Date: Wed, 31 May 2000 10:09:07 -0400 From: "Leslie R. Lemon" Subject: aus-wx: Snow Chase To: "INTERNET:aussie-weather at world.std.com" X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id KAA20694 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com > John Sweatman wrote: > This evening I've had the time to compile a report on my snow chase on the > weekend. A bit belated, I know, but I thought everyone might want to know > the type of weather I experienced. Very much deleted Long, yes, but very enjoyable and well described! A great report, I felt like I was there! Thanks! Les ************************ Leslie R. Lemon Radar, Severe Storms, & Research Meteorologist Tel. 816-373-3533, 816-213-3237 E-Mail: lrlemon at compuserve.com +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-Sender: carls at ford.ace-net.com.au Date: Thu, 1 Jun 2000 05:50:01 +1000 To: Aussie Weather List From: Carl Smith Subject: aus-wx: Cold Snap Satpic Loop & Hi-Res satpic Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi All. Some of you may wish to see the SE Australia Cold Outbreak Satpic Animation from 2000-05-23 17:32 to 31 11:32 UTC I have put together. The URL is: http://www.ace-net.com.au/~carls/Images/SE-AustColdSnapAnim.gif These 6 hourly false colour infrared satpics are trimmed from JMA GMS-5 images downloaded from the BoM with a colour table applied to enhance visibility of the features. The colours show infrared temperature in 32 steps from white to blue for 'hot' areas (there are no white land or sea surfaces in this sequence - it's too cold), with freezing point being a bluish-green, green is below freezing, and yellow to red to brown to black for very 'cold' cloud tops (there is no brown or black either - more often seen in severe cyclone cloud tops, and not often evident in the BoM version of the GMS-5 images for some reason). Some of the features you may notice are: - the very cold cloud tops in yellow - red which indicate areas where heavy rain/hail/sleet/snow is more likely to be occurring, some heavy snow dumps in the highlands are associated with some of these as the sequence progresses, and you can see the heavy hailstorm that hit Melbourne. - the green frontal bands which are where periods of rain/hail/sleet/snow may be occuring. - the mottled green clouds in the pools of very cold air behind some of the fronts which may be showers of rain/hail/sleet/snow. - the ocean is shades of blue being rather warmer than the clouds and not much effected by the daily solar heating/cooling cycle. - the daily solar heating/cooling cycle effecting the land surfaces seen as the alternating blue to blue green colour, with the extreme cooling of the land surfaces at night being very evident towards the end of the sequence by the extensive areas of more greenish colour (below freezing) covering much of the visible land area. - those with an eye for detail may notice Lake Eyre which is currently full of water as a blue smudge in SA in some of the night-time frames. Hi Resolution Satpic: There is a false colour high resolution NOAA12 thermal satpic of 29 May 2000 at 1838 UTC (30th 2:38 am AEST) downloaded from the CSIRO where you can see the effects of the current cold snap on SE Australia. The URL is: http://www.ace-net.com.au/~carls/Images/SE291838UTCc.gif The colours show infrared temperature in 256 steps from white to blue for 'hot' areas (there are no white land or sea surfaces in this image - it is too cold!), with freezing point being a bluish-green, green is below freezing, and yellow to red to brown to black for very 'cold' cloud tops. The relativly warm ocean is blue, with a warmer lighter-blue current visible flowing down the E coast. In contrast, the now cold land surface is bluish-green around freezing point, with the more greenish parts being sub-zero. The banded green cloud areas across much of NSW are showing areas of snow falls on the higher ground and sleet/rain in lower areas as the cold frontal bands move through. The mottled green areas along the S coast indicate snow showers to lower levels, which are quite heavy in the yellow patches over the ranges N of Melbourne, and had recently been a heavy hail storm in Melbourne, and the yellow-red areas in Port Phillip Bay showing more hail storms that were about to hit Melbourne as this satpic was taken. The yellow-red-brown-black area extending over the NE Highlands of Vic and the Southern Highlands of NSW indicates the likelihood of blizzard conditions in the high country, with heavy rain on the coast and out over the Tasman Sea. Regards, Carl. