A shortwave trough axis lifted quickly across the Great Lakes and the Upper Ohio Valley on November 15th, taking on a negative tilt as it did so. Deepening surface low pressure tracked across Michigan and into Ontario during the day, whipping a cold front across the region during the late morning and early afternoon. Some of the classic ingredients for a widespread wind event were present, including a negatively- tilted trough, jet positioning over the region, and a favorable Great Lakes surface low track. Strong post-frontal 3 hour pressure rises of 5-7 mb were observed, and a low-topped mostly lightning-free convective line accompanied the boundary. Widespread wind gusts of at least 45-55 MPH were observed, with several higher measured gusts seen. Along the convective line, gusts of 55-65 MPH likely occurred. This resulted in widespread reports of wind damage to trees and power lines, with a few instances of mostly minor structural damage.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 15-NOV-20 14:29:00 to 15-NOV-20 14:29:00 (EST-5)
Location: NEW CASTLE
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: State Official

Widespread tree and power line damage was reported across the county.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 15-NOV-20 14:30:00 to 15-NOV-20 14:30:00 (EST-5)
Location: NEW CASTLE JCT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that tree and limb damage occurred on their property, causing some damage.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 15-NOV-20 14:34:00 to 15-NOV-20 14:34:00 (EST-5)
Location: ELLWOOD CITY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Trees and wires were blown down in Ellwood City.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 15-NOV-20 14:34:00 to 15-NOV-20 14:34:00 (EST-5)
Location: MERCER
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous trees were reported to be down in Mercer.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 15-NOV-20 14:34:00 to 15-NOV-20 14:34:00 (EST-5)
Location: TRANSFER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

A building was damaged at the Reynolds Drive-In.  A picture was provided.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 15-NOV-20 14:35:00 to 15-NOV-20 14:35:00 (EST-5)
Location: MERCER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree limb was reported to have damaged a car, and a tree fell on a house, both in the Mercer area.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 15-NOV-20 14:36:00 to 15-NOV-20 14:36:00 (EST-5)
Location: JOSEPHTOWN
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

High winds caused a crane to snap and collapse at the Shell cracker plant in Beaver County.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 15-NOV-20 14:39:00 to 15-NOV-20 14:39:00 (EST-5)
Location: MERCER
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Numerous reports of wind damage were received from across the county.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 15-NOV-20 14:42:00 to 15-NOV-20 14:42:00 (EST-5)
Location: SANDY LAKE
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Falling trees caused damage to headstones at Oak Hill Cemetery.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 15-NOV-20 14:43:00 to 15-NOV-20 14:43:00 (EST-5)
Location: SOUTH HGTS
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

A metal roof was blown off of a building on Duss Avenue in Ambridge.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 15-NOV-20 14:43:00 to 15-NOV-20 14:43:00 (EST-5)
Location: WIND RIDGE
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees and power lines were downed in the western part of the county.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 15-NOV-20 14:45:00 to 15-NOV-20 14:45:00 (EST-5)
Location: BOWER HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Power lines were blown down on Washington Pike.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 15-NOV-20 14:52:00 to 15-NOV-20 14:52:00 (EST-5)
Location: MT LEBANON
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: 911 Call Center

In Mount Lebanon and South Park, trees and wires were blown down.  A tree hit a fire hydrant on Beadling Road and caused damage to it.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 15-NOV-20 14:52:00 to 15-NOV-20 14:52:00 (EST-5)
Location: HOMEACRE
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: State Official

Trees and wires were downed across the county.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 15-NOV-20 14:52:00 to 15-NOV-20 14:52:00 (EST-5)
Location: KENNERDELL
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: State Official

A tree fell on a house at an unknown address, with moderate damage seen.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 15-NOV-20 14:57:00 to 15-NOV-20 14:57:00 (EST-5)
Location: FRANKLIN
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A total of 83 trees were blown down across the county.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 15-NOV-20 15:00:00 to 15-NOV-20 15:00:00 (EST-5)
Location: PARKWOOD
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Two trees were uprooted.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 15-NOV-20 15:03:00 to 15-NOV-20 15:03:00 (EST-5)
Location: HARWICK
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were reported to be uprooted.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 15-NOV-20 15:16:00 to 15-NOV-20 15:16:00 (EST-5)
Location: LINCOLN HGTS
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Damage to a building created debris that blew on to Route 30.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 15-NOV-20 15:16:00 to 15-NOV-20 15:16:00 (EST-5)
Location: PENN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree fell on to a home in Penn Heights Mobile Park.

Thunderstorm Wind in FOREST, PENNSYLVANIA
From 15-NOV-20 15:17:00 to 15-NOV-20 15:17:00 (EST-5)
Location: TIONESTA
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Trees were blown down between Tionesta and Fryburg, with some power outages reported.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 15-NOV-20 15:22:00 to 15-NOV-20 15:22:00 (EST-5)
Location: WEST KITTANNING
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Widespread tree and power line damage was reported across Armstrong County.

Thunderstorm Wind in FOREST, PENNSYLVANIA
From 15-NOV-20 15:22:00 to 15-NOV-20 15:22:00 (EST-5)
Location: KIZER CORNERS
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple trees were reported to be blown down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 15-NOV-20 15:34:00 to 15-NOV-20 15:34:00 (EST-5)
Location: GREENSBURG
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Widespread wind damage, along with trees and wires down, was reported across Westmoreland County.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 15-NOV-20 15:38:00 to 15-NOV-20 15:38:00 (EST-5)
Location: WEST OVERTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Minor structural damage occurred to barn doors and fencing.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 15-NOV-20 15:38:00 to 15-NOV-20 15:38:00 (EST-5)
Location: CHEVY CHASE HGTS
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Widespread tree and power line damage occurred in Indiana County.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 15-NOV-20 15:41:00 to 15-NOV-20 15:41:00 (EST-5)
Location: BROOKVILLE
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Widespread wind damage was reported across Jefferson County.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 15-NOV-20 15:42:00 to 15-NOV-20 15:42:00 (EST-5)
Location: CONNELLSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree was reported to be blown down on to a home.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 15-NOV-20 15:45:00 to 15-NOV-20 15:45:00 (EST-5)
Location: WHITNEY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree was blown on to a home on Quarry Road.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 15-NOV-20 15:48:00 to 15-NOV-20 15:48:00 (EST-5)
Location: FARMINGTON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree was blown on to a home.