Originally Posted by
Iride01
There is even an overpass I travel routinely and on days with the wind blowing steady from the soutwest, I'll show a higher elevation going over it than days with no wind. I wonder if that is a localized reduction in air pressure because the wind is being funneled along that area at a higher velocity than air elsewhere. So Bernoulli's Principle might be another reason for errors in elevation or gain/loss calcs.
Yes, any wind blowing past the sensor reduces the static pressure, and the elevation shown will be high.
I've noticed this on climbs with lots of switchbacks. When I'm climbing a portion with a tailwind, the climbing rate number is steady. But when I round a hairpin and turn into the wind, I'll briefly see a burst of increased climbing rate.
Alas, it's only a brief and false moment of glory.