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Storm News
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Australian Weather Mailing List Archives: Tuesday, 13 April 1999 |
From Subject
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001 "Marty" [martyp at dynamite.com.au] Bring on the cold weather...
002 "Craig Williams" [tincra at ecn.net.au] Brisbane Totals + Brisbane Froze O'night
003 Paul_Mossman at agd.nsw.gov.au Brisbane Totals + Brisbane Froze O'night
004 "Craig Williams" [tincra at ecn.net.au] Brisbane Totals + Brisbane Froze O'night
005 Paul_Mossman at agd.nsw.gov.au Re: Noosa Rain Totals
006 "Craig Williams" [tincra at ecn.net.au] Re: Noosa Rain Totals
007 Blair Trewin [blair at met.Unimelb.EDU.AU] Brisbane Totals + Brisbane Froze O'night
008 Paul_Mossman at agd.nsw.gov.au Re: Noosa Rain Totals
009 "Matthew Piper" [mjpiper at ozemail.com.au] Latest Climate Outlook
010 Paul_Mossman at agd.nsw.gov.au Question for Blair - Comboyne Rain Figures
011 "Matthew Piper" [mjpiper at ozemail.com.au] Red Centre Holiday Deal
012 Paul_Mossman at agd.nsw.gov.au Latest Climate Outlook
013 Blair Trewin [blair at met.Unimelb.EDU.AU] Latest Climate Outlook
014 Paul_Mossman at agd.nsw.gov.au Latest Climate Outlook
015 John Woodbridge [jrw at pixelcom.net] Brisbane Totals + Brisbane Froze O'night
016 John Woodbridge [jrw at pixelcom.net] Brisbane Totals + Brisbane Froze O'night
017 Anthony Cornelius [cyclone at stealth.com.au] Brisbane Totals + Brisbane Froze O'night
018 "Terry Bishop" [dymprog at mpx.com.au] Orange Weather
019 vortex at wwdg.com End Of Year Chase
020 Anthony Cornelius [cyclone at stealth.com.au] Brisbane Totals + Brisbane Froze O'night
021 Jacob [jacob at iinet.net.au] City weather station sites
022 Blair Trewin [blair at met.Unimelb.EDU.AU] City weather station sites
023 "W.A. (Bill) Webb" [billwebb at tpgi.com.au] Babinda Stats
024 John Woodbridge [jrw at pixelcom.net] Brisbane-wx
025 John Woodbridge [jrw at pixelcom.net] City weather station sites
026 Jacob [jacob at iinet.net.au] City weather station sites
027 Paul_Mossman at agd.nsw.gov.au City weather station sites
028 Blair Trewin [blair at met.Unimelb.EDU.AU] City weather station sites
029 "Chris Gribben" [chrisgribben at hotmail.com] Carnarvon on Thursday
030 DavidC at thevortex.com RE: cold air tornadoes
031 Greg CURTIS [curtisg at ecn.net.au] Brisbane Airport
032 DavidC at thevortex.com Storm chaser homepage back online
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001
From: "Marty" [martyp at dynamite.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Bring on the cold weather...
Date: Tue, 13 Apr 1999 01:21:30 +1000
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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
bed. I don't think I'll need an electric blanket - a this rate I'll be lucky
enough to actually use the doona (as opposed to just the doona cover!)
Marty.
Brisbane, Australia
martyp at dynamite.com.au
Images of Canberra: http://www2.dynamite.com.au/martyp
Lightning Photos: http://www2.dynamite.com.au/martyp/lightning
ICQ: 11790565
-----Original Message-----
>Well, I think it might almost be time to bring out the electric blanket
>from its summer hibernation. I'm actually looking forward for the
>weather to turn a bit nipply. Apart from the storm season its my
>favourite time of year. There's nothing better than walking along
>Southbank Parklands on a Sunday when it starts to cool dramatically.
>
>Any other thoughts from the Brisbanites on the list? Make the most of it
>I say, and practice those high cirrus pics that you've been dying for.
>
>Cheers from Brisbane,
>Rosco.
>
>BTW, theres some pics from the aftermath of the Mary River Valley floods
>from the other month that I've put online. You can access them from
>www.zipworld.com.au/~rportas/
>
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>
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002
From: "Craig Williams" [tincra at ecn.net.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Brisbane Totals + Brisbane Froze O'night
Date: Tue, 13 Apr 1999 08:54:11 +1000
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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.
Cheers...Craig
-----Original Message-----
- does anyone else have any totals? I'd be curious to see what
>they are:
>
>
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>
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003
From: Paul_Mossman at agd.nsw.gov.au
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To: aussie-weather at world.std.com
Date: Thu, 15 Apr 1999 18:41:41 +1000
Subject: Re: aus-wx: Brisbane Totals + Brisbane Froze O'night
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Gee Craig - those figures arnt too bad!
