Thunderstorm Wind in Franklin County, Pennsylvania

Thunderstorm Wind May 20, 2026 · Franklin County, Pennsylvania

60 mph

Estimated gust (52 kt)

$5K

Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

A severe thunderstorm producing wind gusts estimated at 60 mph knocked down multiple trees and wires along Welsh Run Road and Mercersburg Road approximately 3 miles east-southeast of Claylick.

The wider storm

A surface cold front draped across the southern tier of Pennsylvania began to shift further south and east during the afternoon and evening hours of May 20, 2026. This served as a lifting mechanism in an unstable airmass with 1500 to 2000 J/kg of CAPE across the Lower Susquehanna Valley and favorable bulk shear. Showers and storms began to form and upscale growth allowed for strong-to-severe storms to continue into south-central and southeastern Pennsylvania with tree damage being the main hazard observed within these storms.

Began near Welsh Run (39.7664, -77.8529).

Source: NOAA Storm Events Database, event 1333018. Narratives are written by the National Weather Service forecast office that issued the report.

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