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Carl Smith. Gold Coast, Queensland, Australia. Email: carls at ace-net.com.au Internet: http://www.ace-net.com.au/~carls/index.htm Current Cyclone information: http://www.ace-net.com.au/~carls/current.htm Cyclone Tracking Maps: http://www.ace-net.com.au/~carls/TCMaps.htm or: http://cyclones.50megs.com/maps/TCMaps.htm Tropical Cyclone Archives: http://cyclones.50megs.com/ Please note the new location of all archive type material and update your bookmarks and website links. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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 (E-mail)" Subject: aus-wx: snowfalls Date: Thu, 1 Jun 2000 09:12:52 +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 >Hi, > >ski.com.au has several people reporting snow in the CBD and inner suburbs. >I'm suspect to this but after the hail storm last nite, the air temp >*really* dropped for a period of about 5 minute, my guess would be ~0C. >After a bit of discussion today, I think it may be possible for a very >localised coloumn of cold air could support snow to fall to low levels even >though sorounding tempertures would not make this intuitive - any thoughts >from the list? > >Cheers, Lyle. Lyle, think you have hit it on the head! It is not that unusual for the temp to drop 3 degrees in the typical cold air CB showers we get in cold outbreaks in Victoria, and with pre-shower temperatures often less than 10, the cut-off for snow can be reached. Also, obviously, if their is a down burst and the flakes fall more quickly than in still air, they have an increased chance of reaching the ground before melting. I have distinctly observed snow/sleet around Melbourne (at elevations less than 120m) on four occasions since shifting here in 1987, associated with heavy showers. In three of these I was home (with my thermometer!), and the temperature fell from 2-4 degrees in each case, to be in the range 2-3C. The pre shower temperature of ~5-7C was "too warm" for snow, but this didn't stop the snow/sleet. The other occasion I observed snow to low levels was Sept 1995, but this was more or less continuous snow with showers, without the apparent need for extra cooling from hail, down drafts etc. Another important point in this is the role humidity plays. If the humidity is low (particularly subzero wet bulb temperatures), falling flakes cool through the evaporation, slowing or even preventing melting. As a guide, the relative humidity that marks the approximate snow/rain boundary is given by, RH = -7.5 T + 93 So you can that fallen precipitation will likely be snow for a surface temperature of 5C and a relative humidity less than 55%. 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------------------------------ X-Originating-IP: [210.8.232.4] From: "Patrick Tobin" To: aussie-weather at world.std.com Subject: aus-wx: Icy roads in Canberra this am Date: Wed, 31 May 2000 16:50:55 PDT Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com As always with cold outbreaks, one of the legacies for Canberra once anticyclonic conditions return is a morning or two of very frosty streets and patches of black ice. With a minimum of -5 at Tuggeranong and -3 in Canberra, this morning was pretty treacherous on the roads and police reported a spate of minor accidents. I thought this might have happened a couple of days earlier but wind and cloud have taken a while to subside. The Brindabellas remain very white - I would estimate the visible snow line from Canberra to be around 1100-1200m. I enjoyed John Sweatman's snow chase - interesting to hear 1st hand of the depths up in the mountains. Especially when the early season means there is a dearth of "official" snow depth info. For the record however the main snow fall in Canberra on Sunday occured during the early afternoon from 1pm through to about 4pm. The wet and warm ground meant that, even though the snowfall was heavy at times, most melted fairly rapidly. Snow tended to stick in some of higher suburbs till midday Monday and on Mts Ainslie, Stromlo, Painter, Black Mtn etc (local hills) until heavy rain set in on Monday night. After the +2m drifts in the Snowy Mtns, you could be forgiven for not noticing a few 1 or 2 cm patches near Canberra on your way back at night!!! 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: Blair Trewin Subject: Re: aus-wx: Another cold spell for SE Aust To: aussie-weather at world.std.com Date: Thu, 1 Jun 2000 10:06:38 +1000 (EST) X-Mailer: ELM [version 2.5 PL2] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com > > Have noticed a few of the models starting to hint at another cold > spell for SE Aust next Sunday/Monday. > > Whilst not suggesting anything quite of scale of the recent cold outbreak, > some models appear to suggest the bight high responsible for the current > cold outbreak will will re-consolidate south of WA over the weekend and > have it drift east fairly slowly. The most recent GASP run is almost as cold in places as last weekend's outbreak (529 over southern NSW on Sunday night), although nowhere