How to calculate the hourly wind direction: Difference between revisions

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===Hourly wind direction===
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.
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.


[[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]''
|}


==Also see==
{{article end
For more information on the KNIM historical weather data table and how to download this information please go to the [[Tutorial dutch model attributes (Heat_Overlay)|Tutorial_dutch_model_attributes_(Heat_Overlay)]]
|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=
* [[Wind direction (Heat Overlay)]]
* [[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.

Tutorial hourly wind direction (Heat Overlay).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.

See also

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