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Storm News
[Index][Aussie-Wx] |
Australian Weather Mailing List Archives: Wednesday, 19 January 2000 |
From Subject
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001 "Jason" [kevans at kisser.net.au] TC to develope in 12/24hrs (Ocean Gale warning)
002 "Leslie R. Lemon" [lrlemon at compuserve.com] Overshooting the EL"
003 Dion Williams [onamission at start.com.au] Re: and almost 9 years since...
004 Jimmy Deguara [jdeguara at ihug.com.au] heading up again
005 Matt Smith [disarm at braenet.com.au] NSW Chase
006 Boskell Andrew [andrew.boskell at dchs.tas.gov.a Thunderstorm Activity!
007 Michael Scollay [michael.scollay at telstra.com. Savage Monsoonal Storm
008 Blair Trewin [blair at met.Unimelb.EDU.AU] Warmest so far this summer
009 Mark Dwyer [mjd at wantree.com.au] Another TC to the North of WA
010 Miguel de Salas [mm_de at postoffice.utas.edu.au Savage Monsoonal Storm
011 Michael Scollay [michael.scollay at telstra.com. ASWA Minor Flood Warning Northern NSW
012 "Jane ONeill" [cadence at rubix.net.au] Welcome
013 "Ian Weller" [IYW at rbfb.tas.gov.au] Welcome
014 Lyle Pakula [LyleP at oakton.com.au] Savage Monsoonal Storm
015 "John Woodbridge" [jrw at pixelcom.net] ASWA Minor Flood Warning Northern NSW
016 "John Woodbridge" [jrw at pixelcom.net] Savage Monsoonal Storm
017 Miguel de Salas [mm_de at postoffice.utas.edu.au Savage Monsoonal Storm
018 Paul.Mossman at DWNNICH.OCA.nt.gov.au Models
019 Lyle Pakula [LyleP at oakton.com.au] Savage Monsoonal Storm
020 Lyle Pakula [LyleP at oakton.com.au] fluro's and lightning
021 "weatherhead" [weatherhead at ozemail.com.au] Hot in Sydney's west!!
022 "John Graham" [gorzzz at optusnet.com.au] Savage Monsoonal Storm
023 Phil Bagust [paisley at cobweb.com.au] Savage Monsoonal Storm
024 "Halden Boyd" [haldenboyd at hotmail.com] Pulling out of aswx
025 Lyle Pakula [LyleP at oakton.com.au] fluro's
026 Blair Trewin [blair at met.Unimelb.EDU.AU] ASWA Minor Flood Warning Northern NSW
027 Patrick_Tobin at ama.com.au Trough brings great cu to Canberra
028 Blair Trewin [blair at met.Unimelb.EDU.AU] Hot in Sydney's west!!
029 Blair Trewin [blair at met.Unimelb.EDU.AU] One of my pet hates...
030 "John Graham" [gorzzz at optusnet.com.au] ASWA Minor Flood Warning Northern NSW
031 "John Graham" [gorzzz at optusnet.com.au] NSW STA
032 Michael Scollay [michael.scollay at telstra.com. Pulling out of aswx
033 Keith Barnett [weather at ozemail.com.au] Hot in Sydney's west!!
034 Michael Scollay [michael.scollay at telstra.com. Trough brings great cu to Canberra
035 Michael Scollay [michael.scollay at telstra.com. Storm lid lifting around Sydney...
036 Robert Goler [robert at neumann.maths.monash.edu One of my pet hates...
037 "John Woodbridge" [jrw at pixelcom.net] fluro's and lightning
038 "John Woodbridge" [jrw at pixelcom.net] One of my pet hates...
039 "Jane ONeill" [cadence at rubix.net.au] ASWA Minor Flood Warning Northern NSW
040 Michael Scollay [michael.scollay at telstra.com. Storm lid lifting around Sydney...
041 Paul.Mossman at DWNNICH.OCA.nt.gov.au Hot in Sydney's west!!
042 Keith Barnett [weather at ozemail.com.au] Storm warning
043 Michael Scollay [michael.scollay at telstra.com. Storm lid lifting around Sydney...
044 "Willis, Andrew" [adwillis at bechtel.com] Starting to Fire at Newcastle
045 "Willis, Andrew" [adwillis at bechtel.com] And getting better...
046 Michael Scollay [michael.scollay at telstra.com. Storm lid lifting around Sydney...
047 "Michael Thompson" [michaelt at ozemail.com.au] Thunderstorm Activity!
048 "Michael Thompson" [michaelt at ozemail.com.au] Trough brings great cu to Canberra
049 "Michael Thompson" [michaelt at ozemail.com.au] Savage Monsoonal Storm
050 Anthony Cornelius [cyclone at flatrate.net.au] Hail Reported By our Hunter Chasers!
051 "Max King" [mnk at Dingoblue.net.au] Hail Reported By our Hunter Chasers!
052 Ira Fehlberg [jra at upnaway.com] ASWA Minor Flood Warning Northern NSW
053 "Matthew Piper" [mjpiper at ozemail.com.au] Summer at Last
054 Susan Puddifer [susanpud at healey.com.au] Halden Boyd
055 Andrew Puddifer [andypudd at backmeup.net.au] Pulling out of aswx
056 Don White [donwhite at ozemail.com.au] One of my pet hates...
057 "Jane ONeill" [cadence at rubix.net.au] Aussie weather list
058 "Mark Hardy" [mhardy at magna.com.au] One of my pet hates...
059 Andrew Puddifer [andypudd at backmeup.net.au] One of my pet hates...
--------------------------------------------------------------------------------------
001
From: "Jason" [kevans at kisser.net.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: TC to develope in 12/24hrs (Ocean Gale warning)
Date: Tue, 18 Jan 2000 22:51:36 +0800
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BUREAU OF METEOROLOGY
Northern Territory
Region
Darwin Regional Forecasting
Centre
40:0:1:24:10S128E999:11:00
PANPAN
HIGH SEAS WEATHER
WARNING
HIGH SEAS WEATHER WARNING FOR METAREA 10/11
Issued by the
AUSTRALIAN BUREAU OF METEOROLOGY, DARWIN
at 1330 UTC 18 JANUARY
2000
GALE WARNING FOR NORTHERN AREA
SITUATION
At 1200 UTC Tropical Low 1000 hPa
centred within 90 nautical miles of 11 S 127.5
E moving west at 05 knots. The
low is expected to develop into a tropical
cyclone in the next 12-24
hours.
AREA AFFECTED
Within 60 nautical miles of the centre, and
within 100 nautical
miles of the centre in the northeast
semicircle.
FORECAST
Winds 25/35 knots within 100 nautical
miles from the centre in the northeast
semicircle. Clockwise winds 20/30
knots expected to increase to 30/40 knots
within 12-24 hours elsewhere within
60 nautical miles of the centre. Rough to
very rough seas and rising
swell.
0000 UTC 19 January: 11 S 126 E 1000 hPa. Winds to 30 knots near
centre.
1200 UTC 19 January: 11.5 S 123 E 995 hPa. Winds to 40 knots near
centre.
REMARKS
Ships in the general area please transmit 3-hourly
weather reports.
DARWIN Tropical Cyclone Warning Centre
Weather might get interesting over the weekend here
in the North West with the models forecasting a West to South West track
:)
Jason
Karratha W.A
002
Date: Tue, 18 Jan 2000 15:12:00 -0500
From: "Leslie R. Lemon" [lrlemon at compuserve.com]
Subject: Parcel Potential: Was "Re: aus-wx: Overshooting the EL"
To: "INTERNET:aussie-weather at world.std.com" [aussie-weather at world.std.com]
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All:
Michael Scollay wrote the following and much more:
> I've got to admit...a great discussion that I've just read
> through during my lunch break. But...and there is always a
> "but..." when my neurones get firing...I've been mucking
> around with this radar image analysis program when it just
> hit me...why the hell are we tracking the storm "after the
> event" when surely, there must be an easier way of predicting
> where that storm will go...If humidity is such a big factor
> in fuelling severe storms, then why can't we estimate this
> "fuel" as "parcel potential" and plot it in 3D? My crazy
> imagination of this pictures the storm propagating in a way
> and direction that is a function of its "fuel in", "waste
> out" and environmental steering...like a giant vacuum-beast,
> it goes in a way that is sustained only as long as the
> function can keep it going. If the model were detailed
> enough, it could factor-in other landform types such as
> city and suburban landscapes etc. etc.
I am short on time and can not now afford to respond to this as it
deserves. However, please allow me to make a comment or two.
Storms do not have a 'mind' of there own......although it sometimes seems
that way. The development of "fresh updraft" or updraft propagation
usually occurs along a boundary of some sort (sea breeze, cold front, warm
front, outflow boundary, etc.) or along a moisture "axis". These
boundaries are focal points (lines) of moisture and airflow convergence and
pooling of moisture. Thus, storms will 'move' along these boundaries
because the updraft is 'tied' to that zone and then interacts with the
upper level steering currents. In addition, some boundaries such as cold
fronts often are associated with what is called a "secondary circulation"
caused by "ageostrophic" flow. In other words, at times the upper level
atmospheric flow will be forced in such a manner that the wind flow will be
too strong for the upper-level pressure or height gradients. In order to
attempt to reestablish balance the secondary vertical circulation will
create regions of both subsidence and rising motions. The subsidence will
often also create regions of higher surface temps along these boundaries
(which can also create additional CAPE). This air may then be advected
into the storm. Further, the compensatory upward vertical motion field of
this secondary circulation will then encourage or create storm formation
and updraft propagation and motion. Finally, of course, the storm's own
circulation and interaction with its' environment will provide a motion or
propagation force. For example the low level storm gust front will force
low level convergence. This convergence region will not uncommonly find
itself beneath an upper level pressure deficit created by the storms
interaction with the upper level flow. Thus, updraft propagation and
motion is perpetuated.
