Cu. The drive up the Monaro Hwy from around Michelago to Queanbeyan was entertaining for the cloud activity along the Brindabellas. Flat topped Cu -- almost Sc -- of no great depth sat on the mountain tops with purple/grey curtains of snow falling from them, turning brilliant white as they ballooned out from under the cloud into the clear air. Some of the more active elements within this cloudmass were breaking off and drifting east. The nearer hills (east of the Murrumbidgee) were quite white at the same elevation as the highway, sheltered from sun by their own shadows and, presumably, the nearly stationary cloud layer. Coming up the western side of Lake George, I ran into one of the detached shower cloud complexes -- just an amorphous murk of gray and white with no way of picking cloud from precipitation. It turned out to be large spotted rain with little bits of ice in it (which Jane has had problems naming, but which I would call sleet.) This gloom continued until I stopped for a healthy Maccas at Goulburn. I resumed my northward journey about 6.30pm, just after a heavy shower had left the streets of Goulburn streaming. Just north of town, the Taralga road was damp, with dry patches in the shelter under trees -- clearly no heavy showers here. My recollections of the forecast charts had a very tight thermal gradient over this area for later in the evening, so that I suspected I was on the edge of the main body of advancing cold air, and figured the rest of the journey would likely be uneventful. North of Taralga, the road rises slightly to 900 to 950m and runs NW along a narrow ridge before dropping into the Abercrombie River valley. Just after the Wombeyan Caves turn off at Richlands I became aware that the roadside had become snowy, and soon after ran into heavy falling snow, large flakes billowing across the road in the headlights dropping visibility to 20m. This continued for about 5km as I crawled along at 40km/h on low beam, and then suddenly -- I thought -- it stopped. It took me a few seconds to realise that, though the snow had stopped, the precipitation had not. It had simply turned to rain, pure blooded rain with not a trace of ice in it. I've never seen this happen, and I'm still trying to fathom the physics of it, but large-flaked wettish snow turned to rain in the horizontal space of 50 to at most 100m. There was no variation in altitude. Any thoughts from the snow cognoscenti? After the drop down to ~600m at Abercrombie River, the road climbs steeply back to ~900m, then gradually rises to 1200m in Gurnang State Forest. and stays between 1120 and 1220m until shortly before Oberon. Snow fell heavily and continuously as soon as I got to around 900m, with patchy but thick fog making driving a real treat. Without the red and white side post reflectors, I doubt if any progress would have been possible, but I managed to maintain 30 to 40km/h. The road was now completely snow covered to a depth of 2 or 3cm, with a full snow cover beside the road probably around 5 to 8cm. This section of the road is gravel, and traction was no problem -- a quick prod on the brakes every 500m or so to check for skid was as effective as it would have been in the dry. After about half an hour, I began to do some calculations. I had not passed a car since well before Taralga, there were no tyre tracks in the snow, and I was approaching the point of no return, where snow accumulation behind me would cut out retreat as an option. Continue or turn back? My gut reaction was that, although the snowfall appeared to be continuous, I was travelling with the showers, prolonging their apparent duration, and the accumulation at any point would therefore not be great. The sudden transition earlier from snow to rain I put down to the sort of turbulent mixing that would occur around shower edges, justifying the assumption that, despite appearances, things would get no worse. I ran out of the falling snow just before Black Springs, and continued through lying snow on the road into Oberon. The town was quite spectacular, with floodlights from the paper mill north of town filling the low cloudbase with an orange glow that in turn reflected off the total, though relatively thin, ground cover of fresh snow. It was about 8.30, and the pub was emptying out early, so I waited while half a dozen utes and 4WDs headed east, clearing a nice passage through the snow, then followed. No more falling snow, but a continuous snow cover through to Lowther and Good Forest, then nothing down through the River Lett valley, but more light snow by the roadside from near the top of Victoria Pass through to home at Blackheath around 10pm. The most memorable part of the trip was undoubtedly the 45 minutes or so spent driving through thick, falling snow south of Black Springs -- with some trepidation as to whether I'd made the right decision to continue. This snow was completely dry, so that windscreen wipers were not necessary, and the kaleidoscope of large flakes, twisting and writhing in gusts and lulls in the wind, was mesmerising. And as a rally-driving experience, I'd rate it 10/10. Laurier +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: "clyve herbert" To: Subject: Re: aus-wx: Spillane eddy over Melbourne this morning?????? Date: Thu, 27 Jul 2000 06:02:00 +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 Robert >From my limited study of this phenomenon the Spillane eddy requires the positioning of an anticyclone towards the south of Victoria and a low level east flow pattern the development though appears rather complex and may be associated with complicated katabatic effects across the Port Phillip bay area ie the mean katabatic flow over northern parts of the bay is usually from a north direction but on the west side of the bay mostly from a west or north west angle the easterly flow may also be enhanced by channelling through the Latrobe valley area , what you saw may have been a local katabatic effect with the distant stacks just above the low level cold outflow boundary layer i have seen this effect at the shell refinery corio where the highest stack moves from an east direction and lower stacks from a west direction in early morning situations its all interesting stuff regards Clyve H ----- Original Message ----- From: Robert Goler To: Sent: Thursday, July 27, 2000 2:48 PM Subject: aus-wx: Spillane eddy over Melbourne this morning?????? > > Hi all > > Can anyone shed some light on this one? > > I live one floor from the top of a 12 storey building in Clayton (about > 20km SE of Melbourne CBD) and my view is to the west. This morning was the > second morning where I noticed the smoke