Here is a summary of the latest NWP output for noon on Saturday. Issued
0550, 17 Jan 06.

The models are split today. The minor ones show a mobile setup with
westerlies or SW'lies and rain for all at times. ECM, MetO and GFS instead
show a NW/SE split with high pressure keeping things settled for much of
England and Wales. Assuming the "big three" are correct, England and Wales
would thus see lower temperatures than Northern Ireland and Scotland, which
would remain under more of a maritime influence.
Beyond that things are less certain, not least due to a large chunk of very
cold air to our NE. GFS brings that cold air across the UK in spectacular
style (-18C 850s and 500dam air for Kent by T+300). As you'd expect, it was
a complete outlier with its temperatures, but a small number of ensemble
members show a similar evolution.

ECMWF: http://217.160.75.104/pics/Recm1201.gif
A weak ridge covers the UK, bringing a mixture of westerlies and WSW'lies.
Much the same is true at T+144, followed by southerlies at T+168 as pressure
rises to the east.

MetO: http://217.160.75.104/pics/Rukm1201.gif
MetO brings a ridge over England and Wales with light winds there. Elsewhere
winds are SW'lies, followed by similar conditions at T+144.

GFS: http://217.160.75.104/pics/Rtavn1201.png
A large high covers England, Wales and France. This leads to light winds
over England and Wales, with SW'lies for Scotland and Northern Ireland.
There's little change at T+144, but by T+168 winds become SE'lies and
southerlies for England and Wales as the high merges with a larger high to
the east. Scotland lies under SW'lies and Northern Ireland is affected by
southerlies.

GEM: http://meteocentre.com/models/glb00_120.html
The Canadian run shows SW'lies for all, with the UK between a high to the SE
and low pressure to the NW.

GME/DWD:
http://www.wetter.com/home/img/sat/g...160000_120.gif
Unavailable today.

JMA: http://217.160.75.104/pics/Rjma1201.gif
The Japanese run shows an area of high pressure over Biscay, with westerlies
as a result across the UK. The winds become a mixture of westerlies and
WSW'lies at T+144 as the high moves eastwards.

NOGAPS: http://217.160.75.104/pics/ngp10.prp.120.europeg.gif
NOGAPS shows strong westerlies with a similar synoptic setup to JMA.

KMA: http://www.kma.go.kr/kma03/gif/g21nh_smsr_120.gif
As with JMA and NGP, the Korean run shows strong westerlies across the UK
with high pressure to the south.