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Storm News
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Australian Weather Mailing List Archives: Wednesday, 14 April 1999 |
From Subject
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001 John Woodbridge [jrw at pixelcom.net] Brisbane totals & still freezing
002 John Woodbridge [jrw at pixelcom.net] RE: cold air tornadoes
003 John Woodbridge [jrw at pixelcom.net] Brisbane Airport
004 "James Chambers" [jamestorm at ozemail.com.au] Brisbane Airport brrrr
005 Michael Fewings [mike at strikeone.com.au] Snow
006 Norman Lynagh [lynagh at dial.pipex.com] RE: cold air tornadoes
007 Jacob [jacob at iinet.net.au] Hottest start to April in Perth for 21 years
008 Anthony Cornelius [cyclone at stealth.com.au] Incoherrent radar observations vs rainfall totals.
009 Anthony Cornelius [cyclone at stealth.com.au] Brisbane Airport
010 "Terry Bishop" [dymprog at mpx.com.au] Orange Weather
011 Lindsay [writer at lisp.com.au] Bring on the cold weather...
012 Lindsay [writer at lisp.com.au] Brisbane Totals + Brisbane Froze O'night
013 Paul_Mossman at agd.nsw.gov.au Incoherent radar observations vs rainfall totals.
014 Blair Trewin [blair at met.Unimelb.EDU.AU] Brisbane Totals + Brisbane Froze O'night
015 Blair Trewin [blair at met.Unimelb.EDU.AU] Brisbane Airport brrrr
016 Michael_Bath at amp.com.au Incoherent radar observations vs rainfall totals.
017 John Woodbridge [jrw at pixelcom.net] Hottest start to April in Perth for 21 years
018 Paul_Mossman at agd.nsw.gov.au Incoherent radar observations vs rainfall totals.
019 John Woodbridge [jrw at pixelcom.net] Incoherent radar observations vs rainfall totals.
020 Blair Trewin [blair at met.Unimelb.EDU.AU] Hottest start to April in Perth for 21 years
021 Paul_Mossman at agd.nsw.gov.au Incoherent radar observations vs rainfall totals.
022 steve baynham [bayns at nor.com.au] Incoherent radar observations vs rainfall totals.
023 Chris Maunder [cmaunder at dynamite.com.au] Brisbane Totals + Brisbane Froze O'night
024 Blair Trewin [blair at met.Unimelb.EDU.AU] Perth Airport has highest April min on record
025 "Jane ONeill" [cadence at rubix.net.au] Incoherent radar observations vs rainfall totals.
026 Jacob [jacob at iinet.net.au] Perth Airport has highest April min on record
027 Blair Trewin [blair at met.Unimelb.EDU.AU] Question for Blair - Comboyne Rain Figures
028 Paul_Mossman at agd.nsw.gov.au Question for Blair - Comboyne Rain Figures
029 Bodie_27 at postmaster.co.uk RE: cold air tornadoes
030 Bodie_27 at postmaster.co.uk Feb Totals
031 Bodie_27 at postmaster.co.uk Brisbane Extremes
032 Don White [donwhite at ozemail.com.au] Question for Blair - Comboyne Rain Figures
033 Don White [donwhite at ozemail.com.au] Question for Blair - Comboyne Rain Figures
034 Paul_Mossman at agd.nsw.gov.au Question for Blair - Comboyne Rain Figures
035 Bodie_27 at postmaster.co.uk SE QLD wx
036 "Michael Thompson" [michaelt at ozemail.com.au] Storm in Illawarra ( 5.30pm )
037 Bodie_27 at postmaster.co.uk Maclean - Yamba Supercell
038 Paul_Mossman at agd.nsw.gov.au Maclean - Yamba Supercell
039 "Michael Thompson" [michaelt at ozemail.com.au] Illawarra Storm Update
040 Jimmy Deguara [jimmyd at ozemail.com.au] Illawarra Storm Update
041 "Keith" [kevans at kisser.net.au] TC Vance
042 "Matthew Piper" [mjpiper at ozemail.com.au] Lightning Visible from Blue Mtns
043 "James Chambers" [jamestorm at ozemail.com.au] Re: Redcliffe tornadic supercell 24/12/89
044 Anthony Cornelius [cyclone at stealth.com.au] Incoherent radar observations vs rainfall totals.
045 "Michael Thompson" [michaelt at ozemail.com.au] Strom likely to hit Cronulla / Kurnell
046 "Jane ONeill" [cadence at rubix.net.au] Lapse Rates
047 Chris Maunder [cmaunder at dynamite.com.au] Lightning Visible from Blue Mtns
048 "Michael Thompson" [michaelt at ozemail.com.au] Fw: help!
049 "Kevin Phyland" [kjphyland at hotmail.com] Incoherent radar observations vs rainfall totals.
050 "Kevin Phyland" [kjphyland at hotmail.com] Incoherent radar observations vs rainfall totals.
051 "Kevin Phyland" [kjphyland at hotmail.com] Incoherent radar observations vs rainfall totals.
052 "Kevin Phyland" [kjphyland at hotmail.com] Incoherent radar observations vs rainfall totals.
053 Michael Bath [mbath at ozemail.com.au] sydney lightning
054 "Michael Thompson" [michaelt at ozemail.com.au] Pictures of Illawarra Storm - some lowerings
055 Michael Bath [mbath at ozemail.com.au] Pictures of Illawarra Storm - some lowerings
056 "Michael Thompson" [michaelt at ozemail.com.au] Hail in Sydney
057 Matt Smith [disarm at braenet.com.au] 2nd storm!!!
058 "Michael Thompson" [michaelt at ozemail.com.au] Pictures of Illawarra Storm - some lowerings
059 Michael Cross [wizard at terrigal.net.au] Pictures of Illawarra Storm - some lowerings
060 Michael Bath [mbath at ozemail.com.au] Sydney Hailstorm
061 "Michael Thompson" [michaelt at ozemail.com.au] Pictures of Illawarra Storm - some lowerings
062 "Michael Thompson" [michaelt at ozemail.com.au] Hail damage in Sydney
063 Matt Smith [disarm at braenet.com.au] Hail damage in Sydney
064 Michael Bath [mbath at ozemail.com.au] first Sydney warning!
065 "Keith" [kevans at kisser.net.au] Link to au.austnet.org #Weather via Web brouser
066 "Michael Thompson" [michaelt at ozemail.com.au] first Sydney warning!
067 Dane Newman [dpn at bigpond.com] Sydney Hailstorm
068 Bodie_27 at postmaster.co.uk Lapse Rates
069 "Michael Thompson" [michaelt at ozemail.com.au] Sydney Hailstorm
070 Bodie_27 at postmaster.co.uk Sydney Hailstorm
071 DavidC at thevortex.com RE:Sydney storm
072 "Michael Thompson" [michaelt at ozemail.com.au] Channel 7 grills BOM
073 "Michael Thompson" [michaelt at ozemail.com.au] RE:Sydney storm
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001
From: John Woodbridge [jrw at pixelcom.net]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: RE: aus-wx: Brisbane totals & still freezing
Date: Wed, 14 Apr 1999 01:11:06 +1000
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Hi all,
In reference to one of my previous emails saying that I think it's colder
this year... Here are some facts from my recordings for the first 13 days
of April this year compared to the first 13 days of April last year.
1998: Average Max: 31.0 Average Min: 19.9
1999: Average Max: 25.1 Average Min: 16.8
Differance: Av Max: -5.9 Av Min: -3.1
Very distinctly colder! Got down to 13 last night at Mt. Crosby (10C at
Ipswich according to Ch 9 news), and didn't get this cold last year until
May 22 and that was with a Westerly blowing. Further, on April 14 last
year I recorded a very warm overnight min of 24.5, and on April 23 another
warm min of 23.5. I wonder if this lends more credence to last year being
warmer than usual or this year being colder??
We are in for another cool night here, temp was dropping rapidly through 17
at midnight. Air stream still SE but is now calm & clear.
John W.
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002
From: John Woodbridge [jrw at pixelcom.net]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: RE: aus-wx: RE: cold air tornadoes
Date: Wed, 14 Apr 1999 00:43:08 +1000
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Hi David,
One of my weather books makes mention of a tornado in Utah 1970, which
turned white when it crossed a snowfield. I guess that would definitely
have been coldie he he. But it goes to show you don't necessarily need
summertime temps & humidity to create the requisit conditions for a Tornado
- just sufficient instability.
John.
-----Original Message-----
From: DavidC at thevortex.com [SMTP:DavidC at thevortex.com]
Sent: Tuesday, 13 April 1999 19:46
To: aussie-weather at world.std.com
Subject: aus-wx: RE: cold air tornadoes
>Ben from Brisbane wrote.
>
>Just wondering about something.. The BOM up here dubbed the Eumundi
Tornado
>(not sure of the date, but a month or so ago now) a "cold air tornado"..
>Can anyone give a definition of what they think a cold air tornado is?
Hey Ben,
I remember having a conversation Paul
(Graham) on cold 'season' tornadoes and he
sent me a BoM webpage on them:
http://www.bom.gov.au/bmrc/regn/expt/
tornado/WA/coldies_wa.htm
I remember a BoM page with a lot more
detail than the above but couldn't find it.
Other than cold season tornadoes the only
other 'cold' type I've heard of are cold
air funnels (they only rarely touchdown).
Your description of cold air tornado
formation is pretty close to what I have
read on these. They occur usually well
behind a cold front or trough in a
generally stable atmosphere: often there is
layer of more buoyant humid air beneath dry
air. I think some of the waterspouts which
have been observed of the east coast behind
a front are also thought to be cold cored.
David
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003
From: John Woodbridge [jrw at pixelcom.net]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: RE: aus-wx: Brisbane Airport
Date: Wed, 14 Apr 1999 01:17:20 +1000
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Hi Greg,
That could indeed explain a discontinuity, but you are saying that it is
now much closer to the bay, so I would have expected warmer mins, not
colder ones as Blair has observed. I wonder what is going on...
John W.
-----Original Message-----
From: Greg CURTIS [SMTP:curtisg at ecn.net.au]
Sent: Wednesday, 14 April 1999 6:24
To: aussie-weather at world.std.com
Subject: aus-wx: Brisbane Airport
The new Brisbane Airport opened in 1988 and from memory some of the new
facilities were opened earlier than that.
