From: "Phil Smith" <drdisk at hktrade.com>
To: <aussie-weather at world.std.com>
Subject: aus-wx: Unusual weather here
Date: Sun, 29 Oct 2000 16:31:30 +0800
Organization: Doctor Disk
X-Mailer: Microsoft Outlook Express 5.50.4133.2400
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

G'day all.
Here in HK we find ourselves caught between two massive systems.  Typhoon
Xangsane has barrelled across the Philippines and is now headed straight for
us from the South.  Meanwhile an intense High pressure system is barrelling
towards us from the North.  The powerful NorthEast Monsoon has just caused
the hoisting of the Strong Monsoon Signal (SMS), so it looks like the High
will win the battle.  The monsoon has dispersed every trace of cloud and
every trace of our usual air pollution as well and the sky is deep blue with
the sun streaming down. The gusty wind was nearly blowing us off the bridge
as we walked home from church.
My guess is that as these two systems approach each other the pressure
gradient will become steeper and steeper so the Observatory may yet have to
replace the SMS with a Typhoon Signal as the wind gets stronger and
stronger - probably above gale-force.
My guess is that the cold, dry monsoon wind will penetrate the typhoon and
completely annihilate it before it actually reaches HK (this happened a
couple of times in the past decade around this time of year).  The satellite
animation at http://www.weather.org.hk/gms5.html shows the northern
rainbands approaching us and then vanishing as they meet the cold clear air
of the monsoon.
From tomorrow morning when I can get access to change my own web-page again,
I shall be keeping the details up-to-date at
http://www.drdisk.com.hk/cyclones.htm.
Whatever happens, it will be an interesting couple of days for us here.

Phil
<><
Phil Smith

Director
Doctor Disk Limited
Unit B, 4th Floor, Imperial Heights
Belair Gardens, Shatin, NT
HONG KONG S.A.R.
People's Republic of China
Phone +852 2646 4672
Fax +852 2637 4006
E-mail: phil at drdisk.com.hk
Home e-mail: drdisk at hktrade.com
Web: http://www.drdisk.com.hk
Typhoon Information: http://www.drdisk.com.hk/cyclones.htm




 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 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: Mon, 30 Oct 2000 04:24:10 +1000
To: aussie-weather at world.std.com
From: Carl Smith <carls at ace-net.com.au>
Subject: Re: aus-wx: 2 more possible tornadoes
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

Hi Ben and All.

>Hi Everyone,
>
>Some interesting reports starting to filter in now - those who watched
>channel 7 or 10 tonight would have seem some very nasty damage in the
>northern QLD town of Silver Valley, which is just east of Charters Towers.
>The damage included a house very badly damaged/pretty much buggered, an area
>of forest with it's trees stripped of leaves, and a small plane blown 30m
>from its original location.  A resident said "he walked out the door and saw
>it" when the reporter was talking about the Tornado.  Winds were estimated
>at 200km/h.

Saw it on Channel 7.

The only Nth. Qld. Silver Valley I know of is a loose communty of houses
scattered along a remote road in the middle of nowhere about 25 miles or so
W of Ravenshoe, a few miles to the NNE of Innot Hot Springs, and SSW of
Herberton, and is nowhere near Charters Towers - I used to live near the
Millstream between Ravenshoe and Innot Hot Springs.

>
>I have uploaded a preminary report on this event, which has the same
>information as i have written above, but also has a selection of data for
>those interested - including a very interesting radar loop showing the
>storm, which splits, and the left mover is the storm that moved over Silver
>Vallery.
>
>http://www.bsch.simplenet.com/products/reports/2000/october/28/index.htm
>
>I have labled it a possible tornado as earlier in the evening there was some
>doubt - but hopefully the Townsville BOM will inspect the damage (you would
>think they will, it really did look quite nasty) and confirm whether it was
>a tornado or not.
>
>Apparently there was also a news report on the ABC tonight showing damage in
>the town of Ravenshoe, in the Atherton Tablelands (i think).  The damage
>included some sheds 'blown away' and trees stripped of leaves AND branches.
>Not sure what day this occured - i presume Saturday.  They also labled it a
>'mini tornado'
<snip>

Probably the same storm that hit Siver Valley, and probably less than an
hour later - glad I am not still living under a tarp strung up between the
eucalypts on the block near the Millstream....

