Name:total_cloud_coverAbbreviation:tccUnit:%
DefinitionPercentage of the sky hidden by all visible clouds.
Validityinstantaneous
Comment 
GRIB 2
Discipline= 0  
Parameter Category= 6  
Parameter Number= 1  
Type of first fixed surface= 1Type of second fixed surface= 8
Scale factor of first fixed surface= All 1'sScale factor of second fixed surface= All 1's
Scaled value of first fixed surface= All 1'sScaled value of second fixed surface= All 1's