Here is a summary of the NWP output for 12z on Tuesday.
Issued 0527z, 29th June 2007.

The middle of next week will be mixed, with typical zonal conditions over
the UK. All areas will see rain, but with a ridge caught up in the flow it's
likely one day at least will be largely dry; currently that looks like
Thursday.

Analysis and evolution to T+120 via GFS
http://expert.weatheronline.co.uk/pslv_frame.htm
Low pressure covers Scotland, leading to SW'lies elsewhere. A col crosses
the UK tomorrow, bringing a brief spell of lighter winds before southerlies
pick up ahead of the next low for Sunday. By Monday the low covers Scotland,
leading to SW'lies and southerlies elsewhere.

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 jet stream chart shows a strong and very zonal jet across the North
Atlantic and into France and Germany. The UK lies under a trough. At the
500hPa level there's an upper low over Scotland and Northern Ireland, as is
the case with MetO. ECM is similar, with the exception that the upper low is
further south, covering the whole of the UK. GEM is similar to ECM, as is
NGP.
At the surface GFS brings westerlies for all with complex low pressure to
the north, NW and NE. MetO shows a large low to the north and moderate to
strong westerlies over the UK. ECM has the low further south, over the North
Sea. A trough lies to the east, with westerlies for the UK. GEM shows
WSW'lies with a slack low over Scotland, as does NGP.

Evolution to T+168
ECM shows a highly zonal pattern affecting the UK. On day 6 low pressure
moves eastwards, leaving the UK under westerlies. On day 7 a weak ridge
brings further westerlies ahead of the next low to the west.
GFS brings a ridge on day 6 and westerlies, followed by WSW'lies as a low
fills to the NW on day 7.

Looking further afield
ECM maintains the mobile picture on days 8 to 10, with westerlies backing
SW'ly as one low moves away only to be replaced by another from the west.
GFS shows the pattern becoming slow-moving on days 8 to 10, with an upper
trough slowly moving eastwards towards the UK. On day 8 winds are SW'lies
with a low to the north. Day 9 sees the low fill and a weak trough cross the
UK. By day 10 pressure builds across the UK as the low moves northwards.

Ensemble analysis
(http://expert.weatheronline.co.uk/da...ia/ensdia.html -
yesterday's 12z)
The ensembles show temperatures within a couple of degrees of average for 4
days, followed by a high chance of a cooler interlude.