In all cases, an 'x' is used to denote a missing value.
| Variable abbreviation | Variable name | Units
| Variable abbreviation | Variable name | Units
|
|---|
| ggx_ms1 | Max 1sec gust | m/s
| Ptemp_F | Barometer temperature | degF
|
| P_ins | Station pressure as read | ins
| Ptemperature | Barometer temperature | degC
|
| Pstn | Station pressure | mb
| Pmsl_ins | MSL pressure | ins
|
| Pmsl | MSL pressure | mb
| PmslF | METFiDAS MSLP | mb
|
| Tdry_F | Dry bulb temperature | degF
| Twet_F | Wet bulb temperature | degF
|
| Tdew_F | Dew point | degF
| VP_ins | Vapour pressure | ins
|
| Tdry | Dry bulb temperature | degC
| Twet | Wet bulb temperature | degC
|
| Tdew | Dew point | degC
| VP | Vapour pressure | mb
|
| RH | Relative humidity | %
| Tx_F | Maximum temperature | degF
|
| Tn_F | Minimum temperature | degF
| Tg_F | Grass minimum temperature | degF
|
| Ts_F | Soil minimum temperature | degF
| Tx | Maximum temperature | degC
|
| Tn | Minimum temperature | degC
| Tg | Grass minimum temperature | degC
|
| Ts | Soil minimum temperature | degC
| Tc | Concrete minimum temperature | degC
|
| Tbar | Mean daily temperature | degC
| Tdiur | Daily temperature range | degC
|
| E5_F | 5cm soil temperature | degF
| E10_F | 10cm soil temperature | degF
|
| E6in_F | 6ins soil temperature | degF
| E20_F | 20cm soil temperature | degF
|
| E30_F | 30cm soil temperature | degF
| E50_F | 50cm soil temperature | degF
|
| E1m_F | 100cm soil temperature | degF
| E2ft_F | 2ft soil temperature | degF
|
| E4ft_F | 4ft soil temperature | degF
| E5 | 5cm soil temperature | degC
|
| E10 | 10cm soil temperature | degC
| E6in | 6ins soil temperature | degC
|
| E20 | 20cm soil temperature | degC
| E30 | 30cm soil temperature | degC
|
| E50 | 50cm soil temperature | degC
| E1m | 100cm soil temperature | degC
|
| E2ft | 2ft soil temperature | degC
| E4ft | 4ft soil temperature | degC
|
| N10 | Cloud cover | tenths
| N8 | Cloud cover | oktas
|
| dd_pt | Wind direction | compass point
| dd | Wind direction | degrees/10
|
| ff_f | Wind speed | Beaufort force
| ff_mph | Wind speed | mph
|
| ff_ms | Wind speed | m/s
| ff_kn | Wind speed | kn
|
| r38_ml | Run of wind 38 feet | miles
| row_38 | Run of wind 38 feet | km
|
| r25_ml | Run of wind 25 feet | miles
| row_25 | Run of wind 25 feet | km
|
| r10_ml | Run of wind 10 m | miles
| row_10 | Run of wind 10 m | km
|
| cc2_ml | Cup counter 2m | miles
| ggx_ml | Max 3 sec gust | mph
|
| ggx_ms | Max 3 sec gust | m/s
| ggx | Max 3 sec gust | kn
|
| cc2 | Cup counter 2m | km
| ww | Present weather | ww code
|
| sf | Snow or sleet falling | sf code
| sl | 50% snow cover at 09GMT | sl code
|
| th | Thunder heard | th code
| ha_1 | Hail any size seen | ha1 code
|
| ha | Hail of specific sizes seen | ha code
| VV_1 | Visibility | old visibility code
|
| VV | Visibility | new visibility code
| fg | Fog at 0900GMT | fg code
|
| ga | Today gale force winds | ga code
| RR_in | Rainfall 24h from 09GMT | ins ('tr' denotes less tha 0.005 ins)
|
| RR | Rainfall 24h from 09GMT | mm ('tr' denotes less tha 0.05 mm)
| Rdur | Rain duration from 09GMT | h
|
| rd | Rain day | 1 if 0.2 mm or more or precipitation, else 0
| wd | Wet day | 1 if 1.0 mm or more or precipitation, else 0
|
| vwd | Very wet day | 1 if 5.0 mm or more or precipitation, else 0
| R1_gl | Ground level rain from 09GMT | ins ('tr' denotes less tha 0.005 ins)
|
| R2_int | International raingauge rain from 09GMT | ins ('tr' denotes less tha 0.005 ins)
| RR_gl | Ground level rain from 09GMT | mm ('tr' denotes less tha 0.05 mm)
|
| RR_int | International raingauge rain from 09GMT | mm ('tr' denotes less tha 0.05 mm)
| af | Air frost | 1 if air minimum temperature <0 degC, else 0
|
| gf | Ground frost | 1 if grass minimum temperature <0 degC, else 0
| sof | Soil frost | 1 if soil minimum temperature <0 degC, else 0
|
| conf | Concrete frost | 1 if concrete minimum temperature <0 degC, else 0
| tx0 | Frost day | 1 if air maximum temperature <0 degC, else 0
|
