On 12 Feb, 22:14, John Hall wrote:
In article ,
*John Hall writes:

The three main models (ECM. GFS, UKMO) now seemed to have firmed up on
the track of next week's depression, bringing it southwards just to our
west. The ECM operational run introduces a new feature, moving the Low
to our east by next weekend (i.e. 20th and 21st) and so introducing a
flow from a northerly quarter over the UK.

The 18Z GFS operational run seems pretty much identical out to T+120
hours, which is as far as it's got at the moment. It looks as though
there could be an awful lot of precipitation over central southern
England and the east Midlands between about noon on Tuesday and noon on
Wednesday, as there's a band of heavy rain or snow that seems to hardly
move. So if there isn't very deep snow then there could well be
flooding.
--
John Hall
* * * * * *"Acting is merely the art of keeping a large group of people
* * * * * * from coughing."
* * * * * * * * * * * * * * * Sir Ralph Richardson (1902-83)

GFS 12/02/2010 18Z +102
http://www2.wetter3.de/Schnitte/1_102_L_0_0_B_34_71.gif
http://www.wzkarten3.de/pics/Rmgfs1023.gif

The first chart shows a cross section of the atmosphere running along
the 0 Longitude line, so London's at 51N. Looks like it's going to be
mainly rain? Very marginal, but gut feeling tells me it's going to be
mostly rain in Southern England. Let's hope my gut is wrong!