Here is a summary of the NWP output for noon on Wednesday.
Issued 0537, 29th March 2008

High pressure will increasingly affect the UK in the latter half of the
working week, with most areas seeing some settled weather for a time. There
are signs the high will retrogress towards the weekend, potentially bringing
a cooler pulse of air over the UK.

Analysis and evolution to T+120 via GFS
http://85.214.49.20/pics/Rtavn001.png
Low pressure lies to the north with WSW'lies across the UK. Tomorrow winds
become SSW'lies and southerlies as a secondary low deepens to the west. On
MOnday the secondary low moves eastwards and fills, bringing light winds to
much of the UK. Tuesday sees SW'lies ahead of a trough over Ireland.

T+120 synopsis
http://85.214.49.20/pics/Rtavn12015.png /
http://85.214.49.20/pics/Rtavn1201.png
http://85.214.49.20/pics/Rukm1201.gif
http://85.214.49.20/pics/Recm1201.gif /
http://www.meteociel.fr/modeles/nogapse_cartes.php
The jetstream chart shows a ridge to the west and a marked trough NNE of the
Azores. At the 500hPa level there's a ridhe to the west and a strong upper
NNW'ly flow over the UK. MetO has a NW'ly gradient instead with less of a
ridge to the west, while ECM brings upper WNW'lies with a weak ridge to the
west. GEM brings upper WNW'lies with a weak ridge as per ECM.
At the surface GFS brings a ridge over Ireland, with NNW'lies and NW'lies
for the UK. MetO has WNW'lies for all with high pressure to the SW, while
ECM has the high to the south and westerlies for all. GEM is similar to ECM,
with a high over Biscay and westerlies for all.

Evolution to T+168
Westerlies and WNW'lies cover the UK on day 6 with ECM as the result of high
pressure to the SSW. High pressure covers SW England on day 7, beinging
light winds across the UK.
Day 6 with GFS shows a ridge over the UK with light winds for all. The high
moves westwards on day 7, leading to NW'lies.

Looking further afield
Day 8 with ECM shows low pressure to the north and SW'lies over the UK. Day
9 sees the low move eastwards, allowing northerlis and NW'lies to affect
Scotland and Northern Ireland, with a col elsewhere. Day 10 has a ridge from
the NW over the UK, with light winds for most.
On day 8 GFS shows high pressure to the NW and northerlies as a result.
NNE'lies cover the UK on day 9 as the high persists to the WNW. By day 10
the high moves westwards, leaving a ridge over the UK. NE'lies cover England
and Wales with westerlies for Scotland and Northern Ireland.

Ensemble analysis
(http://91.121.94.83/modeles/gens/gra...ille=Lon dres)
The ensemblesshow a "sine wave" pattern for 3 days, followed by several days
of mild air aloft and no rain. Thereafter, there's a 50/50 split between a
continuation of mild temperatures aloft and a much colder spell.