Paul.
"Craig Williams" on 13/04/99 08:54:11
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.
Cheers...Craig
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004
From: "Craig Williams" [tincra at ecn.net.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Brisbane Totals + Brisbane Froze O'night
Date: Tue, 13 Apr 1999 09:32:04 +1000
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Yes certainly wet enough....I think the bulk of the Feb total fell in only a
week...which would explain the floods I guess....I will grill him and see if
he has daily totals for that month....spose he is wondering why he bothered
putting in irrigation :-)
-----Original Message-----
>
>Gee Craig - those figures arnt too bad!
>
>Paul.
>
>
>
>
>
>
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005
From: Paul_Mossman at agd.nsw.gov.au
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To: aussie-weather at world.std.com
Date: Thu, 15 Apr 1999 19:20:51 +1000
Subject: aus-wx: Re: Noosa Rain Totals
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Haha.....yeah.....oh well. That would mean his 12 month figures from say
March last year to march this year would be close to 2500mm wouldnt it?
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006
From: "Craig Williams" [tincra at ecn.net.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Re: Noosa Rain Totals
Date: Tue, 13 Apr 1999 10:02:00 +1000
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One would think so...I will have to ask him....but I think yes as the bulk
of their rain fell in the second half of the year...maybe I should pinch his
log book..I am sure it would be a good read.
-----Original Message-----
>
>Haha.....yeah.....oh well. That would mean his 12 month figures from say
>March last year to march this year would be close to 2500mm wouldnt it?
>
>
>
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007
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: Tue, 13 Apr 1999 10:10:07 +1000 (EST)
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John Woodbridge wrote:
(snip)
>
> Funnily enough, our mins typically seem to be closer to Brisbane than
> Ipswich/Amberley which is what you might expect from the location being
> in-land 13 km directly due North of Ipswich. In fact last winter I recall
> one min which was 6 deg warmer than Amberley and 2 deg warmer than Brisbane
> airport. I think it has something to do with being up on a ridge in well
> treed hill country rather than on an open flat.
Absolutely. On clear, calm nights (especially) cool air, being denser,
tends to drain into valleys - this can have quite a dramatic impact
on minimum temperatures. (The best example I can think of is Inverell,
which has two sites - one in the centre of town in a valley and one on
a ridge, about 120m higher and 2km to the west. Despite urban effects,
the valley site averages 3.5-4 C lower for winter minima than the
ridge site).
The difference tends to break down on cloudy/windy nights - but then
in such conditions there won't be a lot of difference between Brisbane
Airport and Amberley anyway.
Interesting sidetrack - Brisbane Airport has quite a significant
discontinuity in the minimum temperature in ~1987 (I identified this
by statistical means - don't know the cause), and low minima there are
much more common than they were before the change. This means it's
probably only a matter of time before Brisbane Airport records a sub-
zero temperature - the site's equal record (0.6) from June 1971
probably equates to about -1 post-1987. (0.6 was also recorded in
August 1994).
Blair Trewin
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008
From: Paul_Mossman at agd.nsw.gov.au
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To: aussie-weather at world.std.com
Date: Thu, 15 Apr 1999 19:48:51 +1000
Subject: Re: aus-wx: Re: Noosa Rain Totals
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Would be a great data base for La Nina.......see if it really is starting
to kick.
On that note has anyone seen the latest and predicitons from the BOM??
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009
From: "Matthew Piper" [mjpiper at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Latest Climate Outlook
Date: Tue, 13 Apr 1999 10:39:15 +1000
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Hi Paul,
Here is a copy of the latest three month climate outlook from the Bureau.
MEDIA RELEASE - ISSUED 15th MARCH 1999
Three-month Seasonal Climate Outlook Summary: Rainfall probabilities for
April to June 1999.
Outlook indicators remain neutral
The National Climate Centre's rainfall outlook for April to June 1999 is
that there is no significant bias towards either wetter or drier than normal
conditions across the country. This implies roughly equal chances of the
coming three months being wetter than, drier than, or near normal.
This outlook results mostly from the neutral sea-surface temperature pattern
indices used to produce the outlook. These two numbers measure the strength
of La Ni�a/El Ni�o patterns in the Pacific, and a different pattern in the
Indian Ocean. Both values are very close to zero.
A second factor is the relatively low skill that the forecast system has
during this period. Large scale changes in climate and weather patterns
occur in Autumn, and the effects on Australia are highly variable from year
to year.
A weak and unusual La Ni�a pattern in the tropical Pacific, became even
weaker during February. North of the Equator the pattern is well defined,
but south of the Equator it is almost non-existent. On the other hand, the
sub-surface waters of the tropical Pacific continue to show a strong La Ni�a
signal.