Ravenshoe is about 25 miles or so S of Atherton, and is high on the W
slopes of the W range of the Atherton Tablelands.

It is in the transition zone between the very wet tablelands climate and
the much drier inland climate - it more frequently rains on the E side of
the town and is far drier on the W side - the transition over 3 or 4 km is
quite startling.

It also boasts the highest pub in Queensland, which has nothing to do with
the amount of weed smoked there......:-)

Regards,
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: "bussie" <bussie at netc.net.au>
To: "weather list" <aussie-weather at world.std.com>
Subject: aus-wx: Sorry forgot the address
Date: Mon, 30 Oct 2000 06:48:25 +1100
X-Mailer: Microsoft Outlook Express 5.50.4133.2400
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

Sorry about that I forgot to put the address in. Should of been:
Just found this one. Has free SMS messaging to mobiles in most parts of the
world and also has a link to weather sites which includes ASWA.
http://www.totalise.com.au
Bussie (NE Victoria)

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
X-Sender: mbath at pop.ozemail.com.au
X-Mailer: QUALCOMM Windows Eudora Version 5.0
Date: Mon, 30 Oct 2000 14:48:51 +1100
To: aussie-weather at world.std.com
From: Michael Bath <mbath at ozemail.com.au>
Subject: Re: aus-wx: REPORTS: North Coast NSW storms
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

<x-flowed>
Hi all,

The remainder of my reports have been completed and updated with radar and 
satpics.

The two shelf cloud events - 25th October:
http://australiasevereweather.com/storm_news/2000/docs/0010-04.htm

And the next day's severe storm (also with a shelf cloud) and lightning 
show - 26th October:
http://australiasevereweather.com/storm_news/2000/docs/0010-05.htm

Let me know if you spot any typos or care to make any comments.

regards, Michael


At 22:33 28/10/2000 +1000, you wrote:
>Hi all,
>
>OK then - I have put some stuff online already, but still heaps to be done 
>- access them from here:
>http://australiasevereweather.com/storm_news/
>
>Specifically the storm on 16th October which Anthony Cornelius bagged on 
>the Gold Coast:
>http://australiasevereweather.com/storm_news/2000/docs/0010-03.htm
>
>More importantly, the FIRST shelf cloud on the day for me on the 25th 
>October - this is really spectacular and I welcome comments please. I 
>still have to add the photos and report of the SECOND shelf cloud and 
>lightning that came over my house 2 hours after the one I have here 
>already here for your enjoyment:
>http://australiasevereweather.com/storm_news/2000/docs/0010-04.htm
>
>The severe storm which hit my place at McLeans Ridges and all the really 
>good lightning pics will be available "real soon now" <G>



  =============================================================
  Michael Bath      mailto:mbath at ozemail.com.au
  McLeans Ridges    http://australiasevereweather.com/
  NE NSW Australia  http://www.lightningphotography.com/
  ASWA Secretary    http://www.severeweather.asn.au/
  =============================================================

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
</x-flowed>
From: Blair Trewin <blair at earthsci.unimelb.edu.au>
Subject: Re: aus-wx: IT'S REALLY RAINNING!
To: aussie-weather at world.std.com
Date: Mon, 30 Oct 2000 15:35:36 +1100 (EST)
X-Mailer: ELM [version 2.5 PL2]
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

Heavy rain in Queensland in the 24 hours to 9 this morning. Most of
the area in a triangle bounded by Ayr, Bundaberg and Bollon has got
more than 50mm, with numerous stations scattered through the area
topping 100 (e.g. 180 at Byfield (between Mackay and Rockhampton),
155 at Dysart, 187 at Monduran (west of Bundaberg), 123 at Gin Gin, 
113 at Roma).

The rain seems to be continuing today, but further south and east
(45mm at Nambour in the five hours 0900-1400 today).

