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| # | Column name | Meaning | Format and Details |
|---|---|---|---|
| 1 | wmo_id | WMO identifier number | |
| 2 | Year | UTC time zone; available if parse_ogimet() is used in the data argument | |
| 3 | Day | UTC time zone | |
| 4 | Hour | UTC time zone | |
| 5 | Cloud_base_height | Lowest cloud base height | String, intervals in meters |
| 6 | Visibility | Horizontal visibility | In m; 99 means “Less than 100 m”, 71000 means “> 70 km”; 49 means “< 50 m” and 51000 means “>= 50 km”. NA_character_ is returned when visibility is unknown (‘//’). |
| 7 | Total_cloud_cover | Total cloud cover | In oktas, 9 means “invisible by fog or other meteorological phenomenon”; “/” is treated as NA_real_ |
| 8 | Wind_direction | Wind direction | In tens of degree, 99 means “variable wind direction” |
| 9 | Wind_speed | Wind speed | The value and its unit are in different but contiguous columns |
| 10 | Wind_speed_unit | Wind speed unit | Either ‘m/s’ or ‘knots’ |
| 11 | Air_temperature | Air temperature | in degrees Celsius |
| 12 | Dew_point | Dew Point | in degrees Celsius (in very rare cases this group is replaced by the group “29UUU” to inform relative humidity instead of dew point; this feature is currently not supported and will lead to a wrong value) |
| 13 | Relative_humidity | Relative humidity according to Magnus-Tetens Equation | As a percentage |
| 14 | Station_pressure | Station pressure | in hPa |
| 15 | MSLP_GH | Mean sea level pressure or geopotential height | in hPa or gpm; for geopotential height, only pressure level 850 hPa, 700 hPa and 500 hPa are supported, the rest will lead to a wrong value |
| 16 | Pressure_tendency | 3-hour pressure tendency | in hPa |
| 17 | Charac_pressure_tend | Characteristic of pressure tendency during the three hours preceding the time of observation | Character, “Inc” means “Increasing” and “Dec” means “Decreasing” |
| 18 | Precipitation_S1 | Amount of precipitation informed in Section 1 | in mm (0.01 means trace precipitation) |
| 19 | Precip_period_S1 | “Precipitation_S1” fell in the last “Precip_period_S1” hours | in hours |
| 20 | Present_weather | Present weather | Character - Simplified decoding ; NSW stands for “No significant weather” |
| 21 | Past_weather1 | Past weather | Character - Simplified decoding; Period of time covered depends on the time of observation (e.g., six hours for observations at 0, 6, 12 and 18 UTC; three hours at 3, 9, 15 and 21 UTC) |
| 22 | Past_weather2 | Past weather | Character - Simplified decoding; Period of time covered depends on the time of observation (e.g., six hours for observations at 0, 6, 12 and 18 UTC; three hours at 3, 9, 15 and 21 UTC) |
| 23 | Cloud_amount_Nh | Total cloud cover from low clouds, or medium clouds if there are no low clouds | In oktas, 9 means “invisible by fog or other meteorological phenomenon” |
| 24 | Low_clouds_CL | Low clouds description | Not decoded; “/” is mapped to 10 |
| 25 | Medium_clouds_CM | Medium clouds description | Not decoded; “/” is mapped to 10 |
| 26 | High_clouds_CH | High clouds description | Not decoded; “/” is mapped to 10 |
| 27 | Max_temperature | Maximum temperature | in degrees Celsius - (period of time covered is determined by regional decision) |
| 28 | Min_temperature | Minimum temperature | in degrees Celsius - (period of time covered is determined by regional decision) |
| 29 | Ground_state | State of the ground without snow or ice | Character - Simplified decoding |
| 30 | Ground_temperature | Ground minimum temperature (from the previous night) | in degrees Celsius, integer |
| 31 | Snow_ground_state | State of the ground with snow or measurable ice cover | Character - Simplified decoding |
