86.1 MB (15.5 MB compressed)
6720 x 4480 pixels
56.9 x 37.8 cm ⏐ 22.4 x 14.9 in (300dpi)
ROGER HILL / SCIENCE PHOTO LIBRARY ROGER HILL / SCIENCE PHOTO LIBRARY
Supercell thunderstorm. Classic supercell thunderstorm over countryside in northeast Montana, USA. 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. Tornadoes may form in the mesocyclone, in which case the storm is classified as a tornadic supercell thunderstorm. The storms also produce torrential rain and hail. Photographed in July 2018.
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