This is an awesome picture. Supercell Thunderstorm by Sean Heavey, nationalgeographic: A supercell thunderstorm rolls across the Montana prairie at sunset. This was a winning shot in the 2010 National Geographic Nature Gallery Photo Contest.
Whoa! Watch A Spectacular Supercell Take Form In Wyoming
Wild Wyoming Cloud Wows Weatherwatchers May 20 2014 Storm chasers catches this incredible cloud on film! This was a supercell updraft thunder storm. Time-lapse video shows supercell thunderstorm take shape Extreme.