A warm front lifted northeast across NY/PA/VA just ahead of a line of convection. Dewpoints in the mid-60s  to near 70F spread eastward with time and increased in coverage. Strong heating and destabilization occurred in concert with strong deep layer west/southwestly flow. Low-level lapse rates steepened, and southwest wind of 30 to 40 knots was present at the top of the mixed boundary layer, suggested strong damaging winds. Vertical shear supported rotating updrafts for a few supercell structures.

Tornado in INDIANA, PENNSYLVANIA
From 25-MAY-19 19:27:00 to 25-MAY-19 19:29:00 (EST-5)
Location: STRANGFORD
Tornado F-scale: EF1
Reported by: NWS Storm Survey

The NWS confirmed an EF1 tornado with winds around 90mph north of Blairsville.
A EF1 tornado started in a open field east of State Route 217
before tearing less than 20% of a roof off a house at the
intersection of State Route 217 and High Rise Road. Several bricks
from a single family home were lodged loose and scattered about
the property. As the tornado tracked east along High Rise road at
least 20 hardwood trees were either snapped, uprooted, or large
branches were taken down. Ontop of that, at least 10 softwood
trees had similar damage of being uprooted, snapped halfway up, or
missing large branches. At the time of the survey, it did not
appear any of the trees landed along nearby homes that flank both
sides of High Point Road. The storm lifted just as it crossed
Lear Road, but not before more tree damage was observed.

Tornado in INDIANA, PENNSYLVANIA
From 25-MAY-19 19:32:00 to 25-MAY-19 19:33:00 (EST-5)
Location: PENN RUN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The NWS confirmed an EF0 tornado with winds around 70mph. The tornado touched down near the intersection of Goral Road and Coal Road where three softwood trees were uprooted. The storm continued east and either knocked down large branches off
hardwood trees or uproot dead softwood trees. At least ten trees sustained damage.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 25-MAY-19 13:15:00 to 25-MAY-19 13:15:00 (EST-5)
Location: LOWBER
Magnitude: 55.00 EG
Reported by: 911 Call Center

A 911 Call Center reported a telephone pole and power lines had been knocked down.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 25-MAY-19 13:20:00 to 25-MAY-19 13:20:00 (EST-5)
Location: HEISTERSBURG
Magnitude: 50.00 EG
Reported by: 911 Call Center

A 911 Call Center reported trees and power lines down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 25-MAY-19 14:01:00 to 25-MAY-19 14:01:00 (EST-5)
Location: STAHLSTOWN
Magnitude: 50.00 EG
Reported by: 911 Call Center

A 911 Call Center reported wires down, with sparks from the lines igniting a brush fire.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 25-MAY-19 18:00:00 to 25-MAY-19 18:00:00 (EST-5)
Location: OIL CITY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The local fire department reported trees uprooted, and one of the trees fell on a vehicle.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 25-MAY-19 18:20:00 to 25-MAY-19 18:20:00 (EST-5)
Location: HOLT
Magnitude: 50.00 EG
Reported by: 911 Call Center

A 911 Call Center reported multiple trees down throughout Beaver County.

Hail in ALLEGHENY, PENNSYLVANIA
From 25-MAY-19 18:34:00 to 25-MAY-19 18:34:00 (EST-5)
Location: HARDY
Magnitude: 1.00 
Reported by: Public

The public reported 1 inch hail in this vicinity.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 25-MAY-19 18:55:00 to 25-MAY-19 18:55:00 (EST-5)
Location: MILLIGANTOWN
Magnitude: 50.00 EG
Reported by: 911 Call Center

A 911 Call Center reported that trees had been blown down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 25-MAY-19 18:57:00 to 25-MAY-19 18:57:00 (EST-5)
Location: MILLIGANTOWN
Magnitude: 50.00 EG
Reported by: Trained Spotter

A trained spotter reported that trees had been blown down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 25-MAY-19 19:08:00 to 25-MAY-19 19:08:00 (EST-5)
Location: NEWTONSBURG
Magnitude: 50.00 EG
Reported by: 911 Call Center

A 911 Call Center reported that trees were down in Townsend Park.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 25-MAY-19 19:14:00 to 25-MAY-19 19:14:00 (EST-5)
Location: DELMONT
Magnitude: 50.00 EG
Reported by: 911 Call Center

A 911 Call Center reported that trees were blown down.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 25-MAY-19 19:28:00 to 25-MAY-19 19:28:00 (EST-5)
Location: BLACK LICK
Magnitude: 50.00 EG
Reported by: Emergency Manager

An emergency manager reported multiple trees down on roadways and homes.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 25-MAY-19 19:30:00 to 25-MAY-19 19:30:00 (EST-5)
Location: CARMICHAELS
Magnitude: 50.00 EG
Reported by: Fire Department/Rescue

The Carmichaels Fire Department reported several trees down, which were blocking the roads around the area.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 25-MAY-19 19:37:00 to 25-MAY-19 19:37:00 (EST-5)
Location: HOMER CITY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A local citizen reported that trees had been blown down.