Close up footage of the 2011 El Reno tornado
The El Reno Piedmont tornado hit Oklahoma on May 24 2011 and was rated EF5. Doppler radar measured winds of over 338 km/h near the ground. It moved at around 42 to 48 km/h and traveled about 101 km in roughly one hour and 45 minutes. At its widest point it reached about 1.6 km across. The tornado killed 9 people and injured 181 others.