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from Slate Magazine

Powerful Microburst Flattened Part of a Montana Forest in 1999 (PIC)

The Most Powerful Weather Phenomenon You've Never Heard Of: The Microburst

Hovering in the sky, this rainbow cloud over Mount Everest took an astonished astronomer by surprise. Oleg Bartunov, 51, caught the spectacle on camera during a Himalayas expedition in Nepal.