A tornado is a violent windstorm characterized by a funnel-shaped cloud. They can mainly come from cumulonimbus clouds.Tornado may also refer to: Tornado, West Virginia, United States Vehicles Tornado , an Olympic class sailing catamaran Tornado , 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 Ame