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Abbreviations and codes used in the observer's diary

Table 3: Present weather code and appropriate Beaufort letters or symbols (download PDF version)

Miscellaneous Phenomena
State of Sky
Total Cloud
CodeBeaufortDescription
Cloud cover measured in octans
(eights of the sky)
0 - 2/8 b 0 to 2 octans
3/8 - 5/8 bc 3 to 5 octans
6/8 - 8/8 c 6 to 8 octans
8/8 oUniform thick layer completely covering sky
01Clouds generally dissolving or becoming less developed
02State of sky generally unchanged
03Clouds generally forming or developing
04 Beaufort Visibility reduced by smoke (e.g. industrial smoke, forest fires)
05 z Haze
06 Beaufort Widespread dust in suspension in the air (NOT raised by wind) at or near station
07Beaufort Dust or sand raised by the wind but no well developed dust- or sand-whirl(s), at or near station
08Beaufort Well developed dust- or sand-whirl(s) at or near station, but no dust- or sand-storm seen
09 jkz Dust- or sand-storm within sight of the station
10 m Mist
fs Shallow fog (or ice fog) at station, not deeper than 2m. over land or 10m. over sea
11 -- in patches
12 -- more or less continuous
13Beaufort Lightning seen (but NO thunder heard)
jp Precipitation in sight (but not at station)
14 -- NOT reaching the ground or surface of sea
15 -- reaching the ground or surface of the sea, but at a distance of not less than about 3 miles
16 -- reaching the ground or surface of the sea near to (but not at) the station
17 t Thunderstorm WITHOUT precipitation at the station
18 q Squalls at or within sight of the station
19 Funnel cloud(s) (e.g. water-spout, tornado cloud) at or within sight of the station
Phenomena ceased during the proceeding hour
20 Drizzle (not freezing) OR snow grains
21 Rain (not freezing)
22 Snow (in flakes)
23 Rain and snow (sleet) OR ice pellets
24 Freezing drizzle OR freezing rain
25 Shower(s) of rain
26 Shower(s) of snow (in flakes) OR of snow and rain (sleet)
27 Shower(s) of hail, small hail OR of rain and hail
28 Fog (or ice fog), i.e. visibility LESS THAN 1000m due to water particles or ice crystals
29 Thunderstorm (with OR without precipitation)
SAND OR DUST STORMS
kzoSlight
kz or Moderate
30 has decreased in the past hour
31 no appreciable change
32 has begun or increased in the past hour
KZ Severe
33 has decreased in the past hour
34 no appreciable change
35 has begun or increased in the past hour
DRIFTING or BLOWING SNOW
36 ↓ksoSlight
↓ks or Moderate drifting snow, generally low
37 ↓KS Heavy drifting snow, generally low
38 ↑ksoSlight
↑ks or Moderate blowing snow, generally high
39 ↑KS Heavy blowing snow, generally high
FOG (or ICE FOG)
The Beaufort letter for fog depends upon its density:
0 m - 199 m = F ; 200 m -999 m = f
40 jf Fog at a distance (not at station in past hour)
Visibility LESS THAN 1000m due predominantly to water droplets (or ice crystals)
41 if Fog in patches
Has become THINNER in past hour
42 sky/clouds discernible
43 sky/clouds obscured
No appreciable change in preceeding hour
44 sky/clouds discernible
45 sky/clouds obscured
Has formed or become THICKER in preceding hour
46 sky/clouds discernible
47 sky/clouds obscured
FOG DEPOSITING RIME
48 sky/clouds discernible
49 sky/clouds obscured
DRIZZLE
Slight
50 ido intermittent
51 dodocontinuous
Moderate
52 id intermittent
53 dd continuous
Heavy
54 iD intermittent
55 DD continuous
FREEZING DRIZZLE
56 Beaufort slight
57Beaufort moderate or heavy
DRIZZLE with RAIN
58 doro slight
59 dr moderate
DR or heavy
RAIN
Slight
70 iro intermittent
71 soso continuous
Moderate
72 is intermittent
73 SS continuous
Heavy
74 iS intermittent
75 SS continuous
FREEZING RAIN
66 Beaufortslight
67 Beaufortmoderate or heavy
RAIN (or drizzle) WITH SNOW (SLEET)
68roso or dososlight
69rs or ds moderate
RS or DS or heavy
SNOW (FLAKES)
70isointermittent
71sosocontinuous
Moderate
72isintermittent
73sscontinuous
Heavy
74iSintermittent
75SScontinuous
SNOW GRAINS, ICE PELLETS etc
76 Beaufort Ice prisms
77 sh Snow grains
78 Beaufort Isolated star-like snow crystals
79 Beaufort Ice pellets
SHOWER(S)
of RAIN
80 pro slight
81 pr moderate
PR or heavy
82 PR violent
of RAIN and SNOW (SLEET)
83 proso slight
84 prs moderate
PRS or heavy
of SNOW (FLAKES)
85 pso slight
86 ps moderate
PS or heavy
of SNOW PELLETS, or SMALL HAIL with or without rain or sleet
87 Beaufort slight
88 Beaufort moderate or heavy
of HAIL with or without rain or sleet
89 pho slight
90 ph moderate
PH or heavy
THUNDERY CONDITIONS
A thunderstorm without any precipitation is reported by code figure 17
Thunderstorm CEASED in past hour: PRECIPITATION CONTINUING
91 slight rain
92 moderate/heavy rain
93 slight snow/sleet/hail
94 mod/heavy snow/sleet/hail
THUNDERSTORM WITH PRECIPITATION both at time of observation
Thunderstorm* with ...
95 tiro(So) rain and/or snow (flakes), slight
95 tir(S) or moderate
96 tlho hail**, slight
96 tlh or moderate
97 TLR(S) rain and/or snow (flakes), heavy
98 tlkz dust- or sand-storm
99 TLH hail**, heavy
*The intensity refers to thundery conditions not to the precipitation
**Hail here includes hail, small hail and snow pellets
bullet All tables of weather codes and abbreviations

bullet Beaufort Weather Codes

Full list of present weather symbols


 

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