User Manual

Appendix A. PWS100 Output Codes
Blowing or drifting
snow or sand, visibility
less than 1 km
29 DRSA /
BLSA /
DRSN /
BLSN
- - - -
FOG 30 FG - - - ≤1 km
Fog or ice fog, in
patches
31 BCFG - - - ≤1 km
Fog or ice fog, has
become thinner during
the past hour
32 FG - - - ≤1 km
Fog or ice fog, no
appreciable change
during the past hour
33 FG - - - ≤1 km
Fog or ice fog, has
begun or become
thicker during the past
hour
34 FG - - - ≤1 km
Fog, depositing rime 35 FZFG - - - ≤1 km
Reserved 36-39 - - - - -
PRECIPITATION 40 UP P P No Limit -
Precipitation, slight or
moderate
2
41 -UP / UP P- / P P- / P i<6.1
4
-
Precipitation, slight 41 -UP P- P-
i<1
4
-
Precipitation,
moderate
41 UP P P
1≤i<6.1
4
-
Precipitation, heavy 42 +UP P+ P+ i≥6.1
4
-
Liquid precipitation,
slight or moderate
2
43 -UP / UP P- / P P-/ P i<5.3
4
-
Liquid precipitation,
slight
43 -UP P- P-
i<1.3
4
-
Liquid precipitation,
moderate
43 UP P P
1.3≤i<5.3
4
-
Liquid precipitation,
heavy
44 +UP P+ P+ i≥5.3
4
-
Solid precipitation,
slight or moderate
2
45 -UP / UP P- / P P- / P i<6.7
4
-
Solid precipitation,
slight
45 -UP P- P-
i<1.5
4
-
Solid precipitation,
moderate
45 UP P P
1.5≤i<6.7
4
-
Solid precipitation,
heavy
46 +UP P+ P+ i≥6.7
4
-
A-3