| Code/Flag Figure |
Description |
Status |
|
0
|
Sky clear
|
Operational
|
|
1
|
Few
|
Operational
|
|
2
|
Scattered
|
Operational
|
|
3
|
Broken
|
Operational
|
|
4
|
Overcast
|
Operational
|
|
5
|
Reserved
|
Operational
|
|
6
|
Scattered/broken
((Many forecasts use scattered/broken or broken/overcast followed by cloud type(s)))
|
Operational
|
|
7
|
Broken/overcast
((Many forecasts use scattered/broken or broken/overcast followed by cloud type(s)))
|
Operational
|
|
8
|
Isolated
((Used on aviation charts to describe the cloud type Cb))
|
Operational
|
|
9
|
Isolated embedded
((Used on aviation charts to describe the cloud type Cb))
|
Operational
|
|
10
|
Occasional
((Used on aviation charts to describe the cloud type Cb))
|
Operational
|
|
11
|
Occasional embedded
((Used on aviation charts to describe the cloud type Cb))
|
Operational
|
|
12
|
Frequent
((Used on aviation charts to describe the cloud type Cb))
|
Operational
|
|
13
|
Dense
((Used on aviation charts to describe cloud that would cause sudden changes in visibility (less than 1 000 m)))
|
Operational
|
|
14
|
Layers
|
Operational
|
|
15
|
Obscured (OBSC)
|
Operational
|
|
16
|
Embedded (EMBD)
|
Operational
|
|
17
|
Frequent embedded
|
Operational
|
|
18-30
|
Reserved
|
Operational
|
|
31
|
Missing value
|
Operational
|