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EF0 tornado in Butler County, Pennsylvania

Tornado May 21, 2025 · Butler County, Pennsylvania

EF0

Rating

0.6 mi

Whole path

210 yd

Path width

$55K

Damage as recorded

NOAA records this tornado county by county. Its path ran through Butler County → Butler County; the totals above are for the whole tornado.

EF0EF1EF2EF3EF4EF5Unrated

The path drawn at its surveyed width of 210 yards (0.12 mi) — zoom in and the swath grows to true scale. Other tornadoes recorded nearby that day are shown faint.

What EF0 means. On the Enhanced Fujita scale, EF0 is light damage: shingles and siding peeled, gutters torn, branches broken, consistent with estimated gusts of 65–85 mph. The rating comes from a survey of the worst damage after the storm, not from a wind measurement, so it says as much about what the tornado hit as about how strong it was.

What the National Weather Service wrote

Several hardwood trees had large limbs broken off in a path in the 250-280 section of Mack Road in West Sunbury, PA. This was caused by a different circulation than the earlier tornado in Butler County. The damage was off of Mack Road and was provided by drone video to the National Weather Service since the area is not accessible by vehicle.

The wider storm

An occluding surface low slowly drifted across Ohio on May 21st. Bands of showers with embedded thunderstorms moved across southwest Pennsylvania. During the mid to late afternoon, one convective band, associated with ample 0-3km CAPE and surface vorticity, was able to generate four tornadoes across southwest PA. Three were relatively brief and weak, but one longer-track EF1 was noted in Washington County. Multiple rounds of slow-moving heavier rain also produced a number of flash flooding incidents.

Began near Jamisonville (40.9639, -79.8913).

Other tornadoes from the same storm system

2 more tornadoes the National Weather Service filed under this storm episode.

EF1 Washington County EF0 Washington County

Source: NOAA Storm Events Database, event 1266149. Narratives are written by the National Weather Service forecast office that issued the report.

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