| Code/Flag Figure |
Description |
Status |
|
0
|
Nil
(in cloud)
|
Operational
|
|
1
|
Light
(in cloud)
|
Operational
|
|
2
|
Moderate
(in cloud)
|
Operational
|
|
3
|
Severe
(in cloud)
|
Operational
|
|
4
|
Nil
(in clear air)
|
Operational
|
|
5
|
Light
(in clear air)
|
Operational
|
|
6
|
Moderate
(in clear air)
|
Operational
|
|
7
|
Severe
(in clear air)
|
Operational
|
|
8
|
Nil
(cloud/clear air not specified)
|
Operational
|
|
9
|
Light
(cloud/clear air not specified)
|
Operational
|
|
10
|
Moderate
(cloud/clear air not specified)
|
Operational
|
|
11
|
Severe
(cloud/clear air not specified)
|
Operational
|
|
12
|
Extreme, in clear air
|
Operational
|
|
13
|
Extreme, in cloud
|
Operational
|
|
14
|
Extreme, cloud/clear air not specified
|
Operational
|
|
15
|
Light, isolated moderate
|
Operational
|
|
16
|
Light, occasional moderate
|
Operational
|
|
17
|
Light, frequently moderate
|
Operational
|
|
18
|
Moderate, isolated severe
|
Operational
|
|
19
|
Moderate, occasional severe
|
Operational
|
|
20
|
Moderate, frequently severe
|
Operational
|
|
21
|
Severe, isolated extreme
|
Operational
|
|
22
|
Severe, occasional extreme
|
Operational
|
|
23
|
Severe, frequently extreme
|
Operational
|
|
24-62
|
Reserved
|
Operational
|
|
63
|
Missing value
|
Operational
|