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