Dictionary.com · The American Heritage® Dictionary
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Cumulonimbus cloud - Wikipedia, the free encyclopedia
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Cumulonimbus incus - Wikipedia, the free encyclopedia
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Cumulonimbus clouds (Cb) are much larger and more vertically developed than fair weather cumulus. They can exist as individual towers or form a line of towers called a squall line.
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; This is a photograph of a cumulonimbus cloud. Notice how the top of the cloud is shaped like an anvil. Click on image for full size version (22K JPG); Courtesy of University Corporation for Atmospheric Research...
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Cumulonimbus clouds are different because they cannot be classified as low, middle or high altitude clouds. These are often storm clouds which can be ten or more miles in height, extending through all the levels of altitude.
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[edit] Cumulonimbus capillatus ... [edit] Cumulonimbus combined with others ... 1.2.1 Cumulonimbus praecipitatio...
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Big Cumulonimbus.JPG; 557,881 bytes; ... Anvil of Cumulonimbus and Cu con.JPG ... Cumulonimbus calvus a2.JPG...
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When a cumulus grows into bigger clouds with large vertical extension, its name changes to cumulonimbus calvus or towering cumulus (see special Towering cumulus page). These can be found on very high altitudes and if it develops even more it will turn into a cumulonimbus capillatus.
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The cloud that forms is called cumulonimbus. It resembles cumulus but towers much higher, with a base at 1,000-5,000 ft (300-1,500 m). Rain starts to fall. Inside this very violent cloud, air rises rapidly in the convection cells and sinks between them.
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