Whale's mouth cloud - Badlands National Park, South Dakota
Whale's mouth cloud - Badlands National Park, South Dakota

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Caption   An ominous squall line approaches Badlands National Park, South Dakota. The clouds have assumed a dramatic form known as a whale's mouth, which marks the leading edge of cold air flowing out from the severe storm into the surrounding warm air. The boundary between the warm and cold air is very turbulent, which gives the cloud its gnarled appearance.
Photo Id   w3785-cac3-7611e
Date and Time   June 12, 2011   5:36 PM
Location   Badlands National Park, South Dakota
latitude 43° 52' 54.2" N       longitude 102° 15' 51.9" W
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Keywords   whales mouth, cloud, storm, thunderstorm, severe, squall, squall line, gust front, outflow, outflow boundary, downdraft, weather, badlands, Badlands National Park, Wall, Rapid City, Pennington County, South Dakota, SD, United States, dramatic, danger, dangerous, ominous, menacing, threatening, frightening, risk, peril, hazard, grasslands, grass, prairie, gray, low key, landscape
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