STEPHEN BURT / SCIENCE PHOTO LIBRARY STEPHEN BURT / SCIENCE PHOTO LIBRARY
Altocumulus stratiformis clouds in summer. Altocumulus clouds occur at middle altitudes (2400-6000 metres). There are several types of altocumulus clouds. Altocumulus stratiformis typically forms sheets and is associated with fair weather. Photographed in the evening in July over Berkshire, UK.
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