The old Met site was close to where the Gateway Arterial is now in the
vicinity of Webster Ave Hendra. The new site is on Lomandra Drive about
3.5 ks to the east probably the reason for differences.
Greg Curtis
Bardon
Brisbane
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004
From: "James Chambers" [jamestorm at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Brisbane Airport brrrr
Date: Wed, 14 Apr 1999 01:27:25 +1000
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Hi all
I remember a morning in winter 1994/1995 where the Brisbane minima got down
to 3 degrees but Amberley's (Ipswich) got down to -5 degrees! I think this
is a record low temp for Amberley. I'm in the suburbs and I recorded -1
degrees on an old thermometer (by waking up at 5.30 and reading it!
brrrrrr!!!!). It just goes to show what an observation centre close to the
water will do to minimum temperatures. Mind you, the obs in Amberley are in
a valley, or lower area.
Does anyone know the exact time and temps (to decimal point) ? I'm very
sure it was a record low temp at Amberley.
Cheers!!!!
>The new Brisbane Airport opened in 1988 and from memory some of the new
>facilities were opened earlier than that.
>
>The old Met site was close to where the Gateway Arterial is now in the
>vicinity of Webster Ave Hendra. The new site is on Lomandra Drive about
>3.5 ks to the east probably the reason for differences.
>
>Greg Curtis
>Bardon
>Brisbane
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> -----------------------jacob at iinet.net.au------------------------------
>
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005
Date: Wed, 14 Apr 1999 00:11:41 +0800
From: Michael Fewings [mike at strikeone.com.au]
Organization: Strike One Lightning Photos
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To: Aussie Weather [aussie-weather at world.std.com]
Subject: aus-wx: Snow
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Hi all,
Jason from Karratha pointed this out in IRC
Its a report from Kuri Bay
! NTH
KIMBERLEY
!
!----------------------------------------------------------------------!
! Kalumburu !3 ENE
24 35 36 !
! Kuri Bay !5 SW 28 SNOW SHOWERS 28
33 5 !
! Mt Elizabeth !4 E
4 32 32
!
! Wyndham !0 ESE
9 35 36
!
Its not Christmas yet is it?
--
Michael Fewings
Strike One Lightning Photos
http://strikeone.com.au
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006
Date: Tue, 13 Apr 1999 16:54:52 +0100
To: aussie-weather at world.std.com
From: Norman Lynagh [lynagh at dial.pipex.com]
Subject: Re: aus-wx: RE: cold air tornadoes
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In message <01BE8613.BAD42B00.jrw at pixelcom.net>, John Woodbridge
writes
>Hi David,
>
>One of my weather books makes mention of a tornado in Utah 1970, which
>turned white when it crossed a snowfield. I guess that would definitely
>have been coldie he he. But it goes to show you don't necessarily need
>summertime temps & humidity to create the requisit conditions for a Tornado
>- just sufficient instability.
>
>John.
Many of the UK tornados occur during winter time with surface air temps
well below 10c. As you say, all it requires is sufficient instability
and the right upper wind configuration.
Norman.
=====================================================================
Norman Lynagh Weather Consultancy Tel: +44 (0)1494 870220
18 Kings Road Fax: +44 (0)1494 870221
Chalfont St. Giles E-mail: lynagh at dial.pipex.com
Buckinghamshire HP8 4HS
England
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007
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Date: Wed, 14 Apr 1999 01:08:10 +0800
To: aussie-weather at world.std.com
From: Jacob [jacob at iinet.net.au]
Subject: aus-wx: Hottest start to April in Perth for 21 years
Sender: aussie-weather-approval at world.std.com
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It was said on the news tonight that this is the hottest start to April in
Perth for 21 years. Currently the average is 29C, which is 4C above the
long term average.
We've had 5 days above 32C, with another 1 expected later today, and we
should be in the 30s for the rest of the week.
Currently its 1am, and its still 25.5C
PERTH AND METROPOLITAN:
The chance of thunderstorm in the afternoon and evening.
E/NE winds, fresh in the morning.
UV INDEX: 07 (Very High)
FIRE DANGER: Coastal Plain: High.
Hills: High.
FORECAST TEMPERATURES:
MIN: 20 MAX: 32
HEADLINE: Afternoon thunderstorm.
THE OVERNIGHT MINIMUM WAS 20.4 AT 06:20 HOURS
TODAY'S MAXIMUM WAS 33.6 AT 15:15 HOURS
OUTLOOKS FOR PERTH FOR:
THURSDAY: Fine. Max 32
FRIDAY : Fine. Max 31
SATURDAY: Few showers developing Max 25
Jacob
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008
Date: Tue, 13 Apr 1999 21:30:54 +1000
From: Anthony Cornelius [cyclone at stealth.com.au]
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To: Australian Weather Mailing List [aussie-weather at world.std.com]
Subject: aus-wx: Incoherrent radar observations vs rainfall totals.
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Hi all,
Ok - I'm going to try and attempt to give a better answer to Ben's
question about colours on radar then I did before. I did a little
research in the university library, and I found out some fairly
interesting information, that I'm going to put forth here some opinions
and idea's, I'd especially like it if some of our physicists here could
comment :) Please note that there is a lot of concepts I still do not
understand, and I've had to read over some of the information several
times - for this reason, I've tried to make it "simpler" for all to
understand by using basic English! (ie, my own words) and not because I
do not believe people won't be able to understand the technical jargon,
but rather because I'm sure many of you here do not want to be sitting
here reading over this email 2-3 times to try and understand what I'm
saying!
Essentially, the question (how I personally interpreted it was) why does
some areas under (for example) yellow intensity on one day, receive much
more higher totals then another area on a completely different day (with
different atmospheric conditions) which still showed a very similar
radar reflectivity pattern.
There are a plethora of variables that need to be taken into account,
one of these was already brought up previously. That is wind speed,
strong, squally winds often have a dramatic effect on the total of
rainfall, as the rain gauge no long becomes a proper representative area
(ie, it is now possibly too small to give an accurate measure of
rainfall). Certainly, this could explain some instances, but have been
a host of incidences that I know of where winds have only been generally
light at the surface.
Before we can continue, it is critical to note that only rain events and
coastal showers will be used as examples (because these are the events
that appear to be where radar 'underestimates.') Again, another
important factor is the fact that 90-95% of coastal showers are intense,
small droplets of rain. Thunderstorms, on the other hand generally have
very large drops of rain (however there can be, and are at times
exceptions to this.) Thunderstorms also tend to appear on radar, fairly
representative of the actual rainfall received, coastal showers and rain
events however do not. I have personally been in coastal showers that
have had 100mm+/hr rainfall rates and have not shown well on radar (even
what appears to be fairly widespread rates).
Given this above information, lets look into how radar works. Radar
works on a method of reflectivity, that is, it shoots a microwave beam
out into the sky, and then measures the amount of reflectivity that is
received, and thus corresponds to the different intensities of radar.
So if no reflectivity is received, the radar/computer will read this as
no precipitation. However, during this process of reflectivity, there
are a myriad of variables that could possibly alter both the path of the
microwaves to the precipitation and back to the radar dish. There are
two main variables, the scattering of the radar beam by the droplets of
rain, and the absorption of the radar beam by the rain droplets. The
sum of both of these variables is referred to as the "attenuation." The
attenuation is effected greatly by the intensity of rainfall, the
greater the rainfall, the greater the attenuation. This is because the
higher the intensity of rainfall, the larger the volume of water is, the
more microwave energy is absorbed. This is the same for the scattering,
however it could be slightly different. This is where my limited area
of physics knowledge comes in, I cannot understand the equations given
to explain some of the processes. So I'll be deducting a few hypotheses
and making a few assumptions from here on. The scattering of microwave
energy, is somewhat proportional to the volume of water precipitating.
However, from what I could interpret from the information given, that
this is also affected by the frequency of the drops, and the size of the
drops. So here's a theory, that the scattering of microwave energy is
proportional to the frequency of raindrops, and the size of raindrops.
However, the frequency of rain drops would have the greater influence of
the scattering, and thus the attenuation of a radar beam. The reason
for this is because although a large raindrop, would 'catch' more
radiation, a radar beam would not pass through many large raindrops, and
thus the overall scattering effect would be reduced. However, with many
small raindrops, the scattering effect would be magnified by many times
as the radar beam would hit many more raindrops, each giving a degree of
scattering. Lets assign some theoretical values for the scattering of
radar beams, by raindrops (we'll ignore the absorption of the radar beam
for the time being for ease of understanding.) Lets say that after
passing through one, small raindrop, a beam loses 0.0001% of it's
energy. As it passes through rain, it hits many of these raindrops,
lets say 20 raindrops per meter x centimeter (again, another theoretical
value) That is now 20,000 raindrops per kilometer For that kilometer,
it has now lost 2% of it's total energy, for the next kilometer, it'll
lose another 2% (ok, it won't lose 2%, because there's only 98% energy
left, so it'll lose about ~1.96%, however for this example, 2% is close
enough). A similar example could be used for less frequent, larger
drops, however it won't hit as many larger drops, and thus, would could
say that the scattering would be less (even though the drops are
larger). Do you understand what I am saying here? That perhaps, the
small drops are so intense and frequent, that the scattering of the
radar beam is amplified many many times. And remember this, that not
only does the radar beam have to pass through the precipitation, but any
reflection has to additionally pass through any precipitation it had
just passed through, and will get scattered once again!
I have figures for theoretical values of the attenuation, if we use 10cm
waves for our radar, and have a rainfall intensity of 16mm/hr there'll
be a 0.01db/km loss (db is just another way of measuring rainfall from
radar, it works on a logarithmic scale, and if you're wondering, yes the
graph does compensate for the logarithmic scale). This is just one way,
so if radar passes through 100km of precipitation (ie a rain event) you
can expect to lose (0.01 X 100) X 2 = 2db of radar beam just due to the
attenuation. These, however, are theoretical values, and take into
account the average rain drop size/intensity, when clearly, this is
often not the case.
After all this, I am therefore proposing, that the small, intense
droplets of rain, actually scatter the radar beam more then thought.