Most computer models are suggesting La Ni�a will remain a feature for about
another three months, but beyond that they diverge in their predictions. No
model at this stage is suggesting an El Ni�o.
Meanwhile the Southern Oscillation Index (SOI) has remained moderately high
since June 1998. The unofficial SOI for the 30 days ending 13th March is
+10, following the February and January values of +9 and +16 respectively.
----- Original Message -----
> Would be a great data base for La Nina.......see if it really is starting
> to kick.
>
> On that note has anyone seen the latest and predicitons from the BOM??
>
>
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010
From: Paul_Mossman at agd.nsw.gov.au
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To: aussie-weather at world.std.com
Date: Thu, 15 Apr 1999 20:20:01 +1000
Subject: aus-wx: Question for Blair - Comboyne Rain Figures
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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.
The answer to the Bellenden Kerr rain figures I belive the highest total is
11,400mm or thereabouts. Not bad eh!
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011
From: "Matthew Piper" [mjpiper at ozemail.com.au]
To: "Aussie Weather Mailing List" [aussie-weather at world.std.com]
Subject: aus-wx: Red Centre Holiday Deal
Date: Tue, 13 Apr 1999 10:58:08 +1000
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Hi Everyone,
Know I now this isn't weather related but I have received a great holiday
deal from the UWS Nepean Alumni Association that I am a member of.
The details are as follows:-
Name: 1999 Red Centre Safari Adventure
Cost: $1250 normally $2500+
Tour Duration: 16 Days
Departure Date: Saturday 14th August 1999 from Sydney
The tour price includes all travel, all accommodation, 42 meals, sightseeing
and National Park Fees.
Some of the places that are visited include the following:-
Milparinka
Tibooburra
Camerons Corner
Innamincka
Coopers Creek
Channel Country
Great Stony, Gibson and Sandy Deserts
Birdsville
Boulia
Alice Springs
McDonnell Ranges
Kings Canyon
Ayers Rock
The Olgas
Coober Pedy
Lake Eyre South
Flinders Ranges
Broken Hill
So if anyone is interested could they please let me know as this offer is
only available to family and guests of UWS Nepean graduates of which I am
one.
Matthew Piper
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012
From: Paul_Mossman at agd.nsw.gov.au
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To: aussie-weather at world.std.com
Date: Thu, 15 Apr 1999 20:24:38 +1000
Subject: Re: aus-wx: Latest Climate Outlook
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Thanx Matt. So the BOM is having an each way bet!
But very interesting. Another interesting event is the weather in Colombia
at the present stage. After a devastating earthquake they are now having
torrential rain & floods, with the news last night saying "forecasters cant
see an end to the atrocious weather!"
Links to the theory that natural disasters and weather are inextricably
linked.
Paul.
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013
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: Latest Climate Outlook
To: aussie-weather at world.std.com
Date: Tue, 13 Apr 1999 11:05:18 +1000 (EST)
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>
> Hi Paul,
>
> Here is a copy of the latest three month climate outlook from the Bureau.
>
> MEDIA RELEASE - ISSUED 15th MARCH 1999
(snip)
There will be a new outlook issued tomorrow for the May-July period
(we're meeting this afternoon).
It's actually fairly rare for the Bureau to be particularly committal
at this time of year - the predictability of seasonal climate through
autumn is poor. It improves greatly through winter and spring.
Blair Trewin
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014
From: Paul_Mossman at agd.nsw.gov.au
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To: aussie-weather at world.std.com
Date: Thu, 15 Apr 1999 20:47:01 +1000
Subject: Re: aus-wx: Latest Climate Outlook
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Reply-To: aussie-weather at world.std.com
Why is the reason Blair? I realise that Autumn is reasonable unstable (as
the past 13 days have proved) Im just curious as to the processes !
On another note its great that you take the time and effort to contribute
to this list - and you always have such great little tidbits! Thanx again.
Regards, Paul (Looking at the deep blue sky in Port Macquarie)
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015
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 + Brisbane Froze O'night
Date: Tue, 13 Apr 1999 12:42:50 +1000
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Hi Blair,
Interesting feedback. Brisbane airport is right on Moreton Bay, and temps,
both max & mins are heavily influenced by the proximity to the normally
rather warm waters of the bay (to say nothing of the 3:00pm humidity
reading...). So the only time that Brisbane airport will report a
realisitic min for the greater city area would be on nights with offshore
winds. The discontinuity is interesting, maybe the site has been moved
(??) associated with changes at the airport (new runways, etc), just a few
hundred meters could make a difference being this close to the bay.
There has been a lot of snide comments over the years about the location of
the official site. Many tend to focus around the notion that it is
deliberately located here to make Brisbane seem more attractive to
tourists, i.e, not so hot in summer etc.. Of course, suitable sites close
to the city center don't exist anymore, although I did read a press report
some time ago that consideration was being given to moving the official
site to the botanic gardens at Mt. Coot-tha. While this may perhaps give a
more realistic picture for Brisbane as a whole, it would tend to upset
comparisons/averages, etc., recorded to date.
