Table of contents:



About Codes

Some of the parameters use codes instead of values. The codes currently in the system are listed below.

Precip_past1h & precip_past24h

The parameters precip_past1h and precip_past24h returns the amount of precipitation within the given period in kg/m2 with the exception of the codes listed below. 

CodeValue
-0.1

traces of precipitation, less than 0.1 kg/m2

Snow_depth_man

The parameter snow_depth_manual returns the snow depth in cm with the exception of the codes listed below.

CodeValue
-1<0.5 cm

Wind_dir

The parameter wind_dir returns the direction from which the wind blows in degrees, where north is given as 360.

CodeValue
0calm

Cloud_cover

The parameter cloud_cover is reported in oktas (eights) and is the fraction of the sky covered by cloud of any type or height above the ground.

CodeValue
00 oktas - no clouds
101 okta or less, but not zero
252 oktas
403 oktas
504 oktas
605 oktas
756 oktas
907 oktas or more, but not 8 oktas
1008 oktas - full cloud cover with no breaks
112Sky obscured by fog and/or other meteorological phenomena


Weather

Codes 0-49      No precipitation at the station at the time of observation
Codes 0-19      No precipitation, fog, ice fog (except for 11 and 12), duststorm, sandstorm, drifting or blowing snow at the station at the time of observation or, except for 9 and 17, during the preceding hour.

CodesValue
0Cloud development not observed or not observableCharacteristic change of the state of sky during the past hour


1Clouds generally dissolving or becoming less developed
2State of sky on the whole unchanged
3Clouds generally forming or developing
4Visibility reduced by smoke, e.g. veldt or forest fires, industrial smoke or volcanic ashes
5Haze
6Widespread dust in suspension in the air, not raised by wind at or near the station at the time of observation
7Dust or sand raised by wind at or near the station at the time of observation, but no well developed dust whirl(s) or sand whirl(s), and no duststorm or sandstorm seen
8Well developed dust whirl(s) or sand whirl(s) seen at or near the station during the preceding hour or at the time ot observation, but no duststorm or sandstorm
9Duststorm or sandstorm within sight at the time of observation, or at the station during the preceding hour
10Mist
11Patchesshallow fog or ice fog at the station, whether on land or sea, not deeper than about 2 metres on land or 10 metres at sea
12More or less continuous
13Lightning visible, no thunder heard
14Precipitation within sight, not reaching the ground or the surface of the sea
15Precipitation within sight, reaching the ground or the surface of the sea, but distant, i.e. estimated to be more than 5 km from the station
16Precipitation within sight, reaching the ground or the surface of the sea, near to, but not at the station
17Thunderstorm, but no precipitation at the time of observation
18Squallsat or within sight of the station during the preceding hour or at the time of observation
19Funnel cloud(s) (tornado cloud or water-spout)

Codes 20-29  Precipitation, fog, ice fog og thunderstorm at the station during the preceding hour but not at the time of observation.

CodeValue
20Drizzle (not freezing) or snow grainsnot falling as shower(s)


21Rain (not freezing)
22Snow
23Rain and snow or ice pellets
24Freezing drizzle or freezing rain
25Shower(s) of rain
26Shower(s) of snow, or of rain and snow
27Shower(s) of hail*, or of rain and hail*
28Fog or ice fog
29Thunderstorm (with or without precipitation)

*Hail, small hail, snow pellets.

Codes 30-39    Duststorm, sandstorm, drifting or blowing snow

CodeValue
30Slight or moderate duststorm or sandstorm- has decreased during the preceding hour
31- no appreciable change during the preceding hour
32- has begun or has increased during the preceding hour
33Severe duststorm or sandstorm- has decreased during the preceding hour
34- no appreciable change during the preceding hour
35- has begun or has increased during the preceding hour
36Slight or moderate blowing snowgenerally low (below eye level)
37Heavy drifting snow
38Slight or moderate blowing snowgenerally high (above eye level)
39Heavy drifting snow

Codes 40-49    Fog or ice fog at the time of observations

CodeValue
40Fog or ice fog at a distance at the time of observation, but not at the station during the preceding hour, the fog or ice fog extending to a level above that of the observer
41Fog or ice fog in patches
42Fog or ice fog, sky visiblehas become thinner during the preceding hour
43Fog or ice fog, sky invisible
44Fog or ice fog, sky visibleno appreciable change during the preceding hour
45Fog or ice fog, sky invisible
46Fog or ice fog, sky visiblehas begun or has become thicker during the preceding hour
47Fog or ice fog, sky invisible
48Fog, depositing rime, sky visible
49Fog, depositing rime, sky invisible

Codes 50-99    Precipitation at the station at the time of observation

Code 50-59     Drizzle

CodeValue
50Drizzle, not freezing, intermittentslight at time of observation
51Drizzle, not freezing, continuous
52Drizzle, not freezing, intermittentmoderate at time of observation
53Drizzle, not freezing, continuous
54Drizzle, not freezing, intermittentheavy (dense) at time of observation
55Drizzle, not freezing, continuous
56Drizzle, freezing, slight
57Drizzle, freezing, moderate or heavy (dense)
58Drizzle and rain, slight
59Drizzle and rain, moderate or heavy

