FloodZoneMap.org

Torrential thunderstorm rains over a short duration produced flash flooding across the lower Susquehanna Valley during the mid to late afternoon. The very heavy rain caused significant flash flooding in downtown Harrisburg, northern York County and southern Adams County. Much of the area received locally heavy rains during the early morning hours which ultimately set the stage for the afternoon convective rainfall to quickly run off into low-lying and poor drainage areas and small creeks and str