from neighbouring smoke stacks > blowing southward, while on the west side of the bay, the smoke from > those smoke stacks was blowing to the north. Looking at the MSL analysis > and the cumulus cloud motions showed a southerly flow present, although > this was barely noticeable at ground level as I walked to uni. > > Q. I was wondering if this caused by the effects of the Spillane eddy? > (Er, this is a cyclonic circulation centered on Melbourne bound by the > ranges to the north and east and west, and forms under stable conditions. > Bob Crowder's book shows a satellite image of this and mentions it briefly > in the section on air pollution.) > > Or is it simply caused by the geography of my area? At the moment, I'm > trying to get a hold of an elevation map of the region here, as I'm not > quite sure where everything is. Incidently, this cannot be explained by > wind shear in the vertical as the sounding doesn't show this dramatic 180 > degree turn. > > I should point out that smoke stacks to the south showed no east-west > deviation, and seemed to be blowing away, while those to the > north-northwest also had no east-west deviation, but due to their > distance, I was unable to say for certain that these were blowing towards > me. > > I indirectly got in touch with the BoM, but they say that the southerly > flow was too fast for the Spillane eddy to form. > > The first time I saw this was on June 27 in the morning, which had a > very similar synoptic situation over Victoria. It was quite noticeable > around 9 through to about 10am, but by 10:30, the smoke stacks on this > side became erratic in nature, and eventually adopted a northward flow, > thus matching the western side and the synoptic pattern. This would be > explained by convective heating breaking this 'eddy'. > > I took photos showing the opposing motions of the smoke stack, but the > lack of contrast made the smoke stack in the distance invisible in the > scan. However, it can be seen well in the prints. > > So, does anyone have an idea? > > > 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------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: wbc at ozemail.com.au (Laurier Williams) To: aussie-weather at world.std.com Subject: aus-wx: More Blue Mountains snow? Date: Thu, 27 Jul 2000 08:04:30 GMT X-Mailer: Forte Agent 1.5/32.452 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id EAA14719 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I don't want to jynx it, but I think there's a chance the upper Mountains may get a bit more snow from the rain mass now approaching from the south. Latest radar (5.50pm) has a large area of dark blue (with a few heavier bits) moving due north at around 40 to 50kts, and maintaining its intensity well inland, rather than bleeding out to nothing as it usually does. On current movement, there may be snow here by 8pm. This is the same precip area that gave Canberra and Goulburn some snow earlier. Laurier +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: Thu, 27 Jul 2000 18:22:50 +1000 From: Paul Miracki X-Mailer: Mozilla 4.73 [en] (Win98; U) X-Accept-Language: en To: aussie-weather at world.std.com Subject: aus-wx: Snow Email :)))))))) Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hey all, Just heard and saw on the news that it had snowed in Springbrook, Queensland!!!! Very wet stuff, and it melted as it settled on anything but it was still snow!! I think they said that it hasn't snowed there for 16 years! +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: wbc at ozemail.com.au (Laurier Williams) To: aussie-weather at world.std.com Subject: Re: aus-wx: More Blue Mountains snow? Date: Thu, 27 Jul 2000 08:23:17 GMT X-Mailer: Forte Agent 1.5/32.452 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id EAA16018 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com 6pm report from Bowral indicates it is snowing there. Currently (6.20pm) at Blackheath, 0.2 deg and overcast. Laurier On Thu, 27 Jul 2000 08:04:30 GMT, wbc at ozemail.com.au (Laurier Williams) wrote: >I don't want to jynx it, but I think there's a chance the upper >Mountains may get a bit more snow from the rain mass now approaching >from the south. Latest radar (5.50pm) has a large area of dark blue >(with a few heavier bits) moving due north at around 40 to 50kts, and >maintaining its intensity well inland, rather than bleeding out to >nothing as it usually does. On current movement, there may be snow >here by 8pm. > >This is the same precip area that gave Canberra and Goulburn some snow >earlier. > >Laurier > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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 Tichborne" To: Subject: aus-wx: Re: aussie-weather-digest V1 #653 Date: Thu, 27 Jul 2000 20:22:20 +1200 Organization: Private 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 > >Do you ever get Winter thunderstorms from the west in Christchurch. I am > >thinking that if Wollongong is rainshadowed by 800m ranges, well > >Christchurch must be well and truly shadowed from the west. > > > >Michael > > > Not particulaly. Any thunder related activity along the Alps usually stays > there or drifts north. Summer time we do get the occasional 'drift-over' > but not very often. I've only once heard of a thunderstorm in northwesterly conditions in Christchurch. That was in January 1991. (I wasn't living in Chch then - John, you'd have the details in your diary) That was a pretty strange ocurrence - the flow was only light and there was only light rain/ drizzle on the West Coast. There must have been some local instability. Note that there are about 50 km of sloping plain between Chch and the mountains. BTW that 50 km didn't stop some rain (but no thunder) reaching the city today. Not surprisingly, heavy rain about and west of the alps. Vicious northwesterly gales about Wellington today, around 20 C maximums in some eastern places, but colder in the far south as the colder air that's been chilling SE Australia lately begins to move in, finally delivering snow to the skifields (up to 25 cm). Laxatives must have been pumped into NZ's atmosphere lately - the blocked situation has ended and things are moving again! Ben Christchurch NZ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: "dann weatherhead" To: Subject: aus-wx: Penrith to Putty Chase Date: Thu, 27 Jul 2000 18:25:56 +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
Is it the lure of the hunter, maybe, my car (thunderbird1) know that the hunter is a good thing. Anyway at about 3pm I found myself on the way to the hunter, camera firmly belted into the passenger seat, and road map at arms reach.
