"Richard Dixon" wrote in message
...
Enough of this snow nonsense, how about some baroclinic instability
for a change.

http://picasaweb.google.com/richsdix...64946187771458

All of the (available) models coming in to line for a system for
Sunday. Credit it where it's due, this was signalled first by the GFS
on Sunday before any others - typically I wrote it off as the usual
GFS fantasy.

The direction is the interesting one for me - similar path to the
October Storm so no doubt some warm air locked into this one which can
only aid the potential for rapid cyclogenesis.

Richard

Hi Richard, an interesting beast indeed!

Developing from an unusually far south location in association with a near
record southern extension of the Atlantic upper trough. Very warm 564Dam
air entrained in a SW'ly jet streak associated with a temporary meandering
of the polar front jet. Northern Fraqnce could be battered with storm force
winds and also SE England at risk, but wide spread of low tracks as one
would expect. On NW side of low there is a definite risk of heavy snow as
deep cold air to the north gets entrained as well, particularly on high
ground putting SW England, the Midlands and Wales in the upland snow firing
line. Most precip likely though (as usual) close to low centre on northern
side.

Exciting stuff!

Will
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