A strong, occluding surface low crossed the Great Lakes on November 27th. After morning rain, instability in the form of around 500 J/kg of mean-layer CAPE was able to develop in the Middle Ohio Valley and advect northeast into northern West Virginia and southwest Pennsylvania.  A strongly sheared environment was also present. Strong low-level flow helped to support a damaging-wind threat, while cold temperatures aloft and favorable deep-layer shear also supported large hail, which is unusual for late November.  In fact, severe conditions were locally quite signficant, with one report of an 87 MPH gust in a mesovortex, as well as hail reaching two inches in diameter.  Many reports of downed trees and power lines were received, with some generally minor structural damage as well.  In Perry Township, estimates were that up to 400 vehicles were damaged by hail, with an estimated 1.2 million dollars worth of damage. A similar amount of car damage also likely occurred in Westmoreland County.

Hail in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:44:00 to 27-NOV-22 14:44:00 (EST-5)
Location: LOWBER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:44:00 to 27-NOV-22 14:44:00 (EST-5)
Location: WHITSETT
Magnitude: 2.00 
Property damage: 1.20M
Crop damage: 0.00K
Reported by: Social Media

Reported by the public, with a photo of the 2 inch hail measurement.  Also, the Perry Township Supervisor reported that 175 vehicles were damaged at an auto auction in the township, with around 400 vehicles damaged in the township overall.

Hail in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:47:00 to 27-NOV-22 14:47:00 (EST-5)
Location: WHITSETT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:47:00 to 27-NOV-22 14:47:00 (EST-5)
Location: JEWELL
Magnitude: 1.75 
Reported by: Public

Public call reporting ping pong to golf ball-sized hail, with damage to screens, car roofs, and houses.

Hail in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:48:00 to 27-NOV-22 14:48:00 (EST-5)
Location: WICK HAVEN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:50:00 to 27-NOV-22 14:50:00 (EST-5)
Location: FARMINGTON ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:50:00 to 27-NOV-22 14:50:00 (EST-5)
Location: BANNING
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 14:57:00 to 27-NOV-22 14:57:00 (EST-5)
Location: GREENSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 14:58:00 to 27-NOV-22 14:58:00 (EST-5)
Location: GREENSBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel-sized hail was reported to be covering the ground.

Hail in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 15:02:00 to 27-NOV-22 15:02:00 (EST-5)
Location: YOUNDWOOD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 27-NOV-22 14:07:00 to 27-NOV-22 14:07:00 (EST-5)
Location: CRABAPPLE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: State Official

A tree was reported to be downed across Crabapple Road.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:28:00 to 27-NOV-22 14:28:00 (EST-5)
Location: NILAN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Multiple trees were reported to be down in the area.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:37:00 to 27-NOV-22 14:37:00 (EST-5)
Location: JEWELL
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees and wires were reported to be down in the eastern portion of Washington County.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:39:00 to 27-NOV-22 14:39:00 (EST-5)
Location: ALLENPORT
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

A roof was partially blown off of a house.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:40:00 to 27-NOV-22 14:40:00 (EST-5)
Location: GILLESPIE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees and utility poles were blown down in the area.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:40:00 to 27-NOV-22 14:40:00 (EST-5)
Location: DONORA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Donora fire chief reported that several utility poles were sheared off.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 14:52:00 to 27-NOV-22 14:52:00 (EST-5)
Location: NEWTONSBURG
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Multiple trees were reported down in the area.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 15:16:00 to 27-NOV-22 15:16:00 (EST-5)
Location: LIGONIER
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Multiple trees and wires were reported to be down in the area.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 15:19:00 to 27-NOV-22 15:19:00 (EST-5)
Location: WEST FAIRFIELD
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Multiple trees were reported to be down in Fairfield Township, with a few trees downed on houses.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 15:20:00 to 27-NOV-22 15:20:00 (EST-5)
Location: LIGONIER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Trees were reported to be blown down along Route 30.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 15:21:00 to 27-NOV-22 15:21:00 (EST-5)
Location: WEST FAIRFIELD
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple trees were uprooted in the area.

Hail in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:37:00 to 27-NOV-22 14:37:00 (EST-5)
Location: JEWELL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Golf ball-sized hail reported at California University.

Hail in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 14:37:00 to 27-NOV-22 14:37:00 (EST-5)
Location: MONESSEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Reported in the town of Monessen.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:47:00 to 27-NOV-22 14:47:00 (EST-5)
Location: WHITSETT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The wind gust was measured with an anemometer.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 15:15:00 to 27-NOV-22 15:15:00 (EST-5)
Location: WILPEN
Magnitude: 76.00 MG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Social Media

This peak wind gust was measured with an anemometer, and was coincident with the passage of a mesovortex. The wind carried shelters tens of feet, created minor structural damage, and uprooted some softwood trees.

Hail in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:38:00 to 27-NOV-22 14:38:00 (EST-5)
Location: CALIFORNIA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:38:00 to 27-NOV-22 14:38:00 (EST-5)
Location: JEWELL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:39:00 to 27-NOV-22 14:39:00 (EST-5)
Location: BELLE VERNON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 27-NOV-22 14:47:00 to 27-NOV-22 14:47:00 (EST-5)
Location: MACBETH
Magnitude: 1.00 
Property damage: 1.20M
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail caused holes in siding along west side of a house, with dented cars also reported. Similar car damage to that seen in Fayette County was also likely, with possibly up to 400 cars damaged.

Hail in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:39:00 to 27-NOV-22 14:39:00 (EST-5)
Location: LONG BRANCH
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in FAYETTE, PENNSYLVANIA
From 27-NOV-22 14:40:00 to 27-NOV-22 14:40:00 (EST-5)
Location: GILLESPIE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHINGTON, PENNSYLVANIA
From 27-NOV-22 14:40:00 to 27-NOV-22 14:40:00 (EST-5)
Location: JEWELL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media