Jun 28, 2025
A warm front moving across central Pennsylvania during the morning hours of June 28, 2025 with a surface cold front stationed in the Great Lake region allowed for much of central Pennsylvania to reside in the warm sector during the early afternoon and evening hours. Increasing instability, shear, and moisture due to this residence time primed the atmosphere ahead of a prefrontal trough allowing for ample lift to produce showers and thunderstorms. Thunderstorms in western Pennsylvania during the
Source: NOAA National Weather Service Storm Events Database (event 1266689). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Lancaster County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.