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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003
From: Dion Williams [onamission at start.com.au]
To: "aussie-weather at world.std.com" [aussie-weather at world.std.com]
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Date: Wed, 19 Jan 2000 07:06:12 +1000
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Subject: aus-wx: Re: and almost 9 years since...
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John Woodbridge wrote:
>Of course, given this speed of forward motion, a weak F0 tornado
would also
>manifest as straight line wind damage. Certainly some of the
observed
>damage is consistent with a tornado, i.e., a 1m diameter tree
deposited root
>ball first through the roof of a house.
>However, I think it unlikely given the observed structure of the
storm.
The hilly terrain of the North Shore would probably have inhibited any
rotational development. Certainly though, given that the lifting
forces of a tornado weren't present, that kind of damage IMO could
only be produced by straight-line winds in excess of 200km/h.
Another interesting feature of the storm's behaviour that the BOM
noted was its rapid acceleration as it approached the North Shore. Any
ideas as to what might cause this?
Dion
__________________________________________________________________
Get your free Australian email account at start.com.au
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004
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Date: Wed, 19 Jan 2000 09:11:59 +1100
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From: Jimmy Deguara [jdeguara at ihug.com.au]
Subject: aus-wx: heading up again
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I will gradually head up the coast yet again for just some good shots and
high CAPE activity. Wills ee what happens as I make my way up the coast.
My mobile is 0408020468
At this stage I am going to stay up there NE NSW for the next 3 days or for
as long as the activity lasts.
Jimmy Deguara
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005
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Date: Wed, 19 Jan 2000 09:28:29 +1100
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From: Matt Smith [disarm at braenet.com.au]
Subject: aus-wx: NSW Chase
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Hi Everyone
Myself and James Harris will be chasing in the Hunter today, im leaving for
his place now, we will base ourselves more than likely at Maitland, it has
roads NE/NW so we can keep an eye on things. -4 LI, 1800 CAPE, only real
problem is moisture, but we remain hopefull
Any updates would be most appreciated.
My phone : 0407 069 693
James Harris : 0414 912 191
Thanks
Matt Smith
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006
From: Boskell Andrew [andrew.boskell at dchs.tas.gov.au]
To: "'MetMail'" [aussie-weather at world.std.com]
Subject: aus-wx: Thunderstorm Activity!
Date: Wed, 19 Jan 2000 10:24:27 +1100
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G'day All,
This is my first venture into this forum. I've noticed a lack of weather
"news" coming from Tassie so I'd better change that! We had some
Thunderstorm activity around last night. A cold front developed nicely as it
passed over the State. There wasn't enough activity to bother getting out of
bed though....I tried..but I just could get out...sad I know! :-) But if
things had picked-up I would have made the effort! It has been quite mild
and humid for Tassie standards over the past couple of weeks. Saturday
afternoon a large single Cb cell grew very rapidly just North of the Central
Plateau and showed up nicely on the radar. Also picked up the lightning
clicks from the storm on the radio to confirm it was a thunderstorm. Things
have been very dry down here, not what I was expecting during a La Nina
situation.
> andrew Boskell
> IT Officer (Infrastructure)
> Information Technology Services
> Department of Health and Human Services
> Parkside
> PO Box 258 Burnie,
> Tasmania 7320
> andrew.boskell at dchs.tas.gov.au
> Ph.6440 7061
>
"If At First You Don't Succeed ... blame Someone Else And Seek Counselling.
"
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007
Date: Wed, 19 Jan 2000 10:44:39 +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: Savage Monsoonal Storm
Sender: aussie-weather-approval at world.std.com
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Ben Quinn wrote:
>
> Hi Paul, Everyone..
>
> Paul.Mossman at DWNNICH.OCA.nt.gov.au wrote:
> >
> > Hi all.
> <>
> > Lightning lasted well over 2 hours!!!! With thunder so loud and
> > forcible that it actually moved you physically.
>
> Thunder that actually moves you PHYSICALLY!!! Can't say i've ever
> experienced that.. but it sounds good!
True enough! While I was studying for my HSC back in 1978, a
decent thunderstorm moved through Katoomba one balmy spring
afternoon. CG lightning struck a radiata pine tree in the
back of our neighbour's yard, splitting the top 3m or so
right off the tree. I swear that the glass sliding door
very nearly jumped off its track as I just happened to be
watching it at the time. The crack/noise was so loud that
it left my ears ringing, the TV and its aerial electronics
damaged.
Michael Scollay mailto:michael.scollay at telstra.com.au
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008
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: aus-wx: Warmest so far this summer
To: aussie-weather at world.std.com (Aussie Weather)
Date: Wed, 19 Jan 2000 10:50:43 +1100 (EST)
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Andamooka in South Australia scored 47 yesterday, the warmest in
Australia so far this summer. There were numerous 46s in South Australia
, mostly in the north but with one at Renmark Airport, as well as one
at White Cliffs in NSW.
Nhill's 44 was the highest in Victoria.
None of this was close to record territory - but still a reasonably
impressive hot spell.
Blair Trewin
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009
Date: Wed, 19 Jan 2000 08:12:35 +0800
From: Mark Dwyer [mjd at wantree.com.au]
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To: "aussie-weather at world.std.com" [aussie-weather at world.std.com]
Subject: aus-wx: Another TC to the North of WA
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Hi all MJ here, well what do we have here yet another possible " TC "
hmmmmm well i guess by the end of the day we should know what is
happening with it.
IDW01W90
BUREAU OF METEOROLOGY
Northern Territory Region
Darwin Regional Forecasting Centre
40:0:1:24:11S127E999:11:00
PANPAN
HIGH SEAS WEATHER WARNING
HIGH SEAS WEATHER WARNING FOR METAREA 10/11
Issued by the AUSTRALIAN BUREAU OF METEOROLOGY, DARWIN
at 1930 UTC 18 JANUARY 2000
GALE WARNING FOR NORTHERN AREA
SITUATION
At 1800 UTC Tropical Low 998 hPa centred within 60 nautical miles of
11.0 S
127.0 E moving west-southwest at 05 knots. The low is expected to
develop into a
tropical cyclone in the next 6-18 hours.
AREA AFFECTED
Within 60 nautical miles of the centre, and within 120 nautical
miles of the centre in the northwest semicircle.
FORECAST
Winds 25/35 knots within 120 nautical miles from the centre in northwest
semicircle. Elsewhere clockwise winds 20/30 knots within 120 nautical
miles of
centre, expected to increase to 30/40 knots within 6-18 hours within 60
nautical
miles of the centre. Rough to very rough seas and rising swell.
0600 UTC 19 January: 11.2 S 126.0 E 990 hPa. Winds to 35 knots near
centre.
[CORRECTED TIME]
1800 UTC 19 January: 11.5 S 125.0 E 988 hPa. Winds to 40 knots near
centre.
REMARKS
Ships in the general area please transmit 3-hourly weather reports.
DARWIN Tropical Cyclone Warning Centre
MJ.
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010
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Date: Wed, 19 Jan 2000 11:35:40 +1100
To: aussie-weather at world.std.com
From: Miguel de Salas [mm_de at postoffice.utas.edu.au]
Subject: Re: aus-wx: Savage Monsoonal Storm
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I was wondering whether an experience I had is normal: I was doing some
work in the basement at home back in Spain, where thunderstorms are much
more common than here in Tassie, and it had been raining for several days
previously, so the ground was quite saturated. We had a fabulous morning
storm, and quite a few CGs so close that lightning and thunder were
simultaneous (The house is atop a hill). Several of these caused the
fluorescent tubes on the ceiling to light up for about a second immediately
after the lightning. I assume they hit very close to the house, but I had
never heard of fluorescent lights lighting up... any explanations?
Miguel de Salas
School of Plant Science,
University of Tasmania,
PO Box 252-55, Sandy Bay, Hobart
Tasmania, Australia, 7001.
mailto://mm_de at postoffice.utas.edu.au
My Moths Page:
http://members.xoom.com/migueldes/moths/moths.html
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011
Date: Wed, 19 Jan 2000 12:04:21 +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: ASWA Minor Flood Warning Northern NSW
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
[snip heaps]
The emphasis is on an "open forum". Once it becomes closed,
it is then not worth the trouble to read. All people are
entitled to take or leave whatever is offered on the list,
but prudence should dictate that they take info off the
list at their own risk. Such a statement is implied but
not stated explicitly anywhere I know of. This is one of
the accepted internet modus operandi that I don't know
has ever been tested in the legal sense. This leaves a
role for the person offering the info in first place...
Paul has mentioned some important points but it is wise
to note that the NSW Department of Fair Trading (DoFT)
is still in the throws of reviewing model rules etc. in
the light of more "virtual associations" like ASWA that
have recently been formed. You could say the the legal
frameworks are way behind what really is happening. That
leaves issues like ASWA's exposure to potential liabilities
wide open. ASWA don't exercise model rules in their
entirety (See below). In any event, it is not wise the
throw caution to the wind...
The Department of Fair Trading has, and ASWA have adopted
the model rules of an association with some ammendments.
It stippulates that official statements from ASWA must
bear the "Association's seal", noting them as official
communications from ASWA...The implication for an
individual on the list who is an ASWA member is unclear.
ASWA havn't stated in their ammendments what constitutes
"official communications" (Michael Bath please note). A
statement should be added that simply reads "The opinions
represented herein are my own and not those of ASWA Inc."
signed ", ASWA Inc." if you so wish
or just sign it as an individual or alias without any
reference to ASWA. That's the easy way.
If that is too hard to manage, then it might be a good
idea to ask the list manager to add a disclaimer to the
trailer.
Other than the above, ASWA members can agree that the
list is not an official voice of ASWA Inc. (it isn't)
and say so in an ASWA model rule ammendment, but before
that is done, something said by a member in an open forum
such as the list, if it carries an ASWA inference, makes
it a little hard to prove zero ASWA involvement. There
remains some very slight litigation risk to the person
and ASWA in any case until the ammendment is adopted.