Regards,
-----Original Message-----
John Woodbridge wrote:
(snip)
>
> Funnily enough, our mins typically seem to be closer to Brisbane than
> Ipswich/Amberley which is what you might expect from the location being
> in-land 13 km directly due North of Ipswich. In fact last winter I
recall
> one min which was 6 deg warmer than Amberley and 2 deg warmer than
Brisbane
> airport. I think it has something to do with being up on a ridge in well
> treed hill country rather than on an open flat.
Absolutely. On clear, calm nights (especially) cool air, being denser,
tends to drain into valleys - this can have quite a dramatic impact
on minimum temperatures. (The best example I can think of is Inverell,
which has two sites - one in the centre of town in a valley and one on
a ridge, about 120m higher and 2km to the west. Despite urban effects,
the valley site averages 3.5-4 C lower for winter minima than the
ridge site).
The difference tends to break down on cloudy/windy nights - but then
in such conditions there won't be a lot of difference between Brisbane
Airport and Amberley anyway.
Interesting sidetrack - Brisbane Airport has quite a significant
discontinuity in the minimum temperature in ~1987 (I identified this
by statistical means - don't know the cause), and low minima there are
much more common than they were before the change. This means it's
probably only a matter of time before Brisbane Airport records a sub-
zero temperature - the site's equal record (0.6) from June 1971
probably equates to about -1 post-1987. (0.6 was also recorded in
August 1994).
Blair Trewin
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016
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 + Brisbane Froze O'night
Date: Tue, 13 Apr 1999 12:24:57 +1000
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Hi Anthony,
Yes I think you are right, trees certainly raise the humidity, which acts
to slow the cooling rate, plus the foliage acts like a blanket limiting
radiant heat loss from the ground, e.g., on days with a good frost you will
find the ground frost free under a heavy tree canopy. Depends on the tree
type and density, Eucalypts are much less effective than Rainforest species
for example.
But the ridge effect also comes in, the cooler air tending to sink into the
valleys to the point when I walk down my driveway which is 100m long and
falls 15m in height, either late at night or very early morning on calm
days, you can feel the temperature difference. It is also often visable as
ground fog occurring in the valleys.
If there is wind, it stirs up and mixes the air, thus these effects don't
occur, and the ground temps tend to stay well up.
p.s. It was 14C yesterday and I didn't check it this morning but I bet it
was closer to 13C. It was only 16C at midnight under a clear sky. I'm
going to go and check my figures/averages for last April. Gut feeling says
that it is cooler earlier this year than last, which may be a portent of
things to come. What's interesting is that these temps are occurring in a
fairly damp SE airstream, whereas I would normally associate temp drops in
April with dry W/SW conditions.
p.p.s some promising Cu building to the South.
Regards,
-----Original Message-----
Hi John,
John Woodbridge wrote:
>
> Hi Anthony,
> Didn't check the min this morning, yesterday was 15.0C.
> 17.5C at midnight last night.
>
> Funnily enough, our mins typically seem to be closer to Brisbane than
> Ipswich/Amberley which is what you might expect from the location being
> in-land 13 km directly due North of Ipswich. In fact last winter I
recall
> one min which was 6 deg warmer than Amberley and 2 deg warmer than
Brisbane
> airport. I think it has something to do with being up on a ridge in well
> treed hill country rather than on an open flat.
I believe the treed area affecting the temps has something to do with
the transpiration of trees (although this process only happens during
the day time) it does put out a fair bit of humidity, and thus will
raise the DP slightly. Also - trees would trap a layer of warm air (act
like a blanket) so if any wind was near by, it would be blowing the
slightly warmer air onto you...
Anthony
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017
Date: Tue, 13 Apr 1999 13:03:38 +1000
From: Anthony Cornelius [cyclone at stealth.com.au]
X-Mailer: Mozilla 4.5 [en] (Win98; I)
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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
Reply-To: aussie-weather at world.std.com
Hi Craig,
Wow - 120mm for April so far? Does he have the days/dates/times/amounts
that the rain fell?
Anthony
Craig Williams wrote:
>
> 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.
>
> Cheers...Craig
> -----Original Message-----
> From: Anthony Cornelius
> To: Australian Weather Mailing List
> Date: Monday, April 12, 1999 6:56 AM
> Subject: aus-wx: Brisbane Totals + Brisbane Froze O'night
>
> - does anyone else have any totals? I'd be curious to see what
> >they are:
> >
> >
> > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
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> > -----------------------jacob at iinet.net.au------------------------------
> >
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018
From: "Terry Bishop" [dymprog at mpx.com.au]
To: "Aussie-weather" [aussie-weather at world.std.com]
Subject: aus-wx: Orange Weather
Date: Tue, 13 Apr 1999 13:12:11 +1000
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Hi All,
Sorry to anybody confused by my 1980 date stamp the other day. My CMOS
battery has chucked it in and I forgot to reset the date.
