Aug 13, 2011
A series of thunderstorms preceding a cold front dropped three to six inches of rain across sections of Berks County, the Lehigh Valley, Philadelphia and its nearby suburbs. This caused flash flooding and flooding of streams and creeks that started in Berks County and the Lehigh valley during the evening of the 13th and spread to the local Philadelphia area during the morning of the 14th.
Source: NOAA National Weather Service Storm Events Database (event 345411). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Lehigh County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.