I've noticed for the last hour on the 15 min AVBrief Radar returns that some
sort of rotation is forming on the band of showers over Hull-ish way. Is
this the start of a Polar low or just a disturbance that happens to look
"circular".

Doubt if this amounts to a Polar Low,any such circulation is likely to be short lived over land
anyway.
BTW interesting straight band of Cbs forming in the southern N Sea-
http://www.sat.dundee.ac.uk/abin/pro...roject.ch4.jpg

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regards,
david
(add 17 to waghorne to reply)