X-Originating-IP: [203.134.130.232]
From: "Ben Jerrems" <beanzvision at hotmail.com>
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Wall Cloud Rotation...
Date: Wed, 22 Nov 2000 00:05:45 +1100
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<x-flowed>
Hi Paul,
        Could you possibly tell me more about this "meso" that i keep 
hearing about?

         Ben-MSC





-------------------------------------


>From: "Paul Graham" <v_notch at hotmail.com>
>Reply-To: aussie-weather at world.std.com
>To: <aussie-weather at world.std.com>
>Subject: aus-wx: Wall Cloud Rotation...
>Date: Tue, 21 Nov 2000 22:03:03 +1100
>
>Hi everyone,
>Just thought I would add this remark about the orientation of southern
>hemisphere mesocyclones...
>I would expect that, when viewed from below, most southern hemisphere
>mesocyclones would be seen to be rotating anti-clockwise.   As
>anti-clockwise from below translates to a cyclonic rotation within the 
>storm
>when viewed from above and this would be favoured by a wind profile in 
>which
>there is "backing" as opposed to "veering".  However, that is not to say
>that it can't happen the other way...It depends on the wind profile, of
>course.  I guess the other thing is, when viewing a storm, it probably
>depends on where you are as to how you perceive the rotation - that is,
>anit-clockwise or clockwise...If you are right underneath, certainly it 
>will
>appear anti-clockwise, but if you are some distance away, you may perceive
>it as if you were looking down and then you will be thinking: 
>"clockwise"...
>
>Paul G.
>
><--SNIP-->
> >An anti-clockwise rotating wall cloud was observed as well as another
> > unconfirmed wall cloud. Storms were generally high precipitation...
><--SNIP-->
>
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From: "Ben Quinn" <benquinn at optushome.com.au>
To: <aussie-weather at world.std.com>
Subject: aus-wx: Brisbane Storms
Date: Tue, 21 Nov 2000 23:03:07 +1000
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Hi Everyone,

I take it the other Brisbane people didn't see anything too exciting
yesterday? I had a couple of storms here.  The first one was fairly tame,
but the second one had a SPECTACULAR shelf cloud on it, and the overall
structure was quite nice too

The first storm

http://bsch.simplenet.com/pictures/ben/20-11-200002.jpg
http://bsch.simplenet.com/pictures/ben/20-11-200003.jpg

I heard 2 rumbles of thunder from this

<begin whinge>

and this storm fried my $300 cable modem!!!!!!!!!!!!! as they say 'it only
takes one strike' ... but i mean GEEZE ...  (* at &#($*& at #$(*&

<end of whinge>

The second storm - fwor - for some reason i stayed in the one position while
photographing this storm.  I was talking to someone at my lookout and didn't
even think to drive towards the storm in order to photograph the shelf cloud
before dark.  Some structure shots :

http://bsch.simplenet.com/pictures/ben/20-11-200006.jpg
http://bsch.simplenet.com/pictures/ben/20-11-200009.jpg
http://bsch.simplenet.com/pictures/ben/20-11-200013.jpg  <--- digital zoom
shots of the updrafts

and but sweet mary jesus was the shelfy a deadset knockout.  About 15
minutes after the sun set it finally clicked in my head that i should drive
towards it to see the shelf cloud (DP's would have been around 23-24c at
that point).  10 mins later i pulled over a small hill to see a MASSIVE
shelf cloud stretching probably 20k's along the horizon - i nearly crashed
into a light pole! After pissing off a lot of other cars trying to get to
another lookout <g> I took close to a dozen pictures - but it was just too
dark, and only one of them came out - only just too

http://bsch.simplenet.com/pictures/ben/20-11-200014.jpg

It's awfully dark - and that is merely 1/4 of the shelf cloud, with the best
section just to the left outside the picture.  To say i was dissapointed
that i didn't position myslelf to photograph that before the sun set is an
understatement - sigh

There are 14 pictures, and i have only pasted the URL's for a few - if you
are interested in seeing the rest just change the numbers on the end




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From: "Ben Quinn" <benquinn at optushome.com.au>
To: <aussie-weather at world.std.com>
Subject: aus-wx: Darwin Storm Pics - Round 1 *ding ding*
Date: Tue, 21 Nov 2000 23:20:48 +1000
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Hi Everyone,

Jason arrived in Darwin yesterday, and has begun sending back pics

A great shot taken from the plane yesterday
http://bsch.simplenet.com/pictures/lem/20-11-200002.jpg
And probably hector (?) later on in the day
http://bsch.simplenet.com/pictures/lem/20-11-200001.jpg

And todays shots

http://bsch.simplenet.com/pictures/lem/21-11-200001.jpg
http://bsch.simplenet.com/pictures/lem/21-11-200002.jpg