near as long-lived, and probably not as moist. If last weekend hadn't existed we'd be getting excited about the prospect of the best early-season outbreak in years, but we're a bit spoilt now :-) > If highs in this location becomes a pattern through the winter, this could > produce some pretty amazing snow totals over the Vic/NSW (and Tas) alpine > regions. I am starting to be reminded of 1981 ... Hopefully this is not the > kiss of death for the possibility of such an outcome. I actually also like > the idea of a re-run of 1949 but I am sure that is asking way too much. > I was hoping for 1900 or 1901 myself, although 1949 would do... Blair Trewin +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: "Les Crossan" To: "Aussie Weather (E-mail)" Subject: aus-wx: ICQ Date: Thu, 1 Jun 2000 00:20:23 +0100 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 Everybody, Due to my drive C: being completely trashed would those of you who were on my ICQ list please reapply! My number is 17296776. Les (UK) +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ X-WebMail-UserID: pyole Date: Thu, 1 Jun 2000 10:58:42 +1000 From: Paul Yole To: Ausie Weather ist X-EXP32-SerialNo: 50000114 Subject: aus-wx: New email addy X-Mailer: InterChange (Hydra) SMTP v3.51.07 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hey all, Just thought I would send a quick note to let everyone know about my new email addy at pyole at telstra.com The reason for this is because my ISP is in deep s at %t at the moment and I can't log onto the network Paul. --------------------------------- Powered by http://www.telstra.com +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com with "unsubscribe aussie-weather your_email_address" in the body of your message. -----------------------jacob at iinet.net.au------------------------------ From: Blair Trewin Subject: aus-wx: Weather mediawatch... To: aussie-weather at world.std.com (Aussie Weather) Date: Thu, 1 Jun 2000 11:36:49 +1000 (EST) X-Mailer: ELM [version 2.5 PL2] Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Noticed that an article in the Australian about match-fixing in cricket contained a line to the effect that the storm enveloping international cricket had become a category-one cyclone. I wonder if the journo who wrote it realises that category one is the lowest level of cyclone intensity? Blair +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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-WebMail-UserID: pyole Date: Thu, 1 Jun 2000 11:52:47 +1000 From: Paul Yole To: aussie-weather at world.std.com X-EXP32-SerialNo: 50000114 Subject: RE: aus-wx: Weather mediawatch... X-Mailer: InterChange (Hydra) SMTP v3.51.07 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com He musn't realise it cause he didn't incledue the word "Mini" Paul. >===== Original Message From aussie-weather at world.std.com ===== >Noticed that an article in the Australian about match-fixing in >cricket contained a line to the effect that the storm enveloping >international cricket had become a category-one cyclone. > >I wonder if the journo who wrote it realises that category one is >the lowest level of cyclone intensity? > >Blair > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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------------------------------ --------------------------------- Powered by http://www.telstra.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: carls at ford.ace-net.com.au Date: Thu, 1 Jun 2000 13:17:50 +1000 To: aussie-weather at world.std.com From: Carl Smith Subject: Re: aus-wx: Weather mediawatch... Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com >Noticed that an article in the Australian about match-fixing in >cricket contained a line to the effect that the storm enveloping >international cricket had become a category-one cyclone. > >I wonder if the journo who wrote it realises that category one is >the lowest level of cyclone intensity? > >Blair Hi Blair. Perhaps he's got wind of something that's about to break that could stir it all up to a higher category! Carl. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: Report on weekend cold outbreak Date: Thu, 01 Jun 2000 04:32:32 GMT X-Mailer: Forte Agent 1.5/32.452 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id AAA18898 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com I've put up detailed reports on the cold outbreak last Friday, Saturday and Sunday on the Australian Weather News site -- I think the Sunday report is the longest I've ever written. It draws on press reports, Bureau observations and personal communications, but I'd also really like to thank those on the list for filling in a lot of detail that otherwise wouldn't be reported. During events like this, aussie-weather is often more informative (and informed!) than the media and public Bureau output combined. Thanks! -- Laurier Williams Australian Weather News & Links http://ausweather.