Have you seen the NWS new Severe Weather Dashboard at https://experience.arcgis.com/experience/ac8e52b8ddd94ddfa7ace14808b34a20 This is a screencap of Pennsylvania Tornadoes! Of interest... Biggest year was 1998 (my first Spring in the state LOL) July is most likely month to see a tornado here May is most likely month to see a MAJOR (EF3-5) tornado