Radar, should have built into it, a calculation that helps deal with the
attenuation, however it cannot be feasibly changed for each rain event ,
and may in fact be programmed to most accurately calculate the major
situations (ie thunderstorms).
As a general rule, there are two types of precipitation that occur
during coastal showers, the small intense drops (as mentioned before,
these are the most frequent) and the larger, less intense drops (much
less frequent). At times, there can be large, intense drops (ie the
110mm of rain that fell in two hours earlier this year from a very heavy
'shower.' Yet radar showed a general 10-20mm/hr with some 20-40mm/hr in
the area - a far cry from the 55mm/hr expected! So what happened here?
Well, as I just mentioned, the frequency of the drops and the size of
the drops effect how rain drops are scattered. However, we also have to
remember that this type of rainfall is analogous to storm rainfall (the
large, intense drops of rain). This certainly complicated this for me,
and literally 'blew' my theory apart. Especially since the heavy
coastal showers are often about the same size of a thunderstorm. So I'm
going to introduce another concept, one that I'm not too familiar with,
so again, please bear with me! While talking to Jeff Callaghan (head of
severe wx in QLD) he mentioned that some radar situations, do not show
up particularly well on radar. Particularly, coastal squall line
situations. The reason being the "salt nuclei" in the air, apparently
this absorbs a lot of the radiation(?) If we go back to what I was
saying and look at the keyword "coastal" in "coastal showers" one could
certainly assume that the salt nuclei concentration would have to be
fairly high (especially with an onshore wind) and could quite possibly
absorb some of the microwave energy from the radar beam.
Please note, that this is all just my deduction, and it's not all coming
from written material, so don't take it as the actual truth. Because
it's only my interpretation/opinions to try and answer, what I believe
is, a very interesting question.
Well, I certainly believe that I have put in my 2c in this subject,
anyone else care to do the same?
Anthony Cornelius
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009
Date: Wed, 14 Apr 1999 08:17:48 +1000
From: Anthony Cornelius [cyclone at stealth.com.au]
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Subject: Re: aus-wx: Brisbane Airport
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Hi Greg and all,
You just reminded me of something! When I did work experience with the
BoM, I spent half a day at the observation site (saw a balloon go up,
yay!!!) and we were talking about observations...he told me that the
current site isn't very good - at that rather, they'd be much suitably
located on the other side of the airport! I cannot remember why
though...I'm trying to remember the topography of the airport...(not
having much luck though) anyone care toput forth a possible reason?
Anthony Cornelius
Greg CURTIS wrote:
>
> The new Brisbane Airport opened in 1988 and from memory some of the new
> facilities were opened earlier than that.
>
> The old Met site was close to where the Gateway Arterial is now in the
> vicinity of Webster Ave Hendra. The new site is on Lomandra Drive about
> 3.5 ks to the east probably the reason for differences.
>
> Greg Curtis
> Bardon
> Brisbane
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010
From: "Terry Bishop" [dymprog at mpx.com.au]
To: "Aussie-weather" [aussie-weather at world.std.com]
Subject: aus-wx: Orange Weather
Date: Wed, 14 Apr 1999 08:27:04 +1000
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Hi All,
Yet another fine day in Orange. No cloud at all. Afternoon storms are
forecast.
At 08.25, 8C, 80%, 1022, WSW 0-5 Knots.
Terry.
mailto:dymprog at mpx.com.au
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011
Date: Tue, 13 Apr 1999 14:04:30 -0700
From: Lindsay [writer at lisp.com.au]
X-Mailer: Mozilla 3.0 (Win16; I)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Bring on the cold weather...
Sender: aussie-weather-approval at world.std.com
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Yes, it's all relative. You can have glorious autumn sunny says up here
in the upper blue mountains, say 12-14 degrees and people are out in
shorts etc whereas that would be knee knocking weather in many places.
I've been to Lithgow in september when its barely reaching ten degrees
and folk are prancing about in shorts and tee's. You do acclimatise but
I think it also has to do with the strength of the sun at altitude too.
It definately feels warmer on a sunny day of 10 degrees up here than say
sydney, that is, if the wind isn't blowing.
Lindsay Pearce
Marty wrote:
>
> Rosco,
>
> Well I'm a Victorian originally so I must say I don't mind what true
> Brisbanites classify as "cold" weather. It's lovely just to get home at 10
> or 11pm and not have to open up everything and leave it open till I go to
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012
Date: Tue, 13 Apr 1999 13:52:11 -0700
From: Lindsay [writer at lisp.com.au]
X-Mailer: Mozilla 3.0 (Win16; I)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Brisbane Totals + Brisbane Froze O'night
Sender: aussie-weather-approval at world.std.com
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Interesting Anthony,
I have relly's in brisbane and they have had colder temps than the
Brisban airport readings.
Curiously, whilst my town is around 1100 metres altitude and almost
always has winter days of 2 to -2 we don't often get colder than that.
Colder air sinks into the valleys I guess. i think the air record low is
around -9 in Katoomba so maybe -10 here. Still, we can have days where
it hovers around Zero all day, not to mention that lovely white stuff
that falls now nd then.
Lindsay.
Anthony Cornelius wrote:
>
> Hi John,
>
> I certainly have to agree with you here, the Brisbane airport really
> does not give an actual representation of the min/max, I can say now
> with 100% certainty, that if the site was just 10km further inland,
> Brisbane would have recorded subzero temps (was it 97 that people were
> phoning in with grass temps of -6 at Straphpine?? Even though this is
> grass, 1.5m up will still be negative - there were many -3's to -5's
> too...Brisbane AP recorded a temp less then 1C? I think...I cannot
> remember exactly, and the same with the date - I'm not good with dates +
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013
From: Paul_Mossman at agd.nsw.gov.au
X-Lotus-Fromdomain: NSW_AG
To: aussie-weather at world.std.com
Date: Fri, 16 Apr 1999 20:17:59 +1000
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Sender: aussie-weather-approval at world.std.com
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Great reading Anthony. well done.
Also topography plays a vital part in radar degradation too. This aspect
cannot be discounted.
One point: Where exactly (as in altitude) does the signal measure rain
intensity? This would also be interesting as (as well all know) smaller
concentrations of rain droplets are in the higher levels of normal rain
clouds, growing in density as they fall to the ground (such as the process
known as coalescence). This would be vital in places like Taree, nestled in
a valley of some sorts, where the radar "beam" cannot penetrate cause of
topography. Thus the radar loop shows say 10 -20mm per hour at the altitude
it is reflecting off, but closer to ground level water drops are much
larger and concentrated due to gravity, coalescence etc... and may be in
higher intensity scales.
Paul from Port.
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014
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: Brisbane Totals + Brisbane Froze O'night
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 11:08:54 +1000 (EST)
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>
> Interesting Anthony,
>
> I have relly's in brisbane and they have had colder temps than the
> Brisban airport readings.
>
> Curiously, whilst my town is around 1100 metres altitude and almost
> always has winter days of 2 to -2 we don't often get colder than that.
> Colder air sinks into the valleys I guess. i think the air record low is
> around -9 in Katoomba so maybe -10 here. Still, we can have days where
> it hovers around Zero all day, not to mention that lovely white stuff
> that falls now nd then.
The -8.2 at Katoomba is a highly suspect observation; a more probable
record low is -5.6. (On the day when Katoomba supposedly reached -8.2
no other station in the region was much below 0). Katoomba is a warm
site (relatively speaking) for minimum temperature, probably because
of its position on top of the range. (While I'm not familiar with
the actual site, I'm also aware that Simon Torok, when he was doing
his study of the quality of long-term Australian temperature records,
gave Katoomba a rating of 5, the worst possible; I'm not sure why).
Blair Trewin
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015
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: Brisbane Airport brrrr
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 11:13:59 +1000 (EST)
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Records for Brisbane Airport and Amberley:
Brisbane AP
High 39.6 7/12/1981 (definitely 1981; the Regional Office
had its December record high, 41.2, on the same day)
Low 0.6 27/6/1971, 1/8/1994
Amberley
High 44.3 6/1/1994
Low -4.9 8/8/1995
Blair Trewin
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016
From: Michael_Bath at amp.com.au
X-Lotus-Fromdomain: AMP at NET
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 11:18:34 +1000
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Sender: aussie-weather-approval at world.std.com
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The radar beam is angled at a couple of degrees from the horizontal (don't
know exact figure), so the further the location from the radar, the higher
in the sky it will actual 'see'. For places like Port Macquarie a few
hundred kilometres away from any radar sites, the radar would be pointing
at the sky several kilometres above ground. It would not pick up low cloud
rainfall at all and may only register the tops of storms or thick rain
bands.
regards,
Michael Bath
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017
From: John Woodbridge [jrw at pixelcom.net]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: RE: aus-wx: Hottest start to April in Perth for 21 years
Date: Wed, 14 Apr 1999 11:16:46 +1000
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Hi Jacob,
I have noticed that Perth's temps have stayed well up - something to do
with the ongoing High's in the bight no doubt. As you may have read, we
have been rather colder than what I would think to be normal. Often
Brisbane weather seems to be the opposite of Perth, due again to the action
of the weather pattern. For Perth to get the hot N'Easter, there has to be
a high in the bight, which means we are usually getting South/SE often
originating from way down near the bottom of New Zealand.
John W.
-----Original Message-----
From: Jacob [SMTP:jacob at iinet.net.au]
Sent: Wednesday, 14 April 1999 3:08
To: aussie-weather at world.std.com
Subject: aus-wx: Hottest start to April in Perth for 21 years
It was said on the news tonight that this is the hottest start to April in
Perth for 21 years. Currently the average is 29C, which is 4C above the
long term average.
We've had 5 days above 32C, with another 1 expected later today, and we
should be in the 30s for the rest of the week.
Currently its 1am, and its still 25.5C
PERTH AND METROPOLITAN:
The chance of thunderstorm in the afternoon and evening.
E/NE winds, fresh in the morning.
UV INDEX: 07 (Very High)
FIRE DANGER: Coastal Plain: High.
Hills: High.
FORECAST TEMPERATURES:
MIN: 20 MAX: 32
HEADLINE: Afternoon thunderstorm.
