|
Storm News
[Index][Aussie-Wx] |
Australian Weather Mailing List Archives: Friday, 27 August 1999 |
From Subject
--------------------------------------------------------------------------------------
001 Harald Richter [spatz at atmos.albany.edu] Another Question (fwd)
002 wbc at ozemail.com.au (Laurier Williams) Another Question
003 wbc at ozemail.com.au (Laurier Williams) Bureau policies"
004 wbc at ozemail.com.au (Laurier Williams) Sydney radar anomaly
005 wbc at ozemail.com.au (Laurier Williams) Bureau policies
006 "Marty" [martyp at dynamite.com.au] 3D photos
007 Ben Quinn [bodie at flatrate.net.au] Sydney radar anomaly
008 "Nick Sykes" [nsykes at labyrinth.net.au] Good rain in Melbourne
009 Anthony Cornelius [cyclone at flatrate.net.au] Nice Mildura Radar
010 Anthony Cornelius [cyclone at flatrate.net.au] Mildura radar is dodgy
011 Anthony Cornelius [cyclone at flatrate.net.au] Storm Chasing vs Fuel
012 peter.corlett at doi.vic.gov.au Storm Chasing vs Fuel
013 "Dane Newman" [dpn at bigpond.com] Good rain in Melbourne
014 "Jane ONeill" [cadence at rubix.net.au] Melbourne rain
015 "Patrick Tobin" [pdtobin at hotmail.com] Canberra rain
016 Michael Scollay [michael.scollay at telstra.com. Upcoming SEQ Weather
017 Michael Scollay [michael.scollay at telstra.com. Recent Mallee weather
018 Blair Trewin [blair at met.Unimelb.EDU.AU] met course (fwd)
019 Halden Boyd [halden at lis.net.au] Re: How to get PCA Charts Easy
020 Ben Quinn [bodie at flatrate.net.au] SE QLD/NE NSW Storms
021 "Dr David Jones" [ie at world.std.com] : comments on models..
022 "James Chambers" [jamestorm at ozemail.com.au] Updated N NSW Severe T'storm Advice
023 Ben Quinn [bodie at flatrate.net.au] Hailstorms?
024 "James Chambers" [jamestorm at ozemail.com.au] SE QLD warning
025 Halden Boyd [halden at lis.net.au] SE QLD/NE NSW Storms
026 "John Graham" [gorzzz at optusnet.com.au] Storm Chasing vs Fuel
027 "Michael Thompson" [michaelt at ozemail.com.au] Dissapointing Illawarra - but models had it right
028 "Michael Thompson" [michaelt at ozemail.com.au] Sydney radar anomaly
029 "Dane Newman" [dpn at bigpond.com] 4 day Press Chart (http://www.bom.gov.au/products/IDG00V56.s
030 "Michael Thompson" [michaelt at ozemail.com.au] Storm Chasing vs Fuel
031 Andrew Puddifer [andypudd at backmeup.net.au] Storm Chasing vs Fuel
032 Michael Scollay [michael.scollay at telstra.com. Re: comments on models - was "Re:" - no subject...
033 Michael Scollay [michael.scollay at telstra.com. Gulgong 9am Obs?
034 Blair Trewin [blair at met.Unimelb.EDU.AU] Gulgong 9am Obs?
035 Ben Quinn [bodie at flatrate.net.au] SE QLD/NE NSW Storms
036 wbc at ozemail.com.au (Laurier Williams) Gulgong 9am Obs?
--------------------------------------------------------------------------------------
001
From: Harald Richter [spatz at atmos.albany.edu]
Subject: Re: aus-wx: Another Question (fwd)
To: aussie-weather at world.std.com
Date: Thu, 26 Aug 1999 13:49:53 +0000 (GMT)
X-Mailer: ELM [version 2.4ME+ PL39 (25)]
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Maybe these "gulf lines" are lines of organised convection
that formed along a sea-breeze front.
As far as I know "morning glories" need a coolish, stable
boundary layer on which they travel. You would find those
mainly over land and, guess what, in the morning, before
the sun turns on all those messy boundary layer eddies.
My $0.02 worth, Harald
----- Forwarded message from Ben Quinn -----
>From aussie-weather-approval at world.std.com Thu Aug 26 08:04:08 1999
Message-ID: <37C4EC7F.542F4B85 at flatrate.net.au>
Date: Thu, 26 Aug 1999 17:27:59 +1000
>From: Ben Quinn
X-Mailer: Mozilla 4.61 [en] (Win95; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Another Question
References: <199908260601.QAA05052 at godzilla.zeta.org.au>
Sender: aussie-weather-approval at world.std.com
Precedence: list
Reply-To: aussie-weather at world.std.com
Hey Grant, Matt, Everyone..
>From memory gulf lines are what Matt Smith stated - Lines of
convection/storms aligned N/S in northern Australia.. They often move
from east to west in the Gulf of Carpentaria and the NT..
I can't be 100% sure but i think Gulf Lines and The Morning Glory are
two different things.. I just returned "The Australian Weather Book" to
the local library after they started jumping up and down because i had
it out for 4 months or something - It's a great book.. But if anyone has
this book both Gulf Lines and The Morning Glory (If the are two
different things) are explained very well in there..
I found a sat pic of a Morning Glory in the Gulf of Carpentaria as
well.. looks a bit different to the examples of Gulf Lines i've seen..
http://www.dropbears.com/brough/satpic.htm
Grant Boyden wrote:
>
> Gulf lines are also called Morning Glory.
>
> They are very interesting and usually arrive for a short time around the
> change of season.
>
> Some hangg liders have tried to surf these lines of clouds that are from
> N-S in direction and are usually gone by 10am.
>
> I think that's what you are talking about.
> ******************************************
> Grant Boyden
>
> GB Commentary Productions
> The First And Last Words In Commentary
> http://www.gbmotorsport.com
>
> http://marina.fortunecity.com/seafarer/460/index.html
> ******************************************
>
> ----------
> > From: Matt Smith
> > To: aussie-weather at world.std.com
> > Subject: Re: aus-wx: Another Question
> > Date: Thursday, 26 August 1999 15:24
> >
> > Hi Paul
> >
> > I could be very wrong here, but on the sat pics from time to time ive
> > noticed a line of cloud lining N-S moving west over the Gulf of
> > Carpentaria, Maybe that is it ?
> >
> > Matt Smith
> >
> > >
> > >
> > >Today Show Weatherman Monty Dwyer often refers to "Gulf Lines" -
> > >
> > >What are they exactly?
> > >
> > >Paul at Port Macquarie
> > >
> > >
> > > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> > > To unsubscribe from aussie-weather send e-mail
> to:majordomo at world.std.com
> > > with "unsubscribe aussie-weather your_email_address" in the body of
> your
> > > message.
> > > -----------------------jacob at iinet.net.au------------------------------
> > >
> > >
> > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> > To unsubscribe from aussie-weather send e-mail
> to:majordomo at world.std.com
> > with "unsubscribe aussie-weather your_email_address" in the body of your
> > message.
> > -----------------------jacob at iinet.net.au------------------------------
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
----- End of forwarded message from Ben Quinn -----
--
------------------------------------------------------
Harald Richter
Postdoctoral Research Associate
Department of Earth and Atmospheric Sciences
State University of New York at Albany
1400 Washington Avenue
Albany, NY 12222
phone: (518) 442-4273 fax: (518) 442-4494
spatz at atmos.albany.edu
http://www.atmos.albany.edu/facstaff/spatz/spatz.html
------------------------------------------------------
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
002
From: wbc at ozemail.com.au (Laurier Williams)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Another Question
Date: Thu, 26 Aug 1999 14:30:09 GMT
X-Mailer: Forte Agent 1.5/32.452
X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id KAA14610
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
On Thu, 26 Aug 1999 17:27:59 +1000, Ben Quinn
wrote:
>Hey Grant, Matt, Everyone..
>
>>From memory gulf lines are what Matt Smith stated - Lines of
>convection/storms aligned N/S in northern Australia.. They often move
>from east to west in the Gulf of Carpentaria and the NT..
>
>I can't be 100% sure but i think Gulf Lines and The Morning Glory are
>two different things.. I just returned "The Australian Weather Book" to
>the local library after they started jumping up and down because i had
>it out for 4 months or something - It's a great book.. But if anyone has
>this book both Gulf Lines and The Morning Glory (If the are two
>different things) are explained very well in there..
>
>I found a sat pic of a Morning Glory in the Gulf of Carpentaria as
>well.. looks a bit different to the examples of Gulf Lines i've seen..
>
>http://www.dropbears.com/brough/satpic.htm
>
The full URL is
http://www.dropbears.com/brough/
worth exploring if you're interested in the rather unusual wx in the
Gulf.
