Campbell CS120A, Instruction Manual

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D-1
Appendix D. Present Weather Codes
D1. SYNOP Codes produced by the CS125
56 codes are available.
Weather Type 4680 Code
No significant weather observed 00
Haze or smoke, or dust in suspension in the air, visibility ≥ 1 km*
04
Haze or smoke, or dust in suspension in the air, visibility < 1 km* 05
Mist 10
Fog (in the preceding hour) 20
Precipitation (in the preceding hour) 21
Drizzle (not freezing) or snow grains (in the preceding hour) 22
Rain (not freezing), (in the preceding hour) 23
Snow (in the preceding hour) 24
Freezing rain or freezing drizzle (in the preceding hour) 25
FOG 30
Fog or ice fog in patches 31
Fog or ice fog, has become thinner during the past hour 32
Fog or ice fog, no appreciable change during the past hour 33
Fog or ice fog has begun or become thicker during the past hour 34
Fog depositing rime 35
PRECIPITATION 40
Precipitation, slight or moderate 41
Precipitation, heavy 42
Solid precipitation, slight or moderate** 45
Freezing precipitation, slight or moderate** 47
Freezing precipitation, heavy** 48
DRIZZLE** 50
Drizzle, not freezing, slight 51
Drizzle, not freezing, moderate 52
Drizzle, not freezing, heavy 53
Drizzle, freezing, slight 54
Drizzle, freezing, moderate 55
Drizzle, freezing, heavy 56
Drizzle and rain, slight 57
Drizzle and rain, moderate or heavy 58
RAIN** 60
Rain, slight 61
Rain, moderate 62
Rain, heavy 63
Rain, freezing, slight 64
Rain, freezing, moderate 65
Rain, freezing, heavy 66
Rain (or drizzle) and snow, slight 67
Rain (or drizzle) and snow, moderate or heavy 68
SNOW** 70
Snow, slight (snow includes graupel) 71
Snow, moderate (snow includes graupel) 72
Snow, heavy (snow includes graupel) 73
Ice pellets, slight 74
Ice pellets, moderate 75
Ice pellets, heavy 76
Snow grains 77
SHOWER(S) OR INTERMITTENT PRECIPITATION 80
Rain shower(s) or intermittent rain, slight 81
Rain shower(s) or intermittent rain, moderate 82