Yes. Cincinnati has been hit by a number of tornadoes, including an F5.
WKRP in Cincinnati - 1978 Tornado - 1.12 was released on: USA: 5 February 1979
WKRP in Cincinnati - 1978 Tornado 1-12 was released on: USA: 5 February 1979
One possibility is that the nearest Doppler radar that might have detected the tornado is about 80 miles away from Cincinnati and very likely missed the tornado.
No. No tornado stronger than F5 has ever been recorded.
The deadliest tornado ever recorded was in Sandwip island of the coast of Bangladesh in1989.
The largest tornado in Oklahoma (and in fact the largest tornado ever recorded), was the El Reno, Oklahoma tornado of May 31, 2013. It was 2.6 miles wide.
The Hallam, Nebraska tornado of May 22, 2004 was the widest tornado ever recorded. It was 2.5 miles wide.
No. The widest tornado ever recorded was half that: 2.5 miles wide.
The largest tornado ever recorded was the El Reno, Oklahoma tornado of May 31, 2013. This tornado was 2.6 miles wide. Doppler radar measured a wind gust in the tornado at 296 mph, the second highest wind speed ever recorded in a tornado.
no
yes
Florida is not in tornado Alley, but it does get a lot of tornadoes, but they are generally not as strong as the ones in Tornado Alley.