Niles, OH to Wheatland, PA F5 Tornado May 31, 1985

This extremely violent tornado began in eastern Ohio, and tore directly through the towns of Niles, Ohio and Wheatland, Pennsylvania, producing F5 damage at both locations. The tornado killed 18 people and injured 310, and was the most violent and deadly of the 44 recorded that day. Registering F5 on the Fujita scale, it remains the only F5 in Pennsylvania history, and was also the most violent tornado reported in the United States in 1985.
Max. rating F5 tornado
Fatalities 18 fatalities, 310 injuries