| Code/Flag Figure |
Description |
Status |
|
0
|
Cloud covering 1/2 or less of the sky throughout the appropriate period
|
Operational
|
|
1
|
Cloud covering more than 1/2 of the sky during part of the appropriate period and covering 1/2 or less during part of the period
|
Operational
|
|
2
|
Cloud covering more than 1/2 of the sky throughout the appropriate period
|
Operational
|
|
3
|
Sandstorm, duststorm or blowing snow
|
Operational
|
|
4
|
Fog or ice fog or thick haze
|
Operational
|
|
5
|
Drizzle
|
Operational
|
|
6
|
Rain
|
Operational
|
|
7
|
Snow, or rain and snow mixed
|
Operational
|
|
8
|
Shower(s)
|
Operational
|
|
9
|
Thunderstorm(s) with or without precipitation
|
Operational
|
|
10
|
No significant weather observed
|
Operational
|
|
11
|
VISIBILITY REDUCED (see Note)
|
Operational
|
|
12
|
Blowing phenomena, visibility reduced
|
Operational
|
|
13
|
FOG (see Note)
|
Operational
|
|
14
|
PRECIPITATION (see Note)
|
Operational
|
|
15
|
Drizzle
|
Operational
|
|
16
|
Rain
|
Operational
|
|
17
|
Snow or ice pellets
|
Operational
|
|
18
|
Showers or intermittent precipitation
|
Operational
|
|
19
|
Thunderstorm
|
Operational
|
|
20-30
|
Reserved
|
Operational
|
|
31
|
Missing value
|
Operational
|