(I don't want to bring "Code of Conduct" into review)
It is unlikely that any litigation would arise out of
normal list info, but in the area of issueing "warnings",
the profile and stakes are raised somewhat. Perhaps some
legal-eagle on this list has an opinion:-) Basically, we
can easily say something like..."Jeez, the north arm of
the Richmond River looks like flooding. Perhaps the BoM
should look into it...". This reads a lot different to
"MINOR FLOOD WARNING: Northern River system, Richmond
River, north arm...". Get my drift? Basically, cover
your ASWA arse as we don't want to get it sued off us.
Better to be a little careful with what we say and how
we say it, particularly when the words are associated
with ASWA and lives are potentially at risk.
I'm not trying to be an alarmist or piss people like
Halden off - he was right to raise an alarm. There's
just a less risky (to both the individual and ASWA)
way of doing it.
If the BoM is proactive then they will be watching the
list and picking off what they want and need. If they
are really proactive then someone from the BoM would
specify a prefered format and procedure for info
delivery. If the BoM miss some important clue or obs
and some major calamity results, then dare I say it,
"the BoM will wear it..." as they have done so in the
recent past. The last thing I want is for some enquiry,
ministerial or media, going on some witch hunt that
involves an ASWA member or someone else from the list.
I hope this discussion has been helpful...
P.S. Note that I didn't sign this E-Mail in my official
ASWA capacity as Treasurer...
Michael Scollay
mailto:michael.scollay at telstra.com.au
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-----------------------jacob at iinet.net.au------------------------------
012
From: "Jane ONeill" [cadence at rubix.net.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Welcome
Date: Wed, 19 Jan 2000 12:03:10 +1100
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Welcome to Andrew & Miguel from Tasmania!!!
......... now this should start filling in a couple of the gaps in the big
picture for us all - we now have aussie weather members & ASWA people in
Hobart, Burnie, Strahan, Devonport, Leslie Vale (btw, where is that
exactly?).
Jane ONeill
ASWA - Victoria / Tasmania
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013
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Date: Wed, 19 Jan 2000 12:32:24 +1100
From: "Ian Weller" [IYW at rbfb.tas.gov.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Welcome
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Hi Jane!
Leslie Vale is about 19 k South of Hobart near the Mt Wellington foothills!
cheers
Ian
>>> "Jane ONeill" 01/19/00 12:03pm >>>
Welcome to Andrew & Miguel from Tasmania!!!
......... now this should start filling in a couple of the gaps in the big
picture for us all - we now have aussie weather members & ASWA people in
Hobart, Burnie, Strahan, Devonport, Leslie Vale (btw, where is that
exactly?).
Jane ONeill
ASWA - Victoria / Tasmania
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014
From: Lyle Pakula [LyleP at oakton.com.au]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: RE: aus-wx: Savage Monsoonal Storm
Date: Wed, 19 Jan 2000 12:37:52 +1100
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Hi,
i'm sure someone else probably has a better explination, but i'll give it a
shot.
A bolt of lightning is a column (don't get picky here ;) ) of moving charge
(current), which induces a electro-magnetic field (EMF). However, the
current is changing. To convince yourself of this, consider that at some
time, there is no charge, then there is (when the bolt strikes) and then
there isn't again (bolt gone). This changing current will produce a changing
EMF. The effect of a changing EMF field is such to induce a voltage (this is
there regardless of whether a conducting medium is within the field or not).
So as your flouro is within this field, it also has an induced voltage,
exciting up the neon atoms (is it neon in a flouro?) and viola, light.
As a side point, this give you an idea of the voltage induced because you
need >1kV to get neon going. Your flouro has a capacitor in it to get the
neon going initially but considering the time of the lightining bolt, you
can be sure the capacitor is not getting used and this voltage is purely due
to the induced field - that'll make your hair stand up! ;)
cheers,
Lyle
-----Original Message-----
From: Miguel de Salas [mailto:mm_de at postoffice.utas.edu.au]
Sent: Wednesday, 19 January 2000 11:36
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Savage Monsoonal Storm
I was wondering whether an experience I had is normal: I was doing some
work in the basement at home back in Spain, where thunderstorms are much
more common than here in Tassie, and it had been raining for several days
previously, so the ground was quite saturated. We had a fabulous morning
storm, and quite a few CGs so close that lightning and thunder were
simultaneous (The house is atop a hill). Several of these caused the
fluorescent tubes on the ceiling to light up for about a second immediately
after the lightning. I assume they hit very close to the house, but I had
never heard of fluorescent lights lighting up... any explanations?
Miguel de Salas
School of Plant Science,
University of Tasmania,
PO Box 252-55, Sandy Bay, Hobart
Tasmania, Australia, 7001.
mailto://mm_de at postoffice.utas.edu.au
My Moths Page:
http://members.xoom.com/migueldes/moths/moths.html
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015
From: "John Woodbridge" [jrw at pixelcom.net]
To: [aussie-weather at world.std.com]
Subject: RE: aus-wx: ASWA Minor Flood Warning Northern NSW
Date: Wed, 19 Jan 2000 11:27:09 +1000
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Hi All,
I guess my general concern would be as follows: ASWA members makes use of
various information currently curtesy of the BoM, e.g., radar. If it is
presumed that we abuse that privilege (and I am not saying that Halden did
in this case, or in fact, use any information sourced from the BoM) by
making forecasts in public places (the list is a public forum),and in
particular, cast aspersions as to the BoM's efficacy, then we might have our
priviledges withdrawn.
John.
>snip
But I also see where Blair is coming from - these days of liability,
the fact that the BOM are in the marketplace as a provider now
rather then as a supplier, etc and the nature of relationship with the
BOM that the ASWA exec are trying to nurture - but I really dont
think that the BOM would have even bat an eyelid over it - I mean
Haldens very first line says that he puts the "aus-wx people" on
notice.
Maybe Blairs email can be more a warning of what we as an
individual do with that information - always remember that this is
purely a open forum and not in an official capacity - and nothing
said on this list to be used as either!
Rgds, Paul.
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-----------------------jacob at iinet.net.au------------------------------
016
From: "John Woodbridge" [jrw at pixelcom.net]
To: [aussie-weather at world.std.com]
Subject: RE: aus-wx: Savage Monsoonal Storm
Date: Wed, 19 Jan 2000 11:47:03 +1000
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Hi Miguel,
Probably not normal, but can be explained. Flourescent tubes are actually
remarkably sensitive to low current flow, and can glow faintly even in the
presence of an electric field, e.g., take a tube out to some HT powerlines
at night, stand under them and point the tube at the lines (make use you are
holding the electrode). It will glow faintly. Presumably a CG set up a
massive electric field in the ground, which took a second or so to disperse.
The fact that the tubes effectively would have had lengths of wire attached
to each end (to as far as the switch), probably helped increase the effect.
John
>snip
I was wondering whether an experience I had is normal: I was doing some
work in the basement at home back in Spain, where thunderstorms are much
more common than here in Tassie, and it had been raining for several days
previously, so the ground was quite saturated. We had a fabulous morning
storm, and quite a few CGs so close that lightning and thunder were
simultaneous (The house is atop a hill). Several of these caused the
fluorescent tubes on the ceiling to light up for about a second immediately
after the lightning. I assume they hit very close to the house, but I had
never heard of fluorescent lights lighting up... any explanations?
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-----------------------jacob at iinet.net.au------------------------------
017
X-Sender: mm_de at postoffice.utas.edu.au
X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32)
Date: Wed, 19 Jan 2000 13:06:49 +1100
To: aussie-weather at world.std.com
From: Miguel de Salas [mm_de at postoffice.utas.edu.au]
Subject: RE: aus-wx: Savage Monsoonal Storm
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
At 12:37 PM 19-01-2000 +1100, you wrote:
>Hi,
>
>i'm sure someone else probably has a better explination, but i'll give it a
>shot.
>
>A bolt of lightning is a column (don't get picky here ;) ) of moving charge
>(current), which induces a electro-magnetic field (EMF). However, the
>current is changing. To convince yourself of this, consider that at some
>time, there is no charge, then there is (when the bolt strikes) and then
>there isn't again (bolt gone). This changing current will produce a changing
>EMF. The effect of a changing EMF field is such to induce a voltage (this is
>there regardless of whether a conducting medium is within the field or not).
>So as your flouro is within this field, it also has an induced voltage,
>exciting up the neon atoms (is it neon in a flouro?) and viola, light.
>
>As a side point, this give you an idea of the voltage induced because you
>need >1kV to get neon going. Your flouro has a capacitor in it to get the
>neon going initially but considering the time of the lightining bolt, you
>can be sure the capacitor is not getting used and this voltage is purely due
>to the induced field - that'll make your hair stand up! ;)
>
>cheers,
>Lyle
>
It's not funny... My hair did stand up on several occasions that day :)
Probably lightning about to hit the general vicinity...
Miguel de Salas
School of Plant Science,
University of Tasmania,
PO Box 252-55, Sandy Bay, Hobart
Tasmania, Australia, 7001.
mailto://mm_de at postoffice.utas.edu.au
My Moths Page:
http://members.xoom.com/migueldes/moths/moths.html
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-----------------------jacob at iinet.net.au------------------------------
018
From: Paul.Mossman at DWNNICH.OCA.nt.gov.au
To: " - *aussie-weather at world.std.com" [aussie-weather at world.std.com]
Subject: aus-wx: Models
Date: Wed, 19 Jan 2000 11:53:07 +0930
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Hi all.
Models show some interesting predictions for the coming days -
esp US COLA MRF at 120 - 144hr (yeah I know its way off but still......) shows
the Possible TC hitting the WA Coast around the same area as TC John - perhaps
a little further South while theres either a deep Tropical Low / or TC over the
Coral sea swinging back towards QLD Coast.
Will be interesting to see how the models develop in reality.
Paul.
