Tell me all about a tornado. I legit dunno what it is and didn't know what to put it under

11 Facts About Tornadoes. A tornado is as a rotating, funnel-shaped cloud that extends from a thunderstorm to the ground with whirling winds that can reach 300 mph. Damage paths of tornadoes can be in excess of one mile wide and 50 miles long. Tornadoes can accompany tropical storms and hurricanes once on land.