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Storm News
[Index][Aussie-Wx] |
Australian Weather Mailing List Archives: Tuesday, 23 November 1999 |
From Subject
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001 "John Woodbridge" [jrw at pixelcom.net] Supercell ....
002 Ben Quinn [bodie at flatrate.net.au] Cricket Ball Hail!
003 "Jane O'Neill" [cadence at rubix.net.au] Australian Chase Update
004 Ira Fehlberg [jra at upnaway.com] New chase pics
005 "Michael Thompson" [michaelt at ozemail.com.au] Canberra storms
006 Lindsay [writer at lisp.com.au] Brisbane-wx.. cold!!
007 Lindsay [writer at lisp.com.au] aus-wx Cold? Doonah night?
008 Michael Scollay [michael.scollay at telstra.com. US Navy satpics - was "aus-wx: New chase pics"
009 Michael Bath [mbath at ozemail.com.au] ASWA Storm Chase Update
010 Ben Quinn [bodie at flatrate.net.au] Supercell ....
011 Ben Quinn [bodie at flatrate.net.au] BSCH Updates
012 "John Woodbridge" [jrw at pixelcom.net] ASWA storm chase, brisbane
013 Michael Scollay [michael.scollay at telstra.com. GMS5 Satpic Resolution from Different Sites...
014 wbc at ozemail.com.au (Laurier Williams) GMS5 Satpic Resolution from Different Sites...
015 Paul Miracki [pmiracki at powerup.com.au] Severe storms
016 "Paul Graham" [v_notch at hotmail.com] Another supercell...
017 steve baynham [bayns at broad.net.au] severe storm pics
018 Michael Scollay [michael.scollay at telstra.com. GMS5 Satpic Resolution from Different Sites...
019 Michael Scollay [michael.scollay at telstra.com. GMS5 Satpic Resolution from Different Sites...
020 Michael Scollay [michael.scollay at telstra.com. GMS5 Satpic Resolution from Different Sites...
021 Paul Mossman [paulmoss at tpgi.com.au] Rainfall figures
022 "Anthony Spierings" [as029 at powerup.com.au] Brisbane Cell 23/11/99 - Digital Pics
023 "Matt Smith" [ozchase at hotmail.com] Brisbane Cell 23/11/99 - Digital Pics
024 "Matt Smith" [ozchase at hotmail.com] End of Year Storm Chase, Part 1.
025 "Steve" [sselka at ozemail.com.au] Brisbane Cell 23/11/99 - Digital Pics
026 "John Woodbridge" [jrw at pixelcom.net] Brisbane Cell 23/11/99 - Digital Pics
--------------------------------------------------------------------------------------
001
From: "John Woodbridge" [jrw at pixelcom.net]
To: [aussie-weather at world.std.com]
Subject: RE: aus-wx: Supercell ....
Date: Mon, 22 Nov 1999 22:51:13 +1000
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Hi All,
Yes, I observed the storm from 5:00pm to 6:30pm when it died (predictably,
coz that's where I was) at Mt. Crosby, 13km directly North of Ipswich. BoM
had a severe tstorm warning out for the area between Ipswich & Lake
Manchester - Mt. Crosby is slap bang in the middle.
It fair raced across Brisbane valley and had red most of the way. Nice
vertical hard updrafts on the North side, I don't think I would call it a
Supercell (marginal though) as there was no rotation, just a good example of
the rear updraft storm type, propagating NE with Anvil off to the SE and
flanking line to the N/NW. Some nice inflow bands though. High CC
lightning in excess of 1 per second for most of it's life, visible just
under the anvil in the updraft region. Not much CG.
It actually died when it ran into the D'guilar Range. Amazing how a 500m
ridge can destroy storm inflow & kill off convection. May also have
something to do with the Sea Breeze dying off as well.
Only scored a small shower of very large drops at Mt. Crosby (a couple of
mm's), strange because the radar showed red directly over me at the time.
(Maybe not so strange, the drops were very large - the sort that leave 10cm
splatters).
Drizzling now from the left over of that quite magnificent squall line that
appeared on radar around 9:00pm from Warwick right up through Kingaroy.
Broke up though. The loop will be good viewing - guess Ben will save it for
us.
John.
>snip
Hey Paul, Everyone..
This storm was a beast!!! As soon as i sent the warning to the list i
walked outside (still a fair bit of light around) to be greeted by
lightning every second! Even more frequent for short periods! Most of
the lightning was in cloud lighting (only 19 whites on the tracker when
the lightning was at its peak), but boy were the anvil crawlers
spectacular!!!! And get this.. at approx. 6:30pm i saw lightning run
from one end of the storm to the other (right up the top of the anvil)
and then strike (In a forked fashion) waaaaaaaaaay outside of the SE end
of the storm!!! AND I WAS LOVING EVERY PRECIOUS SECOND OF IT!!!!!!
I watched the storm visually from when its development and until it
dissipated..and given that it lasted for well over 2 hours, maintained
high intensities on radar for long periods (and moved NE when from
memory steering winds are more NW or WNW) and visually appeared
veeeeeery nice (rock hard updrafts on the northern side of the storm -
and updraft after updraft after updraft going up) i agree with Paul that
it could have been/probably was a supercell..
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002
Date: Mon, 22 Nov 1999 23:17:41 +1100
From: Ben Quinn [bodie at flatrate.net.au]
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To: aussie-weather at world.std.com
Subject: Re: aus-wx: Cricket Ball Hail!
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Hey Paul, everyone (too many emails from me today i know! But there is
so much to say!)..
