Note: I've to leave early today - hence this is a shorter analysis. Normal 
service will be resumed tomorrow morning.

Here is a summary of the latest NWP output for noon (GMT) on Sunday. Issued 
0452z, 20th August 2008.

The first half of next week will see a NW/SE split, with rain in the north 
and west and drier conditions (but still with a bit of rain) in the south 
and east.

ECMWF: http://85.214.49.20/wz/pics/Recm1201.gif
Low pressure lies to the west of Iceland, with moderate SW'lies over the UK 
as a result. The low deepens as it moves eastwards on day 6, with SW'lies 
persisting. The winds ease on day 7 as pressure rises to the south.

MetO: http://expert.weatheronline.co.uk/daten/profi/en/ukmo/pslv.html
MetO has SW'lies as well, again with a low over Iceland. On day 6 the low 
moves eastwards and the winds become WSW'lies.

GFS: http://85.214.49.20/wz/pics/Rtavn1201.png
A deep low lies to the NW, with SW'lies for all. On day 6 the low moves 
slowly eastwards, with further SW'lies as a result. Day 7 sees stronger 
SW'liesas the low persists to the north.

GEM: http://expert.weatheronline.co.uk/daten/profi/en/gem/pslv.html
The Canadian run shows light WSW'lies with a ridge to the east.

JMA: http://85.214.49.20/pics/Rjma1201.gif
The Japanese run shows southerlies due to a high over Germany.