What is wind shear?

Wind shear is a term given to upper level winds that blow from west to east against a west moving hurricane.  It tears up the hurricane’s clouds and stops tropical development.

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1. What is a tropical disturbance, tropical depression, tropical storm?
2. Should I tape my windows when a hurricane threatens?
3. What should I do during a hurricane watch vs a hurricane warning?
4. What do some of the words and acronyms mean when talking about hurricanes?
5. What is wind shear?
6. What are “Cape Verde” hurricanes?
7. Do I need to open my windows when a hurricane approaches?
8. Why are hurricanes named?
9. Does El Nino affect hurricanes?