Here is a summary of the NWP output for noon on Friday.
Issued 0509, 3rd November 2008

Low pressure will dominate the UK over the weekend, with a low to the NW
bringing SW'lies across the UK. As usual in these situations, the heaviest
rain will be in the north and west.

Analysis and evolution to T+120 via GFS
http://85.214.49.20/pics/Rtavn001.png
A col covers Scotland and Northern Ireland, with NE'lies elsewhere. The
NE'lies persist tomorrow for England and Wales, with a ridge over Scotland
and Northern Ireland. There's little change on Wednesday, but by Thursday a
col covers all areas except Scotland, which lies under easterlies and a
ridge.

T+120 synopsis
http://85.214.49.20/pics/Rtavn12014.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 much stronger jet than of late over the North
Atlantic, with a light southerly flow over the UK. At the 500hPa level there
are WSW'lies, with a deep upper low near Iceland. MetO shows upper
southerlies, with a trough to the west, while ECM brings upper southerlies
too. GEM has upper southerlies as the result of a small upper low to the
west.
At the surface, GFS has southerlies due to a trough to the west. MetO has a
trough over the Irish Sea, with southerlies and SSE'lies for the UK. ECM has
SSW'lies and a trough over England, while GEM shows a mixture of SSW'lies
and southerlies, again with a weak trough over the UK.

Evolution to T+168
Day 6 with ECM shows SSW'lies with a secondary low to the west. There are
further SSW'lies on day 7 as the low moves swiftly NE'wards to the north of
the UK.
On day 6 with GFS strong to gale force SW'lies cover the UK, with a deep low
to the NW. Day 7 sees the low to the north and strong to gale force SW'lies
persisting.

Looking further afield
On day 8 with ECM a WSW'ly flow covers the UK, with lows to the north and
WNW. Day 9 sees a weak ridge over England and Wales with a col elsewhere,
followed by a ridge for most on day 10. The exception is Scotland, which
lies under SW'lies.
GFS brings a trough to the east on day 8, with WSW'lies and westerlies
across the UK. The winds become WNW'lies on day 9 as the trough persists to
the east and on day 10 the winds become WSW'lies as low pressure moves
across Iceland.

Ensemble analysis
(http://91.121.94.83/modeles/gens/gra...ille=Lon dres)
The ensembles continue to show temperatures generally around, or slightly
above average for the forseeable future.