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Hurricanes are large tropical storms with heavy winds.
Introduction to Hurricanes Hurricanes are tropical cyclones in which winds reach constant speeds of 74 miles per hour or more, and blow in a large spiral around a relatively calm center he eye of the hurricane. Every year, these violent storms bring destruction to coastlines and islands in their erratic path. Every year, these violent storms bring destruc tion to coastlines and islands in their erratic path. Tropical Cyclones are formed when large areas of the ocean become heated and the air pressure over that area drops, this in turn causes thunderstorms and strong surface winds. A hurricane is a powerful, whirling storm that measures up to several hundred miles in diameter.