By the way, talking about thunderstorms and weather, does anybody knows a good book about tropical meteorology...in this part of the world (the heart of the darkness, to dramatize a little....) it's looks to be sometimes more mystical than rational. I am particulary interested in winds at low altitudes, and others jokes of that intertropical front.
To come back to come back to ligthnings; thanks to the very comprehensive and very technical posts until now.