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Sky Condition Descriptor Codes


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CLR
Sky Clear below 12000 feet (automated)
SKC
Sky Clear (human generated)
FEW
0 to 2/8 cloud cover
SCT
3/8 to 4/8 cloud cover
BKN
5/8 to 7/8 cloud cover
OVC
Overcast
CB
Cumulonimbus
TCU
Towering Cumulonimbus
ACC
Altocumulus Castellanus
VV###
Vertical Visibility in hundreds of feet