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It varies. The United States averages between 8 and 9 F4 (now EF4 as of 2007) tornadoes per year. There is significant variation though, ranging from a low of 1 F4 tornado in 2005 to a high of 30 in 1974.

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12y ago

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When do voilent tornadoes occur?

Violent tornadoes (those rated F4 and F5) most often strike in late spring or early summer. However, they can occur at any time of year.


When do most violent tornadoes happen?

Most violent tornadoes (F4 and F5) occur in the months of March-June.


Do violent tornadoes occur in South Africa?

Yes. Tornadoes as strong as F4 have been recorded in South Africa.


Why is Florida not considered the tornado capital?

Although Florida has a very high concentration of tornadoes, they generally are not as strong or as destructive as the ones that occur in Tornado Alley. For example, since official records began in 1950 Florida has had 2 F4 tornadoes and no F5 tornadoes. By comparison Oklahoma has had 57 F4 tornadoes and 6 F5 tornadoes.


What is the percent of tornadoes are F4?

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.


Who invented the F4 tornado?

Nobody invented tornadoes of any sort; they occur naturally. The Fujita scale, which rates tornadoes from F0 to F5 was crated by Tetusya Fujita.


Do tornadoes occur in Ontario?

Yes. Tornadoes, some of them devastating, can and do occur in Ontario. Two notable ones are the Windsor F3 tornado of April 3, 1974 Barrie F4 tornado of May 31, 1985.


What percentage of tornadoes are rated at F4 or higher?

About 1.1% of tornadoes are rated F4, and less than .1% are rated F5.


What percentage of tornadoes are F5 and F4?

A little more than 1% of tornadoes are rated F4 and F5 with F5 tornadoes being less than 0.1%


When do tornadoes occur often?

they occur in spring and summer time


How often do tornadoes occur in Victoria?

It is very very rare that they will occur maybe 12 tornadoes a year


Do tornadoes occur in NY?

Yes, tornadoes can occur in New York. While less common than in the central US "Tornado Alley", New York does experience tornadoes, with an average of 9 tornadoes touching down each year in the state.