Translations:Adventist Youth Honors Answer Book/Nature/Weather - Advanced/17/en
From Pathfinder Wiki
Most tornadoes have wind speeds of 177 km/h
or less, are approximately 75 meters across, and travel several kilometers before dissipating. Some attain wind speeds of more than 480 km/h, stretch more than 1.6 kilometers across, and stay on the ground for more than 100km.
