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Related to altocumulus: cirrocumulus, cirrostratus


see cloudcloud,
aggregation of minute particles of water or ice suspended in the air. Formation of Clouds

Clouds are formed when air containing water vapor is cooled below a critical temperature called the dew point and the resulting moisture condenses into droplets on
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altocumulus (Ac)

altocumulus (Ac)
Elliptical globular cloud units occurring individually or in groups. They may have gray shading on their undersurface. Most individual clouds are frequently elongated elliptical or lenticular units and are distinguished from cumulus by their height and lack of vertical doming. Thin altocumulus clouds are represented on weather charts as image.
References in periodicals archive ?
Thus, altocumulus (al-to-cu-mu-lus) is a puffy cloud at high altitude.
Resembling ripples on water, altocumulus undulatus clouds result from wind shear -- wind speed or direction that changes sharply with height.
Divided into sections devoted to low, middle, and high clouds, this field guide to the skies includes such details as the ferocious, storm-producing capabilities of the cumulonimbus, the UFO-like appearance of the altocumulus lenticularis, and the halo-forming tendencies of the cirrostratus.
The presence of altocumulus cloud identifies this tropical air source in no uncertain fashion.