Storm Events Database
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Storm Events Database
Event Details:
| Event | Tornado |
| -- Scale | EF0 |
| -- Length | 0.24 Miles |
| -- Width | 210 Yards |
| State | PENNSYLVANIA |
| County/Area | BUTLER |
| WFO | PBZ |
| Report Source | NWS Storm Survey |
| NCEI Data Source | CSV |
| Begin Date | 2025-05-21 15:40 EST-5 |
| Begin Location | 1NNE JAMISONVILLE |
| Begin Lat/Lon | 40.9639/-79.8913 |
| End Date | 2025-05-21 15:41 EST-5 |
| End Location | 1NNE JAMISONVILLE |
| End Lat/Lon | 40.9651/-79.8869 |
| Deaths Direct/Indirect | 0/0 (fatality details below, when available...) |
| Injuries Direct/Indirect | 0/0 |
| Property Damage | 5.00K |
| 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 | 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. |
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 |
