| humidity |
relative_humidity |
Relative humidity is calculated from air (dry bulb) temperature and dewpoint temperature (whole percent) |
fraction |
% |
>=0,<=100 |
| precipitation_height |
precipitation |
total liquid precipitation (rain or melted snow) for past hour; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| precipitation_height_last_3h |
precipitation_3_hour |
3-hour total liquid precipitation (rain or melted snow) accumulation from FM12/SYNOP reports; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| precipitation_height_last_6h |
precipitation_6_hour |
6-hour total liquid precipitation (rain or melted snow) accumulation from FM12/SYNOP reports; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| precipitation_height_last_9h |
precipitation_9_hour |
9-hour total liquid precipitation (rain or melted snow) accumulation from FM12/SYNOP reports; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| precipitation_height_last_12h |
precipitation_12_hour |
12-hour total liquid precipitation (rain or melted snow) accumulation from FM12/SYNOP reports; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| precipitation_height_last_15h |
precipitation_15_hour |
15-hour total liquid precipitation (rain or melted snow) accumulation from FM12/SYNOP reports; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| precipitation_height_last_18h |
precipitation_18_hour |
18-hour total liquid precipitation (rain or melted snow) accumulation from FM12/SYNOP reports; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| precipitation_height_last_21h |
precipitation_21_hour |
21-hour total liquid precipitation (rain or melted snow) accumulation from FM12/SYNOP reports; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| precipitation_height_last_24h |
precipitation_24_hour |
24-hour total liquid precipitation (rain or melted snow) accumulation from FM12/SYNOP reports; a “T” in the measurement code column indicates a trace amount of precipitation (millimeters) |
precipitation |
mm |
>=0 |
| pressure_air_sea_level |
sea_level_pressure |
Sea level pressure (hectopascals) |
pressure |
hPa |
>=0 |
| pressure_air_site |
station_level_pressure |
Station pressure (hectopascals) |
pressure |
hPa |
>=0 |
| pressure_air_site_delta_last_3h |
pressure_3hr_change |
3-hour pressure change (hectopascals) |
pressure |
hPa |
>=0 |
| pressure_air_site_reduced |
altimeter |
Reduced pressure (hectopascals) |
pressure |
hPa |
>=0 |
| snow_depth |
snow_depth |
depth of snowpack on the ground (centimeters/m) |
length_short |
cm |
>=0 |
| temperature_air_mean_2m |
temperature |
2 meter (circa) Above Ground Level Air (dry bulb) Temperature (⁰C to tenths) |
temperature |
°C |
- |
| temperature_dew_point_mean_2m |
dew_point_temperature |
Dew Point Temperature (⁰C to tenths) |
temperature |
°C |
- |
| temperature_wet_mean_2m |
wet_bulb_temperature |
Wet bulb temperature (⁰C to tenths) |
temperature |
°C |
- |
| visibility_range |
visibility |
horizontal distance at which an object can be seen and identified (kilometers) |
length_medium |
km |
>=0 |
| wind_direction |
wind_direction |
Wind direction from true north using compass directions (e.g. 360=true north, 180=south, 270=west, etc.). Note: A direction of “000” is given for calm winds. (whole degrees) |
angle |
° |
>=0,<=360 |
| wind_gust_max |
wind_gust |
Peak short duration (usually < 20 seconds) wind speed (meters per second) that exceeds the wind_speed average |
speed |
m/s |
>=0 |
| wind_speed |
wind_speed |
Wind speed (meters per second) |
speed |
m/s |
>=0 |