June 24, 2006.
Lecco, Italy.

Photographer states :: 6/24/06 h.8.34pm: In less than an hour a sunny warm day like many others has turned into the stormiest in this Summer for us. The photo shows probably a shelf cloud (not actually one of the neatest examples, but these are not the Plains!) of a huge multi-cellular system with overshooting top passed on almost the whole Northern part of Italy. Despite its size, its frightning appearance and the number of lightning strikes, this storm left ridiculous amounts of rain, probably because humidity in the air was low.