The Biggest of Oklahoma's Tornadoes

Oklahoma's largest tornadoes come in many shapes and sizes, but they are typically in the formation of a visible condensation funnel, whose narrow end touches the ground and is often encircled by a cloud of debris and dust. The most extreme ones can attain wind speeds of more than 300 miles per hour (480 km/h), are more than two miles (3 km) in diameter, and stay on the ground for dozens of miles (more than 100 km). Most have wind speeds less than 110 miles per hour (180 km/h), are about 250 feet (80 m) across, and travel a few miles (several kilometers) before dissipating.