It has certainly been a wet month over Australia as a whole. Apart
from a few pockets (some of which may be due to non-reporting of
data), nearly all of Australia east of a line from Broome to 
Esperance has recorded above-average rainfall for October, except 
for the coastal plain east of the Great Dividing Range between
about Gympie and Sale. (Of course, this coastal plain includes a     
pretty large percentage of Australia's population).

Most of the models suggest a pretty wet week ahead, too.

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: "Met Support 3" <twc at theweather.com.au>
To: <aussie-weather at world.std.com>
Subject: aus-wx: SE Qld Severe Weather Warning
Date: Mon, 30 Oct 2000 16:46:55 +1100
Organization: The Weather Company
X-Mailer: Microsoft Outlook Express 5.00.2919.6700
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

<x-html>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=iso-8859-1" http-equiv=Content-Type>
<META content="MSHTML 5.00.2920.0" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT face=Arial size=2>TOP PRIORITY<BR>SEVERE WEATHER WARNING for Heavy 
Rainfall and Localised Flooding, Damaging Wind<BR>Gusts and Dangerous Sea 
Conditions.<BR>Issued by the Bureau of Meteorology, Brisbane<BR>At 1530 EST on 
Monday the 30th of October 2000<BR><BR>For the coast and nearby ranges between 
Gladstone and Coolangatta, and for<BR>island communities south from Heron 
Island.<BR><BR>[1] Heavy rain this evening and overnight is expected to cause 
rapid stream<BR>rises and localised flooding. Motorists are advised to avoid 
flooded roads.<BR><BR>[2] Wind gusts in excess of 90km/h may cause tree and 
power line damage. <BR>People are advised to stay indoors if possible and take 
precautions if out in<BR>the open or driving in the wet windy conditions. 
<BR><BR>[3] Waves are expected to increase during Tuesday to average 5 metres 
along the<BR>exposed coast south of Sandy Cape. Some beach erosion may result. 
<BR>People are advised to stay out of the water until the seas 
moderate.<BR><BR><BR>SYNOPTIC SITUATION<BR>On the 3pm weather chart... A 1006 
hPa low was centred just north of Yeppoon,<BR>and expected to intensify rapidly 
over the next 24 hours and move to the<BR>southeast. A ridge of high pressure 
extended across the north Tasman Sea. <BR><BR><BR>For further advice, contact 
your local police or SES.<BR><BR>The next Severe Weather Warning will be issued 
at 1830 EST.</FONT></DIV></BODY></HTML>

</x-html>
X-Authentication-Warning: new-smtp2.ihug.com.au: Host p40-max20.syd.ihug.com.au [203.173.153.168] claimed to be ihug.com.au
Date: Mon, 30 Oct 2000 16:50:05 +1100
From: Andrew Puddifer <typhoon at ihug.com.au>
X-Mailer: Mozilla 4.04 [en] (Win95; I)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: REPORTS: North Coast NSW storms
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

  Hi Michael,

 Which storms did you see on the North coast? I was in a place
called Brooms Head on the 25th, and got a great series of photos
of a shelf cloud(not developed yet though!). This storm also had
a very small lowering, with some rotation, which I also got a
photo of.
 I was also in Coffs Harbour on the 26th, and we had a very big
storm come through about dark. I was inside, and couldn't travel
to chase it due to a very nasty driveway on the property I was
on! But I did get to witness my closest lightning strike
ever...about 100m away on a ridgetop! Pretty scary when you are
in a steel frame house! We had a recorded 95mm in an hour out of
that storm, doubtless it would have been heavier than that in
parts. I watched that storm over the ocean for at least a couple
of hours...really an impressive storm.

 Regards, Andrew.

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
From: "Paul Mossman" <paulmoss at tpgi.com.au>
To: aussie-weather at world.std.com
Date: Mon, 30 Oct 2000 17:48:11 +0930
Subject: aus-wx: NT Supercell 
X-mailer: Pegasus Mail for Win32 (v3.12a)
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

Hi all - on the 26.10. a small town 50km/h South of Alice Springs 
was on the end of a pretty savage supercell (confirmed by Darwin 
BOM).

