User Manual

Appendix A. PWS100 Output Codes
Clouds generally
dissolving or becoming
less developed during
the past hour
01 - - - - -
State of sky on the
whole unchanged
during the past hour
02 - - - - -
Clouds generally
forming or developing
during past hour
03 - - - - -
Haze or smoke, or dust
in suspension in the
air, visibility equal to,
or greater than, 1 km
04 HZ / FU /
VA / DU
- - - ≥1 km
Haze or smoke, or dust
in suspension in the
air, visibility less than
1 km
05 HZ / FU /
VA / DU
- - - <1 km
Reserved 06-09 - - - - -
Mist 10 BR - - - 1 km<r≤10 km
Diamond dust 11 IC IC IC - <0.1 mm
Distant lightning 12 - - - - -
Reserved 13-17 - - - - -
Squalls 18 SQ - - - -
Reserved 19 - - - - -
Fog 20 - - - - ≤1 km
PRECIPITATION 21 - - - No Limit -
Drizzle (not freezing)
or snow grains
22 - - - No Limit ≤0.5 mm
Rain (not freezing) 23 - - - No Limit >0.5 mm
Snow 24 - - - No Limit >0.5 mm
Freezing rain or
freezing drizzle
25 - - - No Limit -
Thunderstorm (with or
without precipitation)
26 - - - - -
BLOWING OR
DRIFTING SNOW OR
SAND
27 DRSA /
BLSA /
DRSN /
BLSN
- - - -
Blowing or drifting
snow or sand, visibility
equal to, or greater
than, 1 km
28 DRSA /
BLSA /
DRSN /
BLSN
- - - -
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