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Old January 5th 06, 05:02 PM posted to rec.aviation.piloting
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Default Why is wind directon expressed as "FROM"?

In article ,
Jose wrote:
Is it me, or is wind direction bass ackwards?

Vectors normally indicate direction an object is moving, but not so with
wind.

Why is that?


I suspect it's a holdover from weather. You don't care where wind is
going (for the purposes of weather prediction) but you do care where it
came from (as that gives hints as to what kind of airmass will be
arriving, and what it will bring with it). When wind is coming from New
Jersey, this tells you something. When wind is =going= to New Jersey,
it's their problem.


The usage probably predates aviation, but it certainly does come in
handy for pilots trying to pick the right runway to use. If the ATIS
says the wind is X, pick the runway numbered closest to X and you'll
have a headwind.