It moved NE against the steering flow, cause structural damage 
and had associated heavy rain and large hail.

Awaiting further info - if anyone has radar and/or stapics they would 
be appreciated.

Here today - storms storms storms - very humid day with a decent 
CAPE & LI value saw multiple pulse storms thoughout the Darwin 
area. 

Paul in Darwin
 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
X-Authentication-Warning: new-smtp2.ihug.com.au: Host p47-max41.syd.ihug.com.au [203.173.147.175] claimed to be storm.ihug.com.au
X-Sender: jdeguara at pop.ihug.com.au
X-Mailer: QUALCOMM Windows Eudora Version 5.0
Date: Mon, 30 Oct 2000 19:28:03 +1000
To: aussie-weather at world.std.com
From: Jimmy Deguara <jdeguara at ihug.com.au>
Subject: Re: aus-wx: Sorry forgot the address
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

<x-flowed>
Hi Bussie and all,

Laurier Williams will be quite pleased or disappointed that the link of the 
Australian Meteorological and Oceanographic Society has his URL as the 
link!!!  :):)

I don't think AMOS would be happy.

Jimmy Deguara

At 06:48 AM 30/10/00 +1100, you wrote:
>Sorry about that I forgot to put the address in. Should of been:
>Just found this one. Has free SMS messaging to mobiles in most parts of the
>world and also has a link to weather sites which includes ASWA.
>http://www.totalise.com.au
>Bussie (NE Victoria)
>
>  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>  To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
>  with "unsubscribe aussie-weather your_email_address" in the body of your
>  message.
>  -----------------------jacob at iinet.net.au------------------------------

-----------------------------------------
Jimmy Deguara
Storm Chaser and Mathematics Teacher

from
Schofields, Sydney
NSW Australia

e-mail:jdeguara at ihug.com.au

Web Page with Michael Bath

Australian Severe Weather Home Page
http://www.australiasevereweather.com

President of the Australian Severe Weather Association
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------------------------------
</x-flowed>
X-Originating-IP: [139.134.23.67]
From: "Shaun Whelan" <wheelsthepusser at hotmail.com>
To: aussie-weather at world.std.com
Subject: aus-wx: 2 Questions
Date: Mon, 30 Oct 2000 20:12:46 EST
X-OriginalArrivalTime: 30 Oct 2000 09:12:46.0764 (UTC) FILETIME=[91860EC0:01C04251]
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

<x-flowed>
     1/ Just wondering if anybody had any thoughts/comments of the photo I 
posted the other day?
     2/ Did anybody get the photo I posted the other day?

                                       Shaun    Nowra

                                           Overcast & cool
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

Share information about yourself, create your own public profile at 
http://profiles.msn.com.

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
</x-flowed>
From: "Duncan & Mandy" <duncman at asiaonline.net.au>
To: <aussie-weather-digest at world.std.com>
Subject: aus-wx: Alice weekend Storms
Date: Mon, 30 Oct 2000 18:53:07 +1030
X-Mailer: Microsoft Outlook Express 5.00.2314.1300
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

G'day Peoples,
21.5mm from the latest wet stuff and excellent storms to hit Alice Springs
West on the Weekend. So far Alice Springs is well over its average for
October. Looks as though it'll stay dry and warm for the foreseable future.
No rivers are running, although Arltunga, some old mining ruins about 50kms
East of here, received over 80 mm. I would think that would've been enough
to close some roads in the area.
Cheers,
duncan

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 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: [139.134.23.67]
From: "Shaun Whelan" <wheelsthepusser at hotmail.com>
To: aussie-weather at world.std.com
Date: Mon, 30 Oct 2000 20:23:59 EST
X-OriginalArrivalTime: 30 Oct 2000 09:23:59.0821 (UTC) FILETIME=[22B267D0:01C04253]
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

<x-flowed>
     Could anyone tell me what sort of conditions could cause this type of 
image?

          http://www.bom.gov.au/cgi-bin/radar.cgi?IDR331

     Or is it just a radar anomaly?
                                    Shaun    Nowra
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.

