According to Bernoulli's equation if a fluid gains speed its subject to less pressure and exerts less pressure consequently. Would this not mean that for a mass of air that is flowing between two layers of still air, the moving air (or let's call it wind) would be subject to atmospheric pressure from above and below that is greater than the wind's pressure? And would the still air not crush the wind? How can any type of air flow with less pressure than the corresponding atmospheric pressure at that altitude exist, since it would be crushed by the still air?
I hope my question makes sense and is logically consistent.