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NOTE-
Fog (FG) is observed or forecast only when the visibility is less than five-eighths of mile, otherwise mist (BR) is observed
or forecast.

Examples:

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NOTE-
"SKC" will be reported at manual stations. "CLR" will be used at automated stations when no clouds below 12,000 feet
are reported.
ceiling layer is not designated in the METAR code. For aviation purposes, the ceiling is the lowest broken or overcast
layer, or vertical visibility into an obscuration. Also there is no provision for reporting thin layers in the METAR code. When
clouds are thin, that layer must be reported as if it were opaque.

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