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Three stacked horizontal lines marking visibility below a kilometre.
Also known as: Fog plot symbol, Mist symbol
Fog is drawn as three horizontal lines. Its meteorological definition is a visibility threshold, not a description of appearance: below one kilometre it is fog and above it is mist, and the same air can be either as the visibility changes.
Denotes fog, drawn as three parallel horizontal lines in the present-weather position of the station model.
Contexts: Navigation, Maps
Is defined by a visibility threshold rather than by appearance: below one kilometre the observation is fog and above it is mist.
Contexts: Navigation, Maps
Three straight horizontal lines of equal length stacked one above another with even gaps.