Another fine day with about 30% Cu.
At 13.10 18C,60%,1027, E 0-5 Knots
Terry.
mailto:dymprog at mpx.com.au
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019
From: vortex at wwdg.com
Date: Mon, 12 Apr 1999 21:13:45 -0600
To: aussie-weather at world.std.com
Subject: RE: aus-wx: End Of Year Chase
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Jane, i'll definately be there for the chase....and anytime suits me. But mind you this is very early at the moment to confirm dates. I can get time whenever I need to, but dependent on others, although I can assure everyone,it was a great time and a wonderfull experience.
Paul.
Paul Yole
2 McDonald Street
Murtoa. Vic. 3390
Australia
Phone: (035) 385 2699
Mobile: 0419 367 920
Email: vortex at wwdg.com
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020
Date: Tue, 13 Apr 1999 13:30:25 +1000
From: Anthony Cornelius [cyclone at stealth.com.au]
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Subject: Re: aus-wx: Brisbane Totals + Brisbane Froze O'night
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Reply-To: aussie-weather at world.std.com
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 +
figures!) The same goes with the max temp, it's greatly affected by the
ocean (I think the Gold Coast is effected too?) Perhaps they should
keep the site there, but open up another one closer to the city -
although this would certainly cost more money. Interesting notion about
the tourists, I never thought about that, but I certainly would not be
surprised. As I said in a previous email, the main reason why Brisbane
gets so cold at times during winter, is the SW winds (the dreaded
SW'ly!!!) And since Brisbane rarely gets W'ly winds during summer, this
also explains why we don't get as many high 30/low 40 days as our
southern counterparts.
Anthony Cornelius
John Woodbridge wrote:
>
> Hi Blair,
>
> Interesting feedback. Brisbane airport is right on Moreton Bay, and temps,
> both max & mins are heavily influenced by the proximity to the normally
> rather warm waters of the bay (to say nothing of the 3:00pm humidity
> reading...). So the only time that Brisbane airport will report a
> realisitic min for the greater city area would be on nights with offshore
> winds. The discontinuity is interesting, maybe the site has been moved
> (??) associated with changes at the airport (new runways, etc), just a few
> hundred meters could make a difference being this close to the bay.
>
> There has been a lot of snide comments over the years about the location of
> the official site. Many tend to focus around the notion that it is
> deliberately located here to make Brisbane seem more attractive to
> tourists, i.e, not so hot in summer etc.. Of course, suitable sites close
> to the city center don't exist anymore, although I did read a press report
> some time ago that consideration was being given to moving the official
> site to the botanic gardens at Mt. Coot-tha. While this may perhaps give a
> more realistic picture for Brisbane as a whole, it would tend to upset
> comparisons/averages, etc., recorded to date.
>
> Regards,
>
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021
X-Sender: jacob at iinet.net.au
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Date: Tue, 13 Apr 1999 13:05:15 +0800
To: aussie-weather at world.std.com
From: Jacob [jacob at iinet.net.au]
Subject: aus-wx: City weather station sites
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
At 01:30 PM 13-04-99 +1000, you 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 +
>figures!) The same goes with the max temp, it's greatly affected by the
>ocean (I think the Gold Coast is effected too?) Perhaps they should
>keep the site there, but open up another one closer to the city -
>although this would certainly cost more money. Interesting notion about
>the tourists, I never thought about that, but I certainly would not be
>surprised. As I said in a previous email, the main reason why Brisbane
>gets so cold at times during winter, is the SW winds (the dreaded
>SW'ly!!!) And since Brisbane rarely gets W'ly winds during summer, this
>also explains why we don't get as many high 30/low 40 days as our
>southern counterparts.
>
>Anthony Cornelius
>
Yeah, it sucks when they change the official weather sites for the city,
Brisbane is affected a lot when they changed to the airport site in the mid
1980's. The old city site rarely got over 40C anyway, but it had a much
greater chance of it doing so than the airport site, highest in the old
city site is 43.2C back in 1940, while the airport has never made the 40C
mark.
Adelaide has also been affected, not only with a site change to the suburb
of Kent Town, but also that they use to record the official temperatures in
the old Glaisher Screen, instead of a nearby Stevenson screen which all
stations use today.
Here in Perth we had a site change in 1994, when the city site was changed
to the inner suburb of Mount Lawley, and for some strange reason, I'm not
sure why, it has much colder winter minimums than the old East Perth site,
even though both of those suburbs border each other. Summer temperatures
and winter maxmimums I have noticed are pretty much the same as the old
East Perth site.