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------------------------------ From: wbc at ozemail.com.au (Laurier Williams) To: aussie-weather at world.std.com Subject: aus-wx: BoM aerological diagrams on the web! Date: Thu, 01 Jun 2000 06:18:41 GMT X-Mailer: Forte Agent 1.5/32.452 X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id CAA01730 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Just heard from the BoM that the latest SkewT upper air diagrams are available on the web at http://www.bom.gov.au/products/reg/IDS65024/IDS65024.shtml -- use id bomw0007 password aviation. They're a cut above Wyoming's, though they don't give the paramaters that Wyoming's do down the right hand side. However, they give both the latest and previous soundings, which is very handy for comparison. They also give non-standard hours -- excellent for Sydney which does its soundings at 6am and 3pm, and so is not picked up by Wyoming at all. I understand there's pressure within the Bureau to make these non-pw protected, but in the meantime they're part of the aviation suite that is pw protected but not (yet) user pays. Some instructions I received for using them: >Click anywhere on the Map to center it in your browser. Click on a location >to bring up the Sounding for that station. The sounding should come up with >the bottom presented though this doesn't always happen. Click on the >sounding above 700hPa and it will jump to the bottom. Click below this >level and it will jump to the top. Click to the left of the Sounding (over >the pressure numbers) and it will jump back to the map. On the upper right >of the Sounding are some Stability Parameters etc. PW = precipitable water, >TT = total totals. For the parcel drawn in the diagram in grey, Ts = >surface temperature, Ds = dewpoint, Plcl = lifted condensation level >pressure, Tlcl = lifted condensation level temperature, LI = lifted index. > >I plan to add some information on interpreting and using the diagram but >this may take some time to appear as I'm not so good at that kind of thing. >I may also add more stability stuff like CAPE if I get time. I haven't had time to play with these yet, but thought I'd pass on this great news immediately. -- Laurier Williams Australian Weather News & Links http://ausweather.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------------------------------ From: "Ben Quinn" To: Subject: Re: aus-wx: Sunset Pictures Date: Thu, 1 Jun 2000 18:23:32 +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 Tony, Yep they were taken with my new digi cam - a Kodak DC 215 (28-58mm zoom lens).. actually all my weather photos are taken with this camera now.. If anyone is thinking of buying a Kodak DC range camera - then i highly recommend them.. out of the few hundred pictures i've taken with it now, i think i've had 1 maybe 2 pictures that were poorly exposed.. the picture quality is also quite good - even though i have to take pictures at the lowest resolution and quality settings for the file size to be suitable for the net.. there are a few niggly little problems, but if anyone is thinking of buying a DC range camera, you can email me and i'll explain them.. Anyway - looks like i'll have sunset pics galore after this winter! barely a cloud in the sky here for the last 3 or 4 days - if a cold and dry winter means a better storm season, then bring on the the boredom i say.... ----- Original Message ----- From: T Middleton To: Sent: Thursday, June 01, 2000 1:47 PM Subject: Re: aus-wx: Sunset Pictures > exccellent!I assume they're dig. cam?(how quick you got them online)leading > up to the cold ouutbreak we had 3 consecutive days of great sunrises and > sunsets here,but the only pic i managed is on my site and even then i got > there tooooooo late.and you have probably seen it by now. > > > >From: "Ben Quinn" > >Reply-To: aussie-weather at world.std.com > >To: > >Subject: aus-wx: Sunset Pictures > >Date: Mon, 29 May 2000 12:46:06 +1000 > > > >Hi Everyone, > > > >I have uploaded a handfull of sunset pictures taken on May 20, and > >yesterday > >May 28.. yesterdays sunset was quite spectacular!! > > > >http://www.bsch.simplenet.com/products/recent-events-gallery/2000/29-05-200 0 > >.html > > > > > >Bloody cold up here today - temp at Brisbane airport is about 17c at the > >moment, but the windchill is about about 11c (i think).. brrrrrrrrrrrrr > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > 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------------------------------ > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: [210.84.5.147] From: "Paul Graham" To: aussie-weather at world.std.com Subject: Re: aus-wx: BoM aerological diagrams on the web! Date: Thu, 