Jul 23, 2009
Slow moving thunderstorms along a nearly stationary cold front produced locally heavy rainfall in a short duration, resulting in flash flooding across portions of the Lower Susquehanna Valley. Rainfall amounts ranged from three to six inches in less than three hours with the highest amounts over eastern Cumberland, eastern Franklin and northern York Counties.
Source: NOAA National Weather Service Storm Events Database (event 177306). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in York County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.