| 00 - 49 |
No precipitation at the station at the time of
observation |
| 00 - 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 09 and
17, during the preceding hour |
| Code Figure |
Meaning |
| No meteors except photometeors (00 - 03) |
| 00 |
Cloud development not observed or not observable |
Characteristic change of the state of sky during
the past hour |
| 01 |
Clouds generally dissolving or becoming less developed |
| 02 |
State of sky on the whole unchanged |
| 03 |
Clouds generally forming or developing |
| Haze, dust, sand or smoke (04 - 09) |
| 04 |
Visibility reduced by smoke,e.g. veldt or forest
fires, industrial smoke or volcanic ashes |
| 05 |
Haze |
| 06 |
Widespread dust in suspension in the air, not
raised by wind at or near the station at the time of observation |
| 07 |
Dust 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; or,
in the case of ships, blowing spray at the station |
| 08 |
Well-developed dust whirl(s) or sand whirl(s)
seen at or near the station during the preceding hour or at
the time of observation, but no duststorm or sandstorm |
| 09 |
Duststorm or sandstorm within sight at the time
of observation, or at the station during the preceding hour |
| 10 |
Mist |
|
| 11 |
Patches |
shallow fog or ice fog at the station, whether
on land or sea, not deeper than about 2 meters on land or 10
m at sea |
| 12 |
More or less continuous |
| 13 |
Lightning visible, no thunder heard |
| 14 |
Precipitation within sight, not reaching the
ground or the surface of the sea |
| 15 |
Precipitation 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 |
| 16 |
Precipitation within sight, reaching the ground
or the surface of the sea, near to, but not at the station |
| 17 |
Thunderstorm, but no precipitation at the time
of observation |
| 18 |
Squalls |
at or within sight of the station during the
preceding hour or at the time of observation |
| 19 |
Funnel cloud(s)** |
| 20 - 29 |
Precipitation, fog, ice fog or thunderstorm
at the station during the preceding hour but not at the time
of observation |
| 20 |
Drizzle (not freezing) or snow grains |
not falling as shower(s) |
| 21 |
Rain (not freezing) |
| 22 |
Snow |
| 23 |
Rain and snow or ice pellets |
| 24 |
Freezing drizzle or freezing rain |
| 25 |
Shower(s) of rain |
| 26 |
Shower(s) of snow, or of rain and snow |
| 27 |
Shower(s) of hail***, or of rain and hail |
| 28 |
Fog or ice fog |
| 29 |
Thunderstorm (with or withour precipitaion) |
| 30 - 39 |
Duststorm, sandstorm, drifting or blowing snow |
| 30 |
Slight 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 |
| 33 |
Severe 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 |
| 36 |
Slight or moderate drifting snow |
generally low (below eye level) |
| 37 |
Heavy drifting snow |
| 38 |
Slight or moderate blowing snow |
generally high (above eye level) |
| 39 |
Heavy blowing snow |
| 40 - 49 |
Fog or ice fog at the time of observation |
| 40 |
Fog 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 |
| 41 |
Fog or ice fog in patches |
| 42 |
Fog or ice fog, sky visible |
has become thinner during the preceding hour |
| 43 |
Fog or ice fog, sky invisible |
| 44 |
Fog or ice fog, sky visible |
no appreciable change during the preceding hour |
| 45 |
Fog or ice fog, sky invisible |
| 46 |
Fog or ice fog, sky visible |
has begun or has become thicker during the preceding
hour |
| 47 |
Fog or ice fog, sky invisible |
| 48 |
Fog, depositing rime, sky visible |
| 49 |
Fog, depositing rime, sky invisible |
| 50 - 99 |
Precipitation at the station at the time of observation |
| 50 - 59 |
Drizzle |
| 50 |
Drizzle, not freezing, intermittent |
Slight at time of observation |
| 51 |
Drizzle, not freezing, continuous |
| 52 |
Drizzle, not freezing, intermittent |
Moderate at time of observation |
| 53 |
Drizzle, not freezing, continuous |
| 54 |
Drizzle, not freezing, intermittent |
Heavy (dense) at time of observation |
| 55 |
Drizzle, not freezing, continuous |
| 56 |
Drizzle, freezing, slight |
| 57 |
Drizzle, freezing, moderate or heavy (dense) |
| 58 |
Drizzle and rain, slight |
| 59 |
Drizzle and rain, moderate or heavy |
| 60 - 69 |
Rain |
| 60 |
Rain, not freezing, intermittent |
Slight at time of observation |
| 61 |
Rain, not freezing, continuous |
| 62 |
Rain, not freezing, intermittent |
Moderate at time of observation |
| 63 |
Rain, not freezing, continuous |
| 64 |
Rain, not freezing, intermittent |
heavy at time of observation |
| 65 |
Rain, not freezing, continuous |
| 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 |
| 70 |
Intermittent fall of snowflakes |
Slight at time of observation |
| 71 |
Continuous fall of snowflakes |
| 72 |
Intermittent fall of snowflakes |
Moderate at time of observation |
| 73 |
Continuous fall of snowflakes |
| 74 |
Intermittent fall of snowflakes |
heavy at time of observation |
| 75 |
Continuous fall of snowflakes |
| 76 |
Diamond dust (without or without fog) |
| 77 |
Snow grains (without or without fog) |
| 78 |
Isolated star-like snow crystals (without or
without fog) |
| 79 |
Ice pellets |
| 80 - 99 |
Showery precipitation, or precipitation with
current or recent thunderstorm |
| 80 |
Rain shower(s), slight |
| 81 |
Rain shower(s), moderate or heavy |
| 82 |
Rain shower(s), violent |
| 83 |
Shower(s) of rain and snow, mixed, slight |
| 84 |
Shower(s) of rain and snow, mixed, moderate or
heavy |
| 85 |
Snow shower(s), slight |
| 86 |
Snow shower(s), moderate or heavy |
| 87 |
Shower(s) of snow pellets or small hail, with
or without rain or rain and snow mixed |
slight |
| 88 |
moderate or heavy |
| 89 |
Shower(s) of hail**** with or without rain or
rain and snow mixed not associated with thunder |
slight |
| 90 |
moderate or heavy |
| 91 |
Slight rain at time of observation |
Thunderstorm during the preceding hour but not
at time observation |
| 92 |
Moderate or heavy rain at time of observation |
| 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 |
| 95 |
Thunderstorm, slight or moderate, without hail***, but with
rain and/or snow at time of observation |
Thunderstorm at time observation |
| 96 |
Thunderstorm, slight or moderate, with hail*** at time of
observation |
| 97 |
Thunderstorm, heavy, without hail***, but with rain and/or
snow at time of observation |
| 98 |
Thunderstorm combined with duststorm or sandstorm at time
of observation |
| 99 |
Thunderstorm, heavy, with hail*** at time of observation |
Offsite Link Notification