 
At about 12:30 I was sitting in class noticing some rather wonderful looking congestus popping up to my south-west over the Silverdale-Warragamba region. Then after a small heavy shower, accompanied by some nice thunder got me excited and annoyed that I trapped in class. After getting out of class and phoning Matt Smith I saw a very dark mass of cloud to my N. This had mammatus and a very nice base with hail falling out of the anvil (which occurred on most CB's today) However, this CB to my north was actually two. The one closest to me died and the further one intensified. I received some very small hail at Windsor.
 
After battling through the traffic at Windsor, I sped through Freemans Reach, enjoy a panorama of the sky at the floodplain a few minutes proceeding Wilberforce. It was hailing on the foothills of Richmond/Kurrajong. I pushed on and found myself on the trusty Putty Rd. Ahh the putty! There was cu-filled blue skies to the east and black skies to the west. Travelling down to Colo Heights, I drifted into the back of a shower, which then turned into some hail, some nice sized hail 1cm to maybe 2cm hail. However those who have traveled down this part of the Putty Rd know there is nowhere to stop being a particularly curvy steep part of the journey. At Colo, it was just raining with the occasional hailstone, but most had drifted north westward. Speaking to the service station clerk who told me they had hail earlier in the day at about 1pm. And some snow reported at Portland as well (??????). After pushing on a little further for about 30 minutes I turned around and came back, feeling refreshed with that good old chaser rush feeling, (although the car was particularly keen for me to head forward to the hunter). Anyway some nice sunset pics were taken on the way home.
 
All in all, an a good day, a good chase to get into stride for the coming season.
News just in. Matt Smith has reported  CG's off the coast of Sydney with a nice rain band headed up the coast. More to follow hopefully.
 
dann
__________________________
Daniel Weatherhead
Blaxland, NSW
weatherhead at ozemail.com.au
SYDNEY STORM CHASERS
www.sydneystormchasers.com
 
 
 X-Sender: paisley at mail.cobweb.com.au Date: Thu, 27 Jul 2000 18:24:19 +0930 To: aussie-weather at world.std.com From: Phil Bagust Subject: Re: aus-wx: A snowy drive up the Great Divide Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com >Quite an interesting drive from Bairnsdale to Blackheath yesterday. [snip] >Laurier Great account Laurier! Very entertaining and lovely. Any snaps? ___________________________________________________________________ Phil 'Paisley' Bagust - paisley at cobweb.com.au Paisley's Playpen at http://www.chariot.net.au/~paisley2 "Java = [J]ust [A]nother [V]irtual [A]nnoyance" +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: Thu, 27 Jul 2000 04:03:15 +1000 From: Don White X-Mailer: Mozilla 4.5 [en] (Win98; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Brisbane, Gold Coast chill out Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Brisbane's coldest day was 12 August 1954 - max of 10.2 degrees. don w clyve herbert wrote: > > Hi Anthony > >From memory the lowest max for Brisbane is 10.3c but i cant remember the > date can anyone add most likely occurred under similar conditions to today > ie lots of mid level stuff and colder lower surface flow witch may have been > helped along by isothermal conditions last night also the natural cooling > effect of large scale evaporation if light rain was falling from the mid > layers > regards Clyve H > ----- Original Message ----- > From: Anthony Cornelius > To: > Sent: Thursday, July 27, 2000 3:07 PM > Subject: Re: aus-wx: Brisbane, Gold Coast chill out > > > Hi Mark, > > > > I've had a max of 11.7C today...been hovering around 10C most of the > > day, clearing edge of this cloud band seems to be coming through soon, > > so maybe we'll get higher temps then...still iffy! What's the lowest > > recorded max in Brisbane? I was under the impression it was about > > 13.4C...but can't remember! > > > > Talking to the BoM, sleet has been reported in Springbrook (QLD) around > > midday today!!! I'm seriously considering going down to Stanthorpe > > tonight/o'night...but I have to see how I go with uni (inconvieniently > > tonight), and work. > > > > This frozen Brisbanite is signing out... > > > > Anthony Cornelius > > > > "The Weather Co." wrote: > > > > > > 2pm temperatures in Brisbane and Gold Coast are as low as I remember > seeing > > > at 7 degrees. If it gets much colder surely we'll be hearing reports of > snow > > > on the hinterland to the west. > > > Mark > > > ____________________ > > > The Weather Company > > > Level 2, 7 West Street > > > North Sydney 2060 > > > Phone: (02) 9955 7704 > > > Fax: (02) 9955 1536 > > > twc at theweather.com.