Yes. Though you are unlikely to survive if you don't take shelter, people have survived in buildings that have been struck by F5 and EF5 tornadoes. One advantage is that an F5 tornado only produces F5 damage in small portions of the overall path.
No. Florida has never recorded an F5 or EF5 tornado.
No. No tornado stronger than F5 has ever been recorded.
No. There have been no F5 tornadoes recorded in or near Ada.
Yes. Cincinnati has been hit by a number of tornadoes, including an F5.
Yes, there have been dozens of F5 Tornadoes. One of the most historic was in Oklahoma on May 3 1999.
It is unlikely. There has never been a recorded F5 tornado in Colorado.
It is possible but quite unlikely. No F5 or EF5 tornado has ever been recorded in the State of New York, but there have been a few F4 tornadoes. One tornado in Massachusetts in 1953 was possibly an F5.
An F5 tornado does not form directly from an F1 tornado. Tornado intensity is determined by the Enhanced Fujita Scale based on wind speeds and damage. It is possible for a tornado to rapidly intensify due to various atmospheric conditions, leading to an increase in intensity from an F1 to an F5 tornado.
The most recent F5/EF5 tornado was the Moore, Oklahoma tornado of May 20, 2013.
There are theoretical categories beyond F5 but none of theme have ever been used. Since F5 damage is total destruction there is no real way of rating a tornado higher than F5. Also, a tornado's rating is not dependent on its size. So a bigger tornado does not necessarily get a higher rating.
The Waco tornado was an F5.
The worst level a tornado can attain is F5 on the old Fujita scale or EF5 on the newer Enhanced Fujita scale.