I spoke to Anthony earlier this evening and he described a storm that
they chased west of Dalby and then eventually in Dalby itslef as
"Spectacular" with a MOFO wall cloud and generally spectacular
features.. by the way he was talking the storm had severe winds, and
they (Anthony, James and Rosco) are going to stick around in the eastern
downs tomorrow to survey the damage (if any - but i think they are
confident there will be damage) from the storm..
I think it was Mathew Piper that described the storm as "the best he's
ever been in" .. so it was certainly a strong storm ..
There was a lot of background noise when i spoke to Anthony, but i think
it was Jimmy and his group that saw two corkscrew (rotating) updrafts on
the darling downs during the afternoon..
Unfortunately (or fortunately - depends how you look at it) the cricket
ball hail fell some distance SE of where the chasers were (100km+)..
BTW, BOM said intense echo's were up to 10km in the storm SW of Brisbane
during the afternoon.. that's not cloudtops - i estimate cloudtops may
have been somewhere in the order of 14-15km at one stage..
Paul Mossman wrote:
>
> Gee....sure it wasnt one of Adam Gilchrists 6's??
>
> Hope the chasers are there and can confirm this....... would be
> interesting. Pictures would be even better.
>
> Paul.
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003
From: "Jane O'Neill" [cadence at rubix.net.au]
To: "WX-CHASE" [WX-CHASE at POSTOFFICE.CSO.UIUC.EDU]
"Aussie Weather"
Subject: aus-wx: Australian Chase Update
Date: Tue, 23 Nov 1999 00:40:40 +1100
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The boys in Queensland have been having an absolutely fantastic time over
the last 3 days (which were their first 3 days) - so good in fact, that
Andrew McDonald has threatened more than once to ring me up and dictate 5
handwritten pages over the phone. So far though, he hasn't had time - he's
been too busy chasing storms in southern Queensland!!! There was major
chaser convergence in Dalby tonight (I think).
After a rain sodden drive to Canberra yesterday (I can highly recommend
Rain-X, you can drive through a 10-20 without using your wipers, and it
works brilliantly when semis rush past going in the other direction!! -
available in Safeway & Woolworth stores), today dawned with Cu moving from
the SW with a surface NW wind. Some of the cumulus began congesting towards
4pm, but it didn't look *that* interesting until just before dusk when we
got some 'almost' turkeys going up. Sitting on the front doorstep of the
house in Narrabundah, I was looking east at nothing particularly
interesting - went out the back, couldn't see anything.........until there
was a rumble of thunder - and I was out the door and across the street with
video in hand until I realised just how close the cell was and that I was
actually standing under the edge of the anvil. This storm will forever be
known as "The Cb that evaded a storm chaser by hiding behind a bloody big
pine tree". Sue (whose house I'm staying in) suddenly discovered what drives
a storm chaser . I shot back inside, took 2 mouthfuls of the cup of tea
I'd just made & into the car & up to the lookout on top of Red Hill.
1.5-2cm hail just as I got there - wind driven and bouncing across the
road!! -was talking to Andrew at the time, who handed the phone to Jimmy
(that's 'Hail Jimmy' for those who don't know). Some heavy rain for a
couple of minutes.
Sat up there for an hour or so watching 3 cells move from the NW to the SE -
the first with a nice flanking line, and the 3rd which had a well defined
prong for a short time nicely illuminated by lightning. Temperature dropped
from 21.4C to 12.1C in an hour.
Jane ONeill
Melbourne - Canberra - South Coast - Queensland (somewhere!)
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004
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Date: Mon, 22 Nov 1999 09:33:38 +0800
To: aussie-weather at world.std.com
From: Ira Fehlberg [jra at upnaway.com]
Subject: Re: aus-wx: New chase pics
Sender: aussie-weather-approval at world.std.com
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Cheers for the kind words Phil!!!!
Ira Fehlberg
At 11:20 22/11/99 +0930, you wrote:
>>Hi all,
>> Well i finally put up my pics of the chase Mike and i did on
>>November the 2nd. Check em out at
>>http://www.upnaway.com/~jra/weather.html
>
>Those are beautiful pics Ira. I really like the sequence as the anvil
>rises over the horizon and 'moves towards the camera'.
>
>Hope you get your supercell soon :)
>
>Phil 'Paisley' Bagust
>paisley at cobweb.com.au
>http://www.chariot.net.au/~paisley2
>
>
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005
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Canberra storms
Date: Tue, 23 Nov 1999 08:42:31 +1100
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Unfortunately for the Illawarra that unbreakable rule
held firm. The NW wind took away all surface moisture, humidity was down to
30%, quite high for a NW actually, but still too low for any action. Here in
the southern Illawarra we have had only 2 storms so far this season, one
was a 2 lightning flash wonder, and the other associated with a low
caused a flash flood.
Everybody talks how great the season is, but for here it is the worst in
my living memory.
Michael
Not a day that I thought would have been all
that productive this far south with the dreaded NW blowing strongly for most
of the day (has died off now - perhaps to become inflow?) and DP's around 6 or
7 (currently 7). I guess it goes to reinforce that unbreakable rule of weather
- that there are no unbreakable rules of weather.
Patrick
006
Date: Mon, 22 Nov 1999 07:33:23 -0800
From: Lindsay [writer at lisp.com.au]
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Subject: Re: aus-wx: Brisbane-wx.. cold!!
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Didn't make 12 degrees here in Blackheath for Sunday the 21st. Wasn't
that bad really, bit chilly but alright.
