Table 29 Wmo Synop Codes - Vaisala PWD22 User Manual

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Table 29 WMO SYNOP Codes (Table 4680, W
PWD22
SYNOP Codes Weather Types
00 Clear
04 Haze or smoke, or dust in suspension in the air, visibility
equal to, or greater than, 1 km
05 Haze or smoke, or dust in suspension in the air, visibility
less than 1 km
10 Mist
Code figures 20 to 25 are used, if precipitation or fog was observed during
the preceding hour but not at the time of observation
20 Fog
21 PRECIPITATION
22 Drizzle (not freezing) or snow grains
23 Rain (not freezing)
24 Snow
25 Freezing rain or freezing drizzle
The following code figures are used if precipitation or fog is observed at the
time of observation
30 FOG
31 Fog or ice fog, in patches
32 Fog or ice fog, has become thinner during the past hour
33 Fog or ice fog, no appreciable change during the past
hour
34 Fog or ice fog, has begun or become thicker during the
past hour
40 PRECIPITATION
41 Precipitation, slight or moderate
42 Precipitation, heavy
50 DRIZZLE
51 Drizzle, not freezing, slight
52 Drizzle, not freezing, moderate
53 Drizzle, not freezing, heavy
54 Drizzle, freezing, slight
55 Drizzle, freezing, moderate
56 Drizzle, freezing, heavy
60 RAIN
61 Rain, light
62 Rain, moderate
63 Rain, heavy
64 Rain, freezing, light
65 Rain, freezing, moderate
66 Rain, freezing, heavy
67 Rain (or drizzle) and snow, light
68 Rain (or drizzle) and snow, moderate or heavy
70 SNOW
71 Snow, light
72 Snow, moderate
73 Snow, heavy
74 Ice pellets, light
75 Ice pellets, moderate
76 Ice pellets, heavy
80 SHOWERS OR INTERMITTENT PRECIPITATION
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