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Old November 23rd 03, 08:49 AM posted to uk.sci.weather
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Default A chilly night in the north

Minima (weatheronline)

Carlisle -9°
Altnaharra -7°
Redesdale Camp -6°
Aboyne -6°
Topcliffe -6°
Tees-Side -6°
Lossiemouth -5°
Aviemore -5°
Aberdeen/Dyce -5°
Leeming -5°



--
Paul


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Old November 23rd 03, 09:17 AM posted to uk.sci.weather
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Default A chilly night in the north

Those figures appear a little extreme. I am only 10 miles to the East of
Carlisle and only recorded -0.8c !!
--
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Brampton N.E. Cumbria 117m ASL
Climatological Station 7076

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"Paul C" wrote in message
...
Minima (weatheronline)

Carlisle -9°
Altnaharra -7°
Redesdale Camp -6°
Aboyne -6°
Topcliffe -6°
Tees-Side -6°
Lossiemouth -5°
Aviemore -5°
Aberdeen/Dyce -5°
Leeming -5°



--
Paul



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Old November 23rd 03, 10:36 AM posted to uk.sci.weather
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Default A chilly night in the north

In article , Paul Crabtree
writes
Those figures appear a little extreme. I am only 10 miles to the East of
Carlisle and only recorded -0.8c !!


The weather man on the Frost program (!) this morning repeated the
Carlisle temperature.

--
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Old November 23rd 03, 10:54 AM posted to uk.sci.weather
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Default A chilly night in the north

"Paul C" wrote in message
...
Minima (weatheronline)

Carlisle -9°


and -5C yesterday morning

Well done the much-maligned Met Office computer-generated forecast
of -7C to -9C for Penrith (see post "Weekend min temp" from Calum on
21st)

ATB,

--
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830ft
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(MO climat. site updated before 10Z and 19Z daily)
kencookATcopleydurham.freeserve.co.uk



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Old November 23rd 03, 11:11 AM posted to uk.sci.weather
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Default A chilly night in the north

In article ,
Five Cats writes:
In article , Paul Crabtree
writes
Those figures appear a little extreme. I am only 10 miles to the East of
Carlisle and only recorded -0.8c !!


The weather man on the Frost program (!) this morning repeated the
Carlisle temperature.

Could the Carlisle figure have been reported with a decimal point
misplaced?
--
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those who divide people into two categories and those who don't


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Old November 23rd 03, 11:51 AM posted to uk.sci.weather
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Default A chilly night in the north

In article , Ken Cook kencook@copley
durham.freeserve.co.uk writes
"Paul C" wrote in message
...
Minima (weatheronline)

Carlisle -9°


and -5C yesterday morning

Well done the much-maligned Met Office computer-generated forecast
of -7C to -9C for Penrith (see post "Weekend min temp" from Calum on
21st)

ATB,


The min of -9c at Carlisle looks a bit suspicious to me.

The hourly temperatures reported were

2300 1.7c
0000 1.8c
0100 0.2c
0200 -0.5c
0300 -1.9c
0400 -0.7c
0500 -5.4c
0600 temperature not reported
0700 no report
0800 1.1c

In the 0600 SYNOP the only item reported was the minimum temperature of
-8.8c. Everything else in the SYNOP was missing.

The temperature of -5.4c in the 0500 SYNOP looks wrong. The MSL pressure
reported at 0500 was 922.4 mb which is obviously wrong. The pressure
tendency at 0500 was reported as falling 56.6 mb in 3 hours, also
obviously wrong.

It looks to me as if the instrumentation threw a bit of a wobbly.

Norman.
--
Norman Lynagh Weather Consultancy
Chalfont St. Giles
Buckinghamshire E-mail:

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Old November 23rd 03, 11:54 AM posted to uk.sci.weather
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Default A chilly night in the north


"Ken Cook" wrote in message
...
"Paul C" wrote in message
...
Minima (weatheronline)

Carlisle -9°


and -5C yesterday morning

Well done the much-maligned Met Office computer-generated forecast
of -7C to -9C for Penrith (see post "Weekend min temp" from Calum on
21st)

.... remarkable, if correct: the EGNC first METAR has a temperature of
0C - a dramatic rise from an overnight min of -9degC! Doesn't appear to
tie in with WeatherOnline's own plots of minima in that part of the
world either.

If you want to see a crass automated output - have a look at the Met
Office index page and the symbol chart showing sunshine and showers for
the southeast: I am looking out at a grey, misty downpour - sunshine not
on offer.

Martin.


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Old November 23rd 03, 12:13 PM posted to uk.sci.weather
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Default A chilly night in the north

"Norman Lynagh" nospam@nospam.? wrote in message
...
The min of -9c at Carlisle looks a bit suspicious to me.


Hi, Norman,

Could well be - a lot of AWS are, but the screen min at Copley was
below -2C and we are on a hillside not noted for low minima. I estimate
Copley Mill would have been below -6C as were Topcliffe, Redesdale and
Teesside airport.

I stick by my suggestion that the computer forecast was not as bad as it
was thought to be.

ATB,

--
Ken Cook, Copley (5miles north of Barnard Castle), County Durham.
830ft
http://mysite.freeserve.com/copley
(MO climat. site updated before 10Z and 19Z daily)
kencookATcopleydurham.freeserve.co.uk


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Old November 23rd 03, 12:33 PM posted to uk.sci.weather
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Default A chilly night in the north

In article , Ken Cook kencook@copley
durham.freeserve.co.uk writes
"Norman Lynagh" nospam@nospam.? wrote in message
...
The min of -9c at Carlisle looks a bit suspicious to me.


Hi, Norman,

Could well be - a lot of AWS are, but the screen min at Copley was
below -2C and we are on a hillside not noted for low minima. I estimate
Copley Mill would have been below -6C as were Topcliffe, Redesdale and
Teesside airport.

I stick by my suggestion that the computer forecast was not as bad as it
was thought to be.


I've also had a look at the Carlisle SYNOPs for the previous night, when
Carlisle reported a min of -5.0c. That also looks wrong. The hourly
temperatures and MSL pressures reported we


2200 3.5c 1007.3 mb
2300 3.5c 1003.1 mb
0000 -1.0c missing
0100 -0.3c 964.8 mb
0200 1.4c 996.4 mb
0300 SYNOP reported with all items missing
0400 0.7c 970.8 mb
0500 2.3c missing
0600 SYNOP reported with all items missing
except minimum of -5.0c
0700 SYNOP reported with all items missing
0800 4.1c missing

It certainly looks as if the Carlisle AWS is pushing out some spurious
values from time to time.

Norman.
--
Norman Lynagh Weather Consultancy
Chalfont St. Giles
Buckinghamshire

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Old November 23rd 03, 01:30 PM posted to uk.sci.weather
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Default A chilly night in the north

On Sun, 23 Nov 2003 11:51:15 +0000, Norman Lynagh wrote in

snip
The min of -9c at Carlisle looks a bit suspicious to me.

The hourly temperatures reported were

2300 1.7c
0000 1.8c
0100 0.2c
0200 -0.5c
0300 -1.9c
0400 -0.7c
0500 -5.4c

snip

Very suspicious as you write, Norman. Assuming conditions were fairly
constant through the night (cloud cover, wind, etc.) it is most improbable
there was a drop of 4.7 deg C between 0400 and 0500 - a time in the night
when the rate of cooling has usually reached its minimum.

--
Mike Coleraine posted to uk.sci.weather 23/11/2003 13:30:09 UTC
My aurora images here http://www.mtullett.plus.com/29a-oct and
http://www.mtullett.plus.com/20-nov/


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