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A tropical depression is a weak tropical cyclone wind sustained winds of less than 39 miles per hour. As the depression is fueled by moisture from warm ocean water it gains strength and becomes more organized. When wind speeds reach 39 mph it becomes a tropical storm. When they reach 74 mph it becomes a hurricane.

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Hurricane formation from weakest to strongest?

A hurricane will start as a Tropical Wave. It then becomes a Tropical Depression. A TD is given a number but not a name. Once the TD reaches 39 mile per hour winds its given a name and becomes a Tropical Storm. After reaching 74 mile per hour winds it becomes a hurricane.


Does a hurricane start a tropical depression?

No, a hurricane does not start as a tropical depression. A hurricane forms from a tropical cyclone, which originates as a tropical depression. Tropical depressions are the first stage of a developing tropical system, followed by tropical storms and then hurricanes if conditions are favorable.


Was hurricane Andrew a tropical depression?

Yes. Hurricane Andrew was Tropical Depression Three for about a day before becoming Tropical Storm Andrew and then Hurricane Andrew 5 days later.


How was Hurricane Andrew form?

it started as a tropical disturbance at first, then it became a tropical depression, and a tropical storm, then a hurricane.


How did hurricane Andrew form?

he started as a tropical depression, then he became a tropical storm, then BAM! hurricane...!


What are the types of storms that form before a hurricane forms?

Tropical disturbance -> tropical depression -> tropical storm -> tropical cyclone (hurricane). *Hurricane is a local name, for tropical cyclones (official name) that appear in the Atlantic.


What stages does a storm go through before it develops into a hurricane?

Tropical Depression and then Tropical Storm THEN Hurricane!


What is the differce between a tropical depression and a hurricane?

A tropical depression is a relatively weak tropical system, with sustained winds less than 39 mph. A hurricane is a powerful tropical system wind winds of at least 74 mph.


Is a tropical storm first a tropical depression then a hurricane?

The progression of increasing strength is: Tropical depression (under 39 mph winds) Tropical storm (39-73 mph winds) Hurricane (winds 74 mph or higher)


What is the name of the current tropical depression that is to become a hurricane?

There are currently no active tropical depressions. Also, tropical depressions are given numbers, not names. The next one in the Atlantic will be Tropical Depression Fourteen. There is however, a tropical disturbance labeled 95L that has a high chance of becoming a tropical depression.


When was Hurricane Katrina first identified?

Hurricane Katrina formed as Tropical Depression Twelve over the southeastern Bahamas on August 23, 2005 as the result of an interaction of a tropical wave and the remains of Tropical Depression Ten


Before becoming a hurricane what is it called?

A tropical storm. Before that it is usually a tropical depression.