How many counties in Pennsylvania get tornadoes each year?

Answer 1

Since record keeping began in 1950 there have been 717 tornadoes recorded in Pennsylvania, However, the actual number of tornadoes is likely higher than this as prior to the 1990s a significant number of the weaker tornadoes (which account for 89% of tornadoes as a whole) were missed.

Answer 2

On average Pennsylvania gets about 12 tornadoes per year, so the number of counties that get tornadoes is probably close to that, when you take into account tornadoes crossing county lines and a single county getting multiple tornadoes.

Answer 3

Since official records began in 1950 up through 2014 there have been 747 tornadoes recorded in Pennsylvania. Note that the actual number of tornadoes is likely significantly higher, as many of the weaker tornadoes were missed in the early part of this period.

Answer 4

Tornadoes are most frequent in Pennsylvania in late spring and early summer, with June and July as the peak months.