Lindsay P.
Paul Mossman wrote:
>
> Hehehe poor Q'Landers - here it is about 30c with a dew point of 25.
>
> Hmm nice and warm........
>
> :-)
>
> Paul at a fab Darwin.
>
> ---------------------------------------------------------------
>
> Name: vcard.vcf
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> Encoding: 7bit
> Description: Card for Paul Mossman
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007
Date: Mon, 22 Nov 1999 07:28:44 -0800
From: Lindsay [writer at lisp.com.au]
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Subject: Re: aus-wx: aus-wx Cold? Doonah night?
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Fascinating Stuff,
Always like a good mountains snow story. Some of my older mates at
tennis have stories of knee high snow and more around the upper Blue
Mountains although not being weather junkies like us, I am not sure if
this was drift snow or general ground cover, they seemed adamant that
during the 50's through 80's they had some very good deep falls. Oh
well, maybe next year we might get a decent dump again.
Lindsay Pearce
Adam Mayo wrote:
>
> Hi Lindsay and everyone,
>
> We have some photos taken in Fourth Avenue, North Katoomba during that
> snow fall in 1986. It was so deep that our mother couldn't leave the
> property for two days. She had sleepers on the drive and it was too
> steep and slippery to walk down or to even drive down. There has
> never been as much snow there since, even though she has snow just
> about every second year. This year for the June Long Weekend.
>
> Judy Mayo.
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008
Date: Tue, 23 Nov 1999 11:36:33 +1100
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
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To: aussie-weather at world.std.com
Subject: Re: aus-wx: US Navy satpics - was "aus-wx: New chase pics"
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[snip]
Michael Scollay wrote on Mon, 22 Nov 1999 11:26:07 +1100:
>
> 1) Archive reports last gmsc/d image (partly intact) was
> labled at 199911210424 UTC. Last gmsc/d totally intact
> image was labled at 199911210131. This means no update
> of gmsc/d evident in the last 18-19 hrs. Can anyone else
> please confirm this or otherwise comment?
Thanks to those who confirmed this. An update...as of the
gmsd image labled 19991122222359 UTC downloaded by the
archive at 19991122233320, the NPMOC gmsc/d satpics are
back on-line. NPMOC has stated no reason for this outage.
I've found some other satpic archives in Japan that I'm
analysing for "mirroring", access performance and
resolution. I will report the findings soon.
[snip]
P.S. The archive has the storm-chase areas covered with
all narrow-scale radar and jtwc "full" satpics at 8.07km
/pixel resolution instead of the gmsc/d resolution at
5.22km/pixel.
Michael Scollay mailto:michael.scollay at telstra.com.au
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009
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Date: Tue, 23 Nov 1999 13:25:47 +1100
To: aussie-weather at world.std.com
From: Michael Bath [mbath at ozemail.com.au]
Subject: aus-wx: ASWA Storm Chase Update
Sender: aussie-weather-approval at world.std.com
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Jimmy and Matthew Piper are heading for Gympie from Dalby. Not sure if the
other chasers are following the same route, but it is likely. If you would
like to provide an update to them the numbers are:
JD: 0408 020 468
MP: 0414 393 267
James Harris and Matt Smith satyed overnight here at my place at
Wollongbar, arriving around 10.30pm after some action on the southern
Darling Downs in QLD. They are now on their way back to Sydney but will
rejoin the chase on Friday or Saturday.
In NE NSW a field of cumulus has developed in the past hour with some
congestus and what appears to be some Cb to the far south now. Plenty of
high cloud about again today with very warm and humid conditions (currently
27.5). The activity to the south seems to be on the boundary of the high
cloud / clear skies.
regards, Michael
==================================================================
Michael Bath mailto:mbath at ozemail.com.au
Wollongbar NSW 2477 http://australiansevereweather.simplenet.com/
Australia http://www.lightningphotography.com/
Secretary ASWA Inc. http://www.severeweather.asn.au/
==================================================================
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010
Date: Tue, 23 Nov 1999 13:38:59 +1100
From: Ben Quinn [bodie at flatrate.net.au]
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Subject: Re: aus-wx: Supercell ....
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Hey John, everyone..
I spoke to Anthony this morning and he said that a BOM person said on
the phone to a radio station that it was a supercell.. I spoke to Jeff
at the severe weather section this morning and he had not yet gone over
the data for the storm (and didn't know anything about it being
confirmed as a supercell).. but he said that the storm had a BWER at one
stage.. they might be interested to hear that the storm had no real
visual signs of rotation..
I have put a small writeup at BSCH about the storm with a radar loop,
and also loops of the squall line that John referred to last night -
looked quite nice on radar for a short time, but broke up fairly
quickly.. some nice lightning visible from my location as it approached
(very very bright - probably 80-90% of the lightning i saw was Cg
lightning).. but it completely fizzed by the time it hit the coast, with
some drizzle and a few claps of thunder here..
http://www.bsch.simplenet.com/products/recentevents.htm
John Woodbridge wrote:
>
> Hi All,
>
> Yes, I observed the storm from 5:00pm to 6:30pm when it died (predictably,
> coz that's where I was) at Mt. Crosby, 13km directly North of Ipswich. BoM
> had a severe tstorm warning out for the area between Ipswich & Lake
> Manchester - Mt. Crosby is slap bang in the middle.
