A tornado is a violent windstorm characterized by a funnel-shaped cloud. They can mainly come from cumulonimbus clouds. Tornadoes usually come in thunderstorms. Tornado may also refer to: Vehicles Tornado (sailboat), an Olympic class sailing catamaran Tornado (car company), a British automobile manufacturer active in the late 1950s and early 1960s Hawker Tornado, a single-seat British fighter aircraft planned to be used during World War II B-45 Tornado, an American bomber aircraft Panavi… (More on Tornados)