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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.
A storm is a violent disturbance, and most references to storms have to do with weather effects dominated by strong winds. The main types include the hailstorm, ice storm, rainstorm, snowstorm, thunderstorm, windstorm, cyclone, hurricane, and tornado. The first six types refer to violent winds accompanied by another feature. A hailstorm is weather system accompanied by a fall of hailstones, ice pellets that are larger than 0.2 inches (5 millimeters) in diameter. Even though ice is involved in both, an ice storm is different.