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Maybe they have some safety altitude so they can drop to lower altitudes with other winds and come home when much wind is expected. Clouds often move in anothe
by anotheryou 10y ago
Maybe they have some safety altitude so they can drop to lower altitudes with other winds and come home when much wind is expected.
Clouds often move in another direction than the wind near the ground. (is that some eddy current?)
- mikeash 10y agoIt's wind shear. Wind at altitude tends to travel at right angles to the pressure gradient, as the coriolis force does its thing. Wind near the ground tends to travel directly from high pressure to low pressure, because of friction with the ground. That friction also tends to slow it down. Net result, it's common for wind to turn and increase in speed as you go up.