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Related to altostratus: nimbostratus, altocumulus


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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altostratus (As)

A grayish or bluish cloud sheet or layer of striated, fibrous, or uniform appearance; totally or partially covering the sky; and having parts thin enough to reveal the sun at least vaguely. Altostratus does not show halo phenomena. On weather charts, altostratus clouds are represented by the symbol. image