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------------------------------ > > > > -- > > 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------------------------------ > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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: "MSC - Jane ONeill" To: Subject: RE: aus-wx: Spillane eddy over Melbourne this morning?????? Date: Thu, 27 Jul 2000 18:04:33 +1000 X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) Importance: Normal Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Robert, I wonder if what you describe is a local effect...for example, quite often in the early morning the valley of Dandenong Creek in its upper reaches around Bayswater & Heathmont is under the influence of a NNE flow while the rest of Melbourne seems to be under a flow with a more southerly &/or westerly component. I've always thought that this flow may be air draining off Mt Dandenong or out of the Yarra Valley. If I remember the building at Monash, what is your local geography? - I think you are on the south facing slope of a slight rise.....would this account for a localised flow and its cessation by mid morning? Jane --------------------------------------- Jane ONeill ASWA - Victoria http://www.severeweather.asn.au Melbourne Storm Chasers http://www.rubix.net.au/~cadence --------------------------------------- Hi all Can anyone shed some light on this one? I live one floor from the top of a 12 storey building in Clayton (about 20km SE of Melbourne CBD) and my view is to the west. This morning was the second morning where I noticed the smoke from neighbouring smoke stacks blowing southward, while on the west side of the bay, the smoke from those smoke stacks was blowing to the north. Looking at the MSL analysis and the cumulus cloud motions showed a southerly flow present, although this was barely noticeable at ground level as I walked to uni. Q. I was wondering if this caused by the effects of the Spillane eddy? (Er, this is a cyclonic circulation centered on Melbourne bound by the ranges to the north and east and west, and forms under stable conditions. Bob Crowder's book shows a satellite image of this and mentions it briefly in the section on air pollution.) Or is it simply caused by the geography of my area? At the moment, I'm trying to get a hold of an elevation map of the region here, as I'm not quite sure where everything is. Incidently, this cannot be explained by wind shear in the vertical as the sounding doesn't show this dramatic 180 degree turn. I should point out that smoke stacks to the south showed no east-west deviation, and seemed to be blowing away, while those to the north-northwest also had no east-west deviation, but due to their distance, I was unable to say for certain that these were blowing towards me. I indirectly got in touch with the BoM, but they say that the southerly flow was too fast for the Spillane eddy to form. The first time I saw this was on June 27 in the morning, which had a very similar synoptic situation over Victoria. It was quite noticeable around 9 through to about 10am, but by 10:30, the smoke stacks on this side became erratic in nature, and eventually adopted a northward flow, thus matching the western side and the synoptic pattern. This would be explained by convective heating breaking this 'eddy'. I took photos showing the opposing motions of the smoke stack, but the lack of contrast made the smoke stack in the distance invisible in the scan. However, it can be seen well in the prints. So, does anyone have an idea? 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------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: "Pearce" To: Subject: Re: aus-wx: Snowchase Date: Thu, 27 Jul 2000 18:08:57 +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 all again Well, a great day comes to an end(or does it?). I left Sydney at 9am with the promising signs of numerous glaciated Cbs on the ranges to the west, with snow already falling west of the ranges. As I climbed, my trusty thermometer showed the temp dropping steadily until it was approx 2C at Leura(~900m), where the first snow was visible on the ground, evidently having been there for some time as the skies were blue and the roads were dry. I pulled into Leura and took a few photos of snow on the ground as I had never seen it before outside the ski-fields. Following this, I pushed on towards Mt Victoria, which is basically the highest point on the Blue Mountains. Although it was about 1C there, it did not feel that cold as the sun was out and the wind was only light. This was not too encouraging, however to the west, heavy snow showers could be seen, and I stood watching these for about 30 minutes. I left Mt Victoria at midday in pursuit of this snow as I wanted to see a full-on snow shower first hand. As I headed west, it became apparent I wouldn't even get to Lithgow before it was going to hit me. The sky was an ominous shade of black and then it started. I pulled over to take some photos, and although it was only light, it was certainly impressive nonetheless. I then pushed on into Lithgow itself and found a nice deserted park(so the locals didn't think I was too mad :) ). By this time, the snow had become quite heavy, with visibility down to around 1km. I stood in the park in the blowing snow for about 5 minutes before everything started going numb, with a few locals staring strangely at me. The temp was 1.2C on my thermo at this time, but this was mounted on the car, which was warm, so it was probably around 0 or -1C. Wanting to see if this had produced anything major back on the Blue Mountains I then headed back up the Victoria Pass, reaching Mt Victoria around 1pm. There was still some snow on the ground, but the cell had died