| tx25 | Warm day | 1 if air maximum temperature >=25 degC, else 0
| tx30 | Hot day | 1 if air maximum temperature >=30 degC, else 0
|
| tn15 | Warm night | 1 if air minimum temperature >=15 degC, else 0
| sd_in | Total snow depth | ins
|
| fs_in | Fresh snow depth | ins
| sd_cm | Total snow depth | cm
|
| fs_cm | Fresh snow depth | cm
| smo_F | Solar maximum temperature in open air | degF
|
| smv_F | Solar maximum temperature in vacuo | degF
| smo | Solar maximum temperature in open air | degC
|
| smv | Solar maximum temperature in vacuo | degC
| sog_2 | State of ground | 2 digit code
|
| sog_1 | State of ground | 1 digit code
| sog | State of ground | No snow lying code
|
| sog_s | State of ground | With snow lying code
| sss | Sunshine duration | h
|
| s0 | Sunless day | 1 if sunshine total=0.0, else 0
| s12 | Sunny day | 1 if sunshine total >=12.0 h, else 0
|
| skz | Kipp-Zonen sunshine total | h
| pevap | Piche evaporation | ml
|
| tev_in | Tank evaporation | ins
| tev | Tank evaporation | mm
|
| srad_1 | Solar radiation | mWh/cm2
| srad | Solar radiation | MJ/m2
|
| Code | Current weather | Code | Current weather
| | 99 | Heavy thunderstorm with hail, small hail or snow pellets
| 98 | Thunderstorm combined with duststorm or sandstorm
|
| 97 | Thunderstorm, heavy, with rain and/or snow
| 96 | Moderate or slight thunderstorm with hail, small hail or snow pellets
|
| 95 | Moderate or slight thunderstorm with rain, and/or snow
| 94 | Moderate or heavy snow, or rain and snow mixed or hail at time of observation, with thunder in the past hour
|
| 93 | Slight snow, or rain and snow mixed or hail at time of observation, with thunder in the past hour
| 92 | Moderate or heavy rain at time of observation, with thunder in the past hour
|
| 91 | Slight rain at time of observation, with thunder in the past hour
| 90 | Moderate or heavy shower(s) of hail, with or without rain or rain and snow mixed
|
| 89 | Slight shower(s) of hail, with or without rain or rain and snow mixed
| 88 | Moderate or heavy shower(s) of snow pellets or small hail, with or without rain or rain and snow mixed
|
| 87 | Slight shower(s) of snow pellets or small hail, with or without rain or rain and snow mixed
| 86 | Moderate or heavy snow shower(s)
|
| 85 | Slight snow shower(s)
| 84 | Moderate or heavy shower(s) of rain and snow mixed
|
| 83 | Slight shower(s) of rain and snow mixed
| 82 | Violent showers of rain
|
| 81 | Moderate or heavy showers of rain
| 80 | Slight showers of rain
|
| 79 | Ice pellets
| 78 | Isolated star-shaped snow crystals
|
| 77 | Snow grains
| 76 | Ice crystals (diamond dust)
|
| 75 | Continuous fall of heavy snow
| 74 | Intermittent fall of heavy snow
|
| 73 | Continuous fall of moderate snow
| 72 | Intermittent fall of moderate snow
|
| 71 | Continuous fall of slight snow
| 70 | Intermittent fall of slight snow
|
| 69 | Moderate or heavy snow mixed with rain or drizzle
| 68 | Slight snow mixed with rain or drizzle
|
| 67 | Moderate or heavy freezing rain
| 66 | Slight freezing rain
|
| 65 | Continuous heavy rain
| 64 | Intermittent heavy rain
|
| 63 | Continuous moderate rain
| 62 | Intermittent moderate rain
|
| 61 | Continuous slight rain
| 60 | Intermittent slight rain
|
| 59 | Moderate or heavy rain and drizzle mixed
| 58 | Slight rain and drizzle mixed
|
| 57 | Moderate or heavy freezing drizzle
| 56 | Slight freezing drizzle
|
| 55 | Continuous heavy drizzle
| 54 | Intermittent heavy drizzle
|
| 53 | Continuous moderate drizzle
| 52 | Intermittent moderate drizzle
|
| 51 | Continuous slight drizzle
| 50 | Intermittent slight drizzle
|
| 49 | Fog depositing rime; sky and clouds invisible
| 48 | Fog depositing rime; sky and clouds visible
|
| 47 | Fog has begun or is getting thicker during the past hour; sky and clouds invisible
| 46 | Fog has begun or is getting thicker during the past hour; sky and clouds visible
|
| 45 | No appreciable change in fog during the past hour; sky and clouds invisible
| 44 | No appreciable change in fog during the past hour; sky and clouds visible
