Here is a summary of the NWP output for noon on Sunday.
Issued 0541, 31st October 2007

The models continue to show a strong jet bringing a highly zonal flow -
albeit to our north. England and Wales look like remaining largely dry for
the first half of next week, under the influence of the Azores High, but
Scotland and Northern Ireland are at greater risk of seeing wind and rain
from the zonality to the north.

Analysis and evolution to T+120 via GFS
http://85.214.49.20/pics/Rtavn001.png
SW'lies cover the UK, with high pressure to the SW. The SW'lies persist
tomorrow as the high moves eastwards, followed by lighter winds for England
and Wales on Friday due to the high building northwards over southern
England. Scotland and Northern Ireland still lie under SW'lies, though, with
a deep low near Iceland. On Thursday the high recentres to the west, with
westerlies for most.

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/Rjma1201.gif /
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 continues to show a strong zonal flow over the North
Atlantic, with the jet to the north of the UK. At the 500hPa level there's
an upper high to the SW and a westerly gradient aloft. ECM has an upper high
to the SW, with upper NW'lies, while GEM brings upper WSW'lies due to a
ridge to the SW. NGP has upper NW'lies and a trough over the North Sea.
At the surface GFS shows the Azores High over England and Wales, with
westerlies elsewhere (and a trough over Scotland). ECM has the whole of the
UK under high pressure and light winds, while GEM has a ridge over England
and Wales with SW'lies for all. NGP brings a trough over the North Sea and
WNW'lies for all as a result.

Evolution to T+168
ECM shows a high over England and Wales on day 6, with westerlies elsewhere.
On day 7 the high builds over Ireland, leading to NW'lies for the UK.
The Azores High lies to the WSW on day 6 with GFS, leading to WNW'lies for
all. The high moves ESE'wards on day 7, leading to WSW'lies.

Looking further afield
The ECM shows SW'lies on day 8 with high pressure to the south. SW'lies
persist on day 9, with WNW'lies on day 10 as the Azores High builds to the
west.
On day 8 GFS shows high pressure over France, with westerlies and SW'lies
over the UK. Day 8 sees a trough move eastwards, with SW'lies in advance and
westerlies following behind. On day 10 westerlies cover the UK as a weak
ridge moves eastwards.

Ensemble analysis
(http://expert.weatheronline.co.uk/da...ia/ensdia.html - last
night's 18z)
The ensembles for London show a warm few days ahead, followed by cooler (and
increasingly wet) conditions into the second week of November.