Here is a summary of the NWP output for noon on Sunday.
Issued 0525, 26th March 2008

The first half of the working week looks unsettled for many, with low
pressure or a trough crossing the UK. Into the latter half of the week there
are signs of a brief settled interlude, as a ridge moves in from the west.

Analysis and evolution to T+120 via GFS
http://85.214.49.20/pics/Rtavn001.png
A col covers the UK, with a trough west of Scotland. Tomorrow the trough
crosses the UK, with SE'lies for Scotland and westerlies elsewhere. On
Friday a low deepens to the west, with southerlies fro all. The low persists
on Saturday, with strong to gale force SW'lies over the UK.

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 strong jet across the North Atlantic, with the
UK under a trough. At the 500hPa level there's a ridge to the west and upper
NW'lies. MetO has a trough to the west and upper SW'lies and ECM brings
SW'lies as well. GEM has an upper trough over Scotland, with westerlies
elsewhere.
At the surface GFS brings low pressure over the North Sea and to the north.
NE'lies are the result, with lighter winds and a weak trough over northern
Scotland. MetO has westerlies for all, with complex low pressure to the NW,
north and NE of the UK. ECM has a low centred to the NW, leading to SW'lies
for all. GEM brings a trough over Scotland and strong westerlies elsewhere.

Evolution to T+168
A deep low covers the UK on day 6 with ECM, bringing SW'ly gales to much of
England. Scotland lies under strong ENE'lies, Northern Ireland and Wales
under NW'lies. The low moves NE'wards and fills on Tuesday, leaving SW'lies
over the UK.
Day 6 with GFS shows a ridge crossing the UK, with a low to the WNW. SW'lies
and WSW'lies are the result, followed by NW'lies on day 7 from a low over
the North Sea.

Looking further afield
Moderate NW'lies cover the UK on day 8 with ECM, due to shallow lows to the
east and NE. The NW'lies continue on day 9 and by day 10 the winds become
NNW'lies, as pressure builds to the NW.
On day 8 GFS shows a ridge moving in from the west, with light winds for
all. The winds become NW'lies on day 9 as the ridge declines and moves
westwards, followed by colder northerlies on day 10. By then, pressure
builds to the north.

Ensemble analysis
(http://91.121.94.83/modeles/gens/gra...ille=Lond res)
The ensembles continue to show a mobile "sine wave" pattern for a week at
least. Both the operational and control runs were cold outliers in the
extended portion of the run.