Average windspeed at 30km altitude looks to be about 15 m/s which is certainly not nothing especially compared to average surface speeds. https://www.researchg

Average windspeed at 30km altitude looks to be about 15 m/s which is certainly not nothing especially compared to average surface speeds. https://www.researchgate.net/figure/Average-wind-speeds-in-m-s-vs-altitude-in-km-On-an-average-wind-speeds-are-minimum-in_fig1_328173177 https://www.researchgate.net/figure/Average-wind-speeds-in-m...