Place: Vollore-Ville, Puy-de-Dôme, Auvergne, France
Date: 2009-07-16
Description: A cumulonimbus with some extraordinary mammatus, "American style". A beautiful storm was causing concern in Clermont-Ferrand. Hail, strong wind and heavy rains were observed, with a temperature of 36°C. This photo shows the cloud and its strange formations.
Author: Amet Stéphane, France
Equipment used: Canon Eos 300D + 18-55mm EFS
Original resolution: 2643x1424
