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en.wikipedia.org/wiki/Tropical_cyclone

A tropical storm is an organized system of strong thunderstorms with a defined surface circulation and maximum sustained winds ...

www.merriam-webster.com/dictionary/tropical%20storm

Define tropical storm: a tropical cyclone with strong winds of over 39 miles (63 kilometers) per hour but less than hurricane intensity.

www.nhc.noaa.gov/aboutgloss.shtml

Center: Generally speaking, the vertical axis of a tropical cyclone, usually defined by the location of minimum wind or minimum pressure. The cyclone center ...

www.dictionary.com/browse/tropical-storm

Tropical storm definition, a tropical cyclone of less than hurricane force. See more .

www.accuweather.com/en/weather-news/whats-the-difference-between-a/34388

Jul 22, 2010 ... These descriptions all refer to a weather formation that has potential to strengthen and organize into a substantial tropical storm, or even a ...

www.thoughtco.com/tropical-storm-definition-3444240

Oct 13, 2016 ... A tropical storm is a tropical cyclone with maximum sustained winds of at least 39 mph. Tropical storms are given official names once they ...

en.oxforddictionaries.com/definition/tropical_storm

Definition of tropical storm - a localized, very intense low-pressure wind system, forming over tropical oceans and with winds of hurricane force.

www.collinsdictionary.com/us/dictionary/english/tropical-storm

Tropical storm definition: a cyclone or area of low pressure in the tropics with spiralling winds of between 39 and... | Meaning, pronunciation, translations and ...

www.wunderground.com/hurricane/subtropical.asp

If a subtropical storm intensifies enough to have hurricane force winds, then it must have become fully tropical. The definition of a subtropical storm, according to ...