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Middle Clouds


Altostratus clouds are part of the middle cloud group.
Cloud photos copyright 2000-2001 by Keith G. Diem. Used by permission.

The middle cloud group consists of Altostratus and Altocumulus clouds. Middle clouds are made of ice crystals and water droplets. The base of a middle cloud above the surface can be anywhere from 2000-8000m in the tropics to 2000-4000m in the polar regions.


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Last modified September 24, 2007 by Becca Hatheway.
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