>From the five major cities, I think only Sydney and Melbourne havent had
their official city weather sites moved.
32.5C here in Perth at 1pm by the way, with the chance of a thundery shower
or two, it should be in the 30s for the rest of the week, quite hot for April.
Jacob
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022
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: City weather station sites
To: aussie-weather at world.std.com
Date: Tue, 13 Apr 1999 16:20:24 +1000 (EST)
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Sender: aussie-weather-approval at world.std.com
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>
> At 01:30 PM 13-04-99 +1000, you 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 +
> >figures!) The same goes with the max temp, it's greatly affected by the
> >ocean (I think the Gold Coast is effected too?) Perhaps they should
> >keep the site there, but open up another one closer to the city -
> >although this would certainly cost more money. Interesting notion about
> >the tourists, I never thought about that, but I certainly would not be
> >surprised. As I said in a previous email, the main reason why Brisbane
> >gets so cold at times during winter, is the SW winds (the dreaded
> >SW'ly!!!) And since Brisbane rarely gets W'ly winds during summer, this
> >also explains why we don't get as many high 30/low 40 days as our
> >southern counterparts.
> >
> >Anthony Cornelius
> >
>
> Yeah, it sucks when they change the official weather sites for the city,
> Brisbane is affected a lot when they changed to the airport site in the mid
> 1980's. The old city site rarely got over 40C anyway, but it had a much
> greater chance of it doing so than the airport site, highest in the old
> city site is 43.2C back in 1940, while the airport has never made the 40C
> mark.
The old city site was on the roof of the Regional Office and had
become hopelessly unrepresentative. There's also a site at Archerfield
airport, which is more representative of the city area than Amberley,
but its record is not all that long (yet).
The airport record is 39.6 in December 1981.
> Adelaide has also been affected, not only with a site change to the suburb
> of Kent Town, but also that they use to record the official temperatures in
> the old Glaisher Screen, instead of a nearby Stevenson screen which all
> stations use today.
Two issues here:
- the change to Kent Town. This doesn't appear to have had that much
of an impact - a small drop in winter minimum temperatures but
nothing too substantial.
- Adelaide operated two sites in parallel from 1887 to (I think) 1948,
one using a Glaisher stand, the other a Stevenson screen. The data
in the Bureau's database is, as far as I know, from the Stevenson
screen throughout. However, the often-quoted record high for Adelaide
of 47.6 is from the Glaisher stand. The Stevenson screen recorded 46.1
on the same day.
(I pity whoever's on duty at the SA regional office of the Bureau on
the day when it is somewhere between 46.1 and 47.6, trying to explain
the distinction).
> Here in Perth we had a site change in 1994, when the city site was changed
> to the inner suburb of Mount Lawley, and for some strange reason, I'm not
> sure why, it has much colder winter minimums than the old East Perth site,
> even though both of those suburbs border each other. Summer temperatures
> and winter maxmimums I have noticed are pretty much the same as the old
> East Perth site.
I'm not familiar with the Mount Lawley site but suspect topography
may be a factor. The difference actually only shows up on about the
coldest 30% of nights in winter - there is little difference on warmer
nights, or in summer. As noted earlier in the Brisbane thread, quite
minor topographic differences can easily produce significant
differences in minimum temperatures.
The 'Perth City' site has also moved around quite a lot prior to 1992.
The lack of a vaguely homogeneous long-term site in the Perth region
is actually a real problem in climate studies - at least the other
big cities have sites on their fringes going back to at least the
1940's, but the only such site anywhere near Perth is Rottnest, which
is hardly a representative site. (Perth Airport is the least worst,
but is starting to show too much of an urbanisation signal for
comfort).
> >From the five major cities, I think only Sydney and Melbourne havent had
> their official city weather sites moved.
Not in recent times, anyway. (Melbourne last moved in the early years
of this century).
> 32.5C here in Perth at 1pm by the way, with the chance of a thundery shower
> or two, it should be in the 30s for the rest of the week, quite hot for April.
Agreed.
The seasonal temperature outlook for WA will make interesting reading
when it comes out...
Blair Trewin
> Jacob
>
>
>
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023
From: "W.A. (Bill) Webb" [billwebb at tpgi.com.au]
To: "Aussie Weather Net" [aussie-weather at world.std.com]
Subject: aus-wx: Babinda Stats
Date: Tue, 13 Apr 1999 15:07:25 +1000
X-Mailer: Microsoft Outlook Express 4.72.2106.4
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Hi all,
I know it has been pretty wet about the place this year, but thought you may be interested in this article from a sugar industry newsletter
starts:
Until last month, Babinda can farmer Ron ...... thought he knew all there was to know about heavy rain and wet weather. Between March 11 and 17 this year Ron and his trusty rain gauge registrations are as follows:
March mm
12 133
13 177
14 86
15 122
16 309
17 474
Total 1301 mm for the six days or some 52 inches in the old scale.
