Tutorial
Altocumulus Clouds
These middle clouds typically display a patchy, cottonball appearance. While
low-level cumulus clouds form in air rising from heated areas on the ground,
altocumulus clouds arise from unstable middle-layer air masses. The bases of
these clouds are usually found around 6,500 to 23,000 feet. In a variation of
these clouds, the altocumulus castellanus, the individual puffs are more turret-shaped
than rounded, indicating in increased amount of convection. Other middle clouds
include lenticular and altostratus
clouds.
| Weather Tutorial: Low Clouds | Weather Tutorial: Middle Clouds |
| Weather Tutorial: High Clouds | Weather Tutorial: Vertically Advanced Clouds |
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