A tornado's 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: Aircraft Hawker Tornado, a single seat British fighter aircraft planned to be used during World War II B-45 Tornado, an American bomber aircraft Panavia Tornado, a family of twin-engine military aircraft XP-68 Tornado, a proposed version of the XP-54 Swoose Goose Automobiles Tornado (car company), a B… (More on Tornados)