<p>I have wind data from a Met station (Speed and Direction), and I'm looking for a way to characterize a strong coherent wind. </p>

<p>AKA - Wind that averages 12 m/s out of the East for 2 days would have a different (higher) value than a 12 m/s wind that comes from multiple directions for 2 days. Is there an accepted method for this? If so, how is it calculated? </p>

CC BY-SA 4.0
2019-01-09T05:02:27.067Z
Don't know one... not sure why a varying direction wind be particularly significant to most people/circumstances, but ok. Would you consider a 12 m/s wind from continually varying directions to be more coherent than a 9 m/s wind consistently out of the east? Also how much of a angle change is significant... is a 10° change in direction very important? How about 15° (NNE vs NE?)? 45° (NE vs E)? How much/long of an abatement in speed reduces the score? Narrowing down your thoughts may help give a direction, though it seems anything may be fairly subjective in the end :-(
JeopardyTempest
CC BY-SA 4.0
2019-01-09T05:25:34.880Z
Thanks for the input- I realize there is the danger of biasing my results here, which was why I was seeing if there was a standardized way of measuring this. As far as a significant change in direction, I would be interested on the order of 45 degrees.
Vint
CC BY-SA 4.0
2019-01-09T08:08:10.410Z
The only thing that comes to mind is the [Wind Rose](https://en.wikipedia.org/wiki/Wind_rose) or Wind Rosette. They are a way of graphically displaying prevalent wind directions & wind strength. The ones I've seen have usually been created from measurements taken over a considerable length of time. From ; memory, I think they are produced for certain times of the day (0900 & 1500) & for season; so Spring 9am or Winter 3 pm.
Fred
<meteorology><wind>
What is the accepted measure for Wind Coherency (Strength and Direction)
Vint
# What is the accepted measure for Wind Coherency (Strength and Direction)

(Asked by: username_0 on 2019-01-09)

I have wind data from a Met station (Speed and Direction), and I'm looking for a way to characterize a strong coherent wind.

AKA - Wind that averages 12 m/s out of the East for 2 days would have a different (higher) value than a 12 m/s wind that comes from multiple directions for 2 days. Is there an accepted method for this? If so, how is it calculated?

**Tags:** meteorology, wind

> **Comments:**
> **username_1**: Don't know one... not sure why a varying direction wind be particularly significant to most people/circumstances, but ok. Would you consider a 12 m/s wind from continually varying directions to be more coherent than a 9 m/s wind consistently out of the east? Also how much of a angle change is significant... is a 10° change in direction very important? How about 15° (NNE vs NE?)? 45° (NE vs E)? How much/long of an abatement in speed reduces the score? Narrowing down your thoughts may help give a direction, though it seems anything may be fairly subjective in the end :-(  
> **username_0**: Thanks for the input- I realize there is the danger of biasing my results here, which was why I was seeing if there was a standardized way of measuring this. As far as a significant change in direction, I would be interested on the order of 45 degrees.  
> **username_2**: The only thing that comes to mind is the [Wind Rose](https://en.wikipedia.org/wiki/Wind_rose) or Wind Rosette. They are a way of graphically displaying prevalent wind directions & wind strength. The ones I've seen have usually been created from measurements taken over a considerable length of time. From ; memory, I think they are produced for certain times of the day (0900 & 1500) & for season; so Spring 9am or Winter 3 pm.  

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## 0 answers

