METAR

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• Sky condition: SKC: 0, sky clear; FEW: 0-2; SCT: 3-4; BKN: 5-7; OVC: 8. CLR: clear below 10,000.
• Cloud types: C{I,S,C}: cirr{us, ostratus, ocumulus}; A{S,C,CC}: alto{stratus,cumulus,cumulus castellanus};[T]CU: [towering] cumulus; NS: nimbostratus; S{T,F,C}: strat{us, us fractus, ocumulus}; CUFRA: cumulus fractus; CB: cumulonimbus.
• Cloud heights: '00 feet.
• Meta: Time is DDHHMMZ. May be CCX: CC = corrected; X is correction letter (B = second, etc.).
• Wind: DDDSS (d = degree, s = speed).
• Visibility: NSM (e.g. 2SM). 3/4SM = 0.75, not 3-4.
• Runway visual range: RXX/NNNNFT/[UDN]. When less than 1SM visibility or less than 6,000' runway visual range. UDN = viz is up/down/no change.

Temperature: NN/NN = current temp/dew point. MNN = minus NN.