Jul 12, 2021
Thunderstorms formed during the afternoon and evening of the 12th in an environment of moderate CAPE and moderate shear southeast of a stationary front. Thunderstorms initially formed as single cells, then formed into multicell clusters later in the event over the Lower Susquehanna Valley. Further north slower moving storms brought flooding around Mansfield in Tioga County.
Source: NOAA National Weather Service Storm Events Database (event 971585). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Tioga County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.