--
Laurier Williams
Australian Weather Links and News
http://www.ozemail.com.au/~wbc/
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
003
From: wbc at ozemail.com.au (Laurier Williams)
To: aussie-weather at world.std.com
Subject: Re: Comments on Models - was "Re: aus-wx: Bureau policies"
Date: Thu, 26 Aug 1999 14:38:23 GMT
X-Mailer: Forte Agent 1.5/32.452
X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id KAA16454
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
On Thu, 26 Aug 1999 11:42:31 +1000, Michael Scollay
wrote:
>Now I'd love to compare these AVN/MRF results to equivalent BoM model
>data (LAPS, GASP). Presumably, obs data going into BoM models from BoM
>obs sites has been better filtered...
>
One would hope that the data going into the model is better filtered
than the public utterances from the Bureau, which still allow gross
errors in basic data, even after "quality control". I guess only the
ppl running the model can answer that.
However, QC is really a separate issue from the problems caused by
non-standard hours of observations.
--
Laurier Williams
Australian Weather Links and News
http://www.ozemail.com.au/~wbc/
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
004
From: wbc at ozemail.com.au (Laurier Williams)
To: aussie-weather at world.std.com
Subject: aus-wx: Sydney radar anomaly
Date: Thu, 26 Aug 1999 15:02:02 GMT
X-Mailer: Forte Agent 1.5/32.452
X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id LAA21425
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Speaking of the Mildura radar problems...
Sydney radar, for as long as it has been on the web, has exhibited a
discontinuity at the 110km radius. Have a look at
http://www.ozemail.com.au/~wbc/aussiewx/IDR033lp.gif, where I've place
an animation of the rainband sweeping in on Sydney from the WNW. Note
that most of it evaporates at 110km!
Any ideas? Even the concept of different vertical sweep angles being
invoked at longer radii doesn't account for it -- the observations
right now indicate that the rain is reaching the ground. I've emailed
the Bureau about this several times to elicit their thoughts, but have
so far not received a response.
--
Laurier Williams
Australian Weather Links and News
http://www.ozemail.com.au/~wbc/
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
005
From: wbc at ozemail.com.au (Laurier Williams)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Bureau policies
Date: Thu, 26 Aug 1999 14:52:44 GMT
X-Mailer: Forte Agent 1.5/32.452
X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id KAA19436
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
On Wed, 25 Aug 1999 10:26:09 +1000 (EST), Blair Trewin
wrote:
snip my earlier missive
>I'm not sure if I'd describe them as cynics; retaining a standard
>observation time for max/min temperatures is a fairly critical issue
>for climate. Moving the observation time to 2100 UTC (0700 EST, 0800
>EDT) would have meant a substantial reduction in mean minimum
>temperatures - in the 1-1.5 degree range at the worst-affected
>stations - as most cold nights were 'double-counted'.
>
Hi Blair. The 21z time has been mentioned before, though I can't see
why anyone would ever have considered it a potential replacement, for
all the reasons you mention. Given that fewer than 1% of stations
report only once daily, why do max and min have to be reported at the
one time? Most countries report them for separate, overlapped 24 hour
periods, which fits the actuality of their occurrence better.
>>From the climate viewpoint, continuity of practices through time
>is the most important issue - it is less important whether the
>observation time is consistent with other countries (or even with
>other states). From the synoptic meteorology point of view the
>reverse is true. (A change which affects an entire network is a
>particularly severe problem for climate, as there is no comparison
>data which can be used to assess the impact of the change).
>
I agree with your comments on continuity of practice. However, I would
be more convinced that the Bureau was similarly seized with the
desirability of this if it didn't (a) shift the whole observational
pattern with daylight saving, and (b) lump together very different
observational sites over the long term within many towns under the
title "Composite".
I've been told by Bureau people that the issue of standardising times
has been examined before but no changes made. Does anyone know if
there is any documented argument or justification for continuation or
against change? With wholesale site changes currently under way as
AWSs replace manned stations, I don't believe the continuity argument
alone is sufficient to justify an observational pattern that is not
only non-standard internally and internationally, but has many other
problems. It is an extraordinarily complex problem, and if any study
has been done of it, I'd love to see it.
There are at least five separate issues:
Different desirable criteria for climatic and synoptic purposes
The DST shift problem
Non-standard times both internationally and internally
The climatic day ends at 9am
The problem of setting a time(s) for observation which is both
climatically desirable and observationally practical (observers tend
not to like doing obs at midnight!)
>The proposed solution seems eminently sensible - there is no good
>reason why automatic stations can't send out observations at any
>time that is appropriate. (I don't think the time is too far away
>when we'll be routinely archiving data at hourly or finer resolutions).
>
Yes. It is surprising that this is not being done, given that AWSs
have been operational for over 10 years. However, I note that the
majority of the 129 stations listed to generate standard hour obs are
manned stations. Somewhat remarkably, most of the AWS will continue to
report SYNOPS at only the non-standard times.
>Note that only the Bureau-staffed stations have ever distributed
>synoptic data internationally as far as I know (they are certainly
>the only ones that distribute monthly climate data internationally).
>
While that's true for the international CLIMAT bulletins, which come
mostly from main airports with Bureau observers, the entire Australian
surface synoptic network is distributed internationally over the WMO
GTS. However, probably 65 or 70% of the stations are in bulletins
designated National or Regional distribution levels, even though they
are distributed internationally. I haven't done a count, but I'd guess
that around 40% of the observations in the first-order bulletins are
by Bureau staffers. The rest come from lighthouses, the wonderful Qld
PO network, isolated roadhouses, etc.
--
Laurier Williams
Australian Weather Links and News
http://www.ozemail.com.au/~wbc/
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
006
From: "Marty" [martyp at dynamite.com.au]
To: "Aussie Weather Mailing List" [aussie-weather at world.std.com]
Subject: aus-wx: 3D photos
Date: Fri, 27 Aug 1999 01:20:50 +1000
X-Mailer: Microsoft Outlook Express 4.72.3110.1
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi kids,
This is both completely weather-related and also blatant (albeit non-profit)
self-indulgent marketing propaganda!
In the past I took a few stereo photos of clouds from an airplane. I've recently
made a 3D photography web site, and bunged them on.
If you're unfamiliar with stereo photos, they're two photos taken from slightly
different perspectives (the distance between your eyes). When your merge them
together with your eyes, they produce a 3D image. (See Viewing Techniques on the
site for info on how to view them.)
http://www.bit.net.au/~erinm/3d
Cheers,
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
3D Photography: http://www.bit.net.au/~erinm/3d
ICQ: 11790565
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
007
Date: Fri, 27 Aug 1999 08:01:51 +1000
From: Ben Quinn [bodie at flatrate.net.au]
X-Mailer: Mozilla 4.61 [en] (Win95; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Sydney radar anomaly
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hey Laurier, Everyone..
Brisbane radar has had the same problem throughout winter.. with some
days being worse than others.. I couldn't really find a good example in
my radar archives, maybe someone else in Brisbane has a good example..
I too have called the BOM many times about it.. but no-one can really
provide a solid explanation of why it happens.. it is interesting that
it only appears to happen on the radar that we have on the web.. and not
on the higher resolution radar they have available at the BOM..
We have Mt Kanighan (Gympie) Radar north of Brisbane and Grafton Radar
south of Brisbane.. so the rain rate on the broad scale moisac
(spelling?) is generally the correct rain rate inside the 100km radius..
Laurier Williams wrote:
>
> Speaking of the Mildura radar problems...
>
> Sydney radar, for as long as it has been on the web, has exhibited a
> discontinuity at the 110km radius. Have a look at
> http://www.ozemail.com.au/~wbc/aussiewx/IDR033lp.gif, where I've place
> an animation of the rainband sweeping in on Sydney from the WNW. Note
> that most of it evaporates at 110km!
>
> Any ideas? Even the concept of different vertical sweep angles being
> invoked at longer radii doesn't account for it -- the observations
> right now indicate that the rain is reaching the ground. I've emailed
> the Bureau about this several times to elicit their thoughts, but have
> so far not received a response.
>
> --
> Laurier Williams
> Australian Weather Links and News
> http://www.ozemail.com.au/~wbc/
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
008
From: "Nick Sykes" [nsykes at labyrinth.net.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Good rain in Melbourne
Date: Fri, 27 Aug 1999 09:32:35 +1000
X-Mailer: Microsoft Outlook Express 5.00.2314.1300
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi all
There has been heavy rain in and around Melbourne, actually the whole of
Victoria really. My place received 38.3mm in the 24hr period, about 50mm so
far from this rain event. North of the ranges falls have been in the order
of 50-100mm. Flood warnings are current for numerous rivers (only
minor/moderate at this stage).
