How Do Hurricanes Form?
8. Storm to Hurricane
There are several stages of a storm before it is categorized as a hurricane. It starts from a tropical disturbance, which is basically a cluster of storm clouds. These will sometimes develop into a tropical depression and these, in turn, will develop into a tropical storm.
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At this point, the wind will be reaching 39 mph and this is also the point where the storm gets given a name. Tropical storms already have the potential to cause damage, although not nearly as much as a hurricane would. When the winds of the storm reach 74 mph, it is officially categorized as a hurricane.
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