>
> It fair raced across Brisbane valley and had red most of the way. Nice
> vertical hard updrafts on the North side, I don't think I would call it a
> Supercell (marginal though) as there was no rotation, just a good example of
> the rear updraft storm type, propagating NE with Anvil off to the SE and
> flanking line to the N/NW. Some nice inflow bands though. High CC
> lightning in excess of 1 per second for most of it's life, visible just
> under the anvil in the updraft region. Not much CG.
>
> It actually died when it ran into the D'guilar Range. Amazing how a 500m
> ridge can destroy storm inflow & kill off convection. May also have
> something to do with the Sea Breeze dying off as well.
>
> Only scored a small shower of very large drops at Mt. Crosby (a couple of
> mm's), strange because the radar showed red directly over me at the time.
> (Maybe not so strange, the drops were very large - the sort that leave 10cm
> splatters).
>
> Drizzling now from the left over of that quite magnificent squall line that
> appeared on radar around 9:00pm from Warwick right up through Kingaroy.
> Broke up though. The loop will be good viewing - guess Ben will save it for
> us.
>
> John.
> >snip
>
> Hey Paul, Everyone..
>
> This storm was a beast!!! As soon as i sent the warning to the list i
> walked outside (still a fair bit of light around) to be greeted by
> lightning every second! Even more frequent for short periods! Most of
> the lightning was in cloud lighting (only 19 whites on the tracker when
> the lightning was at its peak), but boy were the anvil crawlers
> spectacular!!!! And get this.. at approx. 6:30pm i saw lightning run
> from one end of the storm to the other (right up the top of the anvil)
> and then strike (In a forked fashion) waaaaaaaaaay outside of the SE end
> of the storm!!! AND I WAS LOVING EVERY PRECIOUS SECOND OF IT!!!!!!
>
> I watched the storm visually from when its development and until it
> dissipated..and given that it lasted for well over 2 hours, maintained
> high intensities on radar for long periods (and moved NE when from
> memory steering winds are more NW or WNW) and visually appeared
> veeeeeery nice (rock hard updrafts on the northern side of the storm -
> and updraft after updraft after updraft going up) i agree with Paul that
> it could have been/probably was a supercell..
>
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011
Date: Tue, 23 Nov 1999 13:47:06 +1100
From: Ben Quinn [bodie at flatrate.net.au]
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To: aussie-weather at world.std.com, WX-TALK at POSTOFFICE.CSO.UIUC.EDU,
WX-CHASE at POSTOFFICE.CSO.UIUC.EDU
Subject: aus-wx: BSCH Updates
Sender: aussie-weather-approval at world.std.com
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Hey, Ben here..
Quite a large BSCH update..
85 new pictures added to the photography section:
http://www.bsch.simplenet.com/pictures/picturegallerynew.htm
167 new pictures added to the Spectacular Images Section (A breakdwown
of these images: 44 thunderstorm images, 14 cyclone/hurricane movies,
109 assorted spectacular images)
http://www.bsch.simplenet.com/archiveddata/spectacular.htm
173 products added to the "other products" section of the model products
area.. a fair few of these products are for the USA, and the rest for
other regions around the world
http://www.bsch.simplenet.com/modelproducts/otherproducts.htm
A JAVA weather chat added, linked to from the main menu
http://www.bsch.simplenet.com/weatherchat.htm
An assortment of changes to the BSCH Forecasts
http://www.bsch.simplenet.com/products/qldforecasts.htm
And a what's new section added, linked to from the main menu
http://www.bsch.simplenet.com/whatsnew.htm
012
From: "John Woodbridge" [jrw at pixelcom.net]
To: [aussie-weather at world.std.com]
Subject: RE: aus-wx: ASWA storm chase, brisbane
Date: Tue, 23 Nov 1999 13:48:12 +1000
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Hi All,
Mmmm.. Toowoomba is looking like the place to be at the moment, with a bit
of line forming on radar. Also, looking South from Sumner, a very nice
looking line of Cg building all the way along the border ranges (this could
be marking a SE change). What we need now is a nice little NE sea breeze
and it will all happen. Currently almost dead calm.
John.
>snip
In NE NSW a field of cumulus has developed in the past hour with some
congestus and what appears to be some Cb to the far south now. Plenty of
high cloud about again today with very warm and humid conditions (currently
27.5). The activity to the south seems to be on the boundary of the high
cloud / clear skies.
regards, Michael
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013
Date: Tue, 23 Nov 1999 15:22:51 +1100
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
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To: Aussie Weather [aussie-weather at world.std.com]
Subject: aus-wx: GMS5 Satpic Resolution from Different Sites...
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In my search for a reliable, up-to-date and high resolution satpic
site for populating the ASWA archive, I've calculated the apparent
resolution of each site found and presented the results in the
following table. This was performed by taking a crop of each image
between known geographic points, say Brisbane to Perth and then
working out the number of kilometers covered by the average pixel
density between those points. With GMS5, you'll find that the best
resolution is found at the equator directly below the orbit of the
satellite (GMS5 is 140E). I've tried to keep the comparison to a
Standard Measure (SM) of Brisbane to Perth ($) but occasionally,
I had to use Adelaide to Perth (%), Adelaide to Brisbane (#) and
once, Darwin to Singapore ( at ). Distances were obtained from Qantas
as the flight distance, which in most cases follows the "great circle"
route and happens to be the shortest distance between two points.
