Earth and Environment Atlas

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Phenomena

Tropical Cyclone

Meteorology

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A tropical cyclone is a rapidly rotating storm system with a low-pressure center, a closed low-level atmospheric circulation, strong winds and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depending on where it forms and its strength, the same kind of storm is called a hurricane in the Atlantic or northeastern Pacific, a typhoon in the northwestern Pacific, or simply a tropical cyclone in the Indian Ocean and South Pacific. On average around 80 to 90 named tropical cyclones form worldwide each year, more than half of which develop hurricane-force winds of 65 knots or more.

Cross-Tradition Connections

Associated With

Hurricane Katrina is one of the costliest and deadliest tropical cyclones in United States history.

Caused By

Tropical cyclones form and are steered by large-scale atmospheric circulation over warm ocean water.

Causes

Storm Surge, Phenomena

Storm surge is driven by the onshore wind stress and low atmospheric pressure of a landfalling tropical cyclone.

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