THE OVERNIGHT MINIMUM WAS 20.4 AT 06:20 HOURS
TODAY'S MAXIMUM WAS 33.6 AT 15:15 HOURS
OUTLOOKS FOR PERTH FOR:
THURSDAY: Fine. Max 32
FRIDAY : Fine. Max 31
SATURDAY: Few showers developing Max 25
Jacob
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018
From: Paul_Mossman at agd.nsw.gov.au
X-Lotus-Fromdomain: NSW_AG
To: aussie-weather at world.std.com
Date: Fri, 16 Apr 1999 21:07:04 +1000
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Sender: aussie-weather-approval at world.std.com
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Gday Michael!!!
Needless to say then that radar is ineffective for situations over say
120km (I know theres a physics formula that can work out distance to
horizon from elevation ) Williamtown's would only be effective to say
around the Bulahdelah area and even less effective towards Barrington Tops
(which reach 1550m above sea level).
Would be effective though for severe storms though given that these
monsters are between 10km - 20km high.
Coffs Harbour radar would almost be useless considering the location of the
escapement to the town centre (virtually on top off the City).
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019
From: John Woodbridge [jrw at pixelcom.net]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: RE: aus-wx: Incoherent radar observations vs rainfall totals.
Date: Wed, 14 Apr 1999 11:39:04 +1000
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Hi Paul,
Or more likely in Taree, the rain is evaporating on the way down & you get
less than shown on the loop. In many inland areas, good falls at say 1km
above ground never reach it.
Regards.
-----Original Message-----
From: Paul_Mossman at agd.nsw.gov.au [SMTP:Paul_Mossman at agd.nsw.gov.au]
Sent: Friday, 16 April 1999 20:18
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Great reading Anthony. well done.
Also topography plays a vital part in radar degradation too. This aspect
cannot be discounted.
One point: Where exactly (as in altitude) does the signal measure rain
intensity? This would also be interesting as (as well all know) smaller
concentrations of rain droplets are in the higher levels of normal rain
clouds, growing in density as they fall to the ground (such as the process
known as coalescence). This would be vital in places like Taree, nestled in
a valley of some sorts, where the radar "beam" cannot penetrate cause of
topography. Thus the radar loop shows say 10 -20mm per hour at the altitude
it is reflecting off, but closer to ground level water drops are much
larger and concentrated due to gravity, coalescence etc... and may be in
higher intensity scales.
Paul from Port.
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020
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: Hottest start to April in Perth for 21 years
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 11:49:11 +1000 (EST)
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>
> Hi Jacob,
>
> I have noticed that Perth's temps have stayed well up - something to do
> with the ongoing High's in the bight no doubt. As you may have read, we
> have been rather colder than what I would think to be normal. Often
> Brisbane weather seems to be the opposite of Perth, due again to the action
> of the weather pattern. For Perth to get the hot N'Easter, there has to be
> a high in the bight, which means we are usually getting South/SE often
> originating from way down near the bottom of New Zealand.
Actually, the correlation between maximum temperatures in Perth and
Brisbane is almost non-existent (less than 0.11) in all months.
On the other hand, there is a signifcant (0.3-0.41) negative
correlation between maximum temperatures at Melbourne and Perth in
all months between September and April.
Blair Trewin
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021
From: Paul_Mossman at agd.nsw.gov.au
X-Lotus-Fromdomain: NSW_AG
To: aussie-weather at world.std.com
Date: Fri, 16 Apr 1999 21:27:46 +1000
Subject: RE: aus-wx: Incoherent radar observations vs rainfall totals.
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True John. The good ol Virga.
Regards Paul.
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022
X-Sender: bayns at nornet.nor.com.au
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Date: Wed, 14 Apr 1999 12:38:25 +1000
To: aussie-weather at world.std.com
From: steve baynham [bayns at nor.com.au]
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
hey,
sin x 100 = sin 88
so at 100ks from radar, it would be picking up at 3.5km's high!
so there ya go, school was good for something
steve
At 11:18 AM 4/14/99 +1000, you wrote:
>
>
>
>The radar beam is angled at a couple of degrees from the horizontal (don't
>know exact figure), so the further the location from the radar, the higher
>in the sky it will actual 'see'. For places like Port Macquarie a few
>hundred kilometres away from any radar sites, the radar would be pointing
>at the sky several kilometres above ground. It would not pick up low cloud
>rainfall at all and may only register the tops of storms or thick rain
>bands.
>
>regards,
>
>Michael Bath
>
>
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> -----------------------jacob at iinet.net.au------------------------------
>
>
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023
X-Sender: cmaunder at mail.dynamite.com.au
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Date: Wed, 14 Apr 1999 13:28:49 +1000
To: aussie-weather at world.std.com
From: Chris Maunder [cmaunder at dynamite.com.au]
Subject: Re: aus-wx: Brisbane Totals + Brisbane Froze O'night
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
At 11:08 14/04/99 , you wrote:
>The -8.2 at Katoomba is a highly suspect observation; a more probable
>record low is -5.6. (On the day when Katoomba supposedly reached -8.2
>no other station in the region was much below 0). Katoomba is a warm
>site (relatively speaking) for minimum temperature, probably because
>of its position on top of the range. (While I'm not familiar with
>the actual site, I'm also aware that Simon Torok, when he was doing
>his study of the quality of long-term Australian temperature records,
>gave Katoomba a rating of 5, the worst possible; I'm not sure why).
I talked to Simon and he said the reason was that Katoomba moved from
the hotel to the PO in 1896, then exposure deteriorated due to building
activities through to 1947. There was a move to the College in 1965,
followed by a number of moves through the 70s and 80s. The main problem
though was the non-standard stand made of brown wood, used right up
until 1947. This means the results couldn't be compared to measurements at
other stations, taken in the Stevenson Screen, which was introduced as the
international standard exposure decades beforehand.
cheers,
Chris
------------------------------------------------------
Chris Maunder Canberra, Australia
Administrator CodeGuru - www.codeguru.com
Technical Consultant Dundas software - www.dundas.com
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024
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: aus-wx: Perth Airport has highest April min on record
To: aussie-weather at world.std.com (Aussie Weather)
Date: Wed, 14 Apr 1999 13:55:27 +1000 (EST)
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Perth Airport had a minimum of 24 degrees last night. This is a
new April record, breaking the previous record of 23.2.
The average maximum for the month so far is 30.4, about 4 degrees
above the normal for the period. As the record high April mean maximum
is 28.0 (1994), only 2.7 above the monthly mean, it would only need
to average slightly above normal from here to break the record.
Blair Trewin
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025
From: "Jane ONeill" [cadence at rubix.net.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Date: Wed, 14 Apr 1999 13:53:33 +1000
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OK - I appreciate the information - but can you explain the procedural
mathematics to me, cos it just doesn't make sense to me (um, did I mention
that maths wasn't exactly my strong point? - but I'd really like to
understand this).
Many thanks,
Jane
Bayswater, Melbourne
Thanks,
-----Original Message-----
From: steve baynham [bayns at nor.com.au]
To: aussie-weather at world.std.com [aussie-weather at world.std.com]
Date: Wednesday, 14 April 1999 12:52
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
>hey,
>
>sin x 100 = sin 88
>
>so at 100ks from radar, it would be picking up at 3.5km's high!
>so there ya go, school was good for something
>steve
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026
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Date: Wed, 14 Apr 1999 12:10:59 +0800
To: aussie-weather at world.std.com
From: Jacob [jacob at iinet.net.au]
Subject: Re: aus-wx: Perth Airport has highest April min on record
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
At 01:55 PM 14-04-99 +1000, you wrote:
>Perth Airport had a minimum of 24 degrees last night. This is a
>new April record, breaking the previous record of 23.2.
>
>The average maximum for the month so far is 30.4, about 4 degrees
>above the normal for the period. As the record high April mean maximum
>is 28.0 (1994), only 2.7 above the monthly mean, it would only need
>to average slightly above normal from here to break the record.
>
>Blair Trewin
Had the cloud started to roll in about 5 hours earlier then maybe it would
have been even higher, it was quite clear untill about 7am, right now we've
got about 6/8 cloud cover and its 28.0 at 12noon, would have been higher
had this cloud not been around.
21C is forecast for the city tonight, so we may get close again tonight,
especially if this cloud cover starys around.
Jacob
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027
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: Question for Blair - Comboyne Rain Figures
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 15:16:34 +1000 (EST)
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>
>
>
> Blair I was just wondering what the data for Comboyne rain figures are.
> Would be interesting considering the amount of received lately.
Comboyne no longer reports in real-time. The latest figures available
are for February.
Blair Trewin
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028
From: Paul_Mossman at agd.nsw.gov.au
X-Lotus-Fromdomain: NSW_AG
To: aussie-weather at world.std.com
Date: Sat, 17 Apr 1999 00:56:25 +1000
Subject: Re: aus-wx: Question for Blair - Comboyne Rain Figures
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Really? Wow.....thats interesting. I would have thought that Comboyne
reporting is important for flood summaries etc. as Comboynes figures play a
vital part in flood managment and warning.
Thanx again Blair - you are a treasure (heheh waiting to be dug up!!)
:-)
Regards.
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029
From: Bodie_27 at postmaster.co.uk
X-Lotus-Fromdomain: POSTMASTER
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 06:35:23 +0100
Subject: Re: aus-wx: RE: cold air tornadoes
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Thanks for that link David, i cant wait for the "Perth Storm Season" this
winter, finally get to watch these "monster fronts" on the models/sat pics
etc.. Hopefully the WA boys will get some more Tornado pics again this
year, have you seen the picture Ira from WA took of a tornado there last
season? Don't have the URL on me at the moment sorry..
Hey Ben,
I remember having a conversation Paul
(Graham) on cold 'season' tornadoes and he
sent me a BoM webpage on them:
http://www.bom.gov.au/bmrc/regn/expt/
tornado/WA/coldies_wa.htm
I remember a BoM page with a lot more
detail than the above but couldn't find it.
Other than cold season tornadoes the only
other 'cold' type I've heard of are cold
air funnels (they only rarely touchdown).
Your description of cold air tornado
formation is pretty close to what I have
read on these. They occur usually well
behind a cold front or trough in a
generally stable atmosphere: often there is
layer of more buoyant humid air beneath dry
air. I think some of the waterspouts which
have been observed of the east coast behind
a front are also thought to be cold cored.
