Aug 7, 2020
An impulse riding along a west to east boundary stalled near the Mason-Dixon line produced severe thunderstorms and heavy rain across sections of extreme southeast Pennsylvania from late afternoon through the evening hours on August 7th. Strong winds knocked down trees, and torrential downpours on ground already saturated from the remnants of Hurricane Isaias produced flash flooding on many roadways and small streams in the area.
Source: NOAA National Weather Service Storm Events Database (event 901872). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Chester County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.