Answer: Tornado
Notes: A waterspout is a tornado-like column of rotating air that forms over water. Waterspouts are similar to tornadoes, but are usually smaller and less intense. They can be just as dangerous as tornadoes. Waterspouts are formed when cold air moves across warm water, creating a large temperature difference. They can last from two to twenty minutes and move at speeds of 10 to 15 knots.
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