Drizzling here at the moment
Nick Sykes
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
009
Date: Fri, 27 Aug 1999 09:19:18 +1000
From: Anthony Cornelius [cyclone at flatrate.net.au]
X-Mailer: Mozilla 4.6 [en] (Win98; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Nice Mildura Radar
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi all,
Les Crossan wrote:
>
> Phil Bagust wrote:
>
> > If the air is warm and dry, could there be substantial evaporation losses
> > between what's coming out of the cloud and what's actually hitting the
> > ground??
>
> Huh??? If the air's warm and DRY surely there wouldn't be any precipitation
> for radar to measure!!!
I think Phil may be thinking of virga here Les. Sometimes the lower
levels can be dry, and rain will evaporate in this lower layer in a
phenomena called virga. This would explain why some weaker echo's don't
have precipitation at the surface, however 100mm/hr would never
evaporate! As there's just too much rain.
--
Anthony Cornelius
Queensland Coordinator of the Australian Severe Weather Association
(ASWA)
(07) 3390 4812
14 Kinsella St
Belmont, Brisbane
QLD, 4153
Please report severe thunderstorms on our Queensland severe thunderstorm
reporting line on (07) 3390 4218 or by going to our homepage at
http://www.severeweather.asn.au
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
010
Date: Fri, 27 Aug 1999 09:17:08 +1000
From: Anthony Cornelius [cyclone at flatrate.net.au]
X-Mailer: Mozilla 4.6 [en] (Win98; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Mildura radar is dodgy
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi All,
Mark Dwyer wrote:
I can't be totally correct about this but i think there is a
> calibration error on the Mildura radar at the moment that is causing the radar
> to over estimate some what.
Radar's are very sensitive, ideally they need to be re-caliberated under
each conditions, as attenuation can differ greatly in some areas. Quite
often, what happens is that the beam shoots too high in the cloud, and
gets more precip then their actually is (this could be the case, if
Mildura at the beginning of winter was adjusted to suit high base
conditions). But, with this system now, I'm assuming that the bases are
much lower, and thus the beams are effectively shooting too high than
they should.
There are a variety of other factors that play a part in this, such as
the presence of mountains etc.
To my knowledge, radars in the US are caliberated each day to suit the
different conditions. My guess is that Mildura radar is not nearly
attended to this often.
--
Anthony Cornelius
Queensland Coordinator of the Australian Severe Weather Association
(ASWA)
(07) 3390 4812
14 Kinsella St
Belmont, Brisbane
QLD, 4153
Please report severe thunderstorms on our Queensland severe thunderstorm
reporting line on (07) 3390 4218 or by going to our homepage at
http://www.severeweather.asn.au
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
011
Date: Fri, 27 Aug 1999 10:12:39 +1000
From: Anthony Cornelius [cyclone at flatrate.net.au]
X-Mailer: Mozilla 4.6 [en] (Win98; I)
X-Accept-Language: en
To: Australian Weather Mailing List [aussie-weather at world.std.com]
Subject: aus-wx: Storm Chasing vs Fuel
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi all,
I know this isn't directly related to weather, but it is related to
storm chasing. I've often considering buying a 5L tin, and filling it
with petrol (in case when you're out in the country, I should ever run
short). I was also thinking of suggesting this to everyone who was going
to attend the ASWA end of year chase. But some one reminded me about
the possibility of fuel sitting in the boot, and in the hot Sun....does
anyone know if fuel under these conditions would be in danger of
spontaneously combusting?
Thanks,
--
Anthony Cornelius
Queensland Coordinator of the Australian Severe Weather Association
(ASWA)
(07) 3390 4812
14 Kinsella St
Belmont, Brisbane
QLD, 4153
Please report severe thunderstorms on our Queensland severe thunderstorm
reporting line on (07) 3390 4218 or by going to our homepage at
http://www.severeweather.asn.au
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
012
From: peter.corlett at doi.vic.gov.au
X-Lotus-FromDomain: DOI
To: aussie-weather at world.std.com
Date: Fri, 27 Aug 1999 10:37:26 +1000
Subject: Re: aus-wx: Storm Chasing vs Fuel
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Anthony,
As long as you keep the fuel in a metal container with a
strong, well-sealed cap there should be no problem. Its the petrol vapour that
is really dangerous. I'd keep the container out of direct sunlight though! I've
have kept petrol in a tin like this for weeks in summer with no problems, and I
eventually did need to use it.
The expensive option would be to get a diesel 4wd and fit it with a second tank.
Cheers,
Pete
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
013
From: "Dane Newman" [dpn at bigpond.com]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Good rain in Melbourne
Date: Fri, 27 Aug 1999 10:11:50 +1000
X-Mailer: Microsoft Outlook Express 4.72.3110.1
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Yeah Nick we had 26.6mm here in Kilsyth in the 24 hours to 9am, heaviest
suburban falls were 52mm at Springvale and 50mm at Glen Waverly the city had
36mm. Dane Newman.
-----Original Message-----
>Hi all
>
>There has been heavy rain in and around Melbourne, actually the whole of
>Victoria really. My place received 38.3mm in the 24hr period, about 50mm so
>far from this rain event. North of the ranges falls have been in the order
>of 50-100mm. Flood warnings are current for numerous rivers (only
>minor/moderate at this stage).
>
>Drizzling here at the moment
>
>Nick Sykes
>
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
014
From: "Jane ONeill" [cadence at rubix.net.au]
To: "Aussie Weather" [aussie-weather at world.std.com]
Subject: aus-wx: Melbourne rain
Date: Fri, 27 Aug 1999 11:08:25 +1000
X-Mailer: Microsoft Outlook Express 5.00.2014.211
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Dandenong Creek had broken its banks by 7.30 last night in a big way. I'll
go for a walk along the Yarra up at Dights Falls at lunchtime and see how
much water has got into the river system by then. Many gutters in the inner
suburbs simply didn't cope with the runoff and overflowed - in 6 years I
can't remember driving through so much water along the lower areas of
Whitehorse Road through Kew & Balwyn.
Bayswater had 35mm in the 24 hours to 7am this morning - the majority fell
during the late afternoon and early evening.
No thunder in Abbotsford yesterday (unlike some lucky people ) - just
good soaking rain.
Jane ONeill
ASWA - Victoria
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
015
X-Originating-IP: [210.8.232.3]
From: "Patrick Tobin" [pdtobin at hotmail.com]
To: aussie-weather at world.std.com
Subject: aus-wx: Canberra rain
Date: Thu, 26 Aug 1999 17:58:23 PDT
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi all,
Received 29.5mm in the 24 hours to 8.00 am this morning (when
I go out to work!!). Very welcome by all except the snow lovers.
This would have fallen as rain in the Alps. Canberra had a
warm min of 10C.
There appeared to be some storm potential yesterday through
the morning and early afternoon but that was killed off by
the advance of the thickening middle layer cloud band.
At 10.50am (27/8/99)we currently have very heavy drizzle,
visibility of 750-1000m and a cloud base of around 100m
above ground level. Interesting that the radar currently
shows no precipitation for around 100km radius from
Canberra.
On the subject of radar, I can't recall ever seeing
precipitation over the Snowy Mtns region - even though
there are areas that receive 2,000-3,000mm pa. Its a
pity that there isn't a radar site somewhere high on
the Great Dividing Range in southern NSW. There must
be quite a few radar holes along the length of the
Divide. Something else for the storm chasers to keep
in mind later this year.
Patrick
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
016
Date: Fri, 27 Aug 1999 11:21:53 +1000
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Upcoming SEQ Weather
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Ross Portas wrote:
>
> Well, AVN really does have some interesting weather happening for us
> over the next few days. For those who haven't yet looked:
> http://www.arl.noaa.gov/data/ready/usr/64805.arlplot.gif
Hey people chasing this link out there - Just remember that the above
plot is deleted from READY after a certain period of time that could
be as little as 1/2 hr. I think they run a cron job every hour to clean
up those plots generated by users who have not been active in the
last 15 minutes. So you might jump onto the above link only to find
that it has vanished!
Michael Scollay mailto:michael.scollay at telstra.com.au
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
017
Date: Fri, 27 Aug 1999 11:13:59 +1000
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Recent Mallee weather
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Blair Trewin wrote:
>
> > Overnight we recorded some more heavy showers and just now (9.20 a.m.) the
> > skies are getting much darker to the NW and I spied a number of burgeoning
> > cumulus to the west before the cloud set in again. The latest satpic looks
> > promising for more rain today (from the NW) and i wouldn't be at all
> > surprised if the Mildura radar isn't showing something already!
>
> The Mildura radar is going ballistic - but given previous posts I
> don't take it all that seriously. They were reporting a thunderstorm
> at 0900, and have reported 3mm in the hour since.