Ron...........
ends
Not all beer, skittles and fishing for cane cockies this year!
Cheers
Bill Webb
Proserpine
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024
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-wx
Date: Tue, 13 Apr 1999 16:42:19 +1000
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Hi all,
Cu has finally broken through the cap to the S/W, but nothing very dramatic. Some echoes appearing on the radar around Cunninghams Gap.
Regards,
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025
From: John Woodbridge [jrw at pixelcom.net]
To: "'aussie-weather at world.std.com'" [aussie-weather at world.std.com]
Subject: RE: aus-wx: City weather station sites
Date: Tue, 13 Apr 1999 16:54:43 +1000
Organization: Pixel Components
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Hi Blair,
That record max for Brisbane Airport, Dec 81, you sure that wasn't 91? I
recall coming up from Sydney some 7 or so years back now to mow my block
(now house) at Mt. Crosby, and as luck would have it, on the chosen day it
was reported as 43 point something at Ipswich with high humidity and I fair
near expired from heat exhaustion. I can't recall Brisbane's max on that
day, but it must have been way up there.
Re Perth. East Perth is on the Swan River, maybe that had something to do
with it if the site was close.
Regards,
-----Original Message-----
>
> At 01:30 PM 13-04-99 +1000, you 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 +
> >figures!) The same goes with the max temp, it's greatly affected by the
> >ocean (I think the Gold Coast is effected too?) Perhaps they should
> >keep the site there, but open up another one closer to the city -
> >although this would certainly cost more money. Interesting notion about
> >the tourists, I never thought about that, but I certainly would not be
> >surprised. As I said in a previous email, the main reason why Brisbane
> >gets so cold at times during winter, is the SW winds (the dreaded
> >SW'ly!!!) And since Brisbane rarely gets W'ly winds during summer, this
> >also explains why we don't get as many high 30/low 40 days as our
> >southern counterparts.
> >
> >Anthony Cornelius
> >
>
> Yeah, it sucks when they change the official weather sites for the city,
> Brisbane is affected a lot when they changed to the airport site in the
mid
> 1980's. The old city site rarely got over 40C anyway, but it had a much
> greater chance of it doing so than the airport site, highest in the old
> city site is 43.2C back in 1940, while the airport has never made the 40C
> mark.
The old city site was on the roof of the Regional Office and had
become hopelessly unrepresentative. There's also a site at Archerfield
airport, which is more representative of the city area than Amberley,
but its record is not all that long (yet).
The airport record is 39.6 in December 1981.
> Adelaide has also been affected, not only with a site change to the
suburb
> of Kent Town, but also that they use to record the official temperatures
in
> the old Glaisher Screen, instead of a nearby Stevenson screen which all
> stations use today.
Two issues here:
- the change to Kent Town. This doesn't appear to have had that much
of an impact - a small drop in winter minimum temperatures but
nothing too substantial.
- Adelaide operated two sites in parallel from 1887 to (I think) 1948,
one using a Glaisher stand, the other a Stevenson screen. The data
in the Bureau's database is, as far as I know, from the Stevenson
screen throughout. However, the often-quoted record high for Adelaide
of 47.6 is from the Glaisher stand. The Stevenson screen recorded 46.1
on the same day.
(I pity whoever's on duty at the SA regional office of the Bureau on
the day when it is somewhere between 46.1 and 47.6, trying to explain
the distinction).
> Here in Perth we had a site change in 1994, when the city site was
changed
> to the inner suburb of Mount Lawley, and for some strange reason, I'm not
> sure why, it has much colder winter minimums than the old East Perth
site,
> even though both of those suburbs border each other. Summer temperatures
> and winter maxmimums I have noticed are pretty much the same as the old
> East Perth site.
I'm not familiar with the Mount Lawley site but suspect topography
may be a factor. The difference actually only shows up on about the
coldest 30% of nights in winter - there is little difference on warmer
nights, or in summer. As noted earlier in the Brisbane thread, quite
minor topographic differences can easily produce significant
differences in minimum temperatures.
The 'Perth City' site has also moved around quite a lot prior to 1992.
The lack of a vaguely homogeneous long-term site in the Perth region
is actually a real problem in climate studies - at least the other
big cities have sites on their fringes going back to at least the
1940's, but the only such site anywhere near Perth is Rottnest, which
is hardly a representative site. (Perth Airport is the least worst,
but is starting to show too much of an urbanisation signal for
comfort).
> >From the five major cities, I think only Sydney and Melbourne havent had
> their official city weather sites moved.
Not in recent times, anyway. (Melbourne last moved in the early years
of this century).
> 32.5C here in Perth at 1pm by the way, with the chance of a thundery
shower
> or two, it should be in the 30s for the rest of the week, quite hot for
April.
