It varies with the tornado. The very weakest of tornadoes have winds estimated at 65 mph (105 km/h). The very strongest have winds over 300 mph (480 km/h), though tornadoes this strong are extremely...
In simple terms pressure differences create wind. As a general rule, the more the pressure changes over a given distance, the faster the wind. Tornadoes are small in weather terms, but have extremely...
301 mph on May 3, 1999 near Oklahoma Cityis the fastest wind ever directly measured in a tornado. Other tornadoes may have been stronger but did not have their winds measured.