Hurricanes and Tropical Cyclones
A hurricane or tropical cyclone is a warm storm system driven by thunderstorms near its center, feeding on the heat released when moist air rises and the water vapor in it condenses. The world cyclone lets us know that the storm has a rotating area at its core; its circulation is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Hurricanes can produce extremely strong winds, torrential rain, high waves, storm surge and even tornadoes. They form over bodies of warm water, and gradually lose strength over land, meaning coastal regions are mostly affected by hurricanes, while inland regions are relatively safe from receiving the extremely strong winds. Inland areas are also affected, heavy rains can produce major flooding, and storm surges can produce widespread flooding up to 30 km inland.
Hurricanes are graded according to their greatest winds using the Saffir-Simpson Hurricane Scale. A Category 1 storm has the lowest maximum winds, ranging between 119 and 153 kilometers per hour; while a Category 5 hurricane has wind speeds of over 249 kilometers per hour. The United States National Hurricane Center classify hurricanes of Category 3 and over as major hurricanes.
The U.S. Joint Typhoon Warning Center classifies West Pacific typhoons as tropical cyclones with winds greater than 118 km/h. Typhoons with wind speeds of at least 241 km/h, equivalent to a Category 4 hurricane, are dubbed Super Typhoons.
Many areas have hurricane warning systems, which are issued by weather forecasters at the National Hurricane Center when they have determined that hurricane conditions are expected in an area within a 24 hour period. These warnings are used to inform the public and marine interests of the storm's location, intensity, and movement.
Related Tags: weather, hurricanes, tropical cyclone, tornadoes
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