A tornado is a violent, rotating column of wind, which can cause light to extreme damage. Tornadoes have winds that can reach of to 300 mph, the strongest occurring on May 3, 1999. The Fujita Scale was created in 1971 by Ted Fujita. The Enhanced Fujita Scale was created and put to use on February 1, 2007, ranging from EF0 to EF5. Typically, the most common tornadoes are usually rated EF0 or EF1, which makes up over 70% of the tornadoes during a year.