I havn't had time to add these to the TD2kNT section yet, which can be
accessed from the storm chasing section now - direct URL is :

http://bsch.simplenet.com/lem/td2knt/

but i will add them and a few more tomorrow

This page is well worth bookmarking i think - forecasting tropical storms is
very much new to me, but my guess is storm activity will increase during
this week and over the weekend, so we could see a lot of veeeeery nice shots


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From: "Michael Thompson" <michaelt at ozemail.com.au>
To: <aussie-weather at world.std.com>
Subject: Re: aus-wx: Wall Cloud Rotation...
Date: Wed, 22 Nov 2000 11:31:40 +1100
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Hi Ben

This is short for mesocyclone - it refers to an rotating updraft in a
supercell thunderstorm. Strictly speaking the rotation must be evident from
the cloud base ( usually a wall cloud ) right up to the top of the storm.

http://www.nemas.net/edu/soundings/soundings.htm#Glossary

has another explanation as well as other tems you may hear from time to
time.

Michael

----- Original Message -----
From: "Ben Jerrems" <beanzvision at hotmail.com>
To: <aussie-weather at world.std.com>
Sent: Wednesday, 22 November 2000 0:05
Subject: Re: aus-wx: Wall Cloud Rotation...


> Hi Paul,
>         Could you possibly tell me more about this "meso" that i keep
> hearing about?
>
>          Ben-MSC
>
>
>
>
>
> -------------------------------------
>
>
> >From: "Paul Graham" <v_notch at hotmail.com>
> >Reply-To: aussie-weather at world.std.com
> >To: <aussie-weather at world.std.com>
> >Subject: aus-wx: Wall Cloud Rotation...
> >Date: Tue, 21 Nov 2000 22:03:03 +1100
> >
> >Hi everyone,
> >Just thought I would add this remark about the orientation of southern
> >hemisphere mesocyclones...
> >I would expect that, when viewed from below, most southern hemisphere
> >mesocyclones would be seen to be rotating anti-clockwise.   As
> >anti-clockwise from below translates to a cyclonic rotation within the
> >storm
> >when viewed from above and this would be favoured by a wind profile in
> >which
> >there is "backing" as opposed to "veering".  However, that is not to say
> >that it can't happen the other way...It depends on the wind profile, of
> >course.  I guess the other thing is, when viewing a storm, it probably
> >depends on where you are as to how you perceive the rotation - that is,
> >anit-clockwise or clockwise...If you are right underneath, certainly it
> >will
> >appear anti-clockwise, but if you are some distance away, you may
perceive
> >it as if you were looking down and then you will be thinking:
> >"clockwise"...
> >
> >Paul G.
> >
> ><--SNIP-->
> > >An anti-clockwise rotating wall cloud was observed as well as another
> > > unconfirmed wall cloud. Storms were generally high precipitation...
> ><--SNIP-->
> >
> >  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> >  To unsubscribe from aussie-weather send e-mail
to:majordomo at world.std.com
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your
> >  message.
> >  -----------------------jacob at iinet.net.au------------------------------
>
>
____________________________________________________________________________
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 -----------------------jacob at iinet.net.au------------------------------
Date: Tue, 21 Nov 2000 21:37:38 -0500
From: "Leslie R. Lemon" <lrlemon at compuserve.com>
Subject: Re: aus-wx: Wall Cloud Rotation...
To: "INTERNET:aussie-weather at world.std.com" <aussie-weather at world.std.com>
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Ben:

Some additional information please go to: 
<http://www.srh.noaa.gov/oun/severewx/glossary.html> and to:
<http://www.srh.noaa.gov/oun/skywarn/spotterguide.html>
and to:  <http://ww2010.atmos.uiuc.edu/(Gh)/home.rxml>
and to:  <http://www.nws.noaa.gov/er/rah/nwa/tcpage2.html>.

The mesocyclone is also defined in the northern hemisphere as :

*Mesocyclone - A storm-scale region of rotation, typically around 2-6 miles
in diameter and often found in the right rear flank of a supercell (or
often on the eastern, or front, flank of an HP storm). The circulation of a
mesocyclone covers an area much larger than the tornado that may develop
within it. 

Properly used, mesocyclone is a radar term; it is defined as a rotation
signature appearing on Doppler radar that meets specific criteria for
magnitude, vertical depth, and duration. Therefore, a mesocyclone should
not be considered a visually-observable phenomenon (although visual
evidence of rotation, such as curved inflow bands, may imply the presence
of a mesocyclone). 

