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While all are large storms of tropical nature, their official storm name has to do with its wind speeds.

When the storms are in their infant stages as just a general area of low pressure that has the potential to strengthen, they're usually given the name "Tropical Depression" It doesn't get a name like "Betty" or "Donald" just yet, instead, it gets a sequential number, like "Tropical Depression 3."

If the storm's peak winds become greater than 39 mph, then it's now a "tropical storm" and it gets a real name from the National Hurricane Center, like "Tropical Storm Barry."

If the storm continues to grow and reaches wind speeds over 74 mph, it's then a hurricane, but it keeps its identifying name for continuity sake.

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12y ago
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11y ago

A post-tropical storm is one that once was a tropical storm, but no longer has the main characteristics of a tropical cyclone--tight circular flow around a well-defined center (eye). Tropical storm (39+ mph) winds and heavy rain can continue.

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12y ago

A tropical storm has winds sustained of 39-73 mph. A hurricane has winds of 74 mph or higher.

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12y ago

Wind speed Winds in a Hurricane are 74 mph or stronger.

Winds in a tropical storm are 39-73 mph.

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10y ago

A tropical storm involves more rain and stronger winds as it is in the tropics.

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Q: What distinguishes a hurricane from a tropical storm?
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