Here is a summary of the latest NWP output for noon on Thursday. Issued
0515z, 13 August 2006.

The models show low pressure crossing England and Wales towards the weekend,
bringing rain to many areas of the UK. Beyond that things are less certain,
but GFS is keen to bring in warmer air aloft along with a westerly flow.

ECMWF: http://85.214.49.20/pics/Recm1201.gif
Low pressure lies to the SSW, leading to easterlies and ESE'lies over
England and Wales. Elsehwere winds are NE'lies, with high pressure to the
west. The low fills and moves NE'wards over the UK at T+144, bringing
SW'lies to southern and eastern areas and NE'lies across Scotland, Northern
Ireland and northern England. By T+168 the low lies over the North Sea,
leaving the UK under a mixture of northerlies and NW'lies.

MetO: http://85.214.49.20/pics/Rukm1201.gif
The Met Office run brings easterlies across the UK, again with a low to the
SSW. The low fills over the UK with light winds for all at T+144.

GFS: http://expert.weatheronline.co.uk/pslv_frame.htm
Easterlies and ENE'lies cover the majority of the UK with low pressure to
the SSW. The low fills and moves NE'wards over East Anglia at T+144, leaving
northerlies and NW'lies in its wake. By T+168 a mobile westerly flow and a
weak ridge cover the UK.

GEM: http://meteocentre.com/models/glb00_120.html
Unavailable at time of issue.

JMA: http://85.214.49.20/pics/Rjma1201.gif
The Japanese run shows a large low centred over the West Country, with
easterlies for much of the UK as a result.

NOGAPS: http://85.214.49.20/pics/Rngp1201.gif
ESE'lies and easterlies cover the UK with low pressure centred to the SW.

Darren Prescott wrote:
Here is a summary of the latest NWP output for noon on Thursday. Issued
0515z, 13 August 2006.

The models show low pressure crossing England and Wales towards the weekend,
bringing rain to many areas of the UK. Beyond that things are less certain,
but GFS is keen to bring in warmer air aloft along with a westerly flow.

I can't get on with these maps at all. They are eeeyuch. Anyway, what
is the definition of Low in the event of the NAO being negative?

What with an heatwave; the power of the low is diminished or it it that
there is an anticyclonic effect holding it off where under more normal
conditions, the anticyclone would probably be the weaker.

"Weatherlawyer" wrote in message
oups.com...

Darren Prescott wrote:
Here is a summary of the latest NWP output for noon on Thursday. Issued
0515z, 13 August 2006.

The models show low pressure crossing England and Wales towards the
weekend,
bringing rain to many areas of the UK. Beyond that things are less
certain,
but GFS is keen to bring in warmer air aloft along with a westerly flow.

I can't get on with these maps at all. They are eeeyuch. Anyway, what
is the definition of Low in the event of the NAO being negative?

What with an heatwave; the power of the low is diminished or it it that
there is an anticyclonic effect holding it off where under more normal
conditions, the anticyclone would probably be the weaker.

Keh?