Share information about yourself, create your own public profile at 
http://profiles.msn.com.

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
</x-flowed>
From: "Andrew Godsman" <g-man1 at bigpond.com>
To: <aussie-weather at world.std.com>
Subject: Re: aus-wx: 2 Questions
Date: Mon, 30 Oct 2000 20:10:05 +1100
X-Mailer: Microsoft Outlook Express 5.00.2919.6600
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

Hi Shaun,

My thoughts, good little piccie of what I think of as a classic south coast
off-shore storm. They often ramp right up after getting over the warmer
current off-shore. I have often sat back and looked at these storms, but not
bothered to photograph due to the distance and relative chances of catching
lightning.

Hopefully this Qld coastal low doesn't just drift off to the SE after it is
finished up there, but instead follows the coastline south. A question of my
own, will the high pressure systems currently south of the bight low, and
ridging east of the Qld low work to keep these systems moving into a
position to offer interesting weather for us around Wollongong/Sydney??

Andrew Godsman
----- Original Message -----
From: "Shaun Whelan" <wheelsthepusser at hotmail.com>
To: <aussie-weather at world.std.com>
Sent: Tuesday, October 31, 2000 12:12 PM
Subject: aus-wx: 2 Questions


>      1/ Just wondering if anybody had any thoughts/comments of the photo I
> posted the other day?
>      2/ Did anybody get the photo I posted the other day?
>
>                                        Shaun    Nowra
>
>                                            Overcast & cool
> _________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
>
> Share information about yourself, create your own public profile at
> http://profiles.msn.com.
>
>  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>  To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
>  with "unsubscribe aussie-weather your_email_address" in the body of your
>  message.
>  -----------------------jacob at iinet.net.au------------------------------
>

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
From: "bussie" <bussie at netc.net.au>
To: "weather list" <aussie-weather at world.std.com>
Subject: aus-wx: Currently
Date: Mon, 30 Oct 2000 20:34:40 +1100
X-Mailer: Microsoft Outlook Express 5.50.4133.2400
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

After a beautiful day today of 27C there are now some heavy looking clouds
starting to come across the border from the north. Maybe we may get wet
before the forecast of tomorrow evening perhaps? Just guessing as usual. :-)
Bussie (NE Victoria)

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
Date: Mon, 30 Oct 2000 20:45:24 +1100
From: Jane ONeill <cadence at stormchasers.au.com>
X-Mailer: Mozilla 4.5 [en] (Win95; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: 2 Questions
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

Very quickly....
1/ stunning!!!!!
2/ yes

Footnote: - I wish I could take pics like that but my lightning photography is
absolutely non - existent!!!!  Now all you need to do is to create a webpage &
put the rest up that you obviously have locked away down there.

Watching the cloud drift south...south...south - 25C here today & I saw a
couple of congesting Cu wandering about along the ranges and a weak congesting
Cu to the SE this evening on the first seas breeze front I've been able to ID
this season.....

Jane

Shaun Whelan wrote:

>      1/ Just wondering if anybody had any thoughts/comments of the photo I
> posted the other day?
>      2/ Did anybody get the photo I posted the other day?
>
>                                        Shaun    Nowra
>

--------------------------------
Jane ONeill - Melbourne
cadence at stormchasers.au.com

Melbourne Storm Chasers
http://www.stormchasers.au.com

ASWA - Victoria
http://www.severeweather.asn.au
--------------------------------


 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
X-Originating-IP: [139.134.23.67]
From: "Shaun Whelan" <wheelsthepusser at hotmail.com>
To: aussie-weather at world.std.com
Subject: Re: aus-wx: 2 Questions
Date: Mon, 30 Oct 2000 21:26:10 EST
X-OriginalArrivalTime: 30 Oct 2000 10:26:10.0411 (UTC) FILETIME=[D24D43B0:01C0425B]
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

