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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.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
Thus, altocumulus (al-to-cu-mu-lus) is a puffy cloud at high altitude.
A key missing link is the absence of a middle cloud at Altocumulus level.
Friton, regional director of the American Meteor Society, saw many flashes of light through holes in an altocumulus doud deck "like white snowflakes in a minor snowstorm." For five hours Canadian observers under the supervision of Isabel K.
This is what produces the thick, opaque altocumulus and altostratus clouds at 10 to 15,000 feet where temperatures average 0 to -10 degrees F.
The mornings of these outbreaks are characterised by the appearance of clouds called altocumulus floccus and altocumulus castellanus.
But as the week closed, tangible evidence of this pattern brought middle level altocumulus across the central and southerly parts of the country, ahead of and in conjunction with the initial trough.
The phenomenon is similar in appearance to the colorful atmospheric coronas that occasionally ring the Sun or Moon, when they are covered by altocumulus clouds.
This radar triad at Addu Atoll provided unprecedented observations of the entire tropical cloud population, including precipitating and nonprecipirating shallow cumulus clouds, midlayer altostratus and altocumulus, convective congestus, isolated deep convective clouds, upper-level anvil and cirrus clouds, mesoscale convective systems, and hydrometer types.
A major trough passed quickly south of the Cape, only to be succeeded even quicker by another system, while a northwesterly drift persisted aloft, as witnessed by several successive morning's turbulent altocumulus sheets.
The air along and just above the frontal surface is typically filled with broken to overcast stratocumulus, altocumulus, and cirriform layers.