Oct 31, 2019
A strong mid-level trough swung across the Plains and the Great Lakes on the 31st. The trough took on a negative tilt as it crossed the middle and upper Ohio Valley during the evening. Deepening surface low pressure rode northward into the eastern Great Lakes as well, which pushed a cold front across the region during the evening. An unseasonably strong feed of moisture developed ahead of this system, triggering heavy rainfall. 1 to 2 inches of rain fell across southwest Pennsylvania, with i
Source: NOAA National Weather Service Storm Events Database (event 861749). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Washington County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.