Maybe someone's having a chuckle out there about all these
weather-net-heads seeing decent storms when none exist! Possibly,
all that's happened is that some blighter turned the gain up too
high on the Mildura radar. This may be Blair's turn to push for
radar calibration standards:-)
Michael Scollay mailto:michael.scollay at telstra.com.au
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
018
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: aus-wx: met course (fwd)
To: aussie-weather at world.std.com (Aussie Weather)
Date: Fri, 27 Aug 1999 12:01:57 +1000 (EST)
X-Mailer: ELM [version 2.4 PL23]
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
The following is the ad for the 2000 Bureau of Meteorology training
course, which is the basic route into the Bureau. It may be of
interest to some of you.
I believe the intake will be 28, which is by some margin the largest
for many years (the 1999 course had 10 external people, and in quite
a few recent years there has been no external intake at all) - in
other words it's the best opportunity for some time (although I'd
expect quite a few big courses in the coming years as the existing
staff retire in droves - so don't give up the ghost if you aren't old
enough yet).
I'm not sure if it's a prescribed qualification or not, but to stand
a realistic chance you will need an honours-level degree (or be doing
honours this year) with a fairly substantial component in maths and/
or physics (specific meteorology courses at university are less
important, although they won't do any harm).
Blair Trewin
> PERMANENT VACANCIES
> The following vacancies are expected to appear in the Gazette
> of 26 August 1999. Applications addressing the selection
> criteria should be forwarded to the Recruitment Officer,
> Bureau of Meteorology, GPO BOX 1289K, Melbourne 3001, no later
> than 17 September 1999.
>
> APS LEVEL 3 TO 5 (PO 1) $33566 - $42791, BUREAU OF METEOROLOGY
> TRAINING CENTRE, EXECUTIVE AND INTERNATIONAL AFFAIRS BRANCH,
> HEAD OFFICE (SEVERAL POSITIONS)
>
> DUTIES: Undertake a course of training in theory and practice
> in meteorology.
>
> ELIGIBILITY/OTHER REQUIREMENTS: Prescribed eligibility
> requirements apply.
>
> Contact Officer for enquiries is Philip Riley on (03) 9669 4530.
> Selection documentation can be obtained from (03) 9669 4200 or
> (03) 9669 4081 (24 hour answering service) or by emailing
> campaign at bom.gov.au leaving your name and postal address.
> Information and selection documentation can be viewed at
> http://www.bom.gov.au/info/careers/
>
> Applications MUST be lodged on the Bureau's official
> application form.
>
> NOTE:
> - On successful completion of training Meteorologists are
> posted to the Bureau's Regional Offices in capital cities.
> Shiftwork is involved. Selection is subject to passing a
> medical examination to certify fitness for service in remote
> and/or tropical areas.
>
>
> ===================================================
> Dr Gary Weymouth
> Bureau of Meteorology * BMTC +61 - 3 9669 4105 (leave message)
> BMTC fax +61 - 3 9669 4366
> BMRC +61 - 3 9669 4110 (mainly AH)
> BMRC fax +61 - 3 9669 4660
> email: G.Weymouth at bom.gov.au home: 9886 6739
> ===================================================
> Opinions expressed in this email are those of the author, and do not
> necessarily represent official Australian Bureau of Meteorology policy.
>
>
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
019
X-Sender: halden at mail.lis.net.au
X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32)
Date: Fri, 27 Aug 1999 14:07:15 +1000
To: cadence at rubix.net.au
From: Halden Boyd [halden at lis.net.au]
Subject: aus-wx: Re: How to get PCA Charts Easy
Cc: aussie-weather at world.std.com
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hiya Jane..........
Goto this site............
http://www.airservices.gov.au/about/aboutfr.htm
and go to the bottom of the page and it will show you that the PCA can be
bought individually for just over $5.
HOWEVER>>>>>>>>>>if you go to the Air Services page I have indicated in the
ASWA "Members Update" you will discover that the PCA chart is basically
that which is on the yellow map of Australia at the head of the AFOR
briefings.
If you take a stab at the area you want to chase in or whatever have a look
and it will list all of the airports within the area boundary.
Planning Chart Australia would be a very handy document for chasers to have
in their cars.......and as I said to you before I will posting a "Dektalk"
guide in the members arena very soon.
To order a PCA thru Airservices Publications Centre call toll free
1300-306630......or Melbourne (03) 94322000...........they take Mastercard
and will post it to you.
Cheers Halden Boyd :-)
At 03:18 PM 8/26/99 +1000, you wrote:
>Does anyone have a URL where I can find PCA (Planning Chart Australia)
>charts online - the airservices.gov.au site doesn't seem to & I'm after one
>for Victoria.....
>
>Thanks
>Jane ONeill
>Bayswater
>ASWA - Victoria
>
>
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
>
>
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
020
Date: Fri, 27 Aug 1999 13:54:02 +1000
From: Ben Quinn [bodie at flatrate.net.au]
X-Mailer: Mozilla 4.61 [en] (Win95; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: aus-wx: SE QLD/NE NSW Storms
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hey Ben from Brisbane here..
Well we currently have some mostly weak and isolated showers and storms
developing over SE QLD and NE NSW.. It feels GREAT to come home and see
lightning on the tracker!! Around 150 hits in the past 45 mins or so..
but only 20 or 30 whites on it at any one time.. they are only just
developing though!
That low in VIC/NSW is spectacular on the navy sats!
Blair Trewin wrote:
>
> The following is the ad for the 2000 Bureau of Meteorology training
> course, which is the basic route into the Bureau. It may be of
> interest to some of you.
>
> I believe the intake will be 28, which is by some margin the largest
> for many years (the 1999 course had 10 external people, and in quite
> a few recent years there has been no external intake at all) - in
> other words it's the best opportunity for some time (although I'd
> expect quite a few big courses in the coming years as the existing
> staff retire in droves - so don't give up the ghost if you aren't old
> enough yet).
>
> I'm not sure if it's a prescribed qualification or not, but to stand
> a realistic chance you will need an honours-level degree (or be doing
> honours this year) with a fairly substantial component in maths and/
> or physics (specific meteorology courses at university are less
> important, although they won't do any harm).
>
> Blair Trewin
>
> > PERMANENT VACANCIES
> > The following vacancies are expected to appear in the Gazette
> > of 26 August 1999. Applications addressing the selection
> > criteria should be forwarded to the Recruitment Officer,
> > Bureau of Meteorology, GPO BOX 1289K, Melbourne 3001, no later
> > than 17 September 1999.
> >
> > APS LEVEL 3 TO 5 (PO 1) $33566 - $42791, BUREAU OF METEOROLOGY
> > TRAINING CENTRE, EXECUTIVE AND INTERNATIONAL AFFAIRS BRANCH,
> > HEAD OFFICE (SEVERAL POSITIONS)
> >
> > DUTIES: Undertake a course of training in theory and practice
> > in meteorology.
> >
> > ELIGIBILITY/OTHER REQUIREMENTS: Prescribed eligibility
> > requirements apply.
> >
> > Contact Officer for enquiries is Philip Riley on (03) 9669 4530.
> > Selection documentation can be obtained from (03) 9669 4200 or
> > (03) 9669 4081 (24 hour answering service) or by emailing
> > campaign at bom.gov.au leaving your name and postal address.
> > Information and selection documentation can be viewed at
> > http://www.bom.gov.au/info/careers/
> >
> > Applications MUST be lodged on the Bureau's official
> > application form.
> >
> > NOTE:
> > - On successful completion of training Meteorologists are
> > posted to the Bureau's Regional Offices in capital cities.
> > Shiftwork is involved. Selection is subject to passing a
> > medical examination to certify fitness for service in remote
> > and/or tropical areas.
> >
> >
> > ===================================================
> > Dr Gary Weymouth
> > Bureau of Meteorology * BMTC +61 - 3 9669 4105 (leave message)
> > BMTC fax +61 - 3 9669 4366
> > BMRC +61 - 3 9669 4110 (mainly AH)
> > BMRC fax +61 - 3 9669 4660
> > email: G.Weymouth at bom.gov.au home: 9886 6739
> > ===================================================
> > Opinions expressed in this email are those of the author, and do not
> > necessarily represent official Australian Bureau of Meteorology policy.
> >
> >
>
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
021
From: "Dr David Jones" [ie at world.std.com]
Organization: Bureau of Meteorology
To: aussie-weather-digest at world.std.com
Date: Fri, 27 Aug 1999 10:56:23 +0000
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7BIT
Subject: comments on models..
Reply-To: d.jones at BoM.GOV.AU
Priority: normal
Just a few comments to add to Michael's email about the MRF model -
comment which may be a little disjointed, but there are many issues
here.
