60.2 MB (1.3 MB compressed)
5616 x 3744 pixels
47.5 x 31.8 cm ⏐ 18.7 x 12.5 in (300dpi)
ROGER HILL / SCIENCE PHOTO LIBRARY ROGER HILL / SCIENCE PHOTO LIBRARY
Supercell thunderstorm with a wall cloud and large precipitation core over fields. A supercell thunderstorm is a severe long-lived storm within which the wind speed and direction changes with height. This produces a strong rotating updraft of warm air, known as a mesocyclone, and a separate downdraft of cold air. Photographed near Douglas, Wyoming, USA, on 12th July 2009.
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