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-----------------------jacob at iinet.net.au------------------------------
019
From: Lyle Pakula [LyleP at oakton.com.au]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: RE: aus-wx: Savage Monsoonal Storm
Date: Wed, 19 Jan 2000 13:30:49 +1100
X-Mailer: Internet Mail Service (5.5.2448.0)
Sender: aussie-weather-approval at world.std.com
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hi,
wow - if you hair was standing up you must have truly been in a strong
field. Considerring this is work, were you going for hazard pay ;)
This reminds of a picture in my physics book of a girl standing there with
her her hair standing up (you had to estimate the voltgae causing it). I saw
the same photo on one of those storm shows not long ago, and they filled in
that two of her friends died a few minutes latter due to a CG.
Cheers,
Lyle
-----Original Message-----
From: Miguel de Salas [mailto:mm_de at postoffice.utas.edu.au]
Sent: Wednesday, 19 January 2000 13:07
To: aussie-weather at world.std.com
Subject: RE: aus-wx: Savage Monsoonal Storm
At 12:37 PM 19-01-2000 +1100, you wrote:
>Hi,
>
>i'm sure someone else probably has a better explination, but i'll give it a
>shot.
>
>A bolt of lightning is a column (don't get picky here ;) ) of moving charge
>(current), which induces a electro-magnetic field (EMF). However, the
>current is changing. To convince yourself of this, consider that at some
>time, there is no charge, then there is (when the bolt strikes) and then
>there isn't again (bolt gone). This changing current will produce a
changing
>EMF. The effect of a changing EMF field is such to induce a voltage (this
is
>there regardless of whether a conducting medium is within the field or
not).
>So as your flouro is within this field, it also has an induced voltage,
>exciting up the neon atoms (is it neon in a flouro?) and viola, light.
>
>As a side point, this give you an idea of the voltage induced because you
>need >1kV to get neon going. Your flouro has a capacitor in it to get the
>neon going initially but considering the time of the lightining bolt, you
>can be sure the capacitor is not getting used and this voltage is purely
due
>to the induced field - that'll make your hair stand up! ;)
>
>cheers,
>Lyle
>
It's not funny... My hair did stand up on several occasions that day :)
Probably lightning about to hit the general vicinity...
Miguel de Salas
School of Plant Science,
University of Tasmania,
PO Box 252-55, Sandy Bay, Hobart
Tasmania, Australia, 7001.
mailto://mm_de at postoffice.utas.edu.au
My Moths Page:
http://members.xoom.com/migueldes/moths/moths.html
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-----------------------jacob at iinet.net.au------------------------------
020
From: Lyle Pakula [LyleP at oakton.com.au]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: aus-wx: fluro's and lightning
Date: Wed, 19 Jan 2000 13:54:22 +1100
X-Mailer: Internet Mail Service (5.5.2448.0)
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G'day John,
I'm not so sure this is fully correct. You'r saying that the glow is due to
a small current but that doesn't give the link to the lightning bolt.
Lets use your example of the HT lines. Lets say it's suspended by a
non-conductive material, so there is no direct source for current. The fluro
will still glow. This is due to the voltage induced by the changing EM field
which excites the atoms to relase photons in the visible range (you could do
a calculation here to quanitfy the required voltage, but it would be well
documented). The low power requirments is because not much energy is
required to eject a photon by voltage induced excitation - the main power
sink is charging the capacitor to get the fluro going in the first place. A
convential light source produces the photons via thermal excitation,
requiring a continual feed of power, at a higher rate, so to raise and
maintain the tempreture of the fillament.
BTW: Fluro's lighiting up in strong EMF fields would be very normal, prolly
not normal to have one lying about when a bolt strikes and noticing it light
up though ;)
-----Original Message-----
From: John Woodbridge [mailto:jrw at pixelcom.net]
Sent: Wednesday, 19 January 2000 12:47
To: aussie-weather at world.std.com
Subject: RE: aus-wx: Savage Monsoonal Storm
Hi Miguel,
Probably not normal, but can be explained. Flourescent tubes are actually
remarkably sensitive to low current flow, and can glow faintly even in the
presence of an electric field, e.g., take a tube out to some HT powerlines
at night, stand under them and point the tube at the lines (make use you are
holding the electrode). It will glow faintly. Presumably a CG set up a
massive electric field in the ground, which took a second or so to disperse.
The fact that the tubes effectively would have had lengths of wire attached
to each end (to as far as the switch), probably helped increase the effect.
John
>snip
I was wondering whether an experience I had is normal: I was doing some
work in the basement at home back in Spain, where thunderstorms are much
more common than here in Tassie, and it had been raining for several days
previously, so the ground was quite saturated. We had a fabulous morning
storm, and quite a few CGs so close that lightning and thunder were
simultaneous (The house is atop a hill). Several of these caused the
fluorescent tubes on the ceiling to light up for about a second immediately
after the lightning. I assume they hit very close to the house, but I had
never heard of fluorescent lights lighting up... any explanations?
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-----------------------jacob at iinet.net.au------------------------------
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021
From: "weatherhead" [weatherhead at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Hot in Sydney's west!!
Date: Wed, 19 Jan 2000 14:31:25 +1100
X-Mailer: Microsoft Outlook Express 5.00.2615.200
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hey everyone!
It seems summer, well the hot part of it, has
arrived in Sydneys west.
The temperature has rapidly climbed in Sydney's
west. At 12pm it was 29.0 degrees in Penrith, and at 2pm it was 40.7, a 12
degree rise in the last two hours. Finally some hot weather in
Sydney.
Daniel Weatherhead
022
From: "John Graham" [gorzzz at optusnet.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Savage Monsoonal Storm
Date: Wed, 19 Jan 2000 14:38:01 +1100
X-Mailer: Microsoft Outlook Express 5.00.2014.211
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
----- Original Message -----
From: John Woodbridge [jrw at pixelcom.net]
To: [aussie-weather at world.std.com]
Sent: Wednesday, January 19, 2000 12:47 PM
Subject: RE: aus-wx: Savage Monsoonal Storm
> Hi Miguel,
>
> Probably not normal, but can be explained. Flourescent tubes are actually
> remarkably sensitive to low current flow, and can glow faintly even in the
> presence of an electric field, e.g., take a tube out to some HT powerlines
> at night, stand under them and point the tube at the lines (make use you
are
> holding the electrode). It will glow faintly. Presumably a CG set up a
> massive electric field in the ground, which took a second or so to
disperse.
> The fact that the tubes effectively would have had lengths of wire
attached
> to each end (to as far as the switch), probably helped increase the
effect.
>
> John
> >snip
The same thing happens when you put the end of a tube at the end of a CB
antenna on a car when someone is transmitting ........the end lights up with
your modulation......5w AM is ok, 12w SSB is better.........
John
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-----------------------jacob at iinet.net.au------------------------------
023
X-Sender: paisley at mail.cobweb.com.au
Date: Wed, 19 Jan 2000 14:10:49 +0930
To: aussie-weather at world.std.com
From: Phil Bagust [paisley at cobweb.com.au]
Subject: Re: aus-wx: Savage Monsoonal Storm
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
>I was wondering whether an experience I had is normal: I was doing some
>work in the basement at home back in Spain, where thunderstorms are much
>more common than here in Tassie, and it had been raining for several days
>previously, so the ground was quite saturated. We had a fabulous morning
>storm, and quite a few CGs so close that lightning and thunder were
>simultaneous (The house is atop a hill). Several of these caused the
>fluorescent tubes on the ceiling to light up for about a second immediately
>after the lightning. I assume they hit very close to the house, but I had
>never heard of fluorescent lights lighting up... any explanations?
>
>Miguel de Salas
The subject of induced current has been taken care of, so i won't bother
going into that, but I do remember years ago a friend of mine was renting a
house almost directly beneath a 50kw radio transmitter near Port Pirie. I
stayed with him one night and he took a normal 20w flouro tube out, got as
close to the tower as he was able (barbed wire around the base) and low and
behold, the thing lit up just as brightly as it had inside! I started to
worry about accumulated exposure to radiation in that house after
that.......
Phil 'Paisley' Bagust
paisley at cobweb.com.au
http://www.chariot.net.au/~paisley2
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024
X-Originating-IP: [203.101.79.35]
From: "Halden Boyd" [haldenboyd at hotmail.com]
To: aussie-weather at world.std.com
Subject: RE: aus-wx: Pulling out of aswx
Date: Tue, 18 Jan 2000 19:55:27 PST
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
This will be my last auswx transmission....good luck and don't get caught up
in too much bullsh*t. I would rather watch the skies anyway.
Nice knowing those who appreciated the presence here.
Halden
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
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025
From: Lyle Pakula [LyleP at oakton.com.au]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: aus-wx: fluro's
Date: Wed, 19 Jan 2000 15:11:11 +1100
X-Mailer: Internet Mail Service (5.5.2448.0)
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
G'day Phil,
I guy I knew a while ago told me a story of a friend he had who lived near
HT lines. Anyway, he set up a coil around the base of the tower and stole
power off the grid to run his house, for some time apparently. Gives you an
idea of how much EMF there is!
Though if your worried about EM radiation, consider your mobile phone on
your hip all day giving you that slow sterilization but atleast it's free ;>
cya,
Lyle
-----Original Message-----
From: Phil Bagust [mailto:paisley at cobweb.com.au]
Sent: Wednesday, 19 January 2000 15:41
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Savage Monsoonal Storm
>I was wondering whether an experience I had is normal: I was doing some
>work in the basement at home back in Spain, where thunderstorms are much
>more common than here in Tassie, and it had been raining for several days
>previously, so the ground was quite saturated. We had a fabulous morning
>storm, and quite a few CGs so close that lightning and thunder were
>simultaneous (The house is atop a hill). Several of these caused the
>fluorescent tubes on the ceiling to light up for about a second immediately
>after the lightning. I assume they hit very close to the house, but I had
>never heard of fluorescent lights lighting up... any explanations?
