I used Windy almost daily for altitude wind, cloud base, & wind gusts. I find the accuracy is very good. I have to cross Turnagain Arm in Alaska 4 times a week. The crossing is less than 5 miles, however, it is the wind from the east that makes it very turbulent. I use windy to forecast the wind and gusts at different altitudes to find the best altitude for crossing, and also, my go/no go decision. In over 300 crossings, I've only had a few times of inaccuracy.

Best posts made by jessinak
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Windy accuracy
Latest posts made by jessinak
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Windy accuracy
I used Windy almost daily for altitude wind, cloud base, & wind gusts. I find the accuracy is very good. I have to cross Turnagain Arm in Alaska 4 times a week. The crossing is less than 5 miles, however, it is the wind from the east that makes it very turbulent. I use windy to forecast the wind and gusts at different altitudes to find the best altitude for crossing, and also, my go/no go decision. In over 300 crossings, I've only had a few times of inaccuracy.