The long - term annual mean for the U.S. is roughly 1,300 tornadoes each year , though Grazulis estimates that the real total may be close to 1,800 .
1973 was the first year in which more than 1,000 tornadoes were verified in the United States .
The long - term annual mean for the United States is roughly 1,300 tornadoes each year , though Grazulis estimates that the real total may be close to 1,800 .
1973 was the first year in which more than 1,000 tornadoes were verified in the United States .