A thunderstorm over the plains of Colorado with anvil clouds. These clouds take their flattened shape as the rising air in the thunderstorm expands and spreads out when it meets the relatively warmer air near the tropopause.
Thunderstorm (DI02125) Photo by Carlye Calvin
2009-06-13
Carlye Calvin
University Corporation for Atmospheric Research (UCAR)
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Clouds
Nature
Weather
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DI02125
http://n2t.net/ark:/85065/d7jq0z55