"Col" wrote in news:dln04g$6o1$1
@nwrdmz01.dmz.ncs.ea.ibs-infra.bt.com:


"nguk" wrote in message
...
http://217.160.75.104/pics/Rukm1441.gif

Dont often see a northerly that potent with a high pressure
dominating the atlantic like that linked upto greenland.

Look at the size of that sc.... High pressure 0-o

GFS is similar:
http://217.160.75.104/pics/Rtavn1381.html

But whichever way you look at it, that air's come from Spitzbergen!

Following the 1000mb contour and reading off the underlying 500mb heights,
you can see from the UKMO chart that the thickness is down to 520dm over
London, so even a fair chance of sleet/snow down here.

Richard