>
>Miguel de Salas
The subject of induced current has been taken care of, so i won't bother
going into that, but I do remember years ago a friend of mine was renting a
house almost directly beneath a 50kw radio transmitter near Port Pirie. I
stayed with him one night and he took a normal 20w flouro tube out, got as
close to the tower as he was able (barbed wire around the base) and low and
behold, the thing lit up just as brightly as it had inside! I started to
worry about accumulated exposure to radiation in that house after
that.......
Phil 'Paisley' Bagust
paisley at cobweb.com.au
http://www.chariot.net.au/~paisley2
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026
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: ASWA Minor Flood Warning Northern NSW
To: aussie-weather at world.std.com
Date: Wed, 19 Jan 2000 15:19:36 +1100 (EST)
X-Mailer: ELM [version 2.5 PL2]
Sender: aussie-weather-approval at world.std.com
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Really the only exception I took to Halden's original posting was
the heading 'ASWA MINOR FLOOD WARNING'. No problems whatsoever
with the content.
For what it's worth, hopefully someone in Severe Weather does keep an
eye on the list - there's a lot of useful information out of it that
could be input into warnings (especially in radar holes) - remember
Michael Thompson's postings in the lead-up to the Sydney hailstorm?
(Also, are all the regular chasers on the list registered as storm
spotters?)
Blair Trewin
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027
From: Patrick_Tobin at ama.com.au
X-Lotus-FromDomain: AMA at TNPN
To: aussie-weather at world.std.com
Date: Wed, 19 Jan 2000 15:21:03 +1000
Subject: aus-wx: Trough brings great cu to Canberra
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
The trough has passed through Canberra in the last hour or so (ie around 1-2
pm).
Its features included some great fair weather cu - about 6 of them developed and
lasted for about 30 min or so. I chased for about 10 min and was rewarded by
some great vertical development - at one stage the base to top must have
exceeded 10 metres!! Updrafts were shooting up at around 2cm/hr (sadly no video
shots).
With the excitement over the sky has now gone back to clear and the wind has
gradually shifted to a westerly (was NNW ahead of the trough). Temp is
holding up at around 34 with the DP now falling currently around 9 from a
"high" of around 13 ahead of the trough)
On a more serious note, Canberra Airport is currently sitting on 0.4mm so far
this
month (average = 62.4, median 49.3) and although it is a bit early to be
talking of records with 11 days to go, the models arn't exactly suggesting
anything that Noah would have to be bothered about. I think 0.4mm would be
a new record low for January - we'll have to see what Huey brings in the
next week or so.
As a matter of interest, in terms of using the SOI as a rainfall predictor for
an individual station, I recall a January a couple of years ago during an
El Nino year that produced from memory a highest daily rain total that was at
or close to a record level. Some good storms that year in contrast to this
year's
(so far) La Nina dry. Perhaps I should be saying bring on the El Nino....
Patrick
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028
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: Hot in Sydney's west!!
To: aussie-weather at world.std.com
Date: Wed, 19 Jan 2000 15:22:41 +1100 (EST)
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>
> This is a multi-part message in MIME format.
>
> ------=_NextPart_000_001D_01BF6289.DD8B51C0
> Content-Type: text/plain;
> charset="iso-8859-1"
> Content-Transfer-Encoding: quoted-printable
>
> Hey everyone!
> It seems summer, well the hot part of it, has arrived in Sydneys west.
>
> The temperature has rapidly climbed in Sydney's west. At 12pm it was =
> 29.0 degrees in Penrith, and at 2pm it was 40.7, a 12 degree rise in the =
> last two hours. Finally some hot weather in Sydney.
>
Over 40 now at most of the western Sydney sites (41.5 at Penrith).
30.0 is the highest I've seen at Observatory Hill, though.
Blair Trewin
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029
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: aus-wx: One of my pet hates...
To: aussie-weather at world.std.com (Aussie Weather)
Date: Wed, 19 Jan 2000 15:41:31 +1100 (EST)
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...is cricket commentators exaggerating the humidity and/or heat
at games.
I've just witnessed Jim Maxwell claiming that the humidity at the SCG
was 'near 100%'. For the record, the current conditions at the sites
closest to the SCG are:
Observatory Hill Temp 29.8, RH 58%
Sydney Airport Temp 34.2, RH 41%
Dewpoints around 20, certainly high, but 30 degrees and 100% requires
a dewpoint of 30, and that is rare anywhere in the world; near the
Persian Gulf and Red Sea and that's about it.
(I've also seen claims of 45 degrees at Madras during the 1986 Tied
Test; 35 degrees and 60-70% humidity would be more like it, still
highly unpleasant!)
Blair Trewin
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030
From: "John Graham" [gorzzz at optusnet.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: ASWA Minor Flood Warning Northern NSW
Date: Wed, 19 Jan 2000 15:41:58 +1100
X-Mailer: Microsoft Outlook Express 5.00.2014.211
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[snip]
> (Also, are all the regular chasers on the list registered as storm
> spotters?)
Well I'm a spotter at least.....
John
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031
From: "John Graham" [gorzzz at optusnet.com.au]
To: "Aussie Weather" [aussie-weather at world.std.com]
Subject: aus-wx: NSW STA
Date: Wed, 19 Jan 2000 15:40:09 +1100
X-Mailer: Microsoft Outlook Express 5.00.2014.211
Sender: aussie-weather-approval at world.std.com
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SEVERE THUNDERSTORM ADVICE
BUREAU OF METEOROLOGY
NEW SOUTH WALES REGIONAL OFFICE
Issued at 1525 on Wednesday the 19th of January 2000
This advice affects people in the following weather districts:
North West Slopes and Plains
Thunderstorms are forecast within the advice area this afternoon and
evening. Some of these are expected to be severe bringing destructive winds.
The STATE EMERGENCY SERVICE advises that as storms approach people should:
* put vehicles under cover
* move indoors away from windows
During and after the storm people should:
* beware of fallen trees and power lines
The RTA recommends motorists switch their lights & wipers on & slow down in
the wet.
How many people listen to the RTA anyway?????
John
_________________________________________________________
John Graham
Email: gorzzz at optusnet.com.au or gorzzz at yahoo.com
Member of the Australian Severe Weather Assoc. (ASWA)
ASWA Homepage http://www.severeweather.asn.au/
ICQ# 25440353
Snail Mail : P.O.Box 1072
Ballina 2478 N.S.W
Australia
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032
Date: Wed, 19 Jan 2000 15:47:14 +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)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Pulling out of aswx
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Halden Boyd wrote Tue, 18 Jan 2000 19:55:27 PST:
>
> This will be my last auswx transmission....good luck and
> don't get caught up in too much bullsh*t. I would rather
> watch the skies anyway. Nice knowing those who appreciated
> the presence here.
> Halden
Very dissappointing Halden. The world is full of both
good crap and bad crap. We all need top roll with every
type of crap dished up anywhere. One thing is certain
though, the sky just keeps on changing and is forever
interesting like the events here on Earth no matter where
you are. That's why there is an aus-wx list and that's
why ASWA happened. If it could all happen without politics
and legalese, that would be preferred. But that's what
one needs to consider in running a formal org like ASWA.
Thanks for your reports. They are all needed...
Michael Scollay mailto:michael.scollay at telstra.com.au
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033
Date: Wed, 19 Jan 2000 15:48:17 +1100
From: Keith Barnett [weather at ozemail.com.au]
X-Mailer: Mozilla 4.6 [en] (Win95; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Hot in Sydney's west!!
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Seven Hills: Max so far 41.9. presently 40.0, DP 15 with some icy local
cumulus tops..
Blair Trewin wrote:
>
> >
> > This is a multi-part message in MIME format.
> >
> > ------=_NextPart_000_001D_01BF6289.DD8B51C0
> > Content-Type: text/plain;
> > charset="iso-8859-1"
> > Content-Transfer-Encoding: quoted-printable
> >
> > Hey everyone!
> > It seems summer, well the hot part of it, has arrived in Sydneys west.
> >
> > The temperature has rapidly climbed in Sydney's west. At 12pm it was =
> > 29.0 degrees in Penrith, and at 2pm it was 40.7, a 12 degree rise in the =
> > last two hours. Finally some hot weather in Sydney.
> >
> Over 40 now at most of the western Sydney sites (41.5 at Penrith).
> 30.0 is the highest I've seen at Observatory Hill, though.
>
> Blair Trewin
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034
Date: Wed, 19 Jan 2000 15:58:29 +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)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Trough brings great cu to Canberra
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Patrick_Tobin at ama.com.au wrote on Wed, 19 Jan 2000 15:21:03 +1000:
>
> The trough has passed through Canberra in the last hour or so
> (ie around 1-2 > pm).
>
> Its features included some great fair weather cu - about 6 of
> them developed and lasted for about 30 min or so. I chased for
> about 10 min and was rewarded by some great vertical development
> - at one stage the base to top must have exceeded 10 metres!!
> Updrafts were shooting up at around 2cm/hr (sadly no video shots).
Its about 15:50 here in Sydney as this massive trough moves
through. There's actually some cu now shooting to 100m above
their base...Bit of a non-event other than the heat...
