0 0 CUMULUS, IF ANY, ARE QUITE SMALL
1 1 CUMULUS OF INTERMEDIATE SIZE
2 2 SWELLING CUMULUS
3 3 SWELLING CUMULUS WITH TOWERS
4 4 SWELLING CUMULUS WITH TOWERS HAVING PRONOUNCED TILT
5 5 TALL CUMULUS CONGESTUS
6 6 ISOLATED CUMULONIMBUS
7 7 NUMEROUS CUMULONIMBUS
8 8 CONTINUOUS DENSE MIDDLE CLOUDS
9 9 CONTINUOUS SHEETS OF MIDDLE CLOUDS
15 15 MISSING VALUE
