| Code/Flag Figure |
Description |
Status |
|
0
|
OBSERVING RULES FOR BASE OF LOWEST CLOUD AND CLOUD TYPES OF FM 12 SYNOP AND FM 13 SHIP APPLY
|
|
|
1
|
FIRST NON-CUMULONIMBUS SIGNIFICANT LAYER
|
|
|
2
|
SECOND NON-CUMULONIMBUS SIGNIFICANT LAYER
|
|
|
3
|
THIRD NON-CUMULONIMBUS SIGNIFICANT LAYER
|
|
|
4
|
CUMULONIMBUS LAYER
|
|
|
5
|
CEILING
|
|
|
6
|
CLOUDS NOT DETECTED BELOW THE FOLLOWING HEIGHT(S)
|
|
|
7
|
LOW CLOUD
|
|
|
8
|
MIDDLE CLOUD
|
|
|
9
|
HIGH CLOUD
|
|
|
10
|
CLOUD LAYER WITH BASE BELOW AND TOP ABOVE THE STATION
|
|
|
11
|
CLOUD LAYER WITH BASE AND TOP BELOW THE STATION LEVEL
|
|
|
20
|
NO CLOUDS DETECTED BY THE CLOUD DETECTION SYSTEM
|
|
|
21
|
FIRST INSTRUMENT DETECTED CLOUD LAYER
|
|
|
22
|
SECOND INSTRUMENT DETECTED CLOUD LAYER
|
|
|
23
|
THIRD INSTRUMENT DETECTED CLOUD LAYER
|
|
|
24
|
FOURTH INSTRUMENT DETECTED CLOUD LAYER
|
|
|
62
|
VALUE NOT APPLICABLE
|
|
|
63
|
MISSING VALUE
|
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