https://realclimatescience.com/2021/12/no-f5-winter-tornadoes-in-the-us-for-fifty-years/
The US has been hit by six F5 winter tornadoes since 1950, the last ones occurring fifty years ago.
1953-12-05 MS 1957-12-18 IL 1971-02-21 LA 1971-02-21 LA 1971-02-21 MS 1971-02-21 MS
1950-2019_all_tornadoes.csv (7.1 mb)
28 Feb 1971, 40 – The Odessa American at Newspapers.com
Illinois was hit by an F5 tornado on December 18, 1957.
