This THLR Wind Wizard card is credit card sized and evolved from practical experience as demonstrated eloquently by Thomas Haugland.
We find his work stream and practical accuracy excellent. Thomas himself says that observing what the wind does to the vegetation is extremely effective up to 5-6 m/sec winds (capable of 0,5 msec resolution with experience), but above that he recommends using a Kestrel to get a better starting point.
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Quality
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Stäger Sport
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