<x-flowed>
     Thanks Andrew, I was just curious because I didn't recieve it. The 
storm is probably over the Lake Conjola area but was moving towards the 
ocean. I am more curious about the protruberance in the middle as it was 
more than 40k away from me and it was even more impressive to look at. The 
wife has given me some more info on the day in question as she didn't 
partake in any of the post fishing refreshments but we had green clouds and 
hail with some very strong but brief wind and rain that hurt when it hit 
you. I'm pretty sure I can remember it but we had 2 or 3 storms around that 
time and they were all pretty good.
     So here's hoping for some blinders of storms down here soon (away from 
populated areas of course) in the Illawarra/Sth Coast area and hope to catch 
up soon on a chase.
                                 Regards
                                        Shaun    Nowra

                                         Dark and somewhat chilly


>From: "Andrew Godsman" <g-man1 at bigpond.com>
>Reply-To: aussie-weather at world.std.com
>To: <aussie-weather at world.std.com>
>Subject: Re: aus-wx: 2 Questions
>Date: Mon, 30 Oct 2000 20:10:05 +1100
>
>Hi Shaun,
>
>My thoughts, good little piccie of what I think of as a classic south coast
>off-shore storm. They often ramp right up after getting over the warmer
>current off-shore. I have often sat back and looked at these storms, but 
>not
>bothered to photograph due to the distance and relative chances of catching
>lightning.
>
>Hopefully this Qld coastal low doesn't just drift off to the SE after it is
>finished up there, but instead follows the coastline south. A question of 
>my
>own, will the high pressure systems currently south of the bight low, and
>ridging east of the Qld low work to keep these systems moving into a
>position to offer interesting weather for us around Wollongong/Sydney??
>
>Andrew Godsman
>----- Original Message -----
>From: "Shaun Whelan" <wheelsthepusser at hotmail.com>
>To: <aussie-weather at world.std.com>
>Sent: Tuesday, October 31, 2000 12:12 PM
>Subject: aus-wx: 2 Questions
>
>
> >      1/ Just wondering if anybody had any thoughts/comments of the photo 
>I
> > posted the other day?
> >      2/ Did anybody get the photo I posted the other day?
> >
> >                                        Shaun    Nowra
> >
> >                                            Overcast & cool
> > 
>_________________________________________________________________________
> > Get Your Private, Free E-mail from MSN Hotmail at 
>http://www.hotmail.com.
> >
> > Share information about yourself, create your own public profile at
> > http://profiles.msn.com.
> >
> >  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> >  To unsubscribe from aussie-weather send e-mail 
>to:majordomo at world.std.com
> >  with "unsubscribe aussie-weather your_email_address" in the body of 
>your
> >  message.
> >  -----------------------jacob at iinet.net.au------------------------------
> >
>
>  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>  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.

Share information about yourself, create your own public profile at 
http://profiles.msn.com.

 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
 To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
 with "unsubscribe aussie-weather your_email_address" in the body of your
 message.
 -----------------------jacob at iinet.net.au------------------------------
</x-flowed>
X-Authentication-Warning: new-smtp1.ihug.com.au: Host p84-max41.syd.ihug.com.au [203.173.145.150] claimed to be storm.ihug.com.au
X-Sender: jdeguara at pop.ihug.com.au
X-Mailer: QUALCOMM Windows Eudora Version 5.0
Date: Mon, 30 Oct 2000 22:09:19 +1000
To: Aussie-weather at world.std.com
From: Jimmy Deguara <jdeguara at ihug.com.au>
Subject: aus-wx: Events coming up for ASWA and AMOS
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

<x-flowed>
ASWA meeting on Saturday 11th November 2000 - details already given 
recently - a reminder later.

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

I would suggest people take note of the following meeting as it involves 
the period last year matching the Olympic period when there were severe 
storms. This includes the 22nd September 1999 event. This is quite an 
interesting topic.

NOTICE OF NOVEMBER SCIENTIFIC MEETING


AMOS Sydney will hold an additional scientific meeting on Wednesday 8 
November, 2000.

Venue:  Bureau of Meteorology
         Corner of 300 Elizabeth, and Foveaux Streets, Sydney.
Time:   6:00 pm.