|
| 43 | Fog getting thinner in the past hour; sky and clouds invisible
| 42 | Fog getting thinner in the past hour; sky and clouds visible
|
| 41 | Fog in patches; visibility less than 1000 metres in some directions but not in others
| 40 | Fog visible at a distance, but no fog at the station in the past hour
|
| 39 | Heavy blowing snow - generally above eye level
| 38 | Slight or moderate blowing snow - generally above eye level
|
| 37 | Heavy drifting snow - generally low, i.e. below eye level
| 36 | Slight or moderate drifting snow - generally above eye level
|
| 35 | Severe duststorm or sandstorm - has begun or has increased during the past hour
| 34 | Severe duststorm or sandstorm - no appreciable change during the past hour
|
| 33 | Severe duststorm or sandstorm - has decreased during the past hour
| 32 | Slight or moderate duststorm or sandstorm - has begun or has increased during the past hour
|
| 31 | Slight or moderate duststorm or sandstorm - no appreciable change during the past hour
| 30 | Slight or moderate duststorm or sandstorm - has decreased during the past hour
|
| 29 | Thunderstorm (with or without precipitation) during the past hour but not at the time of observation
| 28 | Fog or ice fog during the preceding hour but not at the time of observation; the visibility is now at least 1000 metres in all directions
|
| 27 | Shower(s) of hail, or of rain and hail during the past hour but not at the time of observation
| 26 | Shower(s) of snow, or of rain and snow during the preceding hour but not at the time of observation
|
| 25 | Shower(s) of rain during the preceding hour but not at the time of observation
| 24 | Freezing drizzle or freezing rain; during the past hour but not at the time of observation
|
| 23 | Rain with snow or ice pellets, not falling as showers; during the past hour but not at the time of observation
| 22 | Snow, not falling as showers, during the past hour but not at the time of observation
|
| 21 | Rain (not freezing), not falling as showers, during the past hour but not at the time of observation
| 20 | Drizzle (not freezing) or snow grains during the past hour but not at the time of observation
|
| 19 | Funnel cloud(s) at or within sight of the station during the past hour or at the time of observation
| 18 | Squalls at or within sight of the station during the past hour or at the time of observation
|
| 17 | Thunderstorm, but no precipitation at the time of observation
| 16 | Precipitation within sight and within 5 km, reaching the ground or the surface of the sea, but not at the station
|
| 15 | Precipitation within sight and more than 5 km away, reaching the ground or the surface of the sea, but not at the station
| 14 | Precipitation within sight, not reaching the ground or the surface of the sea
|
| 13 | Lightning seen, but no thunder heard
| 12 | More or less continuous shallow 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
|
| 11 | Patches of shallow 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
| 10 | Mist; visibility more than 1000 metres in all directions and relative humidity more than 95 percent
|
| 09 | Duststorm or sandstorm within sight at the time of observation, or at the station during the past hour
| 08 | Well-developed dust or sand whirl(s) seen at or near the station during the past hour or at the time of observation, but no dust storm or sandstorm
|
| 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)
| 06 | Widespread dust in suspension in the air, not raised by the wind at or near the station at the time of observation
|
| 05 | Haze
| 04 | Visibility reduced by smoke, e.g. forest fires, industrial smoke or volcanic ash
|
| 03 | Cloud generally forming or becoming more developed during the past hour
| 02 | State of the sky generally unchanged during the past hour; this also applies when there has been no cloud during the past hour
|
| 01 | Cloud generally dissolving or becoming less developed during the past hour
| 00 | Cloud development not observed
|