unfortunately. I had lunch there, and by the time I looked to the east again, a very interesting cell caught my eye, with very strong updrafts, so I decided to abandon the snow, and turn the day into a storm chase! I headed east along the Great Western Highway, and intersected the cell at Lawson. I pulled over into another park, and then small hail began falling, lightly at first around 2:15pm. This kept up for around half an hour, with the biggest size I saw 5mm, but it was enough to make the ground turn white(not sure if this possibly explained some of the reports of snow to very low levels in the BM this afternoon). During this time, Matt Smith rang and I managed to annoy him no end with my comments about how much hail was piling up on my windscreen wipers etc :) I made a few "ice-balls" with the contents of the hail on my roof before I was about to leave. However, just as I was getting in the car, the hail stopped and light snow began to fall for about 5 minutes, this being at an altitude of ~600m. I decided to head back up the mountains a way to see if they had got anything decent from the cell. A little way back up the highway, I intersected it again, with hail much heavier this time, making a quite loud noise on the car. The ground was covered in the stuff, with the roads becoming quite slippery. However, at Wentworth Falls, I left the cell and watched it pass on to the NE. I took a few photos of the structure, then decided to call it a day as I was getting pretty tired. So, at about 3pm, I commenced the long journey back through Sydney's hideous traffic, seeing some nice mammatus and a rainbow in the process on developing showers that were popping up around the metropolitan area. At this time(6pm), a rain band is moving up the coast with the slight potential to do something interesting later tonight, but I think the BoM's forecast of small hail in Sydney is a bit optimistic at this stage. However, all in all, it was a great day, and well worth the 2 lectures I missed at uni! Matthew +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: Thu, 27 Jul 2000 20:24:24 -0700 From: Lindsay X-Mailer: Mozilla 3.0 (Win16; I) To: aussie-weather at world.std.com Subject: aus-wx: Gorgeous snow in Blackheath Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Blackheath Thursday 8:25pm EST Wind: Calm or very light. Temp 0 Wet Bulb 0 Gorgeous continuous fall of light snow here now. It started at around 7:30pm. Light cover on the ground. The fascinating thing is the lightness and dryness of the snow and its only pea size, on average, or even smaller. I imagine this has to do with the coldness of the air higher up? And moisture levels even? Regardless, it is absolutely beautiful. Lindsay P. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: Brisbane, Gold Coast chill out Date: Thu, 27 Jul 2000 20:36:15 +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 all It's currently (8.30pm) 5.1C in my courtyard in Woodridge, just south of Brisbane. I live in a small valley meaning the temp is a little colder than the surrounding area. It was 7.5C at 7pm (my coldest 7pm temp ever) and the maximum temp was only 11.6C between 10am and 11am. All this after yesterday's maximum temp of 26C!! Obviously it's a bit of a shock to the system! The RH is currently very close to 100% and it's mostly calm - any breath of wind seems to be from the north or NW. If the SW'er doesn't spring up I'd say we're in for a very cold fog. Apparently there is already some fog in some areas of Brisbane. We had 13mm all up from the rain last night and during the day. Ccccccccccold! Regards James Chambers >Brisbane's coldest day was 12 August 1954 - max of 10.2 degrees. >don w > >clyve herbert wrote: >> >> Hi Anthony >> >From memory the lowest max for Brisbane is 10.3c but i cant remember the >> date can anyone add most likely occurred under similar conditions to today >> ie lots of mid level stuff and colder lower surface flow witch may have been >> helped along by isothermal conditions last night also the natural cooling >> effect of large scale evaporation if light rain was falling from the mid >> layers >> regards Clyve H >> ----- Original Message ----- >> From: Anthony Cornelius >> To: >> Sent: Thursday, July 27, 2000 3:07 PM >> Subject: Re: aus-wx: Brisbane, Gold Coast chill out >> >> > Hi Mark, >> > >> > I've had a max of 11.7C today...been hovering around 10C most of the >> > day, clearing edge of this cloud band seems to be coming through soon, >> > so maybe we'll get higher temps then...still iffy! What's the lowest >> > recorded max in Brisbane? I was under the impression it was about >> > 13.4C...but can't remember! >> > >> > Talking to the BoM, sleet has been reported in Springbrook (QLD) around >> > midday today!!! I'm seriously considering going down to Stanthorpe >> > tonight/o'night...but I have to see how I go with uni (inconvieniently >> > tonight), and work. >> > >> > This frozen Brisbanite is signing out... >> > >> > Anthony Cornelius >> > >> > "The Weather Co." wrote: >> > > >> > > 2pm temperatures in Brisbane and Gold Coast are as low as I remember >> seeing >> > > at 7 degrees. If it gets much colder surely we'll be hearing reports of >> snow >> > > on the hinterland to the west. >> > > Mark >> > > ____________________ >> > > The Weather Company >> > > Level 2, 7 West Street >> > > North Sydney 2060 >> > > Phone: (02) 9955 7704 >> > > Fax: (02) 9955 1536 >> > > twc at theweather.com.