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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.
The basic difference between a tropical storm and a hurricane lies in the intensity of the cyclone. â¢ If the wind speeds of the cyclone are greater than 39 mph, it is referred to as a tropical storm. â¢ When the wind speeds become greater than 73 mph, the same cyclone becomes a hurricane (or a typhoon). â¢ When the wind speed remains below 38 mph, the cyclone is referred to as a tropical depression only.