First regarding the analysis step. There is no "single" way that this
is done across forecast models and the details are exceptionally
escoteric, but as a general guide this is done by using the last
forecast as a first guess to the current atmospheric state, and this
is then modified using available obs. Ideally this process should be
done continuously. The difference of the obs from the forecast (the
obs increments) modify the forecast field on the basis of known
statistical error characteristics of the forecast model, and of the
observations. The influence of the observations is dependent on these
observational error - so for temperature this is typically set at
~~0.5C, and also their error of representativeness. This latter error
is rather nebulous, but represents the error caused by the
missrepresentation of the small scales by the observational network.
A simple example of the error of representativess is the case of
two stations 20km apart. Imagine a storm passes
between the stations dropping 50mm of rain.
Based on our two observations the analysis would be flat with zero
rainfall everywhere, when infact this should show 50mm between the
two stations. Both observations are correct, but the information they
provide is misleading. This is what is meant by errors of
representativeness, and this error must also be taken into account
when using observations.
Anyway, you find that the errors of representativeness associated
with surface temperature observations are very large, so these are
generally not used when generating model analyses, as the information
they provide is usually inferior to the model guess itself. That is
the timing of Australian surface temp obs has none or at most
negligible impact on the models - this is because these data are not
used, or if they are they are given a very small weight, recognizing
their large errors of representativeness. For those who don't believe
these are poor, consider Melbourne as an example. Imagine we used the
Coldstream obs (essentially the same elevation as Melbourne but ~40km
east) to analyses the Melbourne CBD minimum temperature in winter.
This would often give errors of >10C - you would be better to use
climatology. Of course we wouldn't do this because we know that
Coldstream is not representative of Melbourne CBD.. but in many
places you do not know this, or equivalently you have just one ob in
a very large area, and effectively this observation provides almost
no useful information to a model about what the true temperature
distribution is... As an aside, if the observation were useful, the
se need not be on standard times as all models allow a window
(usually some hours) for the inclusion of observations in the
analysis step anyway.
Another issue is that weather prediction models do not (usually) use
screen level temperature as a prognostic variable. The lowest model
level is usually >10m above the ground, while the surface temperature
is calculated using "quite" well understood energy balance
considerations.
Back to the issue of Snowy Mt temperatures, the resolution of the AVN
model in this regions is ~100km so effectively the Snowy Mt's are
little more than a topographical pimple, probably peaking at less
than 1000m in the model. Effectively the point observation in the
Snowy Mt's have a very large error of representativeness - they are
for points at >1400m when the model box is ~1000m. The model is
forecasting the temp for this box, and comparison of the model
forecasts should be against observed 100x100 km grid boxes.
The errors of representativeness impact on the analysis, in that the
observations provide little information about what the average
100x100km box temperature is at the start of the model run, and also
when using the forecast. As the models get higher and higher
resolution the model grid boxes more closely approximate points (the
last LAPS is running at 12.5x12.5 km), but even now the most general
method for using model forecasts at points is to down scale these
using humans and/or statistical techniques.
I hope this clears up a little confusion..
David.
________
Dr David Jones ( ___)
( )
Climate Group () )
Bureau of Meteorology ( ) )
Research Centre Fax : (+61 3) 9669 4660 ( )__ )
GPO Box 1289K, Melbourne Ph (work): (+61 3) 9669 4440 (________)_)
Victoria 3001, Australia Ph (home): (+61 3) 9898 4425 .... ..
email : D.Jones at bom.gov.au .... ..
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
022
From: "James Chambers" [jamestorm at ozemail.com.au]
To: "aus-wx" [aussie-weather at world.std.com]
Subject: aus-wx: Updated N NSW Severe T'storm Advice
Date: Fri, 27 Aug 1999 15:24:27 +1000
X-Mailer: Microsoft Outlook Express 4.72.3110.1
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 1425 on Friday the 27th of August 1999
This advice affects people in the following weather districts:
Northern Rivers
Northern Tablelands,
North West Slopes and Plains
Thunderstorms are forecast within the advice area until 8pm. At 2.20pm,
widespread thunderstorm activity was occurring over the area; thunderstorms
are moving from the west. Some of these are expected to be severe, bringing
large hailstones, destructive winds and very heavy rainfall.
James Chambers
The Brisbane & SE Qld Storm Site
http://www.ozemail.com.au/~jamestorm/bristorm.html
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
023
Date: Fri, 27 Aug 1999 15:33:57 +1000
From: Ben Quinn [bodie at flatrate.net.au]
X-Mailer: Mozilla 4.61 [en] (Win95; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: aus-wx: Hailstorms?
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hey, Ben again..
I will not make too many posts this afternoon.. but there is a storm SW
of Gatton (in Central SE QLD - WSW of Brisbane) that has had red in it
on radar for the past 30 mins.. and dosn't look like dying in a hurry
either.. Given the time of the year, i think there is a strong
possibility of hail in this storm and any strong storms that develope
thisafternoon..
Although the storm is very very isolated and not really much to look at
on radar, i am saving tracker + radar and will upload it to the web
later on this afternoon/tonight for those that are not around to watch
it in realtime..
Ben Quinn wrote:
>
> Hey Ben from Brisbane here..
>
> Well we currently have some mostly weak and isolated showers and storms
> developing over SE QLD and NE NSW.. It feels GREAT to come home and see
> lightning on the tracker!! Around 150 hits in the past 45 mins or so..
> but only 20 or 30 whites on it at any one time.. they are only just
> developing though!
>
> That low in VIC/NSW is spectacular on the navy sats!
>
> Blair Trewin wrote:
> >
> > The following is the ad for the 2000 Bureau of Meteorology training
> > course, which is the basic route into the Bureau. It may be of
> > interest to some of you.
> >
> > I believe the intake will be 28, which is by some margin the largest
> > for many years (the 1999 course had 10 external people, and in quite
> > a few recent years there has been no external intake at all) - in
> > other words it's the best opportunity for some time (although I'd
> > expect quite a few big courses in the coming years as the existing
> > staff retire in droves - so don't give up the ghost if you aren't old
> > enough yet).
> >
> > I'm not sure if it's a prescribed qualification or not, but to stand
> > a realistic chance you will need an honours-level degree (or be doing
> > honours this year) with a fairly substantial component in maths and/
> > or physics (specific meteorology courses at university are less
> > important, although they won't do any harm).
> >
> > Blair Trewin
> >
> > > PERMANENT VACANCIES
> > > The following vacancies are expected to appear in the Gazette
> > > of 26 August 1999. Applications addressing the selection
> > > criteria should be forwarded to the Recruitment Officer,
> > > Bureau of Meteorology, GPO BOX 1289K, Melbourne 3001, no later
> > > than 17 September 1999.
> > >
> > > APS LEVEL 3 TO 5 (PO 1) $33566 - $42791, BUREAU OF METEOROLOGY
> > > TRAINING CENTRE, EXECUTIVE AND INTERNATIONAL AFFAIRS BRANCH,
> > > HEAD OFFICE (SEVERAL POSITIONS)
> > >
> > > DUTIES: Undertake a course of training in theory and practice
> > > in meteorology.
> > >
> > > ELIGIBILITY/OTHER REQUIREMENTS: Prescribed eligibility
> > > requirements apply.
> > >
> > > Contact Officer for enquiries is Philip Riley on (03) 9669 4530.
> > > Selection documentation can be obtained from (03) 9669 4200 or
> > > (03) 9669 4081 (24 hour answering service) or by emailing
> > > campaign at bom.gov.au leaving your name and postal address.
> > > Information and selection documentation can be viewed at
> > > http://www.bom.gov.au/info/careers/
> > >
> > > Applications MUST be lodged on the Bureau's official
> > > application form.
> > >
> > > NOTE:
> > > - On successful completion of training Meteorologists are
> > > posted to the Bureau's Regional Offices in capital cities.
> > > Shiftwork is involved. Selection is subject to passing a
> > > medical examination to certify fitness for service in remote
> > > and/or tropical areas.
> > >
> > >
> > > ===================================================
> > > Dr Gary Weymouth
> > > Bureau of Meteorology * BMTC +61 - 3 9669 4105 (leave message)
> > > BMTC fax +61 - 3 9669 4366
> > > BMRC +61 - 3 9669 4110 (mainly AH)
> > > BMRC fax +61 - 3 9669 4660
> > > email: G.Weymouth at bom.gov.au home: 9886 6739
> > > ===================================================
> > > Opinions expressed in this email are those of the author, and do not
> > > necessarily represent official Australian Bureau of Meteorology policy.
> > >
> > >
> >
> > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> > with "unsubscribe aussie-weather your_email_address" in the body of your
> > message.
