Nimbostratus
Cloud
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A nimbostratus cloud is a multilevel, amorphous, nearly uniform, and often dark-grey cloud that usually produces continuous rain, snow, or sleet, but no lightning or thunder. Wikipedia
Altitude: 500–5,500 m; (2,000–18,000 ft)
Precipitation: Yes: rain, ice pellets, or snow; sometimes virga
Abbreviation: Ns
Appearance: Dark and featureless layer cloud full of water vapor; responsible for rain and snow
Genus: Nimbostratus (rain, layered)