1000 on average per year
There were 934 tornadoes recorded in the U.S. in 2002.
There were 1,103 recorded tornadoes in the U.S. in 2006.
1,282 tornadoes occurred in the US. in 2010, with an unknown number worldwide.
There were 1424 confirmed tornadoes in the U.S. in 1998, making it an active year.
tornadoes.
There were 11 confirmed tornadoes in Colorado in 1966. The actual number of tornadoes was probably much higher as at this point the majority of F0 tornadoes (which account for about 60% of all known tornadoes today) were missed.
In the latest five-year period (not counting 2011 as statistics are not finalized) the U.S. experienced 6329 tornadoes.
Sicily Tornadoes happened in 1851.
Tornadoes in the U.S. are called tornadoes.
Tornadoes have happened almost month of every year in the United States. If you are referring to the most recent outbreak of tornadoes it lasted from April 14-16, 2011. If you are asking about another incident, please be more specific.
There were 102 tornadoes in Oklahoma in 2010.
There were 987 recorded tornadoes in the U.S. in 1967. Note however that at this point in history the majority of weak tornadoes were missed and most tornadoes are weak. The actual number of tornadoes was probably much higher than this figure.