Codes 60-69    Rain

CodeValue
60Rain, not freezing, intermittentslight at time of observation
61Rain, not freezing, continuous
62Rain, not freezing, intermittentmoderate at time of observation
63Rain, not freezing, continuous
64Rain, not freezing, intermittentheavy at time of observation
65Rain, not freezing, continuous
66Rain, freezing, slight
67Rain, freezing, moderate or heavy (dense)
68Rain or drizzle and snow, slight
69Rain or drizzle and snow, moderate or heavy

Codes 70-79   Solid precipitation not in showers

CodeValue
70Intermittent fall of snowflakesslight at time of observation
71Continuous fall of snowflakes
72Intermittent fall of snowflakesmoderate at time of observation
73Continuous fall of snowflakes
74Intermittent fall of snowflakesheavy at time of observation
75Continuous fall of snowflakes
76Diamond dust (with or without fog)
77Snow grains (with or without fog)
78Isolated star-like snow crystals (with or without fog)
79Ice pellets

Codes 80-99   Showery precipitation, or precipitation with current or recent thunder

CodeValue
80Rain shower(s), slight
81Rain shower(s), moderate or heavy
82Rain shower(s), violent
83Shower(s) of rain and snow mixed, slight
84Shower(s) of rain and snow mixed, moderate or heavy
85Snow shower(s), slight
86Snow shower(s), moderate or heavy
87Shower(s) of snow pellets or small hail, with or without rain or rain and snow mixed- slight
88- moderate or heavy
89Shower(s) of hail, with or without rain or rain and snow mixed, not associated with thunder- slight
90- moderate or heavy
91Slight rain at time of observationThunderstorm during the preceding hour but not at time of observation
92Moderate or heavy rain at time of observation
93Slight snow, or rain and snow mixed or hail** at time of observation
94Moderate or heavy snow, or rain and snow mixed or hail** at time of observation
95Thunderstorm, slight or moderate, without hail** but with rain and/or snow at time of observationThunderstorm at time of observation
96Thunderstorm, slight or moderate, with hail** at time of observation
97Thunderstorm, heavy, without hail** but with rain and/or snow at time of observation
98Thunderstorm combined with duststorm or sandstorm at time of observation
99Thunderstorm, heavy, with hail** at time of observation

**Hail, small hail, snow pellets

Codes 100-199 Present weather reported from an automatic weather station

CodeValue
100No significant weather observed
101Clouds generally dissolving or becoming less developed during the past hour
102State of sky on the whole unchanged during the past hour
103Clouds generally forming or developing during the past hour
104Haze or smoke, or dust in suspension in the air, visibility equal to, or greater than 1km
105Haze or smoke, or dust in suspension in the air, visibility less than 1 km
106-109Reserved
110Mist
111Diamond dust
112Distant lightning
113-117Reserved
118Squalls
119Reserved

Codes 120-126 are used to report precipitation, fog (or ice fog) or thunderstorm at the station during the preceding hour but not at the time of observation.

CodeValue
120Fog 
121Precipitation
122Drizzle (not freezing) or snow grains
123Rain (not freezing)
124Snow
125Freezing drizzle or freezing rain
126Thunderstorm (with or without precipitation)
127Blowing or drifting snow or sand
128Blowing or drifting snow or sand, visibility equal to or greater than 1km
129Blowing or drifting snow or sand, visibility less than 1 km
130Fog
131Fog or ice fog in patches
132Fog or ice fog, has become thinner during the past hour
133Fog or ice fog, no appreciable change during the past hour
134Fog or ice fog, has begun or become thicker during the past hour
135Fog, depositing rime
136-139Reserved
140Precipitation
141Precipitation, slight or moderate
142Precipitation, heavy
143Liquid precipitation, slight or moderate
144Liquid precipitation, heavy
145Solid precipitation, slight or moderate
146Solid precipitation, heavy
147Freezing precipitation, slight or moderate
148Freezing precipitation, heavy
149Reserved
150Drizzle
151Drizzle, not freezing, sligt
152Drizzle, not freezing, moderate
153Drizzle, not freezing, heavy
154Drizzle, freezing, slight
155Drizzle, freezing, moderate
156Drizzle, freezing, heavy
157Drizzle and rain, slight
158Drizzle and rain, moderate or heavy
159Reserved
160Rain
161Rain, not freezing, slight
162Rain, not freezing, moderate
163Rain, not freezing, heavy
164Rain, freezing, slight
165Rain, freezing, moderate
166Rain, freezing, heavy
167Rain (or drizzle) and snow, slight
168Rain (or drizzle) and snow, moderate or heavy
169Reserved
170Snow
171Snow, slight
172Snow, moderate
173Snow, heavy
174Ice pellets, slight
175Ice pellets, moderate
176Ice pellets, heavy
177Snow grains
178Ice crystals
179Reserved
180Shower(s) or intermittent precipitation
181Rain shower(s) or intermittent rain, slight
182Rain shower(s) or intermittent rain, moderate
183Rain shower(s) or intermittent rain, heavy
184Rain shower(s) or intermittent rain, violent
185Snow shower(s) or intermittent snow, slight
186Snow shower(s) or intermittent snow, moderate
187Snow shower(s) or intermittent snow, heavy
188Reserved
189Hail
190Thunderstorm
191Thunderstorm, slight or moderate, with no precipitation
192Thunderstorm, slight or moderate, with rain showers and/or snow showers
193Thunderstorm, slight or moderate, with hail
194Thunderstorm, heavy, with no precipitation
195Thunderstorm, heavy, with rain shoers and/or snow showers
196Thunderstorm, heavy, with hail
197-198Reserved
199Tornado





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