The program will include the Annual General Meeting, and election of the 
Centre Committee for 2001 (nominations now called for). This will be 
followed by a presentation by
Dr. Tom Keenan who will speak on the First Forecast Demonstration Project 
of the World Weather Research Programme.
The Committee will dine afterwards, and members are invited to join us.
AMOS (Special) November Meeting  8 November 2000; Bureau of Meteorology
*** Note: AGM at 6:00pm, followed by talk ***

First Forecast Demonstration Project of the
World Weather Research Programme
Dr. Tom Keenan.
Leader, Mesoscale Meteorology Research Group,
Bureau of Meteorology Research Centre

In conjunction with the Bureau of Meteorology (BoM), Australia, the World 
Weather Research Programme is conducting its first Forecast Demonstration 
Project (FDP) over the 3 month period August-November 2000 in association 
with Sydney 2000 Olympic Games.  The emphasis is on nowcasting and 
state-of-the-art and complementary WWRP nowcast systems have been 
integrated within the infrastructure and forecast process of the BoM Sydney 
forecast office.  The aim is to enhance the provision of real time nowcast 
services provided by the BoM.  Nowcast systems include, Generating Advanced 
Nowcasts for Deployment in Operational Land-Surface Flood Forecasts from 
the United Kingdom Meteorological Office (UKMO) and University of Salford, 
NIMROD developed by the UKMO, the National Center for Atmospheric Research 
Autonowcaster, the Warning Decision and Support System developed by the 
National Severe Storms Laboratory, the Canadian Radar Decision Support 
System developed by Atmospheric Environment Science in Canada, a 
polarimetric radar microphysical classification scheme developed by Bureau 
of Meteorology Research Centre and SpecPROG developed by Hydrology Branch 
of the BoM.
The BoM is providing enhanced mesoscale observations from Doppler and 
polarimetric radars, wind profilers and automatic weather stations.  These 
data are being linked with other standard sources and high-resolution 
numerical prediction information to feed the WWRP nowcast systems.  A 
web-based guidance system with an animation facility is providing 
information on severe weather occurrence, rainfall and wind changes to 
forecasters.  Enhanced nowcast products are being delivered to external 
clients using web-based techniques.  Direct interaction between forecasters 
and WWRP system experts is occurring in an operational mode.  Integral 
parts of the FDP involve the verification and impact studies under WWRP 
guidance to assess the value and impact of the improved services during the 
FDP.  A WMO sponsored Training Workshop is be held from 30 October to 10 
November 2000 in conjunction with the FDP to enable other WMO members to 
learn about the FDP activities.





-----------------------------------------
Jimmy Deguara
Storm Chaser and Mathematics Teacher

from
Schofields, Sydney
NSW Australia

e-mail:jdeguara at ihug.com.au

Web Page with Michael Bath

Australian Severe Weather Home Page
http://www.australiasevereweather.com

President of the Australian Severe Weather Association
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------------------------------
</x-flowed>
From: "Anthony Spierings" <as029 at bigpond.net.au>
To: <aussie-weather at world.std.com>
Subject: aus-wx: Objects that attract lightning
Date: Mon, 30 Oct 2000 21:37:15 +1000
X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0
Importance: Normal
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com

Original question by bussie,

>Just a theory I have, perhaps the strike was attracted to the transformer
on the pole??

Finally, return to work today after some holidays.  I had an interesting
discussion with one of the engineers who did his dissertation on lightning
protection.  He pointed me in the direction of Australian Standard 1768 –
Lightning Protection.  The standard is a wealth of knowledge.  While there
is some heavy mathematics in AS-1768, it is quite a readable document.  A
copy of the standard should be available at most University and TAFE
libraries.

Here are some selected quotes from the standard.

