Altostratus vs Nimbostratus - What's the difference?
altostratus | nimbostratus |
(physics, meteorology). A principal medium-level cloud type in the form of a gray or bluish (never white) sheet or layer of striated, fibrous, or uniform appearance.
(meteorology) A low-level, principal cloud type, generally formless and dark grey in colour, occurring in layers at low altitude (usually below 2400 metres) and usually bringing precipitation; abbreviated N s .