texas oklahoma kansas
The most tornado-prone area in the U.S. is Tornado Alley, which extends from northern Texas to Iowa. The worst portion of it covers parts of Oklahoma and Kansas.
The worst tornado in U.S. history was the Tri-State tornado of March 18, 1925. The tornado first formed north of Ellington, Missouri. The tornado devastated numerous towns in Missouri, Illinois, and Indiana along a path 219 miles long.
Spring is when the U.S. generally has the worst tornadoes.
Oklahoma.
Offically, the largest tornado on record struck near El Reno, Oklahoma on May 31, 2013. Radar and later damage surveys showed the tornado to be 2.6 miles wide.
1925. There were 794 tornado deaths in the U.S. that year, 695 from a single tornado.
The worst (or at least the deadliest) tornado to hit the U.S. was the Camilla, Georgia tornado of February 13, which killed 11 people.
The worst tornado in U.S. history caused damage in Missouri, Illinois, and Indiana. The worst tornado in world history (the Daulatpur-Salturia tornado) occurred in Bangladesh so it did not hit any states per se.
The widest tornado on record in the U.S. was the El Reno, Oklahoma tornado of May 31, 2013. it was 2.6 miles wide.
That would be the El Reno, Oklahoma tornado of May 31, 2013. At peak size the tornado was 2.6 miles wide.
The most tornado prone city in the U.S. is Oklahoma city.