How to calculate the hourly wind direction: Difference between revisions
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The [[Wind_direction_(Heat_Overlay)|hourly wind direction]] from the table is presented in degrees and oriented towards the north, which means we can use it directly. | The [[Wind_direction_(Heat_Overlay)|hourly wind direction]] from the [[KNMI weather data]] table column ''DD'' is presented in degrees and oriented towards the north, which means we can use it directly. | ||
[[File:Tutorial_hourly_wind_direction_(Heat_Overlay).png]] | [[File:Tutorial_hourly_wind_direction_(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]'' | |||
|} | |||
{{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. | |||
|seealso= | |seealso= | ||
* [[Wind direction (Heat Overlay)]] | * [[Wind direction (Heat Overlay)]] | ||
* [[KNMI weather data]] | * [[KNMI weather data]] | ||
}} | }} | ||
[[Category:How-to's]] | |||
Latest revision as of 08:26, 5 February 2024
The hourly wind direction from the KNMI weather data table column DD is presented in degrees and oriented towards the north, which means we can use it directly.
.png)
| 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 [1] |
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.