Here is a summary of the NWP output for 12z on Wednesday.
Issued 0510z, 30th June 2007.

The models are split next week. ECM keeps the unsettled theme going as the
weekend approaches, with a low crossing the UK on Friday. GFS shows a much
warmer and increasingly settled picture, with high pressure close to the
south. This evolution has been gaining support from the GFS ensembles over
the past couple of days, but as yet it's too far out to be certain.

Analysis and evolution to T+120 via GFS
http://expert.weatheronline.co.uk/pslv_frame.htm
England and Wales lie under a weak ridge, with a col elsewhere. Tomorrow a
low approaches from the west, with southerlies and SE'lies as a result. Low
pressure moves over Scotland on Monday, bringing westerlies and SW'lies. The
low moves NW'wards on Tuesday, with SW'lies for all. By Wednesday a
secondary low deepens over East Anglia, bringing NW'lies and WNW'lies over
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 shows a strong jet across the UK, with a weak ridge to
the west. At the 500hPa level there's a NW'ly flow over the UK and a ridge
to the west. MetO shows an upper low to the NW and ECM is similar, albeit a
little more progressive. GEM shows a deeper upper low over Scotland, while
NGP is closer to GFS and shows a ridge to the west.
At the surface GFS brings westerlies with a ridge over Ireland. MetO shows
WSW'lies and ECM shows stronger WSW'lies, with a low to the NE. GEM brings
strong WSW'lies over the UK, while NGP has moderate WNW'lies.

Evolution to T+168
ECM shows a ridge over the UK on day 6, before a deep low crosses the UK on
day 7, bringing strong to gale force westerlies and NW'lies.
GFS brings warm SW'lies over the UK on day 6, with a ridge over France. On
day 7 the winds become southerlies as a high declines to the SE.

Looking further afield
ECM shows westerlies on day 8, followed by a high and light winds on day 9.
By day 10 a low moves up from the SW, leading to a col over Scotland and
easterlies for most other areas.
GFS brings a col on day 8. Day 9 sees a low over northern France and a
mixture of northerrlies and NW'lies as a result. By day 10 another col
covers Scotland, with a ridge elsewhere.

Ensemble analysis
(http://expert.weatheronline.co.uk/da...ia/ensdia.html -
yesterday's 12z)
The ensembles show temperatures slightly below average for the next week or
so.