The central Appalachian region has experienced some of the largest rainfall accumulations in the world at time intervals less than 6 hours, including the July 18, 1942, Smethport, Pennsylvania, storm that produced 780 mm (30.7 inches) in less than 5 hours.
The central Appalachian region has experienced some of the largest rainfall accumulations in the world at time intervals less than 6 hours, including the July 18, 1942, Smethport, Pennsylvania, storm that produced 780 mm (30.7 inches) in less than 5 hours