---
IDN60013
Met Observations for Sydney and environs
Bureau of Meteorology, Sydney
Issued at 1547 on 19/01/2000 (no rain to report - MS edit)
-----------------------------------------------------------
STATION TIME CURRENT OBS [within last hour]
Temp RH Wind Press
local deg C % dir spd hPa
km/h -----------------------------------------------------------
BADGERY'S CREEK 1537 41.2 24 W 28 999
BANKSTOWN AIRPORT 1530 40.9 23 NW 24 998
BELLAMBI
CAMDEN 1500 39.5 24 N 9 999
CANTERBURY RACECOURSE 1530 37.2 39 ENE 17
GOSFORD 1500 39.1 30 NNW 11
HOLSWORTHY 1530 39.8 19 NNW 17
HOMEBUSH 1530 40.1 18 N 17
HORSLEY PARK 1530 41.7 16 W 41
LITTLE BAY 1530 NNE 33
LUCAS HEIGHTS 1515 39.4 NNW 13 1001
MANGROVE MT 1500 37.1 30 NW 18
MT. BOYCE 1525 31.8 31 W 35
NORAH HEAD 1530 25.0 80 NE 26 1000
OBSERVATORY HILL 1530 29.6 59 999
FORT DENNISON 1530 E 11
PENRITH LAKES 1543 41.9 16 WNW 28
RICHMOND AIRPORT 1532 41.0 19 W 28 999
SYDNEY AIRPORT 1530 35.1 41 NNE 28 998
WEDDING CAKE 1530 24.2 N 17
WOLLONGONG AP AWS 1500 30.3 60 ENE 24 998
-----------------------------------------------------------
Michael Scollay mailto:michael.scollay at telstra.com.au
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035
Date: Wed, 19 Jan 2000 16:15:33 +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)
X-Accept-Language: en
To: Aussie Weather [aussie-weather at world.std.com]
Subject: aus-wx: Storm lid lifting around Sydney...
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Very pretty site from Sydney City with nice Cu popping up from
the SW to NW. The light is catching it perfectly and I have
no camera:-( Fairly high bases 3000-4000m and tops going straight
up as if someone lifted the lid. No precip to report though there
is some action between Bathurst and Mudgee with a more active
bunch of cells south of Scone. Now all we need is that miracle
dose of hot-humid air from the Sydney basin...
Michael Scollay mailto:michael.scollay at telstra.com.au
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036
Date: Wed, 19 Jan 2000 16:16:55 +1100 (EST)
From: Robert Goler [robert at neumann.maths.monash.edu.au]
To: Aussie Weather [aussie-weather at world.std.com]
Subject: Re: aus-wx: One of my pet hates...
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi Blair
'Tis annoying when people exaggerate things like that. Although, you must
appreciate that not EVERYONE can determine what the exact temperature and
humidity is outside, especially by just by poking ones head outside of a
cool commentary box.
I would suggest that unless you are shown the correct figures of temp and
humidity under those conditions, you will continue to mistakenly assume
certain values for such quantities. And I doubt whether Jimmy boy would
spend copious amounts of time looking over weather data and saying to
himself, "Hmmmm, so this is what 34 degs and a RH of 41% feels like. I
must make a mental note!'. :)
Cheers
On Wed, 19 Jan 2000, Blair Trewin wrote:
> ...is cricket commentators exaggerating the humidity and/or heat
> at games.
>
> I've just witnessed Jim Maxwell claiming that the humidity at the SCG
> was 'near 100%'. For the record, the current conditions at the sites
> closest to the SCG are:
>
> Observatory Hill Temp 29.8, RH 58%
> Sydney Airport Temp 34.2, RH 41%
>
> Dewpoints around 20, certainly high, but 30 degrees and 100% requires
> a dewpoint of 30, and that is rare anywhere in the world; near the
> Persian Gulf and Red Sea and that's about it.
>
> (I've also seen claims of 45 degrees at Madras during the 1986 Tied
> Test; 35 degrees and 60-70% humidity would be more like it, still
> highly unpleasant!)
>
> Blair Trewin
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> -----------------------jacob at iinet.net.au------------------------------
>
--
Robert A. Goler
E-mail robert at neumann.maths.monash.edu.au
http://www.maths.monash.edu.au/~robert/
Department of Mathematics and Statistics
Monash University
Clayton, Vic 3168
Australia
--
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037
From: "John Woodbridge" [jrw at pixelcom.net]
To: [aussie-weather at world.std.com]
Subject: RE: aus-wx: fluro's and lightning
Date: Wed, 19 Jan 2000 15:15:11 +1000
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Hi Lyle,
I seem to recall that a flouro works via current flowing through the (low
pressure ionised) gas, which produces UV radiation. This interacts with the
phospher coating on the inside of the tube which flouresces to produce
visible light - hence the word flourescent lamp.
When a lamp is off, the gas is not ionised and is basically non-conducting.
The starter circuit ionises the gas by switching on a heating filament at
the end of the tube which releases metal ions, plus the ballast (inductor)
is used to produce a high voltage kick to break the gas down. Once the lamp
has started, the gas remains ionised by virtue of the AC current flow and
the heating filaments are switched off. I can't quite remember the purpose
of the Capacitor, it may be to protect the starter switch from arcing, or
simply to correct the powerfactor load of the ballast.
If you can supply a flouro with a high enough voltage (several KV) this will
also ionise the gas, and hence allow current to flow. And as previously
mentioned, only a very small current is required to generate a visible
result.
The magnetic component of the EM field around HT powerlines is basically
insignificant, but the electric field is substantial, being many KV per
meter between the line and ground. So the action on a flouro near HT
powerlines is purely due to electric field. You prove this by changing the
orientation of the tube, it only lights up when pointed at the lines, it
does not light up when oriented in any parallel plane to the lines. (Which
would be the case if your EM radiation theory was correct).
Lightning produces copious amounts of EM radiation, as is evidenced by the
crackles on radio. However, this is only instantaneous with the lightning.
I was picking up on the comment that the tubes glowed for a second
immediately AFTER the lightning.
So, I was suggesting that the CG transferred a large quantity of charge,
which appeared almost instantaneously in the ground at the location of the
CG. This must produce an electric field in the ground, which will quickly
decay as the charge leaks away. How quickly will depend upon the
conductivity of the ground. (It is this electric field near lightning
strikes which is responsible for most shocks due to lightning).
Seeing as Miguel was in a basement at ground level, it is not difficult to
imagine that the fluoro's and in particular the wires leading to it, were
subjected to the electric field with the consequent result.
Regards,
John.
p.s., the term EMF conventionally is short for Electro-Motive Force,
referring to the induced voltage in a conductor subject to a changing
magnetic field or moving through a magnetic field (the same thing
relatively).
>snip
G'day John,
I'm not so sure this is fully correct. You'r saying that the glow is due to
a small current but that doesn't give the link to the lightning bolt.
Lets use your example of the HT lines. Lets say it's suspended by a
non-conductive material, so there is no direct source for current. The fluro
will still glow. This is due to the voltage induced by the changing EM field
which excites the atoms to relase photons in the visible range (you could do
a calculation here to quanitfy the required voltage, but it would be well
documented). The low power requirments is because not much energy is
required to eject a photon by voltage induced excitation - the main power
sink is charging the capacitor to get the fluro going in the first place. A
convential light source produces the photons via thermal excitation,
requiring a continual feed of power, at a higher rate, so to raise and
maintain the tempreture of the fillament.
BTW: Fluro's lighiting up in strong EMF fields would be very normal, prolly
not normal to have one lying about when a bolt strikes and noticing it light
up though ;)
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038
From: "John Woodbridge" [jrw at pixelcom.net]
To: [aussie-weather at world.std.com]
Subject: RE: aus-wx: One of my pet hates...
Date: Wed, 19 Jan 2000 15:20:14 +1000
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They often talk about "pitch temperature", which you guessed it, means
thermometer in full sun. Jim Maxwell was probably sweating like a pig,
hence his definition of 100% humidity .
John.
-----Original Message-----
From: aussie-weather-approval at world.std.com
[mailto:aussie-weather-approval at world.std.com]On Behalf Of Blair Trewin
Sent: Wednesday, 19 January 2000 14:42
To: Aussie Weather
Subject: aus-wx: One of my pet hates...
...is cricket commentators exaggerating the humidity and/or heat
at games.
I've just witnessed Jim Maxwell claiming that the humidity at the SCG
was 'near 100%'. For the record, the current conditions at the sites
closest to the SCG are:
Observatory Hill Temp 29.8, RH 58%
Sydney Airport Temp 34.2, RH 41%
Dewpoints around 20, certainly high, but 30 degrees and 100% requires
a dewpoint of 30, and that is rare anywhere in the world; near the
Persian Gulf and Red Sea and that's about it.
(I've also seen claims of 45 degrees at Madras during the 1986 Tied
Test; 35 degrees and 60-70% humidity would be more like it, still
highly unpleasant!)
Blair Trewin
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039
From: "Jane ONeill" [cadence at rubix.net.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: ASWA Minor Flood Warning Northern NSW
Date: Wed, 19 Jan 2000 16:47:27 +1100
X-Mailer: Microsoft Outlook Express 5.00.2014.211
Sender: aussie-weather-approval at world.std.com
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> (Also, are all the regular chasers on the list registered as storm
> spotters?)
>
Almost all of the Victorians & Tasmanians are registered storm spotters.
Jane ONeill
ASWA - Victoria / Tasmania
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040
Date: Wed, 19 Jan 2000 16:56:39 +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: Storm lid lifting around Sydney...
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
[snip]
Michael Scollay wrote on Wed, 19 Jan 2000 16:15:33 +1100:
> ...
> Now all we need is that miracle dose of hot-humid air
> from the Sydney basin...
And boy, did that happen...Sydney narrow-scale of 0530UTC
sent my trial storm detection software berserk as a patch
of +100mm just appeared E off Sydney Heads. Another complex
of cells exhibiting 40-100 just exploded NNE of Waterfall.
This complex just went +100m at 0540UTC heading towards
Kernel in a ENE direction. Watch out...might be hail...
Michael Scollay mailto:michael.scollay at telstra.com.au
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041
From: Paul.Mossman at DWNNICH.OCA.nt.gov.au
To: " - *aussie-weather at world.std.com" [aussie-weather at world.std.com]
Subject: Re: aus-wx: Hot in Sydney's west!!
Date: Wed, 19 Jan 2000 15:29:53 +0930
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Is anyone in Sydney chasing that monster storm near the airport??
Massive area of pink on radar?? Looks lIke April last year all over again!
Paul.
