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Supercell thunderstorm: Inside these severe long-lived storms the wind speed and direction changes with height. This produces a strong rotating updraft of warm air (a mesocyclone) as well as a separate downdraft of cold air.

from BuzzFeed

21 Unbelievable Photos That Are Not Photoshopped

Tornado and Rainbow Over Kansas Explanation: The scene might have been considered serene if it weren't for the tornado. Last June in Kansas, storm chaser Eric Nguyen photographed this budding twister in a different light -- the light of a rainbow. Pictured above, a white tornado cloud descends from a dark storm cloud. The Sun, peeking through a clear patch of sky.

from Boston.com

Chaiten Volcano Still Active