David
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030
From: Bodie_27 at postmaster.co.uk
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To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 06:45:28 +0100
Subject: Re: aus-wx: Feb Totals
Sender: aussie-weather-approval at world.std.com
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Whoa! And i thought i had a wet Febuary, i recieved over 500mm here,
bringing my yearly total to over 800mm (although i dont have exact figures
at the moment, long story) to the end of March, and since then i've
recieved about 130mm or so.. so i'm nearing the 1000mm mark..
Here are the monthly totals taken from my fathers orchard on the sunshine
coast about 20 kilometers from Noosa:
Rainfall taken at Dept. of National Resources Permanent Marker No.
111186.
Jan..137mm. Feb..857mm. Mar..358mm. Apr..120mm. Total to 12
April....1472mm. Total for full year 1998..1416mm.
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031
From: Bodie_27 at postmaster.co.uk
X-Lotus-Fromdomain: POSTMASTER
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 06:59:30 +0100
Subject: Re: aus-wx: Brisbane Extremes
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hey Ben from Brisbane here..
On top of those Temperature extremes, i got some general weather extremes
from the BOM today for the Brisbane Airport site:
Highest yearly rainfall - 2170mm in 1974
Highest monthly rainfall - 803.6mm in January, 1974
Highest daily rainfall - 307.4mm on the 26th of January 1974
Strongest wind gust at Brisbane Airport - 185 km/h from the SSW on the 18th
of January, 1985.
Highest number of rain days per month - 30 days, in March 1956
Lowest monthly rainfall - 0mm in August 1991 (there are probably other
months where 0mm was recorded, but the "machine spat out this one",the
person i spoke too said)
Not sure if Blair has posted this one or not:
Most consecutive days over 35c - 6 days in NOV 1968
Obviously all the rain records were set in the Brisbane 1974 floods.
Records for Brisbane Airport and Amberley:
Brisbane AP
High 39.6 7/12/1981 (definitely 1981; the Regional Office
had its December record high, 41.2, on the same day)
Low 0.6 27/6/1971, 1/8/1994
Amberley
High 44.3 6/1/1994
Low -4.9 8/8/1995
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032
Date: Wed, 14 Apr 1999 16:14:30 +1000
From: Don White [donwhite at ozemail.com.au]
X-Mailer: Mozilla 4.5 [en] (Win98; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Question for Blair - Comboyne Rain Figures
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Comboyne is supposed to send in daily acc to the Sydney Bof M but is
very unreliable. There is an AWS (rain) at Combyne - back data
availabel from Manly Hydaulics and real time data also around.
cheers,
don White
Blair Trewin wrote:
>
> >
> >
> >
> > Blair I was just wondering what the data for Comboyne rain figures are.
> > Would be interesting considering the amount of received lately.
> Comboyne no longer reports in real-time. The latest figures available
> are for February.
>
> Blair Trewin
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033
Date: Wed, 14 Apr 1999 16:20:06 +1000
From: Don White [donwhite at ozemail.com.au]
X-Mailer: Mozilla 4.5 [en] (Win98; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Question for Blair - Comboyne Rain Figures
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Also... if you are interested
Comboyne in the past week:
9 0.5 ; 10th 5 mm; 11th 42 mm; 12th 3.5 mm and 13th 2.0 mm.
Don White wrote:
>
> Comboyne is supposed to send in daily acc to the Sydney Bof M but is
> very unreliable. There is an AWS (rain) at Combyne - back data
> availabel from Manly Hydaulics and real time data also around.
> cheers,
> don White
>
> Blair Trewin wrote:
> >
> > >
> > >
> > >
> > > Blair I was just wondering what the data for Comboyne rain figures are.
> > > Would be interesting considering the amount of received lately.
> > Comboyne no longer reports in real-time. The latest figures available
> > are for February.
> >
> > Blair Trewin
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034
From: Paul_Mossman at agd.nsw.gov.au
X-Lotus-Fromdomain: NSW_AG
To: aussie-weather at world.std.com
Date: Sat, 17 Apr 1999 01:58:00 +1000
Subject: Re: aus-wx: Question for Blair - Comboyne Rain Figures
Sender: aussie-weather-approval at world.std.com
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Cheers Don....you are a legend!
Regards, Paul.
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035
From: Bodie_27 at postmaster.co.uk
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To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 07:26:41 +0100
Subject: Re: aus-wx: SE QLD wx
Sender: aussie-weather-approval at world.std.com
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Hey Ben from Brisbane here..
Well.. I had a sneaking suspicion there might be some nice towers around
the place today after a quick look over the models last night - and there
were some Pearlers around.. It almost looked like we had a chance at a
storm here for an hour or so thisafternoon, with loads of Tcu around - with
some getting to the Calvus stage, and i even saw a weak shower/storm throw
off an anvil on the Sunshine Coast Hinterland mid afternoon.. The sea
breeze came in here (Redcliffe, northern Brisbane) about 2:30pm and killed
anything within 50k's of me.. but after a quick drive a few mins ago there
is a great looking Cu complex to my south and South-west over the border
ranges, a few spots of yellow on the radar down there.. and some really
nice stuff to my W/SW with that "boiling" look to it..
Thismornings soundings show the atmosphere is slightly unstable right up to
the 600mb level, and BOM include a "weak mid level trough" in the notes on
the weather thismorning, wich the models have been forecasting for the last
2 days..
I'm still optomistic about the upper level trough forecast for parts of QLD
towards the end of this week/over the weekend.. it still looks weak at this
stage, but then again it's the weak ones that mainly give us storms here -
if they're too strong it just rains, or there's too much cloud around for
any storms to form.. getting quite late for storms, I hope something
happens with this one..
BTW 122 knot jet over Brisbane today
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036
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Storm in Illawarra ( 5.30pm )
Date: Wed, 14 Apr 1999 17:55:50 +1000
X-Mailer: Microsoft Outlook Express 4.72.3110.1
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Nice little surprise with some very exciting CG's, the sort that pulse
several times. I did not have a car so had to observe from the top of the
local hill, several close CG's sent me packing, with one a swore I heard the
video camera give a little ' phizt ' type noise.
Rain soon followed, torrential just to east.
Very unexpected development. Will update if any news as a feel hail may have
fallen in area.
Michael Thompson
http://thunder.simplenet.com
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037
From: Bodie_27 at postmaster.co.uk
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To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 08:52:45 +0100
Subject: Re: aus-wx: Maclean - Yamba Supercell
Sender: aussie-weather-approval at world.std.com
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Hey Paul..
Just reading your Chase report from the Maclean - Yamba supercell in storm
news (i must be the last person to read storm news i know) and i notice you
took some pictures of the damage done, do you have any of these scanned or
on webspace?
That storm reminds me of a Storm we had in the Northern suburbs of Brisbane
on Christmas Eve 1988 (lousy timing hey).. I was talking to someone from
the Severe Weather section at BOM thisafternoon, and found out the storm
was officially classed as Tornadic - they even have video footage of a
funnel sighted from Clontart over Moretone bay (2km's from where i lived at
the time). They said the damage on the eastern side of Redcliffe was
definatly from a Tornado, although on the western side of Redcliffe it was
more like straight line wind damage, straight line wind damage in parts of
Brisbane too.. He also mentioned they susupect it produced a tornado on the
border ranges SW of Brisbane as well.
That was truly the worst storm i have ever been in, the lower level of our
house was flooded with a foot of water - just from the water overflowing
from the gutters and pooling up in a foyer at the front door! The wind was
so strong and the rain so intense that you couldn't see out of any windows
on ANY side of the house, they were all white, the rain was being pushed
through the window sills and spurting out like a fountain - it was an eary
feeling i can tell you, my whole family thought our time was up when the
house started creaking. Houses in my street were unroofed and some almost
totally demolished - one persons garage roof was found 500m down the road.
In some places there was hardly a tree that wasn't brought down, or
severely damaged.. And for the next 6 hours after the main storm, a
cluseter of electrical storms sat right over the top of us and produced a
lightshow wich i have personally still not seen any storm beat. I hope to
get some pictures of the damage done from the local newspapers and put
them on some webspace in the next few months.
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038
From: Paul_Mossman at agd.nsw.gov.au
X-Lotus-Fromdomain: NSW_AG
To: aussie-weather at world.std.com
Date: Sat, 17 Apr 1999 03:48:28 +1000
Subject: Re: aus-wx: Maclean - Yamba Supercell
Sender: aussie-weather-approval at world.std.com
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Hey Ben. yeah I have heaps of pics scanned...I just havnt had the time to
reduce them from 1mb each to less. I really need 1 week or so just to clean
up my webpage etc...but oh well busy busy busy!
Yeah the storm was definately the best I have experienced. There were
reports that Iluka residents (across the river) saw a rope like cloud from
the back of the storm touch down near Yamba...but as yet this is
unconfirmed.
Paul.
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039
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Illawarra Storm Update
Date: Wed, 14 Apr 1999 18:30:21 +1000
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Fantastic lightning show just off to NE now, over the ocean. Radio reports
said golf ball size hail fell in Shellharbour. This storm although small had
nasty written all over it. I do not think any land areas are being affected
anymore.
Michael Thompson
http://thunder.simplenet.com
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040
X-Sender: jimmyd at pop.ozemail.com.au
X-Mailer: QUALCOMM Windows Eudora Pro Version 4.0
Date: Wed, 14 Apr 1999 18:52:03 +1000
To: aussie-weather at world.std.com
From: Jimmy Deguara [jimmyd at ozemail.com.au]
Subject: Re: aus-wx: Illawarra Storm Update
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi Michael,
I did see this storm and kept watch for some time. It went very high. I did
expect something at least marginally severe so this confirms it.
Great to hear you told the BoM.
Jimmy Deguara
At 18:30 14/04/99 +1000, you wrote:
>Fantastic lightning show just off to NE now, over the ocean. Radio reports
>said golf ball size hail fell in Shellharbour. This storm although small had
>nasty written all over it. I do not think any land areas are being affected
>anymore.
