Jul 24, 2018
A moist environment was over the area with a deep and slow-moving closed low to the west. A cluster of thunderstorms developed over PA and tracked northeastward and over Allegany County. This resulted in 1 to 1.5 inches of rainfall and isolated flooding. The pattern failed to evolved through the following day, resulting in a similar setup causing flooding over Chautauqua County.
Source: NOAA National Weather Service Storm Events Database (event 776524). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Chautauqua County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.