The wing can do some crazy stuff... dead calm at surface and 20+ mph at 100 ft. then another 200 ft up the wind can be going the opposite direction.

This is the type of stuff they call "wind shear." Sudden changes in wind speed and or direction with a minor altitude change. Normally its found in the vicinity of strong thermal activity or storm cells. (strong thermals plus a storm cell = thunderstom and you would be best not flying then)