Here is a summary of the NWP output for 12z on Friday.
Issued 0532z, 19th June 2007.

It's now looking like this weekend's low pressure will be slower moving than
thought yesterday, which means the whole weekend will be unsettled for much
of the UK. The unsettled conditions look like persisting into next week as
well, with an upper trough and associated surface low never far away.

Analysis and evolution to T+120 via GFS
http://expert.weatheronline.co.uk/pslv_frame.htm
Low pressure lies to the SW, leading to SE'lies for the UK. Tomorrow the low
fills and moves NE'wards, with a trough over the UK. To the south winds are
southerlies, with easterlies for northern areas of the UK. The trough covers
Scotland on Thursday, leading to NE'lies for the far north and southerlies
for the rest of the UK. By Friday the low fills over the Isles of Scilly,
with light winds over much of the UK.

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 continues to show a trough over the UK and a large
ridge to the west. The 500hPa chart shows an upper high to the WNW and a
large ridge over Greeland. An upper trough covers the UK, with several upper
lows caught up in the flow. MetO shows a trough over the UK as well, as does
ECM. GEM places the trough further east,
At the surface GFS shows low pressure to the NE and a trough over the UK.
Scotland and Northern Ireland lie under NNW'lies, with WSW'lies elsewhere.
MetO shows a trough over the SE of England with northerlies and NNW'lies as
a result elsewhere. ECM has NW'lies and westerlies over the UK, with low
pressure further to the NE. GEM also shows NW'lies, this time with a trough
over Denmark.

Evolution to T+168
ECM shows the upper high heading SSE'wards to the west of the UK. On day 6
northerlies cover much of the UK as a trough moves over SE England. Day 7
sees strong NNW'lies for all, with a low deepening over the Netherlands.
GFS by contrast shows the upper high retrogressing slightly, although the
core of the upper trough progresses slowly eastwards. On day 6 low pressure
covers eastern Scotland, with a trough southwards over England. Winds are
SW'lies over England and Wales with northerlies or NNW'lies elsewhere. Day 7
sees a trough over the UK, with northerlies for Scotland and Northern
Ireland and WSW'lies elsewhere.

Looking further afield
Day 8 on the ECM shows NW'lies for all with a ridge to the west. The winds
back WNW'ly on day 9 as the ridge sinks southwards and by day 10 lighter
NW'lies affect the UK.
GFS shows northerlies and NNW'lies on days 8 to 10 as a ridge to the west
slowly moves SE'wards.

Ensemble analysis
(http://expert.weatheronline.co.uk/da...ia/ensdia.html - last
night's 18z)
The ensembles show another 6 days of temperatures near average, followed by
a cool spell.