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Displaying AFOS PIL: PNSPBZ Received: 2018-06-04 19:18 UTC
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196 NOUS41 KPBZ 041918 PNSPBZ PAZ021-029-050500- PUBLIC INFORMATION STATEMENT National Weather Service PITTSBURGH PA 318 PM EDT Mon Jun 4 2018 ...NWS DAMAGE SURVEY FOR TORNADO NEAR FINLEYVILLE PA... .Finleyville Tornado... Start Location...1S Finleyville PA Date...June 3, 2018 Confirmed Time...811pm EDT - 813pm EDT Maximum EF-Scale Rating...EF0 ...Summary... A brief, weak tornado (rated EF0 on the Enhanced Fujita Scale) occurred Sunday evening along Airport Road in Finleyville, PA. Eye-witness accounts, coupled with strong photographic evidence, confirm that a high-end EF0 tornado, with winds estimated at 75 to 85 mph, touched down around 812 PM on June 3rd. The damage track began immediately adjacent (south) to a series of airplane hangars that reside along the southern flank of the Finleyville Airport runway. The airport sits along a peak in elevation just south of Finleyville. A narrow tornado, with a damage width of only 50 feet, descended southeast approximately 200 yards, across a residential property into a local valley before dissipating. Several large pine trees suffered scattered large limb damage with one mature pine snapped entirely at the base. An auxiliary two-story garage suffered damage to both entry doors on the north and south facing sides of the building, with substantial siding removed from the south facing side and lofted into downstream trees and a neighboring property. A wooden vehicle trailer was also lofted and displaced approximately 30 feet. Additionally, a large area of very tall grass along the southeast end of the property, was flattened with a very obvious convergent and rotational pattern. No damage was noted to the adjacent residences, confirming the damage width. From a meteorological perspective, this tornado formed at the tail- end of a long frontally-forced line of thunderstorms, coincident with a newly developing thunderstorm at the southwest end of the line. A cluster of showers and thunderstorms had preceded this frontal passage by only 15-20 minutes, likely leaving behind a localized outflow boundary that the advancing front interacted with. The strong updraft of the new tail-end cell coincided with the colliding boundaries, producing this short-lived but damaging non- supercell tornado. EF Scale: The Enhanced Fujita Scale classifies tornadoes into the following categories: EF0...Weak......65 to 85 mph EF1...Weak......86 to 110 mph EF2...Strong....111 to 135 mph EF3...Strong....136 to 165 mph EF4...Violent...166 to 200 mph EF5...Violent...>200 mph * The information in this statement is preliminary and subject to change pending final review of the event and publication in NWS Storm Data. $$ Bookbinder