| 32 | Show_depth | Snow depth | in cm, for values between 1 and 996; 997 means “less than 0.5 cm” and is converted to 0.1 cm; 998 “Snow cover, not continuous” and 999 “Measurement impossible or inaccurate” are considered NA |
| 33 | Ev_Evt | Daily evaporation (ev) or evapotranspiration (evt) | in mm, only values < 40 mm are handled correctly |
| 34 | Sunshine_daily | Daily hours of sunshine, generally from the previos civil day | in hours |
| 35 | Positive_Net_Rad_last_24h | Positive net radiation during the previous 24 hours | in J / cm^2 |
| 36 | Negative_Net_Rad_last_24h | Negative net radiation during the previous 24 hours | in J / cm^2 |
| 37 | Global_Solar_Rad_last_24h | Global solar radiation during the previous 24 hours | in J / cm^2 |
| 38 | Diffused_Solar_Rad_last_24h | Diffused solar radiation during the previous 24 hours | in J / cm^2 |
| 39 | Downward_LongWave_Rad_last_24h | Downward long-wave radiation during the previous 24 hours | in J / cm^2 |
| 40 | Upward_LongWave_Rad_last_24h | Upward long-wave radiation during the previous 24 hours | in J / cm^2 |
| 41 | ShortWave_Rad_last_24h | Short-wave radiation during the previous 24 hours | in J / cm^2 |
| 42 | Net_ShortWave_Rad_last_24h | Net short-wave radiation during the previous 24 hours | in J / cm^2 |
| 43 | Direct_Solar_Rad_last_24h | Direct solar radiation during the previous 24 hours | in J / cm^2 |
| 44 | Sunshine_last_hour | Duration of sunshine in the past hour | in hours |
| 45 | Positive_Net_Rad_last_hour | Positive net radiation during the previous hour | in kJ / m^2 |
| 46 | Negative_Net_Rad_last_hour | Negative net radiation during the previous hour | in kJ / m^2 |
| 47 | Global_Solar_Rad_last_hour | Global solar radiation during the previous hour | in kJ / m^2 |
| 48 | Diffused_Solar_Rad_last_hour | Diffused solar radiation during the previous hour | in kJ / m^2 |
| 49 | Downward_LongWave_Rad_last_hour | Downward long-wave radiation during the previous hour | in kJ / m^2 |
| 50 | Upward_LongWave_Rad_last_hour | Upward long-wave radiation during the previous hour | in kJ / m^2 |
| 51 | ShortWave_Rad_last_hour | Short-wave radiation during the previous hour | in kJ / m^2 |
| 52 | Net_ShortWave_Rad_last_hour | Net short-wave radiation during the previous hour | in kJ / m^2 |
| 53 | Direct_Solar_Rad_last_hour | Direct solar radiation during the previous hour | in kJ / m^2 |
| 54 | Cloud_drift_direction | Direction of cloud drift | String indicating drift direction (using cardinal and intercardinal points) of low, medium and high clouds, respectively |
| 55 | Cloud_elevation_direction | Angle of elevation and direction of cloud | String indicating genera, direction and angle of elevation, respectively |
| 56 | Pressure_change_last_24h | Change of surface pressure over the last 24 hours | in hPa |
| 57 | Precipitation_S3 | Amount of precipitation informed in Section 3 | in mm (0.01 means trace precipitation) |
| 58 | Precip_period_S3 | “Precipitation_S3” fell in the last “Precip_period_S3” hours | in hours |
| 59 | Precipitation_last_24h | Total amount of precipitation during the 24-hour period ending at the time of observation | in mm (0.01 means trace precipitation, 999.8 means “999.8 mm or more”) |
| 60 | Cloud_layer_1 | Layer of cloud | String indicating cloud cover (in oktas), genera and cloud height in m |
| 61 | Cloud_layer_2 | Layer of cloud | String indicating cloud cover (in oktas), genera and cloud height in m |
| 62 | Cloud_layer_3 | Layer of cloud | String indicating cloud cover (in oktas), genera and cloud height in m |
| 63 | Cloud_layer_4 | Layer of cloud | String indicating cloud cover (in oktas), genera and cloud height in m |
‘Simplified decoding’ means it’s not exactly decoded as in the WMO Code Tables, but in a way that the description is not too long, for its inclusion in the data frame.
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.