>
>
>Michael Thompson
>http://thunder.simplenet.com
>
>
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> -----------------------jacob at iinet.net.au------------------------------
>
----------------------------------------------------------------------------
---------------
Jimmy Deguara
Vice President ASWA
from Schofields, Sydney
e-mail: jimmyd at ozemail.com.au
homepage with Michael Bath
http://www.australiansevereweather.simplenet.com/
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041
From: "Keith" [kevans at kisser.net.au]
To: "aussie-weather" [aussie-weather at world.std.com]
Subject: aus-wx: TC Vance
Date: Wed, 14 Apr 1999 16:53:50 +0800
X-Mailer: Microsoft Outlook Express 4.72.3155.0
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Evening all
As many of you might know JuNgLeJiM and myself recently made a trip to Exmouth to collect photos of the devastation left by TC Vance. Some of the photos from the trip are posted on the following URL.....
http://www.kisser.net.au/kevans/tc_vance/
Images posted at the moment are from a digital camera and we have just received back from the photo shop the ones from SLR camera and will post these as soon as we have the time to scan them :)
Keith aKa HeAdRuSh
Jason aKa JuNgLeJiM
Home URL www.kisser.net.au/kevans/weather
E-Mail kevans at kisser.net.au
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042
From: "Matthew Piper" [mjpiper at ozemail.com.au]
To: "Aussie Weather Mailing List" [aussie-weather at world.std.com]
Subject: aus-wx: Lightning Visible from Blue Mtns
Date: Wed, 14 Apr 1999 19:00:51 +1000
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Hi Everyone,
I can currently see the lightning from the Wollongong storm all the way from
where I am in the Lower Blue Mountains. I agree with Michael Thompson when
he said its putting on a great lightning show. There seems to be a flash
every few seconds from what I can see.
Matthew Piper
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043
From: "James Chambers" [jamestorm at ozemail.com.au]
To: "aus-wx" [aussie-weather at world.std.com]
Subject: aus-wx: Re: Redcliffe tornadic supercell 24/12/89
Date: Wed, 14 Apr 1999 19:05:03 +1000
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Heya Ben and all
It was actually Xmas Eve 1989 and there's a radar image of the storms on the
Brisbane Severe Thunderstorm Warning Service Brochure. Some NSW people
might be able to remember it because it was close to the Newcastle
Earthquake. At the time of the storm, I was in Coffs Harbour with the
family and came home on the 27th to numerous trees down over our yard and
there was isolated roof damage in my part of southern Brisbane.
Here are some notes written by Jeff Callaghan, of the BoM severe wx section
in Brisbane:
"Redcliffe Tornado with severe wind damage also in Brisbane. Yacht at
Newport Marina recorded in excess of 100 knots. ~500 homes unroofed, ~1000
damaged and 12 structurally unsafe"
Quite a major storm that one! I'll try to get more info to write up a full
report on my site. By the way, I have a page for all of my severe storm
reports: http://www.ozemail.com.au/~jamestorm/bristorm/reports.html,which
includes several severe storms pre-1997.
For Brisbane people on the list, are there anyone who remember the Nov 30
1991 storm in Brisbane? There was a possible tornado in Sunnybank which
unroofed 5 houses and damaged 20. I lived very close to there but I'm not
sure if I remember that one or not. I seem to recall a very spectacular
shelf cloud which may have been from that storm, but I can't be sure.
Regards
James
>That storm reminds me of a Storm we had in the Northern suburbs of Brisbane
>on Christmas Eve 1988 (lousy timing hey).. I was talking to someone from
>the Severe Weather section at BOM this afternoon, and found out the storm
>was officially classed as Tornadic - they even have video footage of a
>funnel sighted from Clontart over Moretone bay (2km's from where i lived at
>the time). They said the damage on the eastern side of Redcliffe was
>definatly from a Tornado, although on the western side of Redcliffe it was
>more like straight line wind damage, straight line wind damage in parts of
>Brisbane too.. He also mentioned they susupect it produced a tornado on the
>border ranges SW of Brisbane as well.
>
>That was truly the worst storm i have ever been in, the lower level of our
>house was flooded with a foot of water - just from the water overflowing
>from the gutters and pooling up in a foyer at the front door! The wind was
>so strong and the rain so intense that you couldn't see out of any windows
>on ANY side of the house, they were all white, the rain was being pushed
>through the window sills and spurting out like a fountain - it was an eary
>feeling i can tell you, my whole family thought our time was up when the
>house started creaking. Houses in my street were unroofed and some almost
>totally demolished - one persons garage roof was found 500m down the road.
>In some places there was hardly a tree that wasn't brought down, or
>severely damaged.. And for the next 6 hours after the main storm, a
>cluseter of electrical storms sat right over the top of us and produced a
>lightshow wich i have personally still not seen any storm beat. I hope to
>get some pictures of the damage done from the local newspapers and put
> them on some webspace in the next few months.
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044
Date: Wed, 14 Apr 1999 19:14:35 +1000
From: Anthony Cornelius [cyclone at stealth.com.au]
X-Mailer: Mozilla 4.5 [en] (Win98; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
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Reply-To: aussie-weather at world.std.com
Paul,
I think it was Rals(?) who told me of a situation where she was in
Townsville, and there was a severe t'storm...she reported it to the BoM
and they didn't even know it was there because of the mountain blocking
where she was! (Blocking the radar view) So yes, it certainly does
effect this greatly, and I'm sure there are many more examples out
there.
Anthony
Paul_Mossman at agd.nsw.gov.au wrote:
>
> Great reading Anthony. well done.
>
> Also topography plays a vital part in radar degradation too. This aspect
> cannot be discounted.
>
> One point: Where exactly (as in altitude) does the signal measure rain
> intensity? This would also be interesting as (as well all know) smaller
> concentrations of rain droplets are in the higher levels of normal rain
> clouds, growing in density as they fall to the ground (such as the process
> known as coalescence). This would be vital in places like Taree, nestled in
> a valley of some sorts, where the radar "beam" cannot penetrate cause of
> topography. Thus the radar loop shows say 10 -20mm per hour at the altitude
> it is reflecting off, but closer to ground level water drops are much
> larger and concentrated due to gravity, coalescence etc... and may be in
> higher intensity scales.
>
> Paul from Port.
>
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045
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Strom likely to hit Cronulla / Kurnell
Date: Wed, 14 Apr 1999 19:25:33 +1000
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Have been watching the rear of this storm as its moves up the coast from the
Illawarra, it has been sending some lovely rear updrafts in the last 30
minutes or so ( active lightning is letting me see it ). It looks like the
rear is back over land again north of Stanwell Park.
I would not surprised if Cronulla gets a beating shortly. Like I said this
has nasty written on it.
Another very small cell has just developed east of me, but over ocean.
Michael Thompson
http://thunder.simplenet.com
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046
From: "Jane ONeill" [cadence at rubix.net.au]
To: "Aussie Weather" [aussie-weather at world.std.com]
Subject: aus-wx: Lapse Rates
Date: Wed, 14 Apr 1999 19:29:52 +1000
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Can anyone please tell me what the 'normal' lapse rates are for the
different air masses that affect Australia??
How do lapse rates change with the moisture level and seasons within one
type of air mass??
Jane
Bayswater, Melbourne
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047
X-Sender: cmaunder at mail.dynamite.com.au
X-Mailer: QUALCOMM Windows Eudora Pro Version 4.0
Date: Wed, 14 Apr 1999 19:19:10 +1000
To: aussie-weather at world.std.com
From: Chris Maunder [cmaunder at dynamite.com.au]
Subject: Re: aus-wx: Lightning Visible from Blue Mtns
Sender: aussie-weather-approval at world.std.com
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There are a couple of cells E of Canberra that I'm hoping will allow
us down here to join in the fun.
Have a great night, all!
Chris
At 19:00 14/04/99 , you wrote:
>Hi Everyone,
>
>I can currently see the lightning from the Wollongong storm all the way from
>where I am in the Lower Blue Mountains. I agree with Michael Thompson when
>he said its putting on a great lightning show. There seems to be a flash
>every few seconds from what I can see.
>
>Matthew Piper
>
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------------------------------------------------------
Chris Maunder Canberra, Australia
Administrator CodeGuru - www.codeguru.com
Technical Consultant Dundas software - www.dundas.com
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048
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Fw: help!
Date: Wed, 14 Apr 1999 19:35:04 +1000
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Anybody who can explain this ( see message below ) please reply to
i am wondering if you
>know anything about the "cray weather" that occurred in Australia in
>November, 1994. if you do, are there any sites you could refer me to, in
>order to obtain some info.
whitts at senet.com.au
and the news group too, as I would love to know as well ?
Michael
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049
X-Originating-Ip: [203.25.186.111]
From: "Kevin Phyland" [kjphyland at hotmail.com]
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Date: Wed, 14 Apr 1999 03:08:58 PDT
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi Bayns,
Not for you I'm afraid... sin 2 degrees x 100 = 100 sin 2 NOT sin 88!
Kevin from Wycheproof.
:)
>From: steve baynham
>Reply-To: aussie-weather at world.std.com
>To: aussie-weather at world.std.com
>Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
>Date: Wed, 14 Apr 1999 12:38:25 +1000
>
>hey,
>
>sin x 100 = sin 88
>
>so at 100ks from radar, it would be picking up at 3.5km's high!
>so there ya go, school was good for something
>steve
>
>At 11:18 AM 4/14/99 +1000, you wrote:
>>
>>
>>
>>The radar beam is angled at a couple of degrees from the horizontal (don't
>>know exact figure), so the further the location from the radar, the higher
>>in the sky it will actual 'see'. For places like Port Macquarie a few
>>hundred kilometres away from any radar sites, the radar would be pointing
>>at the sky several kilometres above ground. It would not pick up low cloud
>>rainfall at all and may only register the tops of storms or thick rain
>>bands.
>>
>>regards,
>>
>>Michael Bath
>>
>>
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>>
>
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050
X-Originating-Ip: [203.25.186.111]
From: "Kevin Phyland" [kjphyland at hotmail.com]
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Date: Wed, 14 Apr 1999 03:11:50 PDT
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi Bayns,
just to clarify...without a base distance you're maths is meaningless.
Kevin.
>
>sin x 100 = sin 88
>
>so at 100ks from radar, it would be picking up at 3.5km's high!
