Here is a summary of the NWP output for noon on Wednesday.
Issued 0509, 8th March 2008

The end of the working week is likely to see low pressure to the north or
NE, with rain for all areas of the UK. As usual, the rain will be heaviest
and the winds strongest over northern areas.

Analysis and evolution to T+120 via GFS
http://85.214.49.20/pics/Rtavn001.png
A deep low covers Iceland, leading to SW'lies over the UK. Tomorrow a trough
moves eastwards, with WSW'lies for all, followed by a stormy day on Monday
as an intense low moves eastwards. By Tuesday the low becomes complex, with
the deepest centre over the North Sea and gales or severe gales persisting
over all areas except Scotland.

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 eastern North Atlantic and
the UK; this is reflected at the 500hPa level as a strong westerly gradient.
MetO also has a strong westerly flow aloft, with the jet slightly further
south than with GFS. ECM has WNW'lies aloft with an upper low to the NE,
while GEM brings upper westerlies as per GFS and MetO.
At the surface GFS brings strong to gale SW'lies, with a low to the NW. MetO
has a low to the north, with westerlies and SW'lies as a result. ECM brings
low pressure over northern Scotland with strong WSW'lies for all.

Evolution to T+168
ECM shows WSW'lies on day 6 as low pressure moves away to the east. On day 7
the winds become WNW'lies as a weak ridge builds to the west.
GFS brings WSW'lies as well on day 6, this time with a low west of Scotland.
On day 7 the low moves eastwards, allowing moderate to strong westerlies to
affect the UK.

Looking further afield
High pressure lies to the west on day 8 with ECM. This leads to NW'lies,
followed by further NW'lies on day 9 as the high continues to build. By day
10 the high splits in two, with one portion heading SE'wards to the south of
the UK. Winds are westerlies as a result.
Day 8 with GFS shows high pressure over the UK. On day 9 the high moves
eastwards, allowing southerlies and SE'lies to cover the UK. By day 10 low
pressure lies over the North Sea and cooler NW'lies and westerlies affect
the UK.

Ensemble analysis
(http://91.121.94.83/modeles/gens/gra...ille=Lon dres)
The ensembles show a typical zonal "sine wave" outlook for the next week to
10 days.