How to calculate the hourly wind speed: Difference between revisions
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The [[Wind_speed_(Heat_Overlay)|hourly wind speed]] from the [[KNMI weather data]] table column ''FH'' has to be divided by 10, since it is defined in 0.1 m/s. | |||
The [[Wind_speed_(Heat_Overlay)|hourly wind speed]] from the table has to be divided by 10, since it is defined in 0.1 m/s. | |||
[[File:Tutorial_hourly_wind_speed_(Heat_Overlay).png]] | [[File:Tutorial_hourly_wind_speed_(Heat_Overlay).png]] | ||
{| class="wikitable" | |||
! Column | |||
! Name | |||
! Unit | |||
! Dutch Description | |||
|- | |||
|2/B | |||
|YYYYMMDD | |||
|Date | |||
|''datum (YYYY=jaar,MM=maand,DD=dag)'' | |||
|- | |||
|3/C | |||
|HH | |||
|Hour | |||
|''tijd (HH=uur, UT.12 UT=13 MET, 14 MEZT. Uurvak 05 loopt van 04.00 UT tot 5.00 UT'' | |||
|- | |||
|4/D | |||
|DD | |||
|Degrees | |||
|''Windrichting (in graden) gemiddeld over de laatste 10 minuten van het afgelopen uur (360=noord, 90=oost, 180=zuid, 270=west, 0=windstil 990=veranderlijk. Zie http://www.knmi.nl/kennis-en-datacentrum/achtergrond/klimatologische-brochures-en-boeken'' | |||
|- | |||
|5/E | |||
|FH | |||
|0.1 m/s | |||
|''Uurgemiddelde windsnelheid (in 0.1 m/s). Zie http://www.knmi.nl/kennis-en-datacentrum/achtergrond/klimatologische-brochures-en-boeken'' | |||
|} | |||
{{article end | {{article end | ||
|notes= | |notes= | ||
* The values at each hour regard the measurement over the preceding hour up to that time. To obtain the value for 12:00 UTC, the values at 12:00 UTC must be used. | |||
* The wind speed ([[KNMI weather data#Hourly_wind_speed|hourly]], and [[KNMI weather data#Daily_average_wind_speed|daily average]]) can also be based on an other data source; ''Potentiele wind (UP)'': http://projects.knmi.nl/klimatologie/onderzoeksgegevens/potentiele_wind-sigma/. These values are often a few 0.1 m/s higher than the values from the historical KNMI weather data table. | * The wind speed ([[KNMI weather data#Hourly_wind_speed|hourly]], and [[KNMI weather data#Daily_average_wind_speed|daily average]]) can also be based on an other data source; ''Potentiele wind (UP)'': http://projects.knmi.nl/klimatologie/onderzoeksgegevens/potentiele_wind-sigma/. These values are often a few 0.1 m/s higher than the values from the historical KNMI weather data table. | ||
|seealso= | |seealso= | ||
* [[Wind speed (Heat Overlay)]] | |||
* [[KNMI weather data]] | * [[KNMI weather data]] | ||
}} | }} | ||
[[Category:How-to's]] | |||
Latest revision as of 08:27, 5 February 2024
The hourly wind speed from the KNMI weather data table column FH has to be divided by 10, since it is defined in 0.1 m/s.
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| Column | Name | Unit | Dutch Description |
|---|---|---|---|
| 2/B | YYYYMMDD | Date | datum (YYYY=jaar,MM=maand,DD=dag) |
| 3/C | HH | Hour | tijd (HH=uur, UT.12 UT=13 MET, 14 MEZT. Uurvak 05 loopt van 04.00 UT tot 5.00 UT |
| 4/D | DD | Degrees | Windrichting (in graden) gemiddeld over de laatste 10 minuten van het afgelopen uur (360=noord, 90=oost, 180=zuid, 270=west, 0=windstil 990=veranderlijk. Zie http://www.knmi.nl/kennis-en-datacentrum/achtergrond/klimatologische-brochures-en-boeken |
| 5/E | FH | 0.1 m/s | Uurgemiddelde windsnelheid (in 0.1 m/s). Zie http://www.knmi.nl/kennis-en-datacentrum/achtergrond/klimatologische-brochures-en-boeken |
Notes
- The values at each hour regard the measurement over the preceding hour up to that time. To obtain the value for 12:00 UTC, the values at 12:00 UTC must be used.
- The wind speed (hourly, and daily average) can also be based on an other data source; Potentiele wind (UP): http://projects.knmi.nl/klimatologie/onderzoeksgegevens/potentiele_wind-sigma/. These values are often a few 0.1 m/s higher than the values from the historical KNMI weather data table.