Oct 1, 2010
A series of low pressure systems that moved north along a slowly moving cold front brought heavy rain into Eastern Pennsylvania on September 30th and October 1st. Event precipitation totals average 5 to 10 inches with the highest amounts in the Philadelphia western suburbs. Many streams and rivers flooded, but the worst flooding occurred in Delaware, Chester, Montgomery and Philadelphia Counties where waterways crested at moderate to major levels. For many gaged waterways, it was the worst flood
Source: NOAA National Weather Service Storm Events Database (event 265686). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Philadelphia County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.