| 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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