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Best Answer: Tornado: A violently rotating column of air in contact with the ground or Water (WaterSpout) and extending from the base of a thunderstorm. Cyclone: An atmospheric closed circulation rotating counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The term hurricane is used for Northern Hemisphere tropical cyclones east of the International Dateline to the Greenwich Meridian.
Tropical Storm vs Hurricane. Hurricanes and tropical storms are both very large storms. They are both of a tropical nature, and the difference between them lies in the speed of the wind. Hurricanes and tropical storms start as a tropical depression. Tropical depressions start as a low pressure area over the ocean which has the potential to get larger and stronger.