An Atlantic hurricane is a tropical cyclone that forms in the Atlantic Ocean. They usually happen in the summer or fall. To be called a hurricane, they must have winds of over 74 mph (119 km/hr) for at least one minute straight.
Storms that get intense enough are named from a pre-determined list. About ten storms are named each season. Of those, about 6 are hurricanes and maybe 2 of those are major hurricanes.
A major hurricane is a category 3, 4, or 5 storm. A category 3 storm means that the winds are 111 mph (178 mph). The worst, a category 5 storm has winds of 157 mph (252 km/h).
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