=========================================================================
URL (*.jpg means an archive of multiple images) km/pixel SM
-------------------------------------------------------------------------
http://www.npmoc.navy.mil/satimages/gmsc.jpg 5.22 %
http://www.npmoc.navy.mil/satimages/gmsd.jpg 5.22 #
http://www.npmoc.navy.mil/satimages/gmsfull.jpg 11.8 $
http://www.npmoc.navy.mil/products/jtwc/jtgio_ir2.jpg 6.64 $
http://www.npmoc.navy.mil/products/jtwc/archive/g5iwp/*.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/austir/*.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/austwv/*.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/fulldiskir/*.jpg 15.8 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/fullacctir/*.jpg 4.74 at
http://www.sat.dundee.ac.uk/pdus/JI/latest.jpg 9.51 $
ftp://ftp.ece.jcu.edu.au/JCUMetSat/ausvlast.gif 9.41 $
ftp://ftp.ece.jcu.edu.au/JCUMetSat/seausllast.gif 8.94 $
ftp://rsd.gsfc.nasa.gov/pub/Weather/GMS-5/jpg/ir1/4km/*.jpg 13.1 $
/GMS-5/gif/mapped/ir1/australia/0latest.gif 7.04 $
http://www.bom.gov.au/weather/national/satellite/gilatest.shtml 11.8 $
=========================================================================
Given that the "yoko.npmoc...fullacctir" extends from 20N to 20S,
it is not surprising that its resolution approaches the maximum
possible from IR GMS5 (4km). For the latitudes of major interest,
"npmoc...gmsc/d" remain the highest resolution and best looking of
all images. Pity that NPMOC's been unreliable of late. The "npmoc...
jtwc" product set is also superior but this is met also by those
images provided by "yoko.npmoc". Given that a full archive is also
available from yoko, this seems to be the best backup choice. All
NPMOC images are updated hourly or even half-hourly. "rsd.gsfc...
mapped..." is also a good choice but the contrast of this image
is inferior to that provided by NPMOC. "...dundee..." can also
provide full-resolution images by special request that contain
temperature data, wind flow etc. At 36MB per image, this would
be a last resort for high resolution images at 3-hourly intervals.
Another possible problem for publication is overlaying satpics
with the BoM's MSL Analysis chart. This is only possible using
the projection given by the BoM in their satpic sourced by JMA.
Other projections used are actual and Mercator's (yoko austir
and austwv among others.
>From the up-to-date and frequency perspective, "yoko.npmoc"
and "npmoc...jtwc" are by far the best, followed by "dundee",
"jcu" and "bom" only because their images are less frequent.
The "nasa" site is way out of date and not worth a hit for
ages. If there are any other good sites, please let me know.
Michael Scollay mailto:michael.scollay at telstra.com.au
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014
From: wbc at ozemail.com.au (Laurier Williams)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: GMS5 Satpic Resolution from Different Sites...
Date: Tue, 23 Nov 1999 06:25:35 GMT
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On Tue, 23 Nov 1999 15:22:51 +1100, Michael Scollay
wrote:
>In my search for a reliable, up-to-date and high resolution satpic
>site for populating the ASWA archive, I've calculated the apparent
>resolution of each site found and presented the results in the
>following table.
snip
Michael, an excellent summary. Thanks for some very interesting
number-crunching. Some additions:
Full disk IR
http://www.npmoc.navy.mil/products/jtwc/GMSFull_ir2.jpg -- resolution
is 1700x1700 compared to 1100x1100 for
http://www.npmoc.navy.mil/satimages/gmsfull.jpg (which you list)
Full disk IR
http://www.npmoc.navy.mil/products/jtwc/archive/jtgio/ is archive for
http://www.npmoc.navy.mil/products/jtwc/jtgio_ir2.jpg (which you list)
Full disk Vis
http://www.npmoc.navy.mil/products/jtwc/GMSFull_vis.jpg and its
archive at http://www.npmoc.navy.mil/products/jtwc/archive/g5vwp/
Full disk Water Vapour
http://www.npmoc.navy.mil/products/jtwc/GMSFull_ir3.jpg and its
archive at http://www.npmoc.navy.mil/products/jtwc/archive/wpwv/
Full disk IR
http://www.sat.dundee.ac.uk/pdus/JI/ is archive for
http://www.sat.dundee.ac.uk/pdus/JI/latest.jpg (which you list)
Full disk Vis
http://www.sat.dundee.ac.uk/pdus/JV/ which is archive for
http://www.sat.dundee.ac.uk/pdus/JV/latest.jpg
Aus region Vis
http://www.yoko.npmoc.navy.mil/nsds-e20shots/austvis/
The Yokohama set has the great advantage of a standard set of
coordinates for Vis, IR and WV which is local to Oz and hourly. The
enhanced detail south of Australia, thanks to the flat projection, is
useful, too.
--
Laurier Williams
Australian Weather Links and News
http://www.ozemail.com.au/~wbc/
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015
Date: Tue, 23 Nov 1999 16:30:36 +1000
From: Paul Miracki [pmiracki at powerup.com.au]
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To: aussie-weather at world.std.com
Subject: aus-wx: Severe storms
Sender: aussie-weather-approval at world.std.com
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Hey all, Nice little storm to my south. Looks quite good actually.
IDW10Q00
BUREAU OF METEOROLOGY
Queensland Region
Brisbane Office
TOP PRIORITY
SEVERE THUNDERSTORM WARNING
Issued by the Bureau of Meteorology, Brisbane
at 4:22pm EST on Tuesday the 23rd of November 1999
For the Southeast Coast
A severe storm has been observed on radar near Tamborine moving
north-eastwards
at 30 kph. It is expected to weaken as it reaches the coastal plains and
then
pass out to sea.
People are advised to secure outside items, move cars under cover and
seek
shelter.