>so there ya go, school was good for something
>steve
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051
X-Originating-Ip: [203.25.186.111]
From: "Kevin Phyland" [kjphyland at hotmail.com]
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Date: Wed, 14 Apr 1999 03:14:57 PDT
Sender: aussie-weather-approval at world.std.com
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Hi Bayns,
errr...now that I've REREAD your mail...your're right for 100 k's
distance....:(( Sorry for bothering everybody!
God! Don't you hate that?
Sheepish Kevin from boring, dry Wycheproof.
>
>sin x 100 = sin 88
>
>so at 100ks from radar, it would be picking up at 3.5km's high!
>so there ya go, school was good for something
>steve
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052
X-Originating-Ip: [203.25.186.111]
From: "Kevin Phyland" [kjphyland at hotmail.com]
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Incoherent radar observations vs rainfall totals.
Date: Wed, 14 Apr 1999 03:16:00 PDT
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi Bayns,
btw...it still only equalls sin 88 compared to being 1 km. from where
you are...
still sheepish Kevin from boring, dry Wycheproof.
>
>sin x 100 = sin 88
>
>so at 100ks from radar, it would be picking up at 3.5km's high!
>so there ya go, school was good for something
>steve
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053
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Date: Wed, 14 Apr 1999 20:20:30 +1000
To: aussie-weather at world.std.com
From: Michael Bath [mbath at ozemail.com.au]
Subject: aus-wx: sydney lightning
Sender: aussie-weather-approval at world.std.com
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quite a show now! (8.15pm)
constant glowing tops with CCs and cloud to sky bolts visible now and some
thunder
i'm out the front with the camera...
*==========================================================*
Michael Bath Oakhurst, Sydney mbath at ozemail.com.au
Australian Severe Weather
http://australiansevereweather.simplenet.com/
*==========================================================*
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054
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Pictures of Illawarra Storm - some lowerings
Date: Wed, 14 Apr 1999 20:53:57 +1000
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http://thunder.simplenet.com/140499.htm
What do everyone think ? Things happened so quickly at this stage, I was
under huge pine trees near the top of Mt Warrigal, to be honest I got about
two minutes of video before I got driven into the car by lightning then the
rain hit .
Michael Thompson
http://thunder.simplenet.com
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055
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Date: Wed, 14 Apr 1999 21:00:42 +1000
To: aussie-weather at world.std.com
From: Michael Bath [mbath at ozemail.com.au]
Subject: Re: aus-wx: Pictures of Illawarra Storm - some lowerings
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Great stuff Mike to have these online so quick. Very suspicious base
lowerings, sure looks quite severe. And this storm has persisted now right
up to the northern beaches crossing many suburbs now - I wonder what has
occurred - still no warnings.
The structure I have seen and photographed about 30 minutes ago showed
massive tops billowing towards the west in a strong backshear. In fact it
looked like the classic supercell back end. lLghtning bolts speared through
the anvil constantly for a while but then retreated back into the clouds.
I've taken a about 20 pics and will have some developed tomorrow.
Stratocu or cu has spread through from the SE now.
Michael
At 20:53 14/04/99 +1000, you wrote:
>http://thunder.simplenet.com/140499.htm
>
>What do everyone think ? Things happened so quickly at this stage, I was
>under huge pine trees near the top of Mt Warrigal, to be honest I got about
>two minutes of video before I got driven into the car by lightning then the
>rain hit .
*==========================================================*
Michael Bath Oakhurst, Sydney mbath at ozemail.com.au
Australian Severe Weather
http://australiansevereweather.simplenet.com/
*==========================================================*
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056
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Hail in Sydney
Date: Wed, 14 Apr 1999 21:03:44 +1000
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My wife has just arrived home and said she just heard on the radio that golf
ball size hail had been reported in Sydney's eastern suburbs.
She was at Shellharbour Workers Club at the time of the storm in the
Illawarra and said golf ball size hail did fall there. Checked the car for
hail dents, none, but then again I have a Nissan Patrol 4WD.
Michael Thompson
http://thunder.simplenet.com
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057
X-Sender: disarm at braenet.com.au (Unverified)
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Date: Wed, 14 Apr 1999 21:17:34 +1000
To: aussie-weather at world.std.com
From: Matt Smith [disarm at braenet.com.au]
Subject: aus-wx: 2nd storm!!!
Sender: aussie-weather-approval at world.std.com
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another cell is passing over cronulla at present, apparently that and the
1st cell are still both red on the radar!!! ive taken quiet a few lightnign
pics, with some nice CG's i hope !!
ive heard thunder twice from this 2nd cell so im sure i will here/see more
when it gets closer...
Michael T, great video !!!
ohh more thunder, im outta here again !! :)))))
Matt Smith
One VERY happy storm chaser !!!
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058
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Pictures of Illawarra Storm - some lowerings
Date: Wed, 14 Apr 1999 21:15:02 +1000
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I can't believe a warning has not gone out on this yet !
The BOM guy I reported this storm to said he found the hail that large hard
to believe, I told I do know what I am looking at and that the storm
although small " was a nasty piece of work "
I think its time that the AWSA introduced itself to the BOM.
Michael
-----Original Message-----
From: Michael Bath [mbath at ozemail.com.au]
To: aussie-weather at world.std.com [aussie-weather at world.std.com]
Date: Wednesday, 14 April 1999 20:56
Subject: Re: aus-wx: Pictures of Illawarra Storm - some lowerings
>Great stuff Mike to have these online so quick. Very suspicious base
>lowerings, sure looks quite severe. And this storm has persisted now right
>up to the northern beaches crossing many suburbs now - I wonder what has
>occurred - still no warnings.
>
>The structure I have seen and photographed about 30 minutes ago showed
>massive tops billowing towards the west in a strong backshear. In fact it
>looked like the classic supercell back end. lLghtning bolts speared through
>the anvil constantly for a while but then retreated back into the clouds.
>I've taken a about 20 pics and will have some developed tomorrow.
>
>Stratocu or cu has spread through from the SE now.
>
>Michael
>
>
>At 20:53 14/04/99 +1000, you wrote:
>>http://thunder.simplenet.com/140499.htm
>>
>>What do everyone think ? Things happened so quickly at this stage, I was
>>under huge pine trees near the top of Mt Warrigal, to be honest I got
about
>>two minutes of video before I got driven into the car by lightning then
the
>>rain hit .
>
>*==========================================================*
> Michael Bath Oakhurst, Sydney mbath at ozemail.com.au
> Australian Severe Weather
> http://australiansevereweather.simplenet.com/
>*==========================================================*
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059
Date: Wed, 14 Apr 1999 21:29:30 -0700
From: Michael Cross [wizard at terrigal.net.au]
X-Mailer: Mozilla 4.04 [en] (Win95; I)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Pictures of Illawarra Storm - some lowerings
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Michael Thompson wrote:
> I can't believe a warning has not gone out on this yet !
>
> The BOM guy I reported this storm to said he found the hail that large hard
> to believe, I told I do know what I am looking at and that the storm
> although small " was a nasty piece of work "
>
> I think its time that the AWSA introduced itself to the BOM.
>
> Michael
>
> -----Original Message-----
> From: Michael Bath
> To: aussie-weather at world.std.com
> Date: Wednesday, 14 April 1999 20:56
> Subject: Re: aus-wx: Pictures of Illawarra Storm - some lowerings
>
> >Great stuff Mike to have these online so quick. Very suspicious base
> >lowerings, sure looks quite severe. And this storm has persisted now right
> >up to the northern beaches crossing many suburbs now - I wonder what has
> >occurred - still no warnings.
> >
> >The structure I have seen and photographed about 30 minutes ago showed
> >massive tops billowing towards the west in a strong backshear. In fact it
> >looked like the classic supercell back end. lLghtning bolts speared through
> >the anvil constantly for a while but then retreated back into the clouds.
> >I've taken a about 20 pics and will have some developed tomorrow.
> >
> >Stratocu or cu has spread through from the SE now.
> >
> >Michael
> >
> >
> >At 20:53 14/04/99 +1000, you wrote:
> >>http://thunder.simplenet.com/140499.htm
> >>
> >>What do everyone think ? Things happened so quickly at this stage, I was
> >>under huge pine trees near the top of Mt Warrigal, to be honest I got
> about
> >>two minutes of video before I got driven into the car by lightning then
> the
> >>rain hit .
> >
> >*==========================================================*
> > Michael Bath Oakhurst, Sydney mbath at ozemail.com.au
> > Australian Severe Weather
> > http://australiansevereweather.simplenet.com/
> >*==========================================================*
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> > message.
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> >
>
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hi michael,michael cross here on the central coast,we are currently getting a
good lightning and thunder show to the south sounds preety heavy better turn the
cpu off for a while.ps good 3 foot waves here today mick cross aka dent
wizard...... hail baby hail.
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060
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Date: Wed, 14 Apr 1999 21:31:43 +1000
To: aussie-weather at world.std.com
From: Michael Bath [mbath at ozemail.com.au]
Subject: aus-wx: Sydney Hailstorm
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Just had a call from David Croan who's power has been knocked out - he's at
Beacon Hill. Fresh NE winds with stratus fed into this system up to 20
minutes prior to hitting - 2.5cm hail observed but larger thuds on the
roof. Some strong winds - he will give us the details tomorrow.
You guys on IRC should relay to the list the info you have (and pics) as
not all of us can use it....!!!!!!!
Michael
*==========================================================*
Michael Bath Oakhurst, Sydney mbath at ozemail.com.au
Australian Severe Weather
http://australiansevereweather.simplenet.com/
*==========================================================*
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061
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Pictures of Illawarra Storm - some lowerings
Date: Wed, 14 Apr 1999 21:37:01 +1000
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Hi Michael !!
We still have lightning south of us here in the southern Illawarra. I would
say Nowra at a guess, so things may get interesting in another hour again.
You may get 2-3 doses in the next few hours. The bigger one that hit
Wollongong and Sydney would be just moving north of the Hawkesbury now.
The surf here earlier today was 4ft and clean, but the wind was into it this
arvo.
Regards
Michael
--
>
> hi michael,michael cross here on the central coast,we are currently
getting a
>good lightning and thunder show to the south sounds preety heavy better
turn the
>cpu off for a while.ps good 3 foot waves here today mick cross aka
dent
>wizard...... hail baby hail.
