Aug 21, 2021
A subtropical air mass with dewpoints near 70 degrees and precipitable water values of roughly 1.7 inches was in place across the region. Several storms pushed to the northwest out of Pennsylvania and blossomed into a cluster of slow-moving storms in southern Chautauqua county. The storms slowed as they moved north while back-building in an unusual direction...to the east. Warm rain processes were likely dominating as the storm centroid on radar was below the freezing level and very little light
Source: NOAA National Weather Service Storm Events Database (event 982925). 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.