Les

************************
Leslie R. Lemon
Radar, Severe Storms, & Research Meteorologist
Tel. 816-373-3533, 816-213-3237
E-Mail: lrlemon at compuserve.com


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From: "evelyn&wayne" <hoyle at austarnet.com.au>
To: "weather" <aussie-weather at world.std.com>
Subject: aus-wx: thanks-Ben Quinn
Date: Wed, 22 Nov 2000 16:32:49 -0800
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<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Hi Ben,</FONT></DIV>
<DIV><FONT face=Arial size=2>Just thought I'd let you know that my radar of 
Queensland appears to of been updated. that will probably explain why I haven't 
been able to get anything on it. But guess what, they seem to have forgotten to 
put Townsville on the radar. On an afternoon like today it would of come in 
handy. As you can see by the lightning tracker we have plenty of activity going 
on up here in Townsville.Liked the "user friendly format" for the district 
forcast, what would the chances be of getting a radar with Townsville on it. 
Anyway thanks for your help,</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=Arial size=2>Regards, </FONT></DIV>
<DIV><FONT face=Arial size=2>Evelyn</FONT></DIV></BODY></HTML>

</x-html>
X-Originating-IP: [198.142.93.183]
From: "Shaun Whelan" <wheelsthepusser at hotmail.com>
To: aussie-weather at world.std.com
Subject: Re: aus-wx: thanks-Ben Quinn
Date: Wed, 22 Nov 2000 21:02:27 +1100
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<x-flowed>
     Hey there E & W,how are things in the Sunshine (gag) State?

         WRT your Qx about Townsville not being on you Rx, exactly what Rx 
are you looking at? What sort of access do you have to BoM sites? The Wx Co. 
has single frames of Wx Rx from Townsville. I'm not quite sure of excactly 
what sort of coverage you are after. Any questions or queries please feel 
free. And there are plenty of people on the list that will bust a gut to 
help you out.

                               Shaun     Nowra
                                        (all the clouds are blue!!!)

       P.S. Original Mess. sent because (Subject) was a little ambiguous.
          W


>From: "evelyn&wayne" <hoyle at austarnet.com.au>
>Reply-To: aussie-weather at world.std.com
>To: "weather" <aussie-weather at world.std.com>
>Subject: aus-wx: thanks-Ben Quinn
>Date: Wed, 22 Nov 2000 16:32:49 -0800
>
>Hi Ben,
>Just thought I'd let you know that my radar of Queensland appears to of 
>been updated. that will probably explain why I haven't been able to get 
>anything on it. But guess what, they seem to have forgotten to put 
>Townsville on the radar. On an afternoon like today it would of come in 
>handy. As you can see by the lightning tracker we have plenty of activity 
>going on up here in Townsville.Liked the "user friendly format" for the 
>district forecast, what would the chances be of getting a radar with 
>Townsville on it. Anyway thanks for your help,
>
>Regards,
>Evelyn

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X-Originating-IP: [198.142.93.183]
From: "Shaun Whelan" <wheelsthepusser at hotmail.com>
To: aussie-weather at world.std.com
Subject: aus-wx: Questions
Date: Wed, 22 Nov 2000 21:30:31 +1100
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<x-flowed>
     Just a few quick questions
         1/ What, if any, do contrails have in relation to upper (30k+) 
water vapour levels?
         2/Is there a Radar that just reads actual cloud ?
         3/ What are the scalings of Tornadoes?, [(i.e IRT Beaufort scale 
type of measurements)? F0 through to F5]
         4/ Actual speed of lightning. I have several different speeds  in 
as many publications. A reference to something would be much appr.

                  From an inquisitive Birdie
                                            Shaun     Nowra
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From: "Michael Thompson" <michaelt at ozemail.com.au>
To: <aussie-weather at world.std.com>
Subject: aus-wx: Joining the TDU2K chase
Date: Wed, 22 Nov 2000 22:12:36 +1100
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I will be setting off this Saturday and will meet up with Clyve Herbert
somewhere that day. Naturally things are starting to dry up storm wise, but
I have my eyes on a system that may come through mid next week.

Clyve and I will try to catch the others somewhere on Sunday to Monday. It
could well be that the crew heads back SE on Monday.

Michael Thompson
http://thunder.simplenet.com


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Date: Wed, 22 Nov 2000 22:11:42 +1000
To: aussie-weather at world.std.com
From: Sel Kerans <skerans at mail.cth.com.au>
Subject: aus-wx: Ants as weather forecasters?
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Hello folks,

These pictures were taken weeks ago outside my office - ants building above
the ground. Perhaps they know something? The scary thing is they are still
building higher!!!!

http://www.schools.ash.org.au/paa/images/ants.jpg
http://www.schools.ash.org.au/paa/images/antsbuild.jpg

Cheers,

Sel
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