Jul 1, 2025
A slow-moving warm front in an extremely moist (PWAT values exceeding 2.00, values closer to 2.25 across the Lower Susquehanna Valley) and unstable environment allowed for multiple clusters of thunderstorms to begin to form during the late morning hours and continue through the late evening hours of June 30, 2025. A shortwave stationed across the region allowed for enhanced lift, with relatively weak shear in place across the region, bringing a flash flood threat given training thunderstorms wit
Source: NOAA National Weather Service Storm Events Database (event 1278545). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Lebanon County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.