> > Does it ever thunder during snow? What about lightning?
>
> I've heard it rumored that it can happen, but have never seen it. In
> real world terms, to get lightning you need something like a 40C (40C
> ~= 70F) difference in temperature between the top and bottom of the
> clouds (colder on top). If the ground temperature is already below
> freezing, that calls for an awfully cold upper air layer.
There's another mechanism, I think, also. When you have two windlayers blowing ice-particles in different directions, you can get lightning discharges from the induction between the layers.
-Adept
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