01 Jun 2000 02:12:57 PDT Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Excellent! The best thing about these ones is you can see the chances in stability from the previous trace overlayed...This is really good...I remember when we first found the Wyoming site and how excited everyone was.. - Paul G. >From: wbc at ozemail.com.au (Laurier Williams) >Reply-To: aussie-weather at world.std.com >To: aussie-weather at world.std.com >Subject: aus-wx: BoM aerological diagrams on the web! >Date: Thu, 01 Jun 2000 06:18:41 GMT > >Just heard from the BoM that the latest SkewT upper air diagrams are >available on the web at >http://www.bom.gov.au/products/reg/IDS65024/IDS65024.shtml -- use id >bomw0007 password aviation. They're a cut above Wyoming's, though they >don't give the paramaters that Wyoming's do down the right hand side. >However, they give both the latest and previous soundings, which is >very handy for comparison. They also give non-standard hours -- >excellent for Sydney which does its soundings at 6am and 3pm, and so >is not picked up by Wyoming at all. I understand there's pressure >within the Bureau to make these non-pw protected, but in the meantime >they're part of the aviation suite that is pw protected but not (yet) >user pays. > >Some instructions I received for using them: > > >Click anywhere on the Map to center it in your browser. Click on a >location > >to bring up the Sounding for that station. The sounding should come up >with > >the bottom presented though this doesn't always happen. Click on the > >sounding above 700hPa and it will jump to the bottom. Click below this > >level and it will jump to the top. Click to the left of the Sounding >(over > >the pressure numbers) and it will jump back to the map. On the upper >right > >of the Sounding are some Stability Parameters etc. PW = precipitable >water, > >TT = total totals. For the parcel drawn in the diagram in grey, Ts = > >surface temperature, Ds = dewpoint, Plcl = lifted condensation level > >pressure, Tlcl = lifted condensation level temperature, LI = lifted >index. > > > >I plan to add some information on interpreting and using the diagram but > >this may take some time to appear as I'm not so good at that kind of >thing. > >I may also add more stability stuff like CAPE if I get time. > >I haven't had time to play with these yet, but thought I'd pass on >this great news immediately. > >-- >Laurier Williams >Australian Weather News & Links >http://ausweather.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------------------------------ ________________________________________________________________________ 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: Re: aus-wx: Another cold spell for SE Aust Date: Thu, 1 Jun 2000 21:15:40 +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 I know its long off and therefore not get too excited, but the same GASP model for next Wednesday has a huge tongue of cold air about 1000km SW of WA, and another HIGH at 40' south plus. You never know in 10 days time we could another repeat. Michael > The most recent GASP run is almost as cold in places as last > weekend's outbreak (529 over southern NSW on Sunday night), although > nowhere near as long-lived, and probably not as moist. If last > weekend hadn't existed we'd be getting excited about the prospect of > the best early-season outbreak in years, but we're a bit spoilt now :-) > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ 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: "Patrick Tobin" To: Subject: Re: aus-wx: Another cold spell for SE Aust Date: Thu, 1 Jun 2000 21:50:55 +1000 X-Mailer: Microsoft Outlook Express 4.72.3110.5 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Just checked out the latest MRF - its gone OTT for next Wednesday!! It has a sub 528 pool along the east Gippsland coast and a tongue of -2 850hpa covering SE Aust from SW Vic to the NSW north coast and a smaller 850hpa tongue covering SE Vic (starting in Melbourne) and along the ranges to the NSW central tablelands. It looks like something is brewing.. its almost too good to believe (and may well yet be!!) so soon after this last outbreak (which is also throwing one last sub 540 surge along the NSW coast tonight). Also interesting to note the tendency to a more SSE to SE flow next week (although thats was supposed to happen this week - but it hasn't quite turned out that way). We wait with unexpected anticipation... Patrick -----Original Message----- From: Michael Thompson To: aussie-weather at world.std.com Date: Thursday, 1 June 2000 21:13 Subject: Re: aus-wx: Another cold spell for SE Aust >I know its long off and therefore not get too excited, but the same GASP >model for next Wednesday has a huge tongue of cold air about 1000km SW of >WA, and another HIGH at 40' south plus. You never know