Here is a summary of the NWP output for noon on Monday.
Issued 0529, 22nd January 2009

Zonality continues for the forseeable future, with the middle part of the
week seeing ridges interspersed with troughs. It's unlikely to be as cold as
recently due to lows taking a more northerly track, thus any snow will
generally be restricted to the highest ground in the north.

Analysis and evolution to T+120 via GFS
A deep low lies to the NW, leading to strong southerlies over the UK.
Tomorrow a secondary low crosses England, with SW'lies to the south and
easterlies for northern England. Further north winds are SW'lies as the low
to the NW deepens in situ. Saturday sees lighter westerlies as the secondary
low moves away to the east and on Sunday southerlies cover the UK ahead of a
low 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 and zonal flow over the western Atlantic
with a weak ridge over Ireland. At the 500hPa level there's an upper ridge
over the UK, with SW'lies aloft. MetO has a weak ridge too, while ECM has a
disrupting trough over the UK. GEM brings an upper trough too.
At the surface, GFS has SSW'lies for all with a deep low south of Greenland.
MetO is similar, also with SSW'lies, while ECM has a low over the British
Isles instead. GEM has a weak ridge over Ireland and a trough over the North
Sea, leading to SW'lies for Scotland and WNW'lies elsewhere.

Evolution to T+168
ECM shows southerlies on day 6 as a trough moves eastwards. On day 7 a weak
ridge to the west leads to WSW'lies for all.
GFS brings WSW'lies on day 6, with a trough crossing the UK. Another trough
approaches from the west on day 7, with southerlies for all as a result.

Looking further afield
ECM brings a trough eastwards on day 8, with southerlies ahead of it and
WNW'lies following behind. On day 9 a deep low to the west brings
southerlies for all and by day 10 the low fills to the NW, with WSW'lies for
all.
Day 8 with GFS shows WSW'lies as low pressure fills to the NW. A secondary
low lies to the NW on day 9, leading to southerlies and SSW'lies and on day
10 low pressure crosses the UK.

Ensemble analysis
(http://91.121.94.83/modeles/gens/gra...ille=Lon dres)
The ensembles continue to show a zonal trend for the next week to 10 days,
but thereafter there's a small but growing sign of blocked conditions.