Appendix A
Section A2.2 The lightning attachment process

“The first stroke of a ground flash is normally proceeded by a
downward-progressing low-current leader discharge which commences in the
negatively charged region and progress towards the earth, depositing
negative charge in the air surrounding the channel.  When the lower end of
the leader is roughly 100m from the earth, electrical discharges (streamers)
are likely to be initiated at protruding earth objects, and to propagate
towards the leader channel.  Several streamers may start, but usually only
one is successful in reaching the downcoming leader.  The high current phase
(return stroke) commences at the moment the upward moving streamer meets the
downcoming leader.  The position in space of the lower portion of the
lightning channel is therefore determined by the path of the successful
streamer, i.e. the one which succeeded in reaching the downcoming leader.
The primary task in protecting a structure is therefore to ensure high
probability that the successful streamer originates from the lightning
protection conductors, and not from a part of the structure that would be
adversely affected by the lightning current that flows subsequently.

As the path of the successful streamer may have a large horizontal
component, e.g. may tens of metres, as well as a vertical component, an
elevated earth conductor will provide protection for objects spread out
below it.” End quote.


AS 1768, Section A8 CONNECTION VOLUME DESIGN contains formulas that can be
used to calculate the attractive radius of a structure.  This calculation is
valid for a tall slender object (ie small radio transmitter, power pole)
standing above flat ground.  The equation given is in section A5.3.2 THE
STRIKING DISTANCE:

d = 10 X i^0.65

Where

^ is to the power of
d = the strike distance in metres,
i  = the peak current of the return stroke, in kiloamperes (kA)

From what I can gather, there is a  95% confidence that peak current stroke
will be between 5 kA to 240 kA.    To cut a long story short, 93% of all
ground flashes exceed 10 kA.  This gives a corresponding attractive radius
of 45 metres.  This is where the concept of the rolling sphere comes in when
designing lightning protection for objects (substations, buildings,
refineries).  The designer will place the lightning masts in such a position
that an imaginary sphere with a radius of 45 metres cannot touch the
equipment that requires protection.  The engineer at work uses a typical
calculation (with corrections for earth resistance and the fact that it is a
straight line) that a power line has an attractive radius of about 50
metres.  While this radius is like an upsidedown "U" over the powerline
there is the equal-probability locus that is somewhat like a flattened "U"
sitting on top of the powerline"



Section 5.3 MODES OF ENTRY OF LIGHTNING IMPULSES

“There are three principal modes of entry of lightning impulses into
buildings, as described below, and these may occur separately or in
combination:

(a) Directly by the inception of lightning on exterior metalwork. ... this
mode of entry is characterised by a series path for the full impulse energy
and is capable of conveying the full destructive force of the lightning
discharge ...

(b) Indirectly by the inception of lightning on other structure or services
... (this part gives descriptive details of a shunt path and the earth
potential rise [EPR] due to V=IR.) ... In addition, in urban areas the
number of services with an earth connection is considerable, perhaps 100 per
kilometre. Consequently the EPR lightning impulse is rapidly reduced,
perhaps to insignificant levels in about 60 metres or so.  On the other
hand, sparsely settled areas with distribution systems other than the MEN
(multiple earth neutral) type can give rise to high EPR values that may not
be reduced to safe levels for some hundreds of metres. ... It should be
noted that EPR conditions can arise singly or as a combination of
occurrences.  In addition to lightning interception the low voltage overhead
distribution, other lightning leaders may intercept trees, clothes lines,
sheds and other nearby structures, giving rise to quite complex overall EPR
condition.

(c) Inductively by electric and magnetic field coupling ... involves low
energy levels ... may disable or damage some communication equipment.”

AS 1768 Figure 2.1 is a copy of a map issued by the BoM titled “Average
Annual Thunder-Day Map” with the mean based on the 10 years 1954 – 1963
inclusive.  The hot spot is, of course, Darwin with over 80 thunder days on
average.  The eastern seaboard ranges from the 10-15 around Perth, Adelaide,
and Melbourne, 20’s around Sydney, 30’s around Brisbane.  There are numerous
hot spots with averages above these.  (Personally, I think that 10 years is
far too short a period to be collating averages on weather statistics then
pressing them into service.  Considering that this information is used to
calculate a level of risk that is acceptable.  One only has to consider the
dearth of storms in the Brisbane area over the last 10 years.)


Hope this of interest to some.

Regards,


Anthony Spierings
as029 at bigpond.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------------------------------