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042
Date: Wed, 19 Jan 2000 17:00:27 +1100
From: Keith Barnett [weather at ozemail.com.au]
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To: "aussie-weather at world.std.com" [aussie-weather at world.std.com]
Subject: aus-wx: Storm warning
Sender: aussie-weather-approval at world.std.com
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This has just issued:
WARNINGS:
Strong wind warning for coastal waters.
A severe thunderstorm warning has been issued for the Greater Sydney
Area.
WHAT'S HAPPENING NOW:
Cloudy. A few showers and isolated storm has popped in the last ten
minutes.
Very hot in west.
Light to moderate northwest to northeast winds, moderate westerly far
inland.
Some local seabreezes about the coast.
CURRENT WEATHER DETAILS:
Weather
City Cloudy
Mascot Cloudy, showers/storm in area
Richmond Fine
Bankstown Cloudy
Sea swell 1.1 metres from the southeast.
WEATHER FOR NEXT FEW HOURS:
Remaining cloudy with isolated showers and thunderstroms now expected in
the
Sydney Metro Area. Isolated showers and thunderstorms on the ranges and
far
western metro area in the next one to two hours. Moderate to fresh
northeast to
north winds freshening ahead of a fresh to strong and gusty southerly
change
expected within the next hour.
>From here at Seven Hills it looks like storms will be concentrated over
the north shore. Still very hot/40 deg but there appears to be a line of
low cloud with the southerly change on the coast (rather hazy and hard
to see clearly)
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043
Date: Wed, 19 Jan 2000 17:12:19 +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: Storm lid lifting around Sydney...
Sender: aussie-weather-approval at world.std.com
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I wrote at Wed, 19 Jan 2000 16:56:39 +1100
[snip]
> Another complex of cells exhibiting 40-100 just exploded
> NNE of Waterfall. This complex just went +100m at 0540UTC
> heading towards Kernel in a ENE direction. Watch out...
> might be hail...
Might be a feature of radar also...That's why we need
spotters. Took a real look at the Sydney Heads cell to
discover most of the dense precipitation was still in
the cloud...What the radar picked up lasted less than
20 mins. As for the case above, I can't see it from
where I am as the main structure is hidden but it is
still showing 40-100mm/hr in the area around the
Georges River through the Southern suburbs of Sydney
and Kernel. Spotters/chasers...where are you? Gotta go:-)
Michael Scollay mailto:michael.scollay at telstra.com.au
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044
From: "Willis, Andrew" [adwillis at bechtel.com]
To: "'Aussie Weather'" [aussie-weather at world.std.com]
Subject: aus-wx: Starting to Fire at Newcastle
Date: Tue, 18 Jan 2000 22:05:21 -0800
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Hi All
We have some lovely Cu starting to rise SW-W of Newcastle. One storm
started but died and left a nice orphan anvil. A cell further west looks
like it is making a better fist of things, an anvil is spreading out nicely
in a northerly direction.
S-SW, there is some interesting Cu but it is yet to get organised.
Andrew Willis
Desktop Support - Port Waratah Stage 3 Expansion
Eagles may soar but weasels don't get sucked into jet engines.
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045
From: "Willis, Andrew" [adwillis at bechtel.com]
To: "'Aussie Weather'" [aussie-weather at world.std.com]
Subject: aus-wx: And getting better...
Date: Tue, 18 Jan 2000 22:21:20 -0800
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Newcastle now has a belter of a storm to the NW. Multicell with a crisp
anvil coming off the top.
W, I can see the anvil of another storm. Can't see anything of the base
though.
SW, a third anvil is just starting to hove into view
Immediately South and SW, we have a few turkey towers.
Should be an interesting night.
Andrew Willis
Desktop Support - Port Waratah Stage 3 Expansion
Eagles may soar but weasels don't get sucked into jet engines.
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046
Date: Wed, 19 Jan 2000 17:37:41 +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: Storm lid lifting around Sydney...
Sender: aussie-weather-approval at world.std.com
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[snip]
I wrote at Wed, 19 Jan 2000 17:12:19 +1100:
> ...
> I can't see it from where I am as the main structure
> is hidden but it is still showing 40-100mm/hr in the
> area around the Georges River through the Southern
> suburbs of Sydney and Kernel. Spotters/chasers...
> where are you? Gotta go:-)
Main part of this storm went through the Maroubra area
E of the airport at 0600UTC (1700 AEST) but the southern
suburbs of Sydney got a decent drenching. Guess that the
Kernel doplar radar got a good look-see. Jeez, it got up
quick and moved quickly. At 1530, I was looking outside
discussing the situation with an interested colleague.
By 1615, there was very pretty Cu about. By 1656, it
was exploding. By 1715, it was nearly all over. Looks
as if the geography, humidity and heat of Sydney was
enough to set these storms off...Also caught the BoM
by surprise...given how quick it happened, there was
no chance. You needed a sounding at 1530/1600 to work
this one out in advance...signs were there in the few
clouds about from 1530...
Michael Scollay mailto:michael.scollay at telstra.com.au
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047
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Thunderstorm Activity!
Date: Wed, 19 Jan 2000 17:34:59 +1100
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Hi and welcome
On the weather 21 animated sat pic the large single storm you refer to
lasted some few hours, eventually fading well out in the Tasman sea.
Michael
> This is my first venture into this forum. I've noticed a lack of weather
> "news" coming from Tassie so I'd better change that! We had some
> Thunderstorm activity around last night. A cold front developed nicely as
it
> passed over the State. There wasn't enough activity to bother getting out
of
> bed though....I tried..but I just could get out...sad I know! :-) But if
> things had picked-up I would have made the effort! It has been quite mild
> and humid for Tassie standards over the past couple of weeks. Saturday
> afternoon a large single Cb cell grew very rapidly just North of the
Central
> Plateau and showed up nicely on the radar. Also picked up the lightning
> clicks from the storm on the radio to confirm it was a thunderstorm.
Things
> have been very dry down here, not what I was expecting during a La Nina
> situation.
>
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048
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Trough brings great cu to Canberra
Date: Wed, 19 Jan 2000 17:47:04 +1100
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Great to see that somebody else had the same sort of chase excitement I had
in the Illawarra. To add insult I had to watch a storm fully develop over
Sydney 90 km away.
Seems the Illawarra is in a rut this year with activity falling short one
day, then developing north of us the next. Although today there was nothing
much further south.
The change hit here around 4pm with a quite gusty SE at 30 knots, lots of
dust and some strato cumulus starting to form over the ocean. The southern
escarpment is already covered with a tablecloth of cloud.
Michael
> The trough has passed through Canberra in the last hour or so (ie around
1-2
> pm).
>
> Its features included some great fair weather cu - about 6 of them
developed and
> lasted for about 30 min or so. I chased for about 10 min and was rewarded
by
> some great vertical development - at one stage the base to top must have
> exceeded 10 metres!! Updrafts were shooting up at around 2cm/hr (sadly no
video
> shots).
>
> With the excitement over the sky has now gone back to clear and the wind
has
> gradually shifted to a westerly (was NNW ahead of the trough). Temp is
> holding up at around 34 with the DP now falling currently around 9 from a
> "high" of around 13 ahead of the trough)
>
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049
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Savage Monsoonal Storm
Date: Wed, 19 Jan 2000 17:37:17 +1100
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I don't know the full explanation, but have heard that a fluro tube will
light up in a powerstation switchyard under the 132 Kv stuff.
Michael
> I was wondering whether an experience I had is normal: I was doing some
> work in the basement at home back in Spain, where thunderstorms are much
> more common than here in Tassie, and it had been raining for several days
> previously, so the ground was quite saturated. We had a fabulous morning
> storm, and quite a few CGs so close that lightning and thunder were
> simultaneous (The house is atop a hill). Several of these caused the
> fluorescent tubes on the ceiling to light up for about a second
immediately
> after the lightning. I assume they hit very close to the house, but I had
> never heard of fluorescent lights lighting up... any explanations?
>
> Miguel de Salas
>
> School of Plant Science,
> University of Tasmania,
> PO Box 252-55, Sandy Bay, Hobart
> Tasmania, Australia, 7001.
>
> mailto://mm_de at postoffice.utas.edu.au
>
> My Moths Page:
> http://members.xoom.com/migueldes/moths/moths.html
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> -----------------------jacob at iinet.net.au------------------------------
>
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050
Date: Wed, 19 Jan 2000 17:38:34 +1000
From: Anthony Cornelius [cyclone at flatrate.net.au]
X-Mailer: Mozilla 4.6 [en] (Win98; I)
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To: Australian Weather Mailing List [aussie-weather at world.std.com]
Subject: aus-wx: Hail Reported By our Hunter Chasers!
Sender: aussie-weather-approval at world.std.com
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Hi all!
Just talking to Matt Smith and James Harris, they've just encountered
hail while driving through Singleton. They're under the southern (and
weaker intensity) edge of the storm. Hail commenced as pea sized and
increased to 5c size as I was talking to them.
They've encountered a nice microburst from this storm, and they saw
another storm to their NW which they believed to be a supercell.
I hope that this trough continues to perform very well in NSW - the
better it performs for NSW, the better it'll perform for SE QLD :-)
--
Anthony Cornelius
Queensland Coordinator of the Australian Severe Weather Association
(ASWA)
(07) 3390 4812
14 Kinsella St
Belmont, Brisbane
QLD, 4153
Please report severe thunderstorms on our Queensland severe thunderstorm
reporting line on (07) 3390 4218 or by going to our homepage at
http://www.severeweather.asn.au
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051
From: "Max King" [mnk at Dingoblue.net.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Hail Reported By our Hunter Chasers!
Date: Wed, 19 Jan 2000 19:00:36 +1100
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Hi People,
Just to let you know that the front passed thru Sydney around 5.30pm Local
time, and took any storms with it :(
It looked promising in the City from about 4pm, but at Circular Quay you
could've counted the rain drops on the fingers of one hand...............
Oh well, better luck next time.