The next warning will be issued at 5 pm.
**** NOT FOR BROADCAST AFTER 5 pm ****
This warning is also available by telephone on 1900 969 921 at a cost
of around
75 cents per minute.
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016
X-Originating-IP: [210.84.1.69]
From: "Paul Graham" [v_notch at hotmail.com]
To: aussie-weather at world.std.com
Subject: aus-wx: Another supercell...
Date: Mon, 22 Nov 1999 22:34:44 PST
Sender: aussie-weather-approval at world.std.com
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Just noticed what I'm sure is another supercell on the Brisbane radar - even
showed a distinctive spiral echo at one stage.
Heading towards Gold Coast, I think.
- Paul.
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017
X-Sender: bayns at mail.broad.net.au
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Date: Tue, 23 Nov 1999 17:23:59 +1000
To: aussie-weather at world.std.com
From: steve baynham [bayns at broad.net.au]
Subject: aus-wx: severe storm pics
Sender: aussie-weather-approval at world.std.com
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hey all,
was up on the roof this arvo with the camcorder.
you can see shots of the storm that produced hail north of gold coast!
see for your self, couldn't see a hail shaft though, i had to come down cos of rain fell everywhere and couldn't see it:( there are more to come from this later.
http://www.angelfire.com/ok2/gany/images/2311991.jpg
http://www.angelfire.com/ok2/gany/images/2311992.jpg
http://www.angelfire.com/ok2/gany/images/2311993.jpg
http://www.angelfire.com/ok2/gany/images/2311994.jpg
http://www.angelfire.com/ok2/gany/images/2311995.jpg
http://www.angelfire.com/ok2/gany/images/2311996.jpg
http://www.angelfire.com/ok2/gany/images/2311997.jpg
http://www.angelfire.com/ok2/gany/images/2311998.jpg
http://www.angelfire.com/ok2/gany/images/2311999.jpg
http://www.angelfire.com/ok2/gany/images/23119910.jpg
radar : http://www.angelfire.com/ok2/gany/images/IDR50lp3.gif
steve
gold coast
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018
Date: Tue, 23 Nov 1999 18:36:03 +1100
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
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To: aussie-weather at world.std.com
Subject: Re: aus-wx: GMS5 Satpic Resolution from Different Sites...
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Laurier Williams wrote on Tue, 23 Nov 1999 06:25:35 GMT:
>
> On Tue, 23 Nov 1999 15:22:51 +1100, Michael Scollay
> wrote:
>
> >In my search for a reliable, up-to-date and high resolution satpic
> >site for populating the ASWA archive, I've calculated the apparent
> >resolution of each site found and presented the results in the
> >following table.
>
> [snip]
>
> Michael, an excellent summary. Thanks for some very interesting
> number-crunching.
Thanks Laurier. I failed to note all that I retrieved and in some
cases, I put down the archive of the images rather than the link to
the latest satpic of that archive. These days, the ASWA archive
scripts that run every hour attempt to "mirror" the remote archive
where it exists and if possible alter the destination filename to
Y2K compatibility e.g. .../YYYYMMDDHHMM.
Some additions:
>
> Full disk IR
> http://www.npmoc.navy.mil/products/jtwc/GMSFull_ir2.jpg -- resolution
> is 1700x1700 compared to 1100x1100 for
> http://www.npmoc.navy.mil/satimages/gmsfull.jpg (which you list)
The jtwc image above is mirrored in the ASWA archive from the NPMOC
archive noted incorrectly in previous mail, but now corrected as;
http://www.npmoc.navy.mil/products/jtwc/archive/g5iwp/ *.jpg 8.07km/pixel.
> Full disk IR
> http://www.npmoc.navy.mil/products/jtwc/archive/jtgio/ is archive for
> http://www.npmoc.navy.mil/products/jtwc/jtgio_ir2.jpg (which you list)
That's a good archive to add. Given that jtwc seems more reliable than
gmsc/d, the ASWA archive can mirror this with no image loss and this
image gives 6.64km/pixel, would it be better to abandon gmsc/d in
favour of jtgio alone?
[snip other NPMOC jtwc archives and dundee archives - thanks]
I delved into all of the noted archives but didn't analyse any
further since I already had a comprehensive list. I also ignored
visual satpics everywhere since are useless for a 24hr archive.
But, visual satpics are "taken" at a higher resolution by GMS5
giving beautiful images. When converted to the images found at
the noted internet sites, I've yet to notice one with a higher
resolution than the IR/WV satpics. Fundamental limitation is
the size of the file able to be archived, downloaded and
displayed effectively on most browsers.
> Aus region Vis
> http://www.yoko.npmoc.navy.mil/nsds-e20shots/austvis/
>
> The Yokohama set has the great advantage of a standard set of
> coordinates for Vis, IR and WV which is local to Oz and hourly. The
> enhanced detail south of Australia, thanks to the flat projection, is
> useful, too.
Is the flat projection preferred for the ASWA archive? If so,
please respond.
As for any increased detail south of Australia, it may be a feature
of the conversion software. The detail isn't enhanced unless they've
been really clever with conversion from the full-earth-view. I've yet
to analyse the image in detail but it looks as if they've used some
algorithm to generate the detail "in-between" at the higher latitudes.
