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.
On average, Pennsylvania gets 17 tornadoes per year.
Pennsylvania averages 17 tornadoes per year.
About 30 tornadoes per year.
about 80 tornadoes each year
Australia has about 80 tornadoes every year.
well they have about 3 tornadoes each year
On average there are about 57 tornadoes a year
over a 1000 and a 1000 tornadoes are on average per year
Tennessee averages about 30 tornadoes per year.
Michigan averages 18 tornadoes per year.
Texas had 147 recorded tornadoes in the year 2000.
The U.S. averages about 1200 tornadoes per year.
Georgia averages about 29 tornadoes per year.
Texas averages 135 tornadoes per year.