When one hears the phrase, "wind shear is 20 knots over the hurricane", this typically refers ... is invisible on 200-850 mb wind shear analysis charts will often unexpectedly kill or weaken ...
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With 'extremely active' Texas hurricane season possible, here are the four stages to a hurricaneIf wind speeds increase to 64 knots, or 74 mph, then a tropical storm is upgraded to a hurricane. Hurricanes are at least 50,000 feet high and 125 miles across.
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