At the equator, this image gives around 5km/pixel. At Perth's latitude,
about 8km/pixel and at 50S, about 12km/pixel. So the algorithm needs
to "fill-in" at least one additional pixel at 50S to every "real" pixel
in order to flatten the image out so that it displays at the same
resolution all over. The "clever" technique would be to go back to
the source image kept at maximum resolution and convert it to the flat
jpeg from there. That would give about 8km/pixel at 50S and 4km/pixel
at the equator in theory but they would need to do some pixel averaging
at the equator to fit the detail into the desired image width yielding
around 5km/pixel.
Michael Scollay mailto:michael.scollay at telstra.com.au
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019
Date: Tue, 23 Nov 1999 18:38:49 +1100
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m)
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To: aussie-weather at world.std.com
Subject: Re: aus-wx: GMS5 Satpic Resolution from Different Sites...
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Corrected table for direct browser activiation.
=========================================================================
URL (*.jpg means an archive of multiple images) km/pixel SM
-------------------------------------------------------------------------
http://www.npmoc.navy.mil/satimages/gmsc.jpg 5.22 %
http://www.npmoc.navy.mil/satimages/gmsd.jpg 5.22 #
http://www.npmoc.navy.mil/satimages/gmsfull.jpg 11.8 $
http://www.npmoc.navy.mil/products/jtwc/jtgio_ir2.jpg 6.64 $
http://www.npmoc.navy.mil/products/jtwc/archive/g5iwp/ *.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/austir/ *.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/austwv/ *.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/fulldiskir/ *.jpg 15.8 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/fullacctir/ *.jpg 4.74 at
http://www.sat.dundee.ac.uk/pdus/JI/latest.jpg 9.51 $
ftp://ftp.ece.jcu.edu.au/JCUMetSat/ausvlast.gif 9.41 $
ftp://ftp.ece.jcu.edu.au/JCUMetSat/seausllast.gif 8.94 $
ftp://rsd.gsfc.nasa.gov/pub/Weather/GMS-5/jpg/ir1/4km/*.jpg 13.1 $
/GMS-5/gif/mapped/ir1/australia/0latest.gif 7.04 $
http://www.bom.gov.au/weather/national/satellite/gilatest.shtml 11.8 $
=========================================================================
Michael Scollay mailto:michael.scollay at telstra.com.au
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020
Date: Tue, 23 Nov 1999 19:10:40 +1100
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m)
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To: aussie-weather at world.std.com
Subject: Re: aus-wx: GMS5 Satpic Resolution from Different Sites...
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Corrected table for direct browser activation (again - forgot one:-)...
=========================================================================
URL (*.jpg means an archive of multiple images) km/pixel SM
-------------------------------------------------------------------------
http://www.npmoc.navy.mil/satimages/gmsc.jpg 5.22 %
http://www.npmoc.navy.mil/satimages/gmsd.jpg 5.22 #
http://www.npmoc.navy.mil/satimages/gmsfull.jpg 11.8 $
http://www.npmoc.navy.mil/products/jtwc/jtgio_ir2.jpg 6.64 $
http://www.npmoc.navy.mil/products/jtwc/archive/g5iwp/ *.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/austir/ *.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/austwv/ *.jpg 8.07 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/fulldiskir/ *.jpg 15.8 $
http://www.yoko.npmoc.navy.mil/nsds-e20shots/fullacctir/ *.jpg 4.74 at
http://www.sat.dundee.ac.uk/pdus/JI/latest.jpg 9.51 $
ftp://ftp.ece.jcu.edu.au/JCUMetSat/ausvlast.gif 9.41 $
ftp://ftp.ece.jcu.edu.au/JCUMetSat/seausllast.gif 8.94 $
ftp://rsd.gsfc.nasa.gov/pub/Weather/GMS-5/jpg/ir1/4km/ *.jpg 13.1 $
/GMS-5/gif/mapped/ir1/australia/0latest.gif 7.04 $
http://www.bom.gov.au/weather/national/satellite/gilatest.shtml 11.8 $
=========================================================================
Michael Scollay mailto:michael.scollay at telstra.com.au
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021
Date: Tue, 23 Nov 1999 18:06:36 +0930
From: Paul Mossman [paulmoss at tpgi.com.au]
X-Mailer: Mozilla 4.08 [en] (Win98; I)
To: aussie-weather at world.std.com
Subject: aus-wx: Rainfall figures
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Howdy all.
Another 10mm overnight
7mm in heavy rain this arvo.
Other totals of 60 - 70mm for yesterday including Cape Don AWS with 83mm
Have a look at the weekly tropical note from the BOM. They predict the
La Nian events to strengthen, with Monsoonal activity starting in West
Indonesia advancing to here by the 2nd week in December.
Paul at Darwin.
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022
From: "Anthony Spierings" [as029 at powerup.com.au]
To: "Aussie-Weather" [aussie-weather at world.std.com]
Subject: aus-wx: Brisbane Cell 23/11/99 - Digital Pics
Date: Tue, 23 Nov 1999 20:06:50 +1000
X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0
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Hello aus-wx,
Below are links to some pictures of a small storm cell over Brisbane.
Pictures are from the northern outskirts looking south east using a digital
camera. Images were taken around 18:30 local time.
http://www.powerup.com.au/~as029/storm/991123_1.jpg
http://www.powerup.com.au/~as029/storm/991123_2.jpg
http://www.powerup.com.au/~as029/storm/991123_3.jpg
http://www.powerup.com.au/~as029/storm/991123_4.jpg
I have boxed an area in image 4 round what I think is a Pileus. Opinions
please. (I know that it is hard to see. The zoom on the camera is not all
that good.)
