Tropical cyclone
A tropical cyclone is a rapidly rotating strom system characterized by a low pressure enter, a closed low-level atmospheric circulation, strong winds , and a spiral arrangement of thunderstorm that produce heavy rain. "Tropical" refers to the geographical origin of these systems, which form almost exclusively over tropical seas. "Cyclone" refers to their winds moving in a circle,[5] whirling round their central clear eye , with their winds blowing counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere . Tropical cyclones are typically between 100 and 2,000 km (62 and 1,243 mi) in diameter. The strong rotating winds of a tropical cyclone are a result of the conservation of angular momentum imparted by the Earth 's rotation as air flows inwards toward the axis of rotation. As a result, they rarely form within 5° of the equator. Tropical cyclones are areas of relatively low pressure in the troposp