This trough that's heading SE seems to be a rather weak affair.Visible to the NW ,from SE London,as
a dark line St/Sc with apparently little rain on it.
The Herstmonceux sounding is incomplete but has a very steep lapse rate near the surface.

http://weather.uwyo.edu/cgi-bin/soun...912&STNM=03882

I wonder if a tornado or two is possible,if deeper convection gets going?
V shallow Cu/Sc here today and warm in the sun,

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regards,
david
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