Thunderstorm Wind — Lycoming, Pennsylvania

2025-07-25 · near Waterville, Lycoming, Pennsylvania

Event narrative

A severe thunderstorm, producing wind gusts estimated near 60 mph, knocked down multiple trees blocking the roadway west of Waterville.

Wider weather episode

Residence time in the warm sector across central Pennsylvania led to increasingly unstable conditions in a relatively moist environment during the afternoon and evening hours of July 25, 2025. A pre-frontal trough began moving into this environment with ample shear in place to support continued updraft formation. Thunderstorms began to form during the afternoon hours, continuing to gain strength as they moved into an increasingly unstable and sheared environment across the eastern half of Pennsylvania. Severe thunderstorms continued moving southeastward across the Commonwealth, producing scattered instances of thunderstorm wind damage, including multiple trees on residences, across the south-central mountains. Wind damage become more widespread as thunderstorms began moving into the Susquehanna Valley, with the most concentrated swath of damage observed in Lebanon County.

View location on OpenStreetMap → (41.3120, -77.3804)

Source: NOAA Storm Events Database, event_id 1276577. Narrative written by the NWS forecast office that issued the report.