This post is a question to the Weather Department:
I would be interested in knowing why, when it comes to tornadoes, shear is a necessary ingredient. In other words, with the right combination of atmospheric dynamics - moist air, instability, and shear - tornadoes can form.
Why then, does shear have the opposite effect upon the formation of hurricanes? In other words, tornadoes require shear but hurricanes are torn to pieces by it. I assume that it has to do with the level of the atmosphere at which the shear occurs.
Thanks in advance!
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