> > -----------------------jacob at iinet.net.au------------------------------
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
024
From: "James Chambers" [jamestorm at ozemail.com.au]
To: "aus-wx" [aussie-weather at world.std.com]
Subject: aus-wx: SE QLD warning
Date: Fri, 27 Aug 1999 15:54:26 +1000
X-Mailer: Microsoft Outlook Express 4.72.3110.1
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi all
A very nice thunderstorm just S of Gatton...and guess what? There's a
warning:
TOP PRIORITY
SEVERE THUNDERSTORM WARNING
Issued by the Bureau of Meteorology, Brisbane
at 3:33pm EST on Friday the 27th of August 1999
For the Southeast Coast
Thunderstorms with hail were observed in the western part of the district
moving slowly eastward. The storms are expected to affect areas west of the
Gold
coast and outside the Brisbane metropolitan area this afternoon.
People are advised to secure outside items, move cars under cover and seek
shelter.
The next warning will be issued at 4.30 pm.
Regards
James Chambers
The Brisbane & SE Qld Storm Site
http://www.ozemail.com.au/~jamestorm/bristorm.html
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
025
X-Sender: halden at mail.lis.net.au
X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32)
Date: Fri, 27 Aug 1999 16:07:52 +1000
To: aussie-weather at world.std.com
From: Halden Boyd [halden at lis.net.au]
Subject: Re: aus-wx: SE QLD/NE NSW Storms
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hi Ben......
I just took off to the airport as a roll cloud formed here....was gonna
take pics from the plane but it disappated and started raining.....there
have been a few claps of thunder from sheet lightning at Evans Head at this
time...steady rain too about 10mm/hr
Halden
At 01:54 PM 8/27/99 +1000, you wrote:
>Hey Ben from Brisbane here..
>
>Well we currently have some mostly weak and isolated showers and storms
>developing over SE QLD and NE NSW.. It feels GREAT to come home and see
>lightning on the tracker!! Around 150 hits in the past 45 mins or so..
>but only 20 or 30 whites on it at any one time.. they are only just
>developing though!
>
>That low in VIC/NSW is spectacular on the navy sats!
>
>Blair Trewin wrote:
>>
>> The following is the ad for the 2000 Bureau of Meteorology training
>> course, which is the basic route into the Bureau. It may be of
>> interest to some of you.
>>
>> I believe the intake will be 28, which is by some margin the largest
>> for many years (the 1999 course had 10 external people, and in quite
>> a few recent years there has been no external intake at all) - in
>> other words it's the best opportunity for some time (although I'd
>> expect quite a few big courses in the coming years as the existing
>> staff retire in droves - so don't give up the ghost if you aren't old
>> enough yet).
>>
>> I'm not sure if it's a prescribed qualification or not, but to stand
>> a realistic chance you will need an honours-level degree (or be doing
>> honours this year) with a fairly substantial component in maths and/
>> or physics (specific meteorology courses at university are less
>> important, although they won't do any harm).
>>
>> Blair Trewin
>>
>> > PERMANENT VACANCIES
>> > The following vacancies are expected to appear in the Gazette
>> > of 26 August 1999. Applications addressing the selection
>> > criteria should be forwarded to the Recruitment Officer,
>> > Bureau of Meteorology, GPO BOX 1289K, Melbourne 3001, no later
>> > than 17 September 1999.
>> >
>> > APS LEVEL 3 TO 5 (PO 1) $33566 - $42791, BUREAU OF METEOROLOGY
>> > TRAINING CENTRE, EXECUTIVE AND INTERNATIONAL AFFAIRS BRANCH,
>> > HEAD OFFICE (SEVERAL POSITIONS)
>> >
>> > DUTIES: Undertake a course of training in theory and practice
>> > in meteorology.
>> >
>> > ELIGIBILITY/OTHER REQUIREMENTS: Prescribed eligibility
>> > requirements apply.
>> >
>> > Contact Officer for enquiries is Philip Riley on (03) 9669 4530.
>> > Selection documentation can be obtained from (03) 9669 4200 or
>> > (03) 9669 4081 (24 hour answering service) or by emailing
>> > campaign at bom.gov.au leaving your name and postal address.
>> > Information and selection documentation can be viewed at
>> > http://www.bom.gov.au/info/careers/
>> >
>> > Applications MUST be lodged on the Bureau's official
>> > application form.
>> >
>> > NOTE:
>> > - On successful completion of training Meteorologists are
>> > posted to the Bureau's Regional Offices in capital cities.
>> > Shiftwork is involved. Selection is subject to passing a
>> > medical examination to certify fitness for service in remote
>> > and/or tropical areas.
>> >
>> >
>> > ===================================================
>> > Dr Gary Weymouth
>> > Bureau of Meteorology * BMTC +61 - 3 9669 4105 (leave message)
>> > BMTC fax +61 - 3 9669 4366
>> > BMRC +61 - 3 9669 4110 (mainly AH)
>> > BMRC fax +61 - 3 9669 4660
>> > email: G.Weymouth at bom.gov.au home: 9886 6739
>> > ===================================================
>> > Opinions expressed in this email are those of the author, and do not
>> > necessarily represent official Australian Bureau of Meteorology policy.
>> >
>> >
>>
>> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
>> with "unsubscribe aussie-weather your_email_address" in the body of your
>> message.
>> -----------------------jacob at iinet.net.au------------------------------
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
>
>
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
026
From: "John Graham" [gorzzz at optusnet.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Storm Chasing vs Fuel
Date: Fri, 27 Aug 1999 16:58:01 +1000
X-Mailer: Microsoft Outlook Express 5.00.2014.211
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
----- Original Message -----
From: Anthony Cornelius [cyclone at flatrate.net.au]
To: Australian Weather Mailing List [aussie-weather at world.std.com]
Sent: Friday, August 27, 1999 10:12 AM
Subject: aus-wx: Storm Chasing vs Fuel
> Hi all,
>
> I know this isn't directly related to weather, but it is related to
> storm chasing. I've often considering buying a 5L tin, and filling it
> with petrol (in case when you're out in the country, I should ever run
> short). I was also thinking of suggesting this to everyone who was going
> to attend the ASWA end of year chase. But some one reminded me about
> the possibility of fuel sitting in the boot, and in the hot Sun....does
> anyone know if fuel under these conditions would be in danger of
> spontaneously combusting?
>
> Thanks,
> --
> Anthony Cornelius
Not so much as in spontaneously combusting, but the pressure buildup inside
the can.......it would make a hell of a mess, not to mention the fire
hazard....(anyone for a light????)
John from Ballina
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
027
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: aus-wx: Dissapointing Illawarra - but models had it right
Date: Fri, 27 Aug 1999 17:16:40 +1000
X-Mailer: Microsoft Outlook Express 5.00.2014.211
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Barely 1mm of rain overnight here. The models all indicated that most rain
would be concentrated in Victoria, inland NSW and coastal NSW north of the
Hunter and that is how it went.
There is still the outside chance of a shower this evening as some weak Cu
is building in the clearer air behind the cloud mass, but to be frank I
doubt they will survive the trip over the escarpment.
Michael Thompson
http://thunder.simplenet.com
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
028
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Sydney radar anomaly
Date: Fri, 27 Aug 1999 17:03:19 +1000
X-Mailer: Microsoft Outlook Express 5.00.2014.211
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
I have noticed this before too.
Michael
> Speaking of the Mildura radar problems...
>
> Sydney radar, for as long as it has been on the web, has exhibited a
> discontinuity at the 110km radius. Have a look at
> http://www.ozemail.com.au/~wbc/aussiewx/IDR033lp.gif, where I've place
> an animation of the rainband sweeping in on Sydney from the WNW. Note
> that most of it evaporates at 110km!
>
> Any ideas? Even the concept of different vertical sweep angles being
> invoked at longer radii doesn't account for it -- the observations
> right now indicate that the rain is reaching the ground. I've emailed
> the Bureau about this several times to elicit their thoughts, but have
> so far not received a response.
>
> --
> Laurier Williams
> Australian Weather Links and News
> http://www.ozemail.com.au/~wbc/
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
>
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
029
From: "Dane Newman" [dpn at bigpond.com]
To: [aussie-weather at world.std.com]
Subject: aus-wx: 4 day Press Chart (http://www.bom.gov.au/products/IDG00V56.shtml)
Date: Fri, 27 Aug 1999 16:52:39 +1000
X-Mailer: Microsoft Outlook Express 4.72.3110.1
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Just discovered this new 4 day forecast Chart on BOM homepage. Btw drizzle here all day in Kilsyth 5.2mm since 9am, 8.4mm in the city. Dane
http://www.bom.gov.au/products/IDG00V56.shtml
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
030
From: "Michael Thompson" [michaelt at ozemail.com.au]
To: [aussie-weather at world.std.com]
Subject: Re: aus-wx: Storm Chasing vs Fuel
Date: Fri, 27 Aug 1999 17:09:17 +1000
X-Mailer: Microsoft Outlook Express 5.00.2014.211
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
To be perfectly honest the areas we will be travelling are not the outback,
towns are generally less than 100km apart, petrol stations rarely 50 kms
apart. Use sensible precautions such as filling a days beginning ( or
lunch ) and I cannot see a problem.
