About .05% of all tornadoes are rated F5 or EF5. Or, in other terms, about 1 tornado in every 2000.
The term "mini tornado" does not have an exact definition. It has been applied to a number of different phenomena. Some people have called small whirlwinds such as dust devils mini tornadoes. Such whirlwinds are not actual tornadoes but may superficially resemble them. News outlets in Australia and Europe may sometimes refer to the tornadoes they get as "mini tornadoes," even in instances of large, significant tornadoes. They equivocate like this because they are reluctant to admit that tornadoes occur in those areas. People may occasionally call small, weak tornadoes mini tornadoes.
Tornadoes.
Tornadoes in the U.S. are rated on the Enhanced Fujita scale (or the original Fujita scale fore tornadoes Prior to February 2007), which runs from EF0 at the weakest to EF5 at the strongest. Ratings are based on wind speed estimates derived from the severity of the damage done. About 60% of tornadoes are rated EF0.
To my knowledge that record is held by South Dakota, which experienced 67 tornadoes on June 24, 2003.
Yes, all 50 states have had tornadoes. New York averages 5 each year.
No. F4 and F5 tornadoes account for less than 1% of all recorded tornadoes. About 90% of tornadoes are rated F0 or F1.
No, about 1% percent of tornadoes are rated as violent EF4 or EF5). About 75-80% of tornadoes are rated as weak (EF0 or EF1).
About 1% of severe thunderstorms produce tornadoes.
About 89% of tornadoes are rated as weak (F0 or F1).
In the United States, strong tornadoes, counted as those rated F2 or higher, account for about 11% of all tornadoes.
Less than 1% of thunderstorms produce tornadoes.
Tornadoes usually strike in the afternoon or evening. Over 80 percent of tornadoes occur between 12:00 p.m. and 12:00 a.m.
There are Spinebusters F-Us F5s Leg lock and much more
About 4-5% of tornadoes are rated F3 or higher.
In the United States about 1% of thunderstorms produce tornadoes.
Based on data from 1991-2011 (when the number of tornadoes in the U.S. was accurately recorded) F4 and EF4 tornadoes averaged about 0.5% of all tornadoes.
Tornadoes can occur just about anywhere severe thunderstorms can but are very rare in a lot of places.