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A flat horizontal layer, the lowest and dullest cloud.
Also known as: Layer cloud symbol, Low layer cloud
Stratus is a featureless grey layer at low level, drawn as a plain horizontal band. Fog is stratus that has reached the ground, which is the relationship most readers have never been told.
Denotes stratus: a low, featureless layer cloud giving drizzle rather than rain.
Contexts: Navigation, Maps
Is the same phenomenon as fog when its base reaches the surface, the distinction being height rather than kind.
Contexts: Navigation, Maps
A plain horizontal band with a straight underside and a slightly uneven upper line.