On Fri, 14 Oct 2011 06:54:00 -0700 (PDT), Len Wood
wrote:
Curvature shown by the clouds on this suggest that this is a
mesocyclone.

Not sure I agree with your assertion that it's a mesocyclone. True
the cloud bands are curved, but there isn't any rotation evident in
the system - it is just translating west-north-westward. Probably
attained its original shape from the humidity distribution and
small-scale variations in SST and low-level stability, but I don't
think we are looking at anything other than chance distribution of
cloud.

--
Freddie
Bayston Hill
Shropshire
102m AMSL
http://www.hosiene.co.uk/weather/cumulus/