30-39 
Duststorm, sandstorm or drifting snow 
30 Slight ‘or moderate duststorm or Has decreased dur- 
sandstorm ing preceding hour 
31 Slight or moderate duststorm or ay appreciable 
change during 
sondstorm preceding bour 
32 Slight or moderate duststorm or Has increased dur- 
sandstorm ing preceding bour 
Has decreased dur- 
ing preceding hour 
No appreciable 
change during 
preceding hour 
——————————————————— anaes 
35 Severe duststorm or sand storm ae a a 
33 Severe duststorm or sandstorm 
34 Severe duststorm or sandstorm 
36 Slight or moderate drifting snow 
37 Heavy drifting snow Generally low 
gi aly be eee eens ARI 
38 Slight or moderate drifting snow ‘ 
39 Heavy drifting snow Generally bigh 
40-49 
Fog at the time of observation 
40 Fog at a distance at the time of 
observation, but not at the ship dur- 
ing the last hour, the fog extending 
to a level above that of the observer 
aS 
41 Fog in patches 
Has become 
thinner during 
preceding hour 
No appreciable 
change during 
preceding bour 
42 Fog, sky discernible 
43 Fog, sky not discernible 
44 Fog, sky discernible 
45 Fog, sky not discernible 
Has begun or bas 
become thicker 
during preceding 
bour 
46 Fog, sky discernible 
47 Fog, sky not discernible 
48 Fog, depositing rime, sky discernible 
49 Fog, depositing rime, sky not dis- 
cernible 
50 - 99 precipitation at the ship at the 
time of observation 
50 - 59 
Drizzle at time of observation 
50 Drizzle, not freezing, intermittent Slight at time of 
51 Drizzle, not freezing, continuous observation 
52 Drizzle, not freezing, intermittent 
53 Drizzle, not freezing, continuous 
Moderate at time 
of observation 
54 Drizzle, not freezing, intermittent Thick at tine. of 
55 Drizzle, not freezing, continuous observation 
56 Drizzle, freezing, slight 
57 Drizzle, freezing, moderate or thick 
58 Drizzle and rain, slight 
59 Drizzle and rain, moderate or heavy 
60 - 69 
Rain at time of observation 
60 Rain, not freezing, intermittent Slight at time of 
61 Rain, not freezing, continuous observation 
62 Rain, not freezing, intermittent 
63 Rain, not freezing, continuous 
Moderate at time 
of observation 
64 Rain, not freezing, intermittent Heavy at time of 
65 Rain, not freezing, continuous observation 
66 Rain, freezing, slight 
67 Rain, freezing, moderate or heavy 
68 Rain or drizzle and snow, slight 
69 Rain or drizzle and snow, moderate 
or heavy 
70-79 
Solid precipitation not in showers at time of observation 
70 Intermittent fall of snow flakes Slight at time of 
71 Continuous fall of snow flakes observation 
72 Intermittent fall of snow flakes 
73 Continuous fall of sffow flakes 
Moderate at time 
of observation 
74 Intermittent fall of snow flakes Heavy at time of 
75 Continuous fall of snow flakes observation 
76 Ice needles (with or without fog) 
77 Granular snow (with or without fog) 
78 Isolated starlike snow crystals (with 
or without fog) 
79 Ice pellets 
80-99 
Showery precipitation, or precipitation with current or recent 
thunderstorm 
Rain shower(s), slight 
Rain shower(s), moderate or heavy 
Rain shower(s), violent 
Shower(s) of rain and snow mixed, 
slight 
84 Shower(s) of rain and snow mixed, 
moderate or heavy 
85 Snow shower(s), slight a 
86 Snow shower(s), moderate or heavy 
87 Shower(s) of soft or small hail with 
or without rain or rain and snow, 
slight 
88 Shower(s) of soft or small hail with 
or without rain or rain and snow 
mixed, moderate or heavy 
89 Shower(s) of hail with or without 
roin or rain and snow mixed, not - 
associated with thunder, slight 
Shower(s) of hail, with or without 
rain or rain and snow mixed, not 
associated with thunder, moderate or 
heavy 
PR hd ES a a Ee i 
91 Slight rain at time of observation 
92 Moderate or heavy rain at time of 
observation Thunderstorm | 
93 Slight snow or rain and snow mixed 
or hail * at time of observation 
94 Moderate or heavy snow, or rain 
and snow mixed or hail* at time 
of observation 
B82S 
3 
time of observation 
95 Thunderstorm, slight or moderate, 
without hail “ but with rain and/or 
snow at time of observation 
96 Thunderstorm, slight or moderate, 
with hail * at time of observation 
97 Thunderstorm, heavy, without hail*  Tpunsderstorm 
but with rain and/or snow at time at time of 
of observation observation 
$8 Thunderstorm combined with dust- 
storm or sandstorm at time of ob- 
servation 
99 Thunderstorm, heavy, with hail * at 
time of observation 
* Hail, small hail, soft hail. 
a~ 
