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Flash Flood — Lycoming, PA

Jun 26, 2025

Hot and humid conditions under the influence of a lee-side trough allowed for scattered thunderstorm development during the afternoon and evening hours of June 26, 2025. Ample moisture in place across the region (PWATs in 1.75 to 2.00 range), coupled with overly favorable instability (CAPE in the 2000-3000 J/kg range) allowed for pulse thunderstorms to push up towards severe limits and trend downward without sufficient shear in place across central Pennsylvania. Severe thunderstorms across south

Source: NOAA National Weather Service Storm Events Database (event 1266686). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Lycoming, PA

This event is one of many recorded floods in Lycoming County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

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