I intend to add to this page when I get some
decent images of other plume types.

http://fp.mtullett.plus.com/spanboard3/


Mike, a very interesting analysis and comparison indeed. A nice illustration of
the importance of good visual observation. Also, I am amused at the other
'inversion' in today's weather ; a beautiful blue sky in your camera shot but
grey, gloomy, misty and - at times quite wet - in the Thames valley. About
time too.....

Julian Mayes
West Molesey, Surrey.