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------------------------------ Date: Thu, 27 Jul 2000 20:41:17 +1000 From: Andrew Miskelly X-Mailer: Mozilla 4.72 [en] (Win95; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Taralga Snow Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi all, Show's over in Taralga also. Now that I'm back here I'd love to be in Wollongong/Robertson right now, I have no doubt it's snowing on th escarpment. Andrew. Andrew Miskelly wrote: > > Taralga 2125 EST: Intermittent Snow Showers, Light W wind, 0.7C. > > Hi all, > > Well, being the freelance idiot that I am I decided to break my week at > uni in Wollongong and head for the hills (aka parent's place). > > Only showers of snow here in Taralga so far, with plenty of clear sky in > between. I'm hoping a combination of the imending cold pool and more of > a south-westerly element will make things a little more exciting later > tonight and tomorrow. At the moment we have a dusting of snow on the > ground, very light westerly wind and 0.7 degrees C. > > Andrew. > > -- > Andrew Miskelly > Illawarra/Southern Tablelands, NSW > amiskelly at ozemail.com.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------------------------------ -- -- Andrew Miskelly Illawarra/Southern Tablelands, NSW amiskelly at ozemail.com.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------------------------------ Date: Thu, 27 Jul 2000 20:54:16 +1000 From: Tony Rance X-Mailer: Mozilla 4.72 [en] (Win95; I) X-Accept-Language: en To: "aussie-weather-digest at world.std.com" Subject: aus-wx: Snow in Katoomba Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I live in North Katoomba Blue Mountains NSW It is 8:50pm Thursday night & zero degrees Celsius. It has been snowing for half an hour now & is 4 to 5 centimetres thick on all the trees / rooves / car & ground. The flakes of snow are quiet small but compact & falling thickly. The trees are weighed down & our road is covered in thick sloppy snow & not recommended for driving. Tony +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: wbc at ozemail.com.au (Laurier Williams) To: aussie-weather at world.std.com Subject: Re: aus-wx: Gorgeous snow in Blackheath Date: Thu, 27 Jul 2000 10:56:49 GMT X-Mailer: Forte Agent 1.5/32.452 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id GAA28645 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Blackheath 8.50pm Yes, Lindsay. I haven't seen snow quite like it here. It is very fine, crystaline snow and falling very thickly. 3cm on the ground now and starting to build up on the road outside. Absolutely calm. Temp here -0.3. I didn't even realise it was snowing until I walked outside -- it makes no sound whatsoever. Now, this could be interesting. The radar shows the rain coming in from the SSE, with a large area of light blue with some substantial yellow spots. I suspect the Illawarra escarpment north of Wollongong is getting some serious rain. What's more, the rain extends SE from Sydney to the edge of radar coverage, and the band doesn't appear to be moving northwards as expected. The lower and mid mountains should be getting heavier rain then here, so there must be some point, say Wentworth Falls, that is above snowline and getting good precip. Any information from you guys farther down the hill? My data is temporarily down -- I'll post again when I have more information. Pity those of you that chased left so early ;-) Laurier On Thu, 27 Jul 2000 20:24:24 -0700, Lindsay wrote: >Blackheath Thursday 8:25pm EST > >Wind: Calm or very light. > >Temp 0 > >Wet Bulb 0 > >Gorgeous continuous fall of light snow here now. It started at around >7:30pm. > >Light cover on the ground. > >The fascinating thing is the lightness and dryness of the snow and its >only pea size, on average, or even smaller. I imagine this has to do >with the coldness of the air higher up? And moisture levels even? > >Regardless, it is absolutely beautiful. > >Lindsay P. > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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: davidkc at advanceenergy.com.au Subject: aus-wx: road updates To: aussie-weather at world.std.com, "Lindsay" , Ross Wilson Date: Thu, 27 Jul 2000 10:48:45 +1000 X-MIMETrack: Serialize by Router on Domino/Advance(Release 5.0.3 (Intl)|21 March 2000) at 27/07/2000 10:48:51 AM Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com 10.44am 27/07/2000 Police are stopping traffic at Raglan east of Bathurst on outskirts. Truck has jacknifed at Yetholme and cars are also losing control on roads. Lanes have been blocked until further notice at Lithgow and Bathurst.. Dave +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: "Matthew Piper" To: "Aussie Weather" Subject: aus-wx: Current Blaxland Weather Date: Thu, 27 Jul 2000 21:26:11 +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
Blaxland (9:20pm)
 
Currently it is raining lightly (0.4mm in the last 1.5hrs) and the temperature is a very chilly 5.1 degrees. This would have to be one of the lowest temperatures I have ever seen rain fall in Blaxland. This is more typical of a clear frosty night instead of a completely overcast and wet one.
