alto-stratus








noun, plural al·to·stra·tus. Meteorology.

  1. a cloud of a class characterized by a generally uniform gray sheet or layer, lighter in color than nimbostratus and darker than cirrostratus: of medium altitude, about 8000–20,000 feet (2450–6100 meters).

noun plural -ti (-taɪ)

  1. a layer cloud at an intermediate height of about 2400 to 6000 metres (8000 to 20 000 feet)

Plural altostrati (ăl′tō-strătī′)

  1. A mid-altitude cloud that extends in flat, smooth sheets or layers of varying thickness. Altostratus clouds generally form between 2,000 and 6,100 m (6,560 and 20,000 ft) and often produce long, steady rain showers. See illustration at cloud.
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