Agreed.
The seasonal temperature outlook for WA will make interesting reading
when it comes out...
Blair Trewin
> Jacob
>
>
>
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail
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> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
>
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026
X-Sender: jacob at iinet.net.au
X-Mailer: Windows Eudora Light Version 3.0.1 (32)
Date: Tue, 13 Apr 1999 15:19:16 +0800
To: aussie-weather at world.std.com
From: Jacob [jacob at iinet.net.au]
Subject: RE: aus-wx: City weather station sites
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
At 04:54 PM 13-04-99 +1000, you wrote:
>
>Re Perth. East Perth is on the Swan River, maybe that had something to do
>with it if the site was close.
>
>Regards,
Mount Lawley is also right near the Swan River. The suburb as far as I know
isnt in any valley, but I'm not sure where the actual site is located in
Mount Lawley, maybe its in a small ditch or something, I've also noticed
that on some of those cold winter nights, all other metro stations are
having a light breaze, while Mount Lawley is calm, which ofcourse helps
bring down the temps on those cold clear winter nights.
Another interesting metro site in Perth, is Jandakot, located about 10km
south of the city, it has by far the coldest winter nights in Perth,
getting as low as -3C last year while at Mount Lawley on the same night it
got down to 0C. Perth Airport which is about 10km east of the city you
would expect those clear calm winter nights to be colder being further
inland then Jandakot and Mount Lawley, but on most of those nights its
always warmer except on the odd occasion.
Even though Perth Airport has been as low as -1.1C back in 1946, the Mount
Lawley equivlent for that morning would have probably been colder when you
compare recent winter minimums had the station been around at the time.
Jacob
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027
From: Paul_Mossman at agd.nsw.gov.au
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To: aussie-weather at world.std.com
Date: Fri, 16 Apr 1999 03:15:28 +1000
Subject: RE: aus-wx: City weather station sites
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As with the Brisbane etc sites, Taree has just had the change to an AWS at
the Airport. Low temps for winter should be interesting to watch as the
airport site is close to a river (Dawsons river) and is more exposed then
the radio station site (which is also in a hollow). I suspect that the min
temps could vary by a few points but Im interested to see the wind
variations as the airport AWS should be more accurate to wind direction &
strength.
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028
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: City weather station sites
To: aussie-weather at world.std.com
Date: Tue, 13 Apr 1999 18:04:09 +1000 (EST)
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>
>
>
> As with the Brisbane etc sites, Taree has just had the change to an AWS at
> the Airport. Low temps for winter should be interesting to watch as the
> airport site is close to a river (Dawsons river) and is more exposed then
> the radio station site (which is also in a hollow). I suspect that the min
> temps could vary by a few points but Im interested to see the wind
> variations as the airport AWS should be more accurate to wind direction &
> strength.
The town site is still operational (I don't know if there are any plans
to close it or not), so we should have some good comparison data.
Blair Trewin
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029
X-Originating-Ip: [203.108.181.62]
From: "Chris Gribben" [chrisgribben at hotmail.com]
To: aussie-weather at world.std.com
Subject: aus-wx: Carnarvon on Thursday
Date: Tue, 13 Apr 1999 01:15:07 PDT
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The area around Carnarvon is looking VERY good for Thursday at 00z.
Lifted Index is as low as -10 just off the coast, tot-tots are in the
60s for the same area. The 200hpa jet is around 110-180 kmh, though
there is not as much divergence as I'd like. There is decent
vorticity in the area at both 700 and 500hpa. Assuming I read the
models correctly for the vorticity forecasts, I'd advise everyone on
the list to keep an eye out for the weather over there on Thursday. I
was looking at the MRF (NCEP) models to those who want to look it up
themselves. Wish I lived around there all of a sudden :-(
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030
From: DavidC at thevortex.com
To: aussie-weather at world.std.com
Subject: aus-wx: RE: cold air tornadoes
Date: Tue, 13 Apr 1999 04:45:54 -0500
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>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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031
Date: Tue, 13 Apr 1999 20:24:15 +0000
From: Greg CURTIS [curtisg at ecn.net.au]
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To: aussie-weather at world.std.com
Subject: aus-wx: Brisbane Airport
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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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032
From: DavidC at thevortex.com
To: aussie-weather at world.std.com
Subject: aus-wx: Storm chaser homepage back online
Date: Tue, 13 Apr 1999 05:57:39 -0500
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For those who don't already know, the storm
chaser homepage finally seems to have a new
address. It's been offline for over a year
and I hadn't bothered checking it until
tonight. Update your links and visit it at:
http://weather.admin.niu.edu/chaser/
This page has some great educational
material, numerous chase reports, up to
date model data for the US, links etc etc.
David
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| Document: 990413.htm
Updated: 19 April 1999 |
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