How to calculate the hourly wind direction
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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.
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.