Here is a summary of the NWP output for noon on Wednesday.
Issued 0558, 30th October 2009

The latter half of the working week will see low pressure close to the UK
with widespread rain and temperatures close to or below average. There'll be
a brief reprieve over the weekend before the next low approaches the UK from
the west next week.

Analysis and evolution to T+120 via GFS
Southerlies and SSE'lies cover the UK as a trough moves slowly eastwards.
Southerlies persist tomorrow, with a secondary low to the SW. The low moves
swiftly NE'wards and deepens so that by Monday it lies to the NE, with much
colder westerlies over the UK. SW'lies affect the UK on Tuesday ahead of a
trough to the west.

T+120 synopsis
http://91.121.93.17/pics/Rtavn12014.png /
http://91.121.93.17/pics/Rtavn1201.png
http://91.121.93.17/pics/Rukm1201.gif
http://91.121.93.17/pics/Recm1201.gif /
http://www.meteociel.fr/modeles/nogapse_cartes.php
The jetstream chart shows a strong jet over the NortH Atlantic with a ridge
to the west and a troughg over the UK. At the 500hPa level a low is centred
over Scotland, while ECM centres an upper low further to the east. MetO has
a weaker low to the north, while GEM has a low to the NW instead. JMA's low,
as yesterday, is further south than the other runs.
At the surface, GFS brings strong westerlies and NW'lies with a low east of
Scotland. ECM also has a low over the North Sea, this time with northerlies
for Scotland and westerlies or WSW'lies elsewhere. MetO has westerlies with
a weaker low to the north and GEM brings SW'lies with a low to the WNW. JMA
has NW'lies for all with a low over the southern North Sea.

Evolution to T+168
ECM brings NW'lies on day 6 as low pressure fills over the North Sea. A col
brings lighter winds for most on day 7.
GFS has low pressure filling over northern England on day 6, leading to
northerlies for Scotland, Northern Ireland and Wales and SW'lies for most of
England. A col covers most areas on day 7.

Looking further afield
ECM shows easterlies on day 8 as low pressure lies to the south. A col on
day 9 brings light winds, followed by southerlies on day 10 ahead of a
trough.
Day 8 with GFS shows southerlies as a trough approaches from the west. The
trough slowly moves eastwards on day 9, leaving a ridge over the UK. On day
10 low pressure lies to the SW, leading to easterlies for the UK.

Ensemble analysis
(http://91.121.94.83/modeles/gens/gra...ille=Lond res)
The ensembles continue to show a generally cool and wet outlook.