On Feb 4, 10:07*am, John Hall wrote:
In article ,
*Dave Cornwell writes:

Well after three weeks of twoing and froing it looks as if the cold will
return in a few days time. Will said - "Note that 850hPa temps. will not be
a useful guide as cold air will be below this to start with. " So I imagine
some of the -15C 850 hPa's being modelled for London in some peturbations
would bring quite chilly conditions ;-)
Dave



Both the 18Z and 00Z GFS operational runs went for very cold NEerlies by
the middle of next week, and so far the 06Z seems to be evolving very
similarly. With such cold air aloft and quite a long sea track over the
North Sea, I imagine that eastern regions could see quite a bit of snow.
But the air would have been warmed in its lowest layer by that longish
sea track, so for places within a mile or two of the coast there might
be a risk of it falling as rain or sleet.
--
John Hall
* * * * * *"Acting is merely the art of keeping a large group of people
* * * * * * from coughing."
* * * * * * * * * * * * * * * Sir Ralph Richardson (1902-83)

12z still shows wintry showers setting in as early as Monday on the
East Coast and there is the potential for more widespread snow to
follow during the week. It's looking unfortunately likely that we're
in for another cold spell that may well be still there in 10 days
time. It's been a long winter even for us in balmy South Devon. The
crocuses and the 6 daffodils which are in flower in my garden look
like they may be in for a shock next week! The ECM 00z ensembles show
a cooling trend from tomorrow, with cold weather right out past mid-
month:

http://www.meteogroup.co.uk/uk/home/..._forecast.html

and the gfs 06z ens show a more significant cooling next week, with a
gradual recovery to something a little milder:

http://www.netweather.tv/index.cgi?a...nsviewer;sess=

Credits to Meteogroup and netweather for the info, as always.
Caveat....could all change with this evenings model runs!