To get fuel to combust requires air and a source of ignition, I doubt the
sun would make it hot enough to be spontaneous, and to combust you would
need a leaking can as well.
Michael
> I know this isn't directly related to weather, but it is related to
> storm chasing. I've often considering buying a 5L tin, and filling it
> with petrol (in case when you're out in the country, I should ever run
> short). I was also thinking of suggesting this to everyone who was going
> to attend the ASWA end of year chase. But some one reminded me about
> the possibility of fuel sitting in the boot, and in the hot Sun....does
> anyone know if fuel under these conditions would be in danger of
> spontaneously combusting?
>
> Thanks,
> --
> Anthony Cornelius
> Queensland Coordinator of the Australian Severe Weather Association
> (ASWA)
> (07) 3390 4812
> 14 Kinsella St
> Belmont, Brisbane
> QLD, 4153
> Please report severe thunderstorms on our Queensland severe thunderstorm
> reporting line on (07) 3390 4218 or by going to our homepage at
> http://www.severeweather.asn.au
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
>
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
031
Date: Fri, 27 Aug 1999 17:32:57 +1000
From: Andrew Puddifer [andypudd at backmeup.net.au]
X-Mailer: Mozilla 4.05 (Macintosh; I; PPC)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Storm Chasing vs Fuel
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hey everyone,
In regards fuel sitting in the boot....it would be quite safe unless there was a leak in the tin.The plastic containers
available for fuel are a much better proposition ...I would suggest that 10 litres is a better amount to carry anyway,
especially in the country. Also, it is a good idea to use the fuel in the container occasionally, as it has a tendency
to go off after a while.
Regards,
Andrew Puddifer.
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
032
Date: Fri, 27 Aug 1999 17:31:19 +1000
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: aus-wx: Re: comments on models - was "Re:" - no subject...
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
David Hart wrote:
for Dr. David Jones on Fri, 27 Aug 1999 00:18:14 -0400 (EDT):
[snip]
> Date: Fri, 27 Aug 1999 10:56:23 +0000
[snip]
> Subject: comments on models..
> Reply-To: d.jones at BoM.GOV.AU
[snip]
> Just a few comments to add to Michael's email about the MRF model -
[snip]
> That is the timing of Australian surface temp obs has none or at most
> negligible impact on the models ...
That's good to know David...This means that I can focus my
correction efforts upon inward/outward radiation factors etc.
In particular, I wonder how this might vary according to
altitude in my case in question? Any formulae?
> ... As an aside, if the observation were useful, the
> se need not be on standard times as all models allow a window
> (usually some hours) for the inclusion of observations in the
> analysis step anyway.
If this be the case, would there not be some corrective formulae
applied that took a 9am obs in Eastern Australia during winter
and worked out what it might be at the model analysis run 00Z
or 10am EST. My original point is that it is important when
a min/max is recorded, if not to set extreme cases in a more
sophisticated future synoptic model. I accept that this might
not be the case for the models of today. I also would expect
that "normalisation" of all input data is very important, thus
a "window" is not a good representation of what goes on within
that window. Let's say the window is 3pm to 9am. A mean of
temperature might be OK for a rough model run, but the night
extreme is really important from the outgoing radiation
perspective, particularly in aussie snow-country where it
can mean a -2C difference to predicted with snow instead
of rain falling.
> ...
> Another issue is that weather prediction models do not (usually)
> use screen level temperature as a prognostic variable. The lowest
> model level is usually >10m above the ground, while the surface
> temperature is calculated using "quite" well understood energy
> balance considerations.
Any pointers to references concerning how a surface temperature
is determined will be greatly appreciated by yours truely.
> Back to the issue of Snowy Mt temperatures, the resolution of
> the AVN model in this regions is ~100km so effectively the
> Snowy Mt's are little more than a topographical pimple, probably
> peaking at less than 1000m in the model.
Height assumption for the AVN grid position under Perisher Valley
varies between the extremes of 768m and 782m. This was determined
using a rough-as-guts linear-interplotation that worked out the
height per mb from "Sea-Level" to 850mb, then calculating the
surface height from the surface pressure given.
As an aside, NCEP states that AVN(00 to +72hrs)/MRF(00 to +168hrs)
are worked at the T126 version (about 105km) with MRF(+180 to
+288hrs) worked at T62 (about 200km).
> Effectively the point observation in the Snowy Mt's have a very
> large error of representativeness - they are for points at >1400m
> when the model box is ~1000m. The model is forecasting the temp
> for this box, and comparison of the model forecasts should be
> against observed 100x100 km grid boxes.
I've found that temperature corrections for Perisher's altitude
are comparatively easy and reliable. It's far worse for
precipitation corrections since topography, wind direction etc.
have a profound affect on precipition recorded when applied to
a lift over 2100m when compared to the model assumption of ~775m.
I've had some success with a statistically-based corrective
algorithm but I am seeking a better set of formulae to apply
based around fundamentals e.g. parcel theory application.
> The errors of representativeness impact on the analysis, in
> that the observations provide little information about what
> the average 100x100km box temperature is at the start of the
> model run, and also when using the forecast.
Periodicy of model run is important also. AVN is better at 6hrs
since it goes some of the way toward providing some better diurnal
temperature range, for example. MRF at 12hrs is less effective.
In the longer term 3hr increments would be more ideal. That would
then syncronise with probable temperature minimum and maximum
periods in a typical day. All dreams, I'm afraid:-)
> As the models get higher and higher resolution the model grid
> boxes more closely approximate points (the last LAPS is running
> at 12.5x12.5 km), but even now the most general method for using
> model forecasts at points is to down scale these using humans
> and/or statistical techniques.
That's what I do, but it's coarse at 105km x 105km in comparison
LAPS at 16x that resolution. How I would love to get my scripts
onto LAPS data to compare! What we need is a READY-like LAPS/GASP
site! (hint, hint...).
> I hope this clears up a little confusion...
Thanks David...Yes, but it also raises more questions!
P.S. David, you may want to check your mailer as it is sending
wierd addresses. Thanks to David Hart for sending David's reply
back onto the list...
,-_|\ Michael Scollaymailto:michael.scollay at telstra.com.au
/ASWA \ mailto:michael.scollay at telstra.com.au
\_,^._/ Treasurer, ASWA Inc.
v http://www.severeweather.asn.au/
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
033
Date: Fri, 27 Aug 1999 12:29:42 +1000
From: Michael Scollay [michael.scollay at telstra.com.au]
Organization: Telstra Strategy & Research
X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 5.5.1 sun4m)
X-Accept-Language: en
To: Aussie Weather [aussie-weather at world.std.com]
Subject: aus-wx: Gulgong 9am Obs?
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Geez, someone must have tipped a bucket of water into the Gulgong
rain guage. Is this figure believable Blair? From the 9am obs...
http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDO31N01.html
=================================================================
STATIONS CLD WIND TEMP [C] BAR hPa RAIN WEATHER
km/h d d m m g 24hr
r e a i r
y w x n
-----------------------------------------------------------------
Bathurst 8 CALM 9 8 18 7 7 8 Rain
Bathurst AWS NE 22 9 8 17 6 1019 10 Recent precip.
Gulgong 8 W 2 10 9 21 9 246 Rain
Katoomba 8 NW 4 7 6 17 7 4 Rain
Lithgow 8 NW 4 8 7 19 7 8 Rain
Mt Boyce AWS W 26 6 6 16 6 3
Mudgee AP AWS W 11 9 7 21 9 1018 26 Recent precip.
...
=================================================================
Michael Scollay mailto:michael.scollay at telstra.com.au
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
034
From: Blair Trewin [blair at met.Unimelb.EDU.AU]
Subject: Re: aus-wx: Gulgong 9am Obs?
To: aussie-weather at world.std.com
Date: Fri, 27 Aug 1999 19:15:46 +1000 (EST)
X-Mailer: ELM [version 2.4 PL23]
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
>
> Geez, someone must have tipped a bucket of water into the Gulgong
> rain guage. Is this figure believable Blair? From the 9am obs...