 
Matthew Piper
 Date: Thu, 27 Jul 2000 07:40:52 +1000 From: Don White X-Mailer: Mozilla 4.5 [en] (Win98; I) X-Accept-Language: en To: aussie-weather at world.std.com Subject: Re: aus-wx: Current Blaxland Weather Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Very cold everywhere. It is raining in Sydney and at Observatory Hill its 6.3 at 9 pm - a very low temp for a wet night. Bellambie - out on a point surrounded by ocean is just 6.4 degrees and i note that Jervis Bay has had 26 mm of rain in the last 6 hours so there's moisture around - The Blackheath boys may have to dig themselves out in the morning ! Continuous light but big spotted rain in NE Sydney for the last hour don White > Matthew Piper wrote: > > Blaxland (9:20pm) > > Currently it is raining lightly (0.4mm in the last 1.5hrs) and the > temperature is a very chilly 5.1 degrees. This would have to be one of > the lowest temperatures I have ever seen rain fall in Blaxland. This > is more typical of a clear frosty night instead of a completely > overcast and wet one. > > Matthew Piper +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: [203.21.253.125] From: "Rod Aikman" To: aussie-weather at world.std.com Subject: Re: aus-wx: Spillane eddy over Melbourne this morning?????? Date: Thu, 27 Jul 2000 21:54:06 EST Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi everyone, Speaking of local geographical effects on wind patterns under certain weather conditions inspires me to mention a particular wind effect that is often experienced here (Bendigo). During summer, under clear anticyclonic light southerly to south-easterly surface wind flows, the maximum temperature will reach the high twenties to thirty degree range. A short while after sunset, or a little after 9.00pm in January, the very light southerly to south-easterly wind will freshen right up to around 20-25 km/h, and remain at this force for a couple of hours, before moderating back to virtually calm conditions around midnight. Just after sunset, the most rapid cooling takes place under dry air, light wind, clear sky conditions, and it is this rapid cooling that I think sets up a katabatic effect, in that the cooler air near the surface slides down the northern slopes of the dividing range and re-inforces the slight south to south-east surface flow. Rod Aikman Golden Square, Bendigo, Vic. Hi Robert >From my limited study of this phenomenon the Spillane eddy requires the positioning of an anticyclone towards the south of Victoria and a low level east flow pattern the development though appears rather complex and may be associated with complicated katabatic effects across the Port Phillip bay area ie the mean katabatic flow over northern parts of the bay is usually from a north direction but on the west side of the bay mostly from a west or north west angle the easterly flow may also be enhanced by channelling through the Latrobe valley area , what you saw may have been a local katabatic effect with the distant stacks just above the low level cold outflow boundary layer i have seen this effect at the shell refinery corio where the highest stack moves from an east direction and lower stacks from a west direction in early morning situations its all interesting stuff regards Clyve H ----- Original Message ----- From: Robert Goler To: Sent: Thursday, July 27, 2000 2:48 PM Subject: aus-wx: Spillane eddy over Melbourne this morning?????? > > Hi all > > Can anyone shed some light on this one? > > I live one floor from the top of a 12 storey building in Clayton (about > 20km SE of Melbourne CBD) and my view is to the west. This morning was the > second morning where I noticed the smoke from neighbouring smoke stacks > blowing southward, while on the west side of the bay, the smoke from > those smoke stacks was blowing to the north. Looking at the MSL analysis > and the cumulus cloud motions showed a southerly flow present, although > this was barely noticeable at ground level as I walked to uni. > > Q. I was wondering if this caused by the effects of the Spillane eddy? > (Er, this is a cyclonic circulation centered on Melbourne bound by the > ranges to the north and east and west, and forms under stable conditions. > Bob Crowder's book shows a satellite image of this and mentions it briefly > in the section on air pollution.) > > Or is it simply caused by the geography of my area? At the moment, I'm > trying to get a hold of an elevation map of the region here, as I'm not > quite sure where everything is. Incidently, this cannot be explained by > wind shear in the vertical as the sounding doesn't show this dramatic 180 > degree turn. > > I should point out that smoke stacks to the south showed no east-west > deviation, and seemed to be blowing away, while those to the > north-northwest also had no east-west deviation, but due to their > distance, I was unable to say for certain that these were blowing towards > me. > > I indirectly got in touch with the BoM, but they say that the southerly > flow was too fast for the Spillane eddy to form. > > The first time I saw this was on June 27 in the morning, which had a > very similar synoptic situation over Victoria. It was quite noticeable > around 9 through to about 10am, but by 10:30, the smoke stacks on this > side became erratic in nature, and eventually adopted a northward flow, > thus matching the western side and the synoptic pattern. This would be > explained by convective heating breaking this 'eddy'. > > I took photos showing the opposing motions of the smoke stack, but the > lack of contrast made the smoke stack in the distance invisible in the > scan. However, it can be seen well in the prints. > > So, does anyone have an idea? > > > 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------------------------------ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------ ________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.