Here's a question for anyone. What sort of daytime maximum temperatures are
we looking at if we have sub 510 air in East Anglia and the Midlands?
--
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Gavin Staples.

website updated regularly
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For the latest lecture in the Darwin Lecture Series in Cambridge, please
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"Gavin Staples" wrote in message
...

Here's a question for anyone. What sort of daytime maximum temperatures
are
we looking at if we have sub 510 air in East Anglia and the Midlands?
--
Gavin Staples.

Hi Gavin,

A lot of other factors must be taken into consideration, but I'll let
the more learned explain those.

However, there are some interesting 12z soundings to use as
examples from today. At Kolpasevo, Siberia (29231) the thickness
was measured at 520dm, but with a surface temperature of
MS21.5 deg C.

At Rostov (34731), Russian Federation, the thickness was 531dm
with a surface temperature of 0.2 deg C.

I assume you are talking about the solution the 06z DT GFS model
has given for later next week. The NE wind is likely to be bring in
air which is very unstable to sea temperatures. With a thickness
around 516dm, in this situation, I would think it difficult to find
temperatures above freezing point, away from coasts.

HTH, Joe

.... as noted elsewhere, the 500-1000 hPa thickness values are poor
indicators of surface temperatu they are useful tracers of the bulk
movement of air but for refined surface forecasting, use 850-1000hPa
partial thicknesses, or regression from ThetaW/ThetaE or adjustment of
the 850hPa actual temperature. Even these need to be used with extreme
care under conditions of a marked low-level inversion, where cold
under-cutting is taking places as the 850hPa level (circa 1500m asl) may
not be truly representative of the near-surface conditions.

Back in 1958, Boyden published in Met.Mag an analysis of *mean* screen
temperature for various 500-1000hPa values: the mean was of the 09Z
minimum and 21Z maximum. Using the (rather small) graph in the old
Forecasters' Reference Book gives:
528 dam: +1degC
522 dam: 0 degC
516 dam: -2 degC
510 dam: -4 degC.

I haven't got access to the original article, but I imagine some comment
was made regarding snow cover.

Martin.

Hi Gavin,

As you probably know it depends on time of year/cloud
amount/precipitation/fetch/snow-cover, previous night's min etc.

However, at this time of year, given no snow-cover, clear skies in a
northerly, I would suggest it struggles to get above freezing inland.

Given snow-cover, cloud-cover and snowfall in a northerly, then a few
degrees below.

Cheers

John Hammond


"Gavin Staples" wrote in message
...

Here's a question for anyone. What sort of daytime maximum temperatures
are
we looking at if we have sub 510 air in East Anglia and the Midlands?
--

************************************************** **************************
************************************************** *
Gavin Staples.

website updated regularly
www.gavinstaples.com

For the latest lecture in the Darwin Lecture Series in Cambridge, please
click on my site, and then click on the Darwin Lecture series link.

"I have friends in overalls whose friendship I would not swap for the
favor
of the kings of the world". ~Thomas A. Edison


All outgoing emails are checked for viruses by Norton Internet Security
Professional 2004.


************************************************** **************************
************************************************** **

"John Hammond" wrote in message
...
Hi Gavin,

As you probably know it depends on time of year/cloud
amount/precipitation/fetch/snow-cover, previous night's min etc.

However, at this time of year, given no snow-cover, clear skies in a
northerly, I would suggest it struggles to get above freezing inland.

Given snow-cover, cloud-cover and snowfall in a northerly, then a few
degrees below.

Cheers

John Hammond


"Gavin Staples" wrote in message
...

Here's a question for anyone. What sort of daytime maximum temperatures
are
we looking at if we have sub 510 air in East Anglia and the Midlands?
--


************************************************** **************************
************************************************** *
Gavin Staples.

website updated regularly
www.gavinstaples.com

For the latest lecture in the Darwin Lecture Series in Cambridge, please
click on my site, and then click on the Darwin Lecture series link.

"I have friends in overalls whose friendship I would not swap for the
favor
of the kings of the world". ~Thomas A. Edison


All outgoing emails are checked for viruses by Norton Internet Security
Professional 2004.



************************************************** **************************
************************************************** **



Hey is that really you John Boy (Shinfield Park 1997 along with Hudson and
Helen Willetts?)

Trevor Appleton






-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

Certainly is Trevor.
How's it going? What you up to?



"Trevor Appleton" trevor@nospamweatherdot4dinternetdocodotuk wrote in
message ...

"John Hammond" wrote in message
...
Hi Gavin,

As you probably know it depends on time of year/cloud
amount/precipitation/fetch/snow-cover, previous night's min etc.

However, at this time of year, given no snow-cover, clear skies in a
northerly, I would suggest it struggles to get above freezing inland.

Given snow-cover, cloud-cover and snowfall in a northerly, then a few
degrees below.

Cheers

John Hammond


"Gavin Staples" wrote in message
...

Here's a question for anyone. What sort of daytime maximum
temperatures
are
we looking at if we have sub 510 air in East Anglia and the Midlands?
--



************************************************** **************************
************************************************** *
Gavin Staples.

website updated regularly
www.gavinstaples.com

For the latest lecture in the Darwin Lecture Series in Cambridge,
please
click on my site, and then click on the Darwin Lecture series link.

"I have friends in overalls whose friendship I would not swap for the
favor
of the kings of the world". ~Thomas A. Edison


All outgoing emails are checked for viruses by Norton Internet
Security
Professional 2004.




************************************************** **************************
************************************************** **



Hey is that really you John Boy (Shinfield Park 1997 along with Hudson and
Helen Willetts?)

Trevor Appleton






-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

....
Certainly is Trevor.
How's it going? What you up to?

Full-time Countryside Access Officer and part-time Broadcast Meteorologist
(Weatherquest/BBC local radio), living back where I was born in East
Yorkshire





"Trevor Appleton" trevor@nospamweatherdot4dinternetdocodotuk wrote in
message ...

"John Hammond" wrote in message
...
Hi Gavin,

As you probably know it depends on time of year/cloud
amount/precipitation/fetch/snow-cover, previous night's min etc.

However, at this time of year, given no snow-cover, clear skies in a
northerly, I would suggest it struggles to get above freezing inland.

Given snow-cover, cloud-cover and snowfall in a northerly, then a few
degrees below.

Cheers

John Hammond


"Gavin Staples" wrote in message
...

Here's a question for anyone. What sort of daytime maximum
temperatures
are
we looking at if we have sub 510 air in East Anglia and the
Midlands?
--




************************************************** **************************
************************************************** *
Gavin Staples.

website updated regularly
www.gavinstaples.com

For the latest lecture in the Darwin Lecture Series in Cambridge,
please
click on my site, and then click on the Darwin Lecture series link.

"I have friends in overalls whose friendship I would not swap for
the
favor
of the kings of the world". ~Thomas A. Edison


All outgoing emails are checked for viruses by Norton Internet
Security
Professional 2004.





************************************************** **************************
************************************************** **



Hey is that really you John Boy (Shinfield Park 1997 along with Hudson
and
Helen Willetts?)

Trevor Appleton






-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----






-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----