>
> http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDO31N01.html
>
> =================================================================
> STATIONS CLD WIND TEMP [C] BAR hPa RAIN WEATHER
> km/h d d m m g 24hr
> r e a i r
> y w x n
> -----------------------------------------------------------------
> Bathurst 8 CALM 9 8 18 7 7 8 Rain
> Bathurst AWS NE 22 9 8 17 6 1019 10 Recent precip.
> Gulgong 8 W 2 10 9 21 9 246 Rain
> Katoomba 8 NW 4 7 6 17 7 4 Rain
> Lithgow 8 NW 4 8 7 19 7 8 Rain
> Mt Boyce AWS W 26 6 6 16 6 3
> Mudgee AP AWS W 11 9 7 21 9 1018 26 Recent precip.
> ...
> =================================================================
>
> Michael Scollay mailto:michael.scollay at telstra.com.au
Very probably 24.6. This happens occasionally.
Blair
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
035
Date: Fri, 27 Aug 1999 19:49:14 +1000
From: Ben Quinn [bodie at flatrate.net.au]
X-Mailer: Mozilla 4.61 [en] (Win95; I)
X-Accept-Language: en
To: aussie-weather at world.std.com
Subject: Re: aus-wx: SE QLD/NE NSW Storms
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
Hey Halden, Everyone..
Well we had some pretty nasty storms here in SE QLD late this
afternoon.. there was red in a storm west of Brisbane for over 2 hours
on radar! I have never seen red in a storm for that length of time.. and
get this.. THere are unofficial reports of 12 inches of hail covering
the New England Highway west of Brisbane.. completely blocking it
causing traffic chaos..
I have put together a 5 hour event loop from 12:30pm this afternoon to
5:30pm.. this loop shows the storms that had max intensity in them for
over 2 hours..
http://www.bsch.simplenet.com/27-08-99/hailstorms.htm
I will also add the lightning tracker images and satellite pics to the
above URL later on..
Storms have continued into the evening (small storm still going NW of
Brisbane at 7:45 with lightning 3-4 seconds apart - up to 147 whites on
the tracker at one stage).. but they're generally on the way out..
Halden Boyd wrote:
>
> Hi Ben......
> I just took off to the airport as a roll cloud formed here....was gonna
> take pics from the plane but it disappated and started raining.....there
> have been a few claps of thunder from sheet lightning at Evans Head at this
> time...steady rain too about 10mm/hr
> Halden
>
> At 01:54 PM 8/27/99 +1000, you wrote:
> >Hey Ben from Brisbane here..
> >
> >Well we currently have some mostly weak and isolated showers and storms
> >developing over SE QLD and NE NSW.. It feels GREAT to come home and see
> >lightning on the tracker!! Around 150 hits in the past 45 mins or so..
> >but only 20 or 30 whites on it at any one time.. they are only just
> >developing though!
> >
> >That low in VIC/NSW is spectacular on the navy sats!
> >
> >Blair Trewin wrote:
> >>
> >> The following is the ad for the 2000 Bureau of Meteorology training
> >> course, which is the basic route into the Bureau. It may be of
> >> interest to some of you.
> >>
> >> I believe the intake will be 28, which is by some margin the largest
> >> for many years (the 1999 course had 10 external people, and in quite
> >> a few recent years there has been no external intake at all) - in
> >> other words it's the best opportunity for some time (although I'd
> >> expect quite a few big courses in the coming years as the existing
> >> staff retire in droves - so don't give up the ghost if you aren't old
> >> enough yet).
> >>
> >> I'm not sure if it's a prescribed qualification or not, but to stand
> >> a realistic chance you will need an honours-level degree (or be doing
> >> honours this year) with a fairly substantial component in maths and/
> >> or physics (specific meteorology courses at university are less
> >> important, although they won't do any harm).
> >>
> >> Blair Trewin
> >>
> >> > PERMANENT VACANCIES
> >> > The following vacancies are expected to appear in the Gazette
> >> > of 26 August 1999. Applications addressing the selection
> >> > criteria should be forwarded to the Recruitment Officer,
> >> > Bureau of Meteorology, GPO BOX 1289K, Melbourne 3001, no later
> >> > than 17 September 1999.
> >> >
> >> > APS LEVEL 3 TO 5 (PO 1) $33566 - $42791, BUREAU OF METEOROLOGY
> >> > TRAINING CENTRE, EXECUTIVE AND INTERNATIONAL AFFAIRS BRANCH,
> >> > HEAD OFFICE (SEVERAL POSITIONS)
> >> >
> >> > DUTIES: Undertake a course of training in theory and practice
> >> > in meteorology.
> >> >
> >> > ELIGIBILITY/OTHER REQUIREMENTS: Prescribed eligibility
> >> > requirements apply.
> >> >
> >> > Contact Officer for enquiries is Philip Riley on (03) 9669 4530.
> >> > Selection documentation can be obtained from (03) 9669 4200 or
> >> > (03) 9669 4081 (24 hour answering service) or by emailing
> >> > campaign at bom.gov.au leaving your name and postal address.
> >> > Information and selection documentation can be viewed at
> >> > http://www.bom.gov.au/info/careers/
> >> >
> >> > Applications MUST be lodged on the Bureau's official
> >> > application form.
> >> >
> >> > NOTE:
> >> > - On successful completion of training Meteorologists are
> >> > posted to the Bureau's Regional Offices in capital cities.
> >> > Shiftwork is involved. Selection is subject to passing a
> >> > medical examination to certify fitness for service in remote
> >> > and/or tropical areas.
> >> >
> >> >
> >> > ===================================================
> >> > Dr Gary Weymouth
> >> > Bureau of Meteorology * BMTC +61 - 3 9669 4105 (leave message)
> >> > BMTC fax +61 - 3 9669 4366
> >> > BMRC +61 - 3 9669 4110 (mainly AH)
> >> > BMRC fax +61 - 3 9669 4660
> >> > email: G.Weymouth at bom.gov.au home: 9886 6739
> >> > ===================================================
> >> > Opinions expressed in this email are those of the author, and do not
> >> > necessarily represent official Australian Bureau of Meteorology policy.
> >> >
> >> >
> >>
> >> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> >> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> >> with "unsubscribe aussie-weather your_email_address" in the body of your
> >> message.
> >> -----------------------jacob at iinet.net.au------------------------------
> > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> > To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> > with "unsubscribe aussie-weather your_email_address" in the body of your
> > message.
> > -----------------------jacob at iinet.net.au------------------------------
> >
> >
>
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
> To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
> with "unsubscribe aussie-weather your_email_address" in the body of your
> message.
> -----------------------jacob at iinet.net.au------------------------------
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
--------------------------------------------------------------------------------------
036
From: wbc at ozemail.com.au (Laurier Williams)
To: aussie-weather at world.std.com
Subject: Re: aus-wx: Gulgong 9am Obs?
Date: Fri, 27 Aug 1999 13:01:02 GMT
X-Mailer: Forte Agent 1.5/32.452
X-MIME-Autoconverted: from quoted-printable to 8bit by europe.std.com id JAA18869
Sender: aussie-weather-approval at world.std.com
Reply-To: aussie-weather at world.std.com
On Fri, 27 Aug 1999 19:15:46 +1000 (EST), Blair Trewin
wrote:
>>
>> Geez, someone must have tipped a bucket of water into the Gulgong
>> rain guage. Is this figure believable Blair? From the 9am obs...
>>
>> http://www.bom.gov.au/cgi-bin/wrap_fwo.pl?IDO31N01.html
>>
>> =================================================================
>> STATIONS CLD WIND TEMP [C] BAR hPa RAIN WEATHER
>> km/h d d m m g 24hr
>> r e a i r
>> y w x n
>> -----------------------------------------------------------------
>> Bathurst 8 CALM 9 8 18 7 7 8 Rain
>> Bathurst AWS NE 22 9 8 17 6 1019 10 Recent precip.
>> Gulgong 8 W 2 10 9 21 9 246 Rain
>> Katoomba 8 NW 4 7 6 17 7 4 Rain
>> Lithgow 8 NW 4 8 7 19 7 8 Rain
>> Mt Boyce AWS W 26 6 6 16 6 3
>> Mudgee AP AWS W 11 9 7 21 9 1018 26 Recent precip.
>> ...
>> =================================================================
>>
>> Michael Scollay mailto:michael.scollay at telstra.com.au
>
>Very probably 24.6. This happens occasionally.
>
You're right, Blair. A late correction from Gulgong came through with
25mm.
Laurier
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
To unsubscribe from aussie-weather send e-mail to:majordomo at world.std.com
with "unsubscribe aussie-weather your_email_address" in the body of your
message.
-----------------------jacob at iinet.net.au------------------------------
| Document: 990827.htm
Updated: 09 September 1999 |
[Australian Severe Weather index] [Copyright Notice] [Email Contacts] |