The common term for a tornado that occurs over water is a "waterspout." Waterspouts typically form under certain meteorological conditions when cold air moves over warm water, causing a funnel-shaped cloud to develop. They can vary in intensity, sometimes resembling a weak tornado, while at other times becoming powerful vortexes that can pick up debris and cause damage. While they usually dissipate upon making landfall, they can produce strong winds and rough seas. Waterspouts are particularly common in tropical and subtropical areas, where warm waters and unstable air masses are prevalent.