FloodZoneMap.org

A wavy and nearly stationary frontal boundary was in place near the Mason-Dixon Line. Morning clouds hindered destabilization somewhat, but afternoon clearing and the arrival of a mesoscale low allowed storms to blossom during the afternoon and evening. Although a few wind damage reports were received, flash flooding was the main focus of this event. Hardest hit were Allegheny, Washington, and Westmoreland Counties in Pennsylvania. Here, numerous reports of roadway flooding were received, al