Since official record began in 1950 through 2013, there have been a total of 738 tornadoes recorded in Pennsylvania. Final data for 2014 has not yet been published. The actual number of tornadoes is probably significantly higher than this, as we missed many of the weaker tornadoes in the early part of this period.
If you are referring to a specific event in which tornadoes struck Pennsylvania, please specify in a separate question.
About 30 tornadoes per year.
about 80 tornadoes each year
well they have about 3 tornadoes each year
On average there are about 57 tornadoes a year
Texas had 147 recorded tornadoes in the year 2000.
over a 1000 and a 1000 tornadoes are on average per year
The U.S. averages about 1200 tornadoes per year.
Georgia averages about 29 tornadoes per year.
Texas averages 135 tornadoes per year.
It varies from year to year, but on average California gets 11 tornadoes annually.
On average, Wyoming has about 12 tornadoes each year. However, the number of tornadoes can vary significantly from year to year.
It varies widely, from year to year, but on average Mississippi gets about 45 tornadoes per year.