Storm Events Database

Storm Events Database

Event Details:

Event Tornado
-- Scale EF0
-- Length 0.36 Miles
-- Width 160 Yards
State PENNSYLVANIA
County/Area BUTLER
WFO PBZ
Report Source NWS Storm Survey
NCEI Data Source CSV
Begin Date 2025-05-21 15:37 EST-5
Begin Location 1NW FISHER HGTS
Begin Lat/Lon 40.9381/-79.9633
End Date 2025-05-21 15:39 EST-5
End Location 1NNW FISHER HGTS
End Lat/Lon 40.9384/-79.9565
Deaths Direct/Indirect 0/0 (fatality details below, when available...)
Injuries Direct/Indirect 0/0
Property Damage 50.00K
Crop Damage 0.00K
Episode Narrative 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.
Event Narrative A closed caption security video captured a tornado touching down northwest of Northvue, causing the roof to lift off of the Center Township salt dome and depositing it in the parking lot behind the facility. The first sign of damage was north of Unionville Road, where less than five trees had large branches down and one was uprooted. The worst damage happened to the salt dome as described above, where the maximum wind of 85 MPH was estimated. The only other damage nearby to the salt dome was a few hardwood trees that had large limbs broken off. The twister lifted in an open field just northeast of the salt dome facility.


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Event Map:

Note: The tornado track is approximate based on the beginning (B) and ending (E) locations. The actual tornado path may differ from a straight line.


All events for this episode:

Location County/Zone St. Date Time T.Z. Type Mag Dth Inj PrD CrD
Totals: 0 0 171.00K 0.00K
UNION VLY LAWRENCE CO. PA 05/21/2025 15:09 EST-5 Flash Flood 0 0 0.00K 0.00K
WALMO LAWRENCE CO. PA 05/21/2025 15:33 EST-5 Flash Flood 0 0 0.00K 0.00K
FISHER HGTS BUTLER CO. PA 05/21/2025 15:37 EST-5 Tornado EF0 0 0 50.00K 0.00K
JAMISONVILLE BUTLER CO. PA 05/21/2025 15:40 EST-5 Tornado EF0 0 0 5.00K 0.00K
BUFFALO WASHINGTON CO. PA 05/21/2025 15:47 EST-5 Tornado EF0 0 0 10.00K 0.00K
MC CONNELLS MILL WASHINGTON CO. PA 05/21/2025 15:57 EST-5 Tornado EF1 0 0 100.00K 0.00K
PORTERSVILLE BUTLER CO. PA 05/21/2025 16:02 EST-5 Thunderstorm Wind 50 kts. EG 0 0 1.00K 0.00K
WEST PITTSBURG LAWRENCE CO. PA 05/21/2025 16:05 EST-5 Flash Flood 0 0 0.00K 0.00K
ROSE PT LAWRENCE CO. PA 05/21/2025 16:18 EST-5 Flash Flood 0 0 0.00K 0.00K
FINLEYVILLE WASHINGTON CO. PA 05/21/2025 16:19 EST-5 Thunderstorm Wind 50 kts. EG 0 0 3.00K 0.00K
GASTONVILLE WASHINGTON CO. PA 05/21/2025 16:19 EST-5 Thunderstorm Wind 60 kts. EG 0 0 2.00K 0.00K
MUDDY CREEK BUTLER CO. PA 05/21/2025 16:30 EST-5 Flash Flood 0 0 0.00K 0.00K
CRAFTON ALLEGHENY CO. PA 05/21/2025 16:46 EST-5 Flash Flood 0 0 0.00K 0.00K
HIGHFIELD BUTLER CO. PA 05/21/2025 19:59 EST-5 Flash Flood 0 0 0.00K 0.00K
CHEWTON LAWRENCE CO. PA 05/21/2025 20:00 EST-5 Flash Flood 0 0 0.00K 0.00K
WALFORD LAWRENCE CO. PA 05/21/2025 20:03 EST-5 Flash Flood 0 0 0.00K 0.00K
Totals: 0 0 171.00K 0.00K