Here is a summary of the latest NWP output for noon (GMT) on Friday. Issued
0358z, 13/05/13.

The weekend will see northerlies setting in as the result of a low to the
east. All areas are at risk of rain as a result, but eastern areas are most
likely to see rain.

ECMWF: http://www.wetterzentrale.de/pics/Recm1201.gif
The UK lies under a col. Northerlies set in on days 6 and 7 as low pressure
deepens to the east. The winds become NNE'lies on days 8 and 9 as the low
fills to the SE. Day 10 sees further NE'lies as pressure builds to the NW.

MetO: http://www.wetterzentrale.de/pics/Rukm1201.gif
MetO shows northerlies with a low over Germany and a ridge to the west. Day
6 sees NNW'lies and northerlies as the low remains in situ.

GFS: http://www.wetterzentrale.de/pics/Rtavn1201.png
A shallow low covers England and Wales, leading to easterlies for most.
There are northerlies on day 6 as the low moves away to the east, followed
by further northerlies on days 7, 8 and 9. By day 10 there are NNE'lies as
pressure builds to the north.

GEM: http://www.wetterzentrale.de/pics/Rgem1201.gif
The Canadian model shows northerlies with a low to the east.

JMA: http://www.wetterzentrale.de/pics/Rjma1201.gif
As with ECM, JMA shows a col over the UK.