Regards,
Anthony Spierings
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023
X-Originating-IP: [203.102.212.6]
From: "Matt Smith" [ozchase at hotmail.com]
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Brisbane Cell 23/11/99 - Digital Pics
Date: Tue, 23 Nov 1999 21:25:19 EST
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
nice photos Anthony! Yes that is Pileus, you would most likely find other
examples at http://www.australiansevereweather.simplenet.com as well.
Matt Smith
>From: "Anthony Spierings"
>Reply-To: aussie-weather at world.std.com
>To: "Aussie-Weather"
>Subject: aus-wx: Brisbane Cell 23/11/99 - Digital Pics
>Date: Tue, 23 Nov 1999 20:06:50 +1000
>
>
>Hello aus-wx,
>
>Below are links to some pictures of a small storm cell over Brisbane.
>Pictures are from the northern outskirts looking south east using a digital
>camera. Images were taken around 18:30 local time.
>
>http://www.powerup.com.au/~as029/storm/991123_1.jpg
>http://www.powerup.com.au/~as029/storm/991123_2.jpg
>http://www.powerup.com.au/~as029/storm/991123_3.jpg
>http://www.powerup.com.au/~as029/storm/991123_4.jpg
>
>I have boxed an area in image 4 round what I think is a Pileus. Opinions
>please. (I know that it is hard to see. The zoom on the camera is not all
>that good.)
>
>Regards,
>
>Anthony Spierings
>
>
>
>
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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> -----------------------jacob at iinet.net.au------------------------------
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024
X-Originating-IP: [203.102.212.6]
From: "Matt Smith" [ozchase at hotmail.com]
To: aussie-weather at world.std.com
Subject: aus-wx: End of Year Storm Chase, Part 1.
Date: Tue, 23 Nov 1999 21:31:12 EST
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi Everyone
Myself and James Harris made it back safely from Michael Bath's place where
we stayed last night.
I have written up a chase report, most of it i wrote in a diary i kept of
each day to keep track on what happened each day. Myself and James are
heading somewhere at Midday Friday for part 2 :)
http://www.braenet.com.au/~disarm/1999/november/EOYC1.html
Go there for the report, Happy reading!
Matt Smith
(Hope the other guys had a good day today, i think they should go to the
sunshine coast for a day or 2 , then head to central NSW for the weekend,
well.. thats what i would do at this stage :)
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025
From: "Steve" [sselka at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Brisbane Cell 23/11/99 - Digital Pics
Date: Tue, 23 Nov 1999 21:31:43 +1100
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what sort of camera u use Anthony?
Steve Ellangowan
----- Original Message -----
From: Matt Smith [ozchase at hotmail.com]
To: [aussie-weather at world.std.com]
Sent: Wednesday, 24 November 1999 1:25:pm
Subject: Re: aus-wx: Brisbane Cell 23/11/99 - Digital Pics
> nice photos Anthony! Yes that is Pileus, you would most likely find other
> examples at http://www.australiansevereweather.simplenet.com as well.
>
> Matt Smith
>
> >From: "Anthony Spierings"
> >Reply-To: aussie-weather at world.std.com
> >To: "Aussie-Weather"
> >Subject: aus-wx: Brisbane Cell 23/11/99 - Digital Pics
> >Date: Tue, 23 Nov 1999 20:06:50 +1000
> >
> >
> >Hello aus-wx,
> >
> >Below are links to some pictures of a small storm cell over Brisbane.
> >Pictures are from the northern outskirts looking south east using a
digital
> >camera. Images were taken around 18:30 local time.
> >
> >http://www.powerup.com.au/~as029/storm/991123_1.jpg
> >http://www.powerup.com.au/~as029/storm/991123_2.jpg
> >http://www.powerup.com.au/~as029/storm/991123_3.jpg
> >http://www.powerup.com.au/~as029/storm/991123_4.jpg
> >
> >I have boxed an area in image 4 round what I think is a Pileus. Opinions
> >please. (I know that it is hard to see. The zoom on the camera is not
all
> >that good.)
> >
> >Regards,
> >
> >Anthony Spierings
> >
> >
> >
> >
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> > -----------------------jacob at iinet.net.au------------------------------
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026
From: "John Woodbridge" [jrw at pixelcom.net]
To: [aussie-weather at world.std.com]
Subject: RE: aus-wx: Brisbane Cell 23/11/99 - Digital Pics
Date: Tue, 23 Nov 1999 22:18:27 +1000
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Ho Anthony,
Yes, and what a spectacular little cell it was all lit up in the sunset. I
used up the best part of a roll of film on it and also the preceeding cells
which developed in the line when it was down around Tamborine.
Was just a weak cell, only one or two CG's during the entire life (but
around 1 per 5 secs av. high CCs), and it marked the boundary of a very weak
SE change moving up the coast. Plenty of rain though in the city I'm told.
Nothing at Mt. Crosby... just a really great view.
John.
>snip
Hello aus-wx,
Below are links to some pictures of a small storm cell over Brisbane.
Pictures are from the northern outskirts looking south east using a digital
camera. Images were taken around 18:30 local time.
http://www.powerup.com.au/~as029/storm/991123_1.jpg
http://www.powerup.com.au/~as029/storm/991123_2.jpg
http://www.powerup.com.au/~as029/storm/991123_3.jpg
http://www.powerup.com.au/~as029/storm/991123_4.jpg
I have boxed an area in image 4 round what I think is a Pileus. Opinions
please. (I know that it is hard to see. The zoom on the camera is not all
that good.)
Regards,
Anthony Spierings
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| Document: 991123.htm
Updated: 27 November 1999 |
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