Here is a summary of the latest NWP output for noon (GMT) on Monday. Issued
0507z, 23rd April 2009.

The models continue to show a less settled outlook than of late. A trough
will cross the UK on Monday or Tuesday, bringing cooler weather, wind and
rain across the UK. After that it looks like SW'lies for all, with the best
of any brightness in the south and east.

ECMWF: http://expert.weatheronline.co.uk/da...mwf/ecmwf.html
A trough covers the UK, with southerlies for Scotland and the eastern half
of England. Elsewhere winds are westerlies, followed by SW'lies for all on
day 6 as a transitory ridge moves swiftly eastwards. There are further
SW'lies on day 7.

MetO: http://expert.weatheronline.co.uk/da...ukmo/pslv.html
SW'lies cover the UK, with low pressure to the NW. The SW'lies strengthen on
day 6 as the low deepens to the NW.

GFS: http://expert.weatheronline.co.uk/pslv_frame.htm
The UK lies under moderate westerlies with troughs to the east and west. The
latter moves eastwards on day 6, allowing SW'lies to affect all areas. The
winds become SSW'lies on day 7 as pressure builds to the SE.

GEM: http://expert.weatheronline.co.uk/da.../gem/pslv.html
The Canadian run brings SW'lies for all with a low to the NW.

JMA: http://www.wzkarten.de/pics/Rjma1201.gif
The Japanese run shows a trough over the UK with southerlies and SSW'lies as
a result.