Good image of the activity over Scotland
http://www.sat.dundee.ac.uk/abin/pro...roject.ch2.jpg
(reg required etc etc)

MetO Form215 VT 15Z suggests vertical speeds of up to 400-450FPM (feet per
minute).

If Jack's watching how turbulent would conditions be and at what sort of
thresholds did you become 'interested' from a pilot's perspective ? I ask
because the military charts only include SIGMET-able waves (500FPM+) and the
future combined military/civil charts could use this threshold.

Jon.