>
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062
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Hail damage in Sydney
Date: Wed, 14 Apr 1999 22:03:30 +1000
X-Mailer: Microsoft Outlook Express 4.72.3110.1
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Just saw ABC footage of hail damage in Sydney. Said damage is into hundreds
of thousands, I saw badly dented cars, etc.
Not bad for a ' no warning ' storm.
Michael Thompson
http://thunder.simplenet.com
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063
X-Sender: disarm at mail.braenet.com.au
X-Mailer: Windows Eudora Pro Version 3.0 (32)
Date: Wed, 14 Apr 1999 22:33:07 +1000
To: aussie-weather at world.std.com
From: Matt Smith [disarm at braenet.com.au]
Subject: Re: aus-wx: Hail damage in Sydney
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi
my dad's workmate's daughter's car is a write off apparently, news reports
havent indicated where the damage is, although my dads freind said
inbetween the harbour and dee why... cant confirm though
still developing everywhere it seems, alot of lightning with both storms,
no rain from the 1st storm here, (Burwood) but plenty with the 2nd. thunder
can still be heard, i took over 2 rolls of photo's as well
(lightning,clouds) ...
thunder is becoming more and more requent again.. !!! that makes 3 storms
tonight! :))))
one word.. amazing !
Pics will be up tomorrow evening (if any turned out)
Matthew Smith
ASWA Committee Member
----------Storm Chase Reports and Photos:---------
------http://www.braenet.com.au/~disarm-----
>Just saw ABC footage of hail damage in Sydney. Said damage is into hundreds
>of thousands, I saw badly dented cars, etc.
>
>Not bad for a ' no warning ' storm.
>
>
>Michael Thompson
>http://thunder.simplenet.com
>
>
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064
X-Sender: mbath at ozemail.com.au
X-Mailer: QUALCOMM Windows Eudora Pro Version 4.1
Date: Wed, 14 Apr 1999 22:31:23 +1000
To: aussie-weather at world.std.com
From: Michael Bath [mbath at ozemail.com.au]
Subject: aus-wx: first Sydney warning!
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
SEVERE THUNDERSTORM ADVICE
BUREAU OF METEOROLOGY
NEW SOUTH WALES REGIONAL OFFICE
Issued at 2218 on Wednesday the 14th of April 1999
The severe thunderstorms that occurred over eastern parts of the
Sydney Metropolitan area earlier this evening have now moved out to
sea. A number of weaker thunderstorms are still evident over the
Sydney area and these will bring short periods of very heavy rainfall
with localised flash flooding. Further severe hail is not expected at
this stage.
If your house is damaged contact your local State Emergency Service
unit, listed under "S" in the White Pages, for emergency assistance.
Don't use the telephone during storms.
----------
Unbelievable it took this long to issue - Michael T reported to the BoM
about 4 hours ago
*==========================================================*
Michael Bath Oakhurst, Sydney mbath at ozemail.com.au
Australian Severe Weather
http://australiansevereweather.simplenet.com/
*==========================================================*
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065
From: "Keith" [kevans at kisser.net.au]
To: "aussie-weather" [aussie-weather at world.std.com]
Subject: aus-wx: Link to au.austnet.org #Weather via Web brouser
Date: Wed, 14 Apr 1999 20:32:16 +0800
X-Mailer: Microsoft Outlook Express 4.72.3155.0
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We currently have a URL available that will allow you access IRC via your web browser the URL is........
www.kisser.net.au/kevans/javachat
I suggest using IE4 or above only because there is a help link to let you set up your web browser with the Java IRC program.
Keith aKa HeAdRuSh
Jason aKa JuNgLeJiM
Home URL www.kisser.net.au/kevans/weather.html
E-Mail kevans at kisser.net.au
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066
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: "Sam Barricklow" [k5kj at pulse.net]
Subject: Re: aus-wx: first Sydney warning!
Date: Wed, 14 Apr 1999 22:51:11 +1000
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>Unbelievable it took this long to issue - Michael T reported to the BoM
>about 4 hours ago
Sorry if I offend anyone but....
...... and in regard to hail I was told " it seems unlikely ", I am quite
annoyed actually, I told the forecaster that I do know what I am loooking at
. I have written to Andrew Treloar, the BOM has to take us AWSA members
seriously, we know what we are looking at. I should have told him to go look
at a SE facing window.
Just saw a film clip with Tennis Ball size hail, flooded streets and badly
dented cars
>*==========================================================*
> Michael Bath Oakhurst, Sydney mbath at ozemail.com.au
> Australian Severe Weather
> http://australiansevereweather.simplenet.com/
>*==========================================================*
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067
From: Dane Newman [dpn at bigpond.com]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: aus-wx: Sydney Hailstorm
Date: Wed, 14 Apr 1999 22:48:07 +1000
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Just saw some footage of the hail in Sydney, looks great, where is Jimmy? I hope he is enjoying this. Dane
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068
From: Bodie_27 at postmaster.co.uk
X-Lotus-Fromdomain: POSTMASTER
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 14:04:21 +0100
Subject: Re: aus-wx: Lapse Rates
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hey Jane..
The normal lapse rate for us here in Brisbane i'd say would be around 5 to
5.5 C/Km - although the global average Lapse Rate is 6.5 C/Km.. When we
have an upper level trough over us or near us it can get as high as 7.5 - 8
C/Km and i've seen it higher in other places. As for how it varies from
season to season i'm not 100% sure, that's all i can say off the top of my
head.. i do have a few sites somewhere in my bookmarks that should tell you
everything you need to know.. i'll have a look for it first chance i get
tomorrow.
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069
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Sydney Hailstorm
Date: Wed, 14 Apr 1999 23:08:24 +1000
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It actually never moved more than a couple of kilometres from the ocean, so
I doubt that Jimmy would have got anything.
What he would have got is a great lightning show and storm structure views.
Michael
-----Original Message-----
From: Dane Newman [dpn at bigpond.com]
To: 'aussie-weather at world.std.com' [aussie-weather at world.std.com]
Date: Wednesday, 14 April 1999 23:02
Subject: aus-wx: Sydney Hailstorm
>Just saw some footage of the hail in Sydney, looks great, where is Jimmy? I
hope he is enjoying this. Dane
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070
From: Bodie_27 at postmaster.co.uk
X-Lotus-Fromdomain: POSTMASTER
To: aussie-weather at world.std.com
Date: Wed, 14 Apr 1999 14:23:28 +0100
Subject: Re: aus-wx: Sydney Hailstorm
Sender: aussie-weather-approval at world.std.com
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Hey..
Just saw some footage on Channel 10 news up here.. all i can say is HOLY
#$ at %! Looks like you guys got wiped off the map down there tonight! Hail
LARGER than tennis balls, and some really nice looking Cg's lighting up the
city.. apparently 20 fires raging throughout the city from lightning??
They're already saying Millions in damages ..
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071
From: DavidC at thevortex.com
To: aussie-weather at world.std.com
Subject: aus-wx: RE:Sydney storm
Date: Wed, 14 Apr 1999 08:50:08 -0500
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Back online after an early CG from the
storm took power out on the northern
beaches at about 8:30pm.
This was obviously a quite severe storm.
Interesting that it was long lived, very
intense and propogated aginst the direction
of shear??.....
In my local area initially there were some
extremely intense CGs with numerous bolts
in the immediate vicinity, winds bordering
on severe category and heavy rain some
small hail. Then we got a short sudden hail
shower towards the end with bigger hail -
when I did get out there were some decent
stones still around and these were near the
1 inch mark.
Looks like we got off lightly.
I haven't really been following models some
it will be intersting to see what got these
storms firing.
BTW Those pics of Michaels are awesome.
David
-----------------
Original Text from ""
>another cell is passing over cronulla at present, apparently that and the
>1st cell are still both red on the radar!!! ive taken quiet a few lightnign
>pics, with some nice CG's i hope !!
>ive heard thunder twice from this 2nd cell so im sure i will here/see more
>when it gets closer...
>Michael T, great video !!!
>
>ohh more thunder, im outta here again !! :)))))
>
>Matt Smith
>
>One VERY happy storm chaser !!!
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072
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: "Sam Barricklow" [k5kj at pulse.net]
Subject: aus-wx: Channel 7 grills BOM
Date: Wed, 14 Apr 1999 23:46:15 +1000
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Just watched a the late night news. The channel 7 news person spoke to a
Evan ...... from the Bureau. She grilled him as to why was there not a
warning issued, he said that he had had reports earlier of hail in
Wollongong ( who could that of been ? ), but this storm had moved out to sea
and that a second cell formed near Bundeena. Not the way I saw it, it was
the same cell as the one that moved thru Shellharbour at 5.30, it just keep
backbuilding. It may have been a supercell similar to the north coast job
earlier this season.
By the way, I DID NOT ring any media, I am not that stupid, although I am
annoyed ( not at the damage, but at not being taken seriously ) I still want
to preserve what little relationship us NSW chasers have with the Sydney
BOM.
Insurance companies are already saying at least $300 million damage.
Michael Thompson
http://thunder.simplenet.com
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073
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: RE:Sydney storm
Date: Wed, 14 Apr 1999 23:48:12 +1000
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The AVN model nailed the rain area about 24 hours ago, but undercooked the
intensity .
Michael
>
>I haven't really been following models some
>it will be intersting to see what got these
>storms firing.
>
>BTW Those pics of Michaels are awesome.
>
>David
>
>
>
>
>-----------------
>Original Text from ""weather at world.std.com>
>
>>another cell is passing over cronulla at present, apparently that and the
>>1st cell are still both red on the radar!!! ive taken quiet a few
lightnign
>>pics, with some nice CG's i hope !!
>>ive heard thunder twice from this 2nd cell so im sure i will here/see more
>>when it gets closer...
>>Michael T, great video !!!
>>
>>ohh more thunder, im outta here again !! :)))))
>>
>>Matt Smith
>>
>>One VERY happy storm chaser !!!
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>> message.
>> -----------------------jacob at iinet.net.au------------------------------
>>
>
>
>
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| Document: 990414.htm
Updated: 19 April 1999 |
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