Since official records began in 1950 the U.S. has recorded approximately 61,000 tornadoes. Records prior to that are more difficult to track down. Similarly, records for other countries are incomplete.
Since official record began in 1950, California has had 404 recorded tornadoes up through the year 2013. The actual number of tornadoes is likely much higher, as many of the less intense tornadoes went without being recorded.
There were 26 recorded tornadoes in North Carolina in 2010.
There were three tornadoes there in 1960. The National Weather Service records two F2 tornadoes in Moore, OK, on April 28, 1960, and an F2 tornado in Moore, OK, on May 16, 1960. See link attached below. Since records began in 1950 there have been 12 recorded tornadoes in Moore.
It varies. Many days go without a single recorded tornado, while in some major tornado outbreaks, over 100 tornadoes may touch down in a day. To further complicate the issue, many tornadoes in developing nations or in sparsely populate areas go unreported. Based on tornadoes that are recorded though, there is an overall mean of 3 to 4 tornadoes per day, though few days actually see that number of tornadoes.
Tornadoes have been happening from the beginning from our planet's birth. Since then we have not been able to record the amount because there were no intelligent human life, no recorded written language, and there were tornadoes in areas with no inhabitants. We do not have the exact number of tornadoes that have occurred on this planet. Yet we do have the number of tornadoes average per year in different countries.
Since official record keeping began in 1950 through 2012 there have been 971 tornadoes recorded in Ohio.
There were 463 tornadoes recorded in 1963
As of April 30 there have been no recorded tornadoes in Kansas in 2013, which is unusual.
There were 208 tornadoes recorded on April 27, 2011, the most ever in a single day.
Since recorded began in 1950 there have been 535 tornadoes recorded in New Mexico. Te actual number is probably higher, as prior to the 1990s many of the weaker tornadoes were missed.
There have been 13 recorded tornadoes in Milwaukee since official records began in 1950.
So far there have been no tornadoes recorded in Alaska in 2011. In the past 60 years the state has only has 3 recorded tornadoes. All rated F0.
There were 1075 recorded tornadoes in the U.S. in 2000.
There were 1132 recorded tornadoes in the U.S. in 1991.
There were 1297 recorded tornadoes in the U.S. in 1992.
There were 1082 recorded tornadoes in the U.S. in 1994.
There were 1235 tornadoes recorded in the U.S. in 1995