in 10 days time we >could another repeat. > >Michael > > >> The most recent GASP run is almost as cold in places as last >> weekend's outbreak (529 over southern NSW on Sunday night), although >> nowhere near as long-lived, and probably not as moist. If last >> weekend hadn't existed we'd be getting excited about the prospect of >> the best early-season outbreak in years, but we're a bit spoilt now :-) >> > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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: "Patrick Tobin" To: Subject: Re: aus-wx: Another cold spell for SE Aust - slight correction Date: Thu, 1 Jun 2000 21:58:23 +1000 X-Mailer: Microsoft Outlook Express 4.72.3110.5 Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Oops.... in the 2nd para of my last post I meant to say... a smaller 850hpa tongue of - 4C covering SE Vic (starting in Melbourne) and along the ranges to the NSW central tablelands. -----Original Message----- From: Michael Thompson To: aussie-weather at world.std.com Date: Thursday, 1 June 2000 21:13 Subject: Re: aus-wx: Another cold spell for SE Aust >I know its long off and therefore not get too excited, but the same GASP >model for next Wednesday has a huge tongue of cold air about 1000km SW of >WA, and another HIGH at 40' south plus. You never know in 10 days time we >could another repeat. > >Michael > > >> The most recent GASP run is almost as cold in places as last >> weekend's outbreak (529 over southern NSW on Sunday night), although >> nowhere near as long-lived, and probably not as moist. If last >> weekend hadn't existed we'd be getting excited about the prospect of >> the best early-season outbreak in years, but we're a bit spoilt now :-) >> > > > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > 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------------------------------ Date: Thu, 1 Jun 2000 22:20:53 +1000 (AEST) From: Jonty Hall To: aussie-weather at world.std.com Subject: Re: aus-wx: argh!!! Sender: aussie-weather-approval at world.std.com Reply-To: aussie-weather at world.std.com Hi Anthony, Vorticity advection is simply the effect of the wind pushing air with a certain value of vorticity downstream. In other words, if for example you are at a certain location with westerly winds and to the west of you there is air with a higher cyclonic vorticity than where you are, then ignoring all other effects, you would see the cyclonic vorticity increase at your location. Of course, there are other effects that will alter vorticity at your location, such as horizontal divergence, tilting of vortex lines (from horizontal to vertical) and baroclinic generation, the latter two being generally insignificant on synoptic scales, but very important on the scales of severe convection and thunderstorms. I'm not sure what the context of the original message was, but advection (and differential advection with height) of vorticity features pretty heavily in mid-latitude theories, such as the quasi-geostrophic theory, being quite a nice and easy to comprehend way of looking at the dynamics of cyclogenesis, movement of lows, frontogenesis and so on. The concept is also used in the tropics, the classic case being the advection of planetary vorticity by tropical cyclone circulations leading to a westward and poleward "beta drift" - this is widely accepted to be an important factor in the deviation of tropical cyclone tracks from observed steering flows. I hope that helps! Cheers, Jonty. ____________________________________________________________________ Jonty Hall jdh at vortex.shm.monash.edu.au CRC for Southern Hemisphere Meteorology Monash University Wellington Road, Clayton, Vic 3168 Ph +61 3 9905 9684 ____________________________________________________________________ On Wed, 31 May 2000, Anthony Cornelius wrote: > Hi Leslie, David and all, > > For those people on the list who are uneducated (ie me!) Could you > please explain the term "vorticity advection." I have heard it a few > times, and I believe some one explained it once before, but I never > quite was able to grasp the term... > > Thanks! > > "Leslie R. Lemon" wrote: > > > > David: > > > > > Les wrote, "positive vorticity advection". > > > > LOL.....yes, you got it!!! I do struggle trying to keep the SH in mind. > > Sorry. Thanks, David for the correction! > > > > Les > > > > ************************ > > Leslie R. Lemon > > Radar, Severe Storms, & Research Meteorologist > > Tel. 816-373-3533, 816-213-3237 > > E-Mail: lrlemon at compuserve.com > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com > > with "unsubscribe aussie-weather your_email_address" in the body of your > > message. > > -----------------------jacob at iinet.net.au------------------------------ > > -- > 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------------------------------