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------------------------------ Date: Thu, 27 Jul 2000 21:49:29 +1000 From: David Carroll X-Mailer: Mozilla 4.7 [en] (Win98; I) X-Accept-Language: en To: Aussie Weather Subject: aus-wx: Roads - Snow Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com 9.45pm 27/07 HI all. RTA and Police have closed West bound lanes on Bells Line Rd, truck is stuck on hwy and will not be moved until roads clear. Roads in this area are extremely icey as advised by Lithgow Police.. Bathurst Police have closed East Bound lane from Raglan. It is extremely cold here in Bathurst. No snow in site here.. Dave +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: Thu, 27 Jul 2000 22:05:39 +1000 From: David Carroll X-Mailer: Mozilla 4.7 [en] (Win98; I) X-Accept-Language: en To: Aussie Weather Subject: aus-wx: Snow - Roads Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com 10pm 27/07 Police advise Duckmaloi rd and Jenolan Caves rd closed due to thick snow and ice. This info for all people intend on chases near Oberon. Police now checking Edith Rd for snow and ice. Re Bells Line Rd, Truck is stuck on blind corner, safety wise roads closed east and west. >From Mt Boyce to Wentworth Falls roads closed.. Great Western Highway from Bathurst to Lithgow is closed by RTA and Ses. Dave +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: "Michael Thompson" To: Subject: aus-wx: Robertson Snow Date: Thu, 27 Jul 2000 22:31:11 +1000 X-Mailer: Microsoft Outlook Express 5.00.2014.211 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Thanks to Andrew Godsmen who left a message on my answering machine I decided to do a quick chase to Robertson this evening after getting the baby off to sleep. Left around 6.45pm and it was around 7C at Mt Warrigal, this is pretty cold for here with rain. At Albion Park the drops became heavier, but no hail. Sleet started at the notorious Macquarie Pass hairpins, which for those that do not know the pass are 4/5 of the way to the top. True snow did not start until the top of the pass. Heavy for while on the escarpment top. At Robertson there was 2-3 cm on the ground, perhaps less. Snow was over the road in some parts. Drove a little west and snow stopped abruptly near Wingacarrabie Dam. Turned back home, snow had stopped in Robertson as well. Michael Thompson http://thunder.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-Sender: jdeguara at pop.ihug.com.au X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Date: Thu, 27 Jul 2000 22:50:58 +1000 To: aussie-weather at world.std.com From: Jimmy Deguara Subject: aus-wx: Snow Chase Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi all, I wouldn't have written this snow chase report hadn't it been a little exciting and varied. Our reports are similar to observations made by Matthew Pearce except different location. We went up the Bells Line Road and saw in the shade some increasing areas of snow as we headed towards Lithgow. After a brief observation stop, we decided the action was with the cumulonimbus to the W near Mt Lamby. You could also see snow in the hills of that area. Most of this had occurred overnight. We had lunch at Mt Lamby watching the Weather Channel at the same time!!! As we finished, I kept focusing on the cumulonimbus to the N. I judged that it was within reach of the region around Cherry Tree Hill. Nothing much had seemed to be happening except towards Lithgow (which is the snow described by Matthew Pearce). Behind that, there was blue sky and cumulus, although some were large. Before approaching Cherry Tree Hill, there was light snow and then increasing to heavy falling snow. Snow then began to settle and as we neared the top (1100m), there was a light cover and heavy snow falling with reasonable size flakes (~10c coin size). The visibility was down to 500m and remained that way for about 30 minutes in patches. This increased the cover to several cm over the grass and settled on trees. Temp recorded to be at least -0.5C during the falling snow. When this was over, we took more photos of the parting cold weather cb region and then headed back for some nice developing cb's towards Sydney region. Some nice cb's did await us but we couldn't catch the main hail shower heading N described by Dann Weatherhead. It had a nice spectacular hail shaft. Oh well. We did take note that around Kurrajong Heights, there was isolated flakes falling amongst the approaching cb band and hail. At the lookout, you could see the defined snow line vary from closer to the base on the edges of the cb's to much lower than the base in the centre downdraught areas of the cb's. I have a photo of this. We also received some 3mm hail for a minute or two on the lookout. An enjoyable day overall. I have the video to show at a future meeting. Those who came along were myself, Mario Orazem, John Sweatman and Glen ORiely. Raining in Schofields for the past few hours now 10:50am Jimmy Deguara +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: jdeguara at pop.ihug.com.au X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Date: Thu, 27 Jul 2000 22:55:46 +1000 To: aussie-weather at world.std.com From: Jimmy Deguara Subject: aus-wx: ASWA in the news?? Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi me again, I received a phone call this afternoon after the chase from The Australian newspaper. After a short few questions, he suggested he will ring later for a better chat about ASWA. This is one of the several papers I have targeted for promotion of ASWA. Well he did ring and ask me questions at some length. I hope the information is portrayed correctly but he said it will be in Monday's edition of "The Australian" national newspaper in the weather section. Fingers crossed. I am still sick so I think he was very patient with my coughing etc etc. Jimmy Deguara +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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------------------------------