Max
----- Original Message -----
From: Anthony Cornelius [cyclone at flatrate.net.au]
To: Australian Weather Mailing List [aussie-weather at world.std.com]
Sent: Wednesday, January 19, 2000 6:38 PM
Subject: aus-wx: Hail Reported By our Hunter Chasers!
> Hi all!
>
> Just talking to Matt Smith and James Harris, they've just encountered
> hail while driving through Singleton. They're under the southern (and
> weaker intensity) edge of the storm. Hail commenced as pea sized and
> increased to 5c size as I was talking to them.
>
> They've encountered a nice microburst from this storm, and they saw
> another storm to their NW which they believed to be a supercell.
>
> I hope that this trough continues to perform very well in NSW - the
> better it performs for NSW, the better it'll perform for SE QLD :-)
> --
> Anthony Cornelius
> Queensland Coordinator of the Australian Severe Weather Association
> (ASWA)
> (07) 3390 4812
> 14 Kinsella St
> Belmont, Brisbane
> QLD, 4153
> Please report severe thunderstorms on our Queensland severe thunderstorm
> reporting line on (07) 3390 4218 or by going to our homepage at
> http://www.severeweather.asn.au
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> -----------------------jacob at iinet.net.au------------------------------
>
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052
X-Sender: jra at upnaway.com
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Date: Wed, 19 Jan 2000 17:02:07 +0800
To: aussie-weather at world.std.com
From: Ira Fehlberg [jra at upnaway.com]
Subject: Re: aus-wx: ASWA Minor Flood Warning Northern NSW
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Correct me if im wrong but isnt the aussie-wx list completley seperate from
ASWA?? If so then would'nt any warning/thoughts posted to the list be just
that? I dont remember seeing any "official" words stating that Halden was
issuing a warning on behalf of ASWA. No where in his email did he state
such a thing at all and even if he did so what, he never issued it on
behalf of ASWA.............................The list was free speech, well
so I thought.......
Ira Fehlberg
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053
From: "Matthew Piper" [mjpiper at ozemail.com.au]
To: "Aussie Weather" [aussie-weather at world.std.com]
Subject: aus-wx: Summer at Last
Date: Wed, 19 Jan 2000 21:30:50 +1100
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Hi Everyone,
Today I finally had a taste of real summer
weather. Got to a maximum of 40.4 at 3:25pm here in Blaxland. A southerly change
at 7:10pm dropped the temperature by 6 degrees in a matter of 10 minutes. I
saw the storms around the city late this afternoon as I was leaving work and
agree with Michael Scollay that they looked far better on radar than visually.
They were very high based but grew extremely rapidly as the cold front neared
the city. Not a cloud in the sky now though. All the activity is long gone
unfortunately.
I have put todays temperature trace obtained with
my Davis Weather Station onto the net. Go here to see it http://www.ozemail.com.au/~mjpiper/weathergraph.jpg
Matthew Piper
054
Date: Wed, 19 Jan 2000 21:30:46 +1000
From: Susan Puddifer [susanpud at healey.com.au]
X-Mailer: Mozilla 4.05 (Macintosh; I; PPC)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Halden Boyd
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Susan From Balmain
I would just like to add my 2c worth on the current debate about should he
have or shouldn't he have. As a NON ASWA member and someone who is purely and
simply a aussie-wx list member, I agree entirely with what Ira has had to say.
If I chose to send a post claiming that Sydney would be having the worst
season of winter thunderstorms ever in the history of white settlement this
year, would the BOM issue a warning on the strength of that? If the
prognostications proved correct, so what? It would have been seen as
precisely what it was - a lucky guess. If the prognostications proved false,
who would even remember the warnings? I don't think many people and
especially the BOM, would see the many prognostications EVERYONE on this list
has been guilty of as official warnings. Now you could argue that Halden is
coming from a position of strength - being in the media and having a known
background in weather, but once again we have to remember that most of the
people on this list are gifted amateurs. And once again we have to remember
that even if Haldon did broadcast a message to the list about flood warnings
etc. who is going to see that warning? No one except other members of what is
in reality a group of people interested in weather.
I would also like to add that as a north coast born and raised person forced
to live in Sydney - Halden has been a voice I have listened to via the medium
of radio for a long time, including on my many visits back home. I will miss
his reports on the weather happenings on the north coast
Ira Fehlberg wrote:
> Correct me if im wrong but isnt the aussie-wx list completley seperate from
> ASWA?? If so then would'nt any warning/thoughts posted to the list be just
> that? I dont remember seeing any "official" words stating that Halden was
> issuing a warning on behalf of ASWA. No where in his email did he state
> such a thing at all and even if he did so what, he never issued it on
> behalf of ASWA.............................The list was free speech, well
> so I thought.......
>
> Ira Fehlberg
>
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> -----------------------jacob at iinet.net.au------------------------------
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055
Date: Wed, 19 Jan 2000 21:59:16 +1000
From: Andrew Puddifer [andypudd at backmeup.net.au]
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To: aussie-weather at world.std.com
Subject: Re: aus-wx: Pulling out of aswx
Sender: aussie-weather-approval at world.std.com
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Halden,
I have really been noticing the bullshit(someone had to say it!) too......I thought this list was AUSSIE
weather.....and I do think you have been persecuted.....
I think a lot of people on this list should grow up a bit....I did not take Halden's email regarding the flooding to be
official in any way..and if anyone did.....they must not be able to read too well!
Also, I thought this was Aussie weather, not Northern Europe weather, New Zealand weather or whatever....
My two cents.....
Andrew.
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056
Date: Wed, 19 Jan 2000 21:22:09 +1000
From: Don White [donwhite at ozemail.com.au]
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Subject: Re: aus-wx: One of my pet hates...
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Blair.... tell the ABC - that's what BoM should be doing when they
notice this mis information.
However, being at the SCG today it felt like ... no not 100% but close.
Don White
Blair Trewin wrote:
>
> ...is cricket commentators exaggerating the humidity and/or heat
> at games.
>
> I've just witnessed Jim Maxwell claiming that the humidity at the SCG
> was 'near 100%'. For the record, the current conditions at the sites
> closest to the SCG are:
>
> Observatory Hill Temp 29.8, RH 58%
> Sydney Airport Temp 34.2, RH 41%
>
> Dewpoints around 20, certainly high, but 30 degrees and 100% requires
> a dewpoint of 30, and that is rare anywhere in the world; near the
> Persian Gulf and Red Sea and that's about it.
>
> (I've also seen claims of 45 degrees at Madras during the 1986 Tied
> Test; 35 degrees and 60-70% humidity would be more like it, still
> highly unpleasant!)
>
> Blair Trewin
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057
From: "Jane ONeill" [cadence at rubix.net.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Aussie weather list
Date: Wed, 19 Jan 2000 22:41:05 +1100
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Dear all,
The things that I really enjoy about the aussie-weather list are the facts
that it has created a forum for people to be able to discuss *any* aspects
of weather, to follow their passion & to learn from each other, & to form
friendships which will last for many, many years both on & off the list.
Weather is weather & this is what we all have in common.........an
absolutely endless passion for one or more aspects of weather for one reason
or another, whether it be photography, atmospheric physics, electricity,
history, statistics etc etc etc .......some aspect(s) of this science turns
each and everyone of us on - which I guess is why we're all here today and
why this list will outlast the lot of us. I thank you all for your
continuing friendship, help & education.
My opinion........
Jane ONeill
ASWA Co-ordinator - Victoria
Email: cadence at rubix.net.au
Melbourne Storm Chasers http://www.rubix.net.au/~cadence
Australian Severe Weather Assocn (ASWA Inc.)
http://www.severeweather.asn.au
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-----------------------jacob at iinet.net.au------------------------------
058
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Date: Wed, 19 Jan 2000 22:38:15 +1100
Subject: Re: aus-wx: One of my pet hates...
From: "Mark Hardy" [mhardy at magna.com.au]
To: aussie-weather at world.std.com
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Perhaps if humidity was reported to the media as dewpoint instead of RH then
the more ridiculous reports/estimates would be reduced. After all it's very
easy to quote a RH of 99% and not be disputed. However, once the general
public understand the numbers, to quote a dewpoint of 34°C would be to risk
ridicule.
Mark Hardy, TWC
----------
>From: Don White
>To: aussie-weather at world.std.com
>Subject: Re: aus-wx: One of my pet hates...
>Date: Wed, 19 Jan 2000 22:22
>
> Blair.... tell the ABC - that's what BoM should be doing when they
> notice this mis information.
> However, being at the SCG today it felt like ... no not 100% but close.
> Don White
>
> Blair Trewin wrote:
>>
>> ...is cricket commentators exaggerating the humidity and/or heat
>> at games.
>>
>> I've just witnessed Jim Maxwell claiming that the humidity at the SCG
>> was 'near 100%'. For the record, the current conditions at the sites
>> closest to the SCG are:
>>
>> Observatory Hill Temp 29.8, RH 58%
>> Sydney Airport Temp 34.2, RH 41%
>>
>> Dewpoints around 20, certainly high, but 30 degrees and 100% requires
>> a dewpoint of 30, and that is rare anywhere in the world; near the
>> Persian Gulf and Red Sea and that's about it.
>>
>> (I've also seen claims of 45 degrees at Madras during the 1986 Tied
>> Test; 35 degrees and 60-70% humidity would be more like it, still
>> highly unpleasant!)
>>
>> Blair Trewin
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>> -----------------------jacob at iinet.net.au------------------------------
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> -----------------------jacob at iinet.net.au------------------------------
>
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-----------------------jacob at iinet.net.au------------------------------
059
Date: Wed, 19 Jan 2000 22:52:46 +1000
From: Andrew Puddifer [andypudd at backmeup.net.au]
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To: aussie-weather at world.std.com
Subject: Re: aus-wx: One of my pet hates...
Sender: aussie-weather-approval at world.std.com
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The cricket thing is simple....bring back the old Weatherwall!
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-----------------------jacob at iinet.net.au------------------------------
| Document: 000119.htm
Updated: 30 January 2000 |
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