Where was the world's biggest tornado?

Answer 1

The largest tornado of 2008 in terms of path width, the standard measure of a tornado's size, occurred east of Pardeeville, Wisconsin on June 7. Despite only earning a rating of EF2, the multivortex tornado had a peak path width of 2 miles.

The highest rated tornado, though not the largest, was the EF5 tornado that hit Parkersburg, Iowa and killed 9 people. It had a peak path width of 1.2 miles.

Answer 2

The largest tornado on record hit near El Reno, Oklahoma on May 31, 2013. It was 2.6 miles wide.

Answer 3

The world's biggest tornado, in terms of width, was the El Reno tornado that struck Oklahoma, USA, on May 31, 2013. It had a maximum width of 2.6 miles (4.2 km).