A trough was in place across the eastern part of the country on August 2nd.  A weak shortwave moving through that upper system induced an inverted surface trough that slid slowly westward across southwest Pennsylvania through the day.  Storms initially formed to the northeast of Pittsburgh, with one storm causing wind damage in Jefferson County.
Thunderstorms then developed westward during the afternoon, following the surface trough.  Instability was sufficient for strong updrafts which produced a few more hail and wind damage reports.  A weak wind field prevented storms from becoming more organized, but that wind field also promoted slow storm motion, leading to a few roadway flash flooding reports.

Flash Flood in WESTMORELAND, PENNSYLVANIA
From 02-AUG-19 14:48:00 to 02-AUG-19 16:48:00 (EST-5)
Location: DONEGAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The county emergency manager reported that Route 31 was flooded in Donegal.

Flash Flood in WESTMORELAND, PENNSYLVANIA
From 02-AUG-19 15:10:00 to 02-AUG-19 16:48:00 (EST-5)
Location: JONES MILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that Sarah Lane near Donegal was closed due to flash flooding.

Flash Flood in WESTMORELAND, PENNSYLVANIA
From 02-AUG-19 15:10:00 to 02-AUG-19 16:48:00 (EST-5)
Location: JONES MILLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Mountain View Road near Donegal was closed due to flooding, according to a trained spotter.

Flash Flood in ALLEGHENY, PENNSYLVANIA
From 02-AUG-19 15:45:00 to 02-AUG-19 17:20:00 (EST-5)
Location: MUNHALL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A member of the public stated that flooding was occurring on Route 885 near Glass Run.

Flash Flood in FAYETTE, PENNSYLVANIA
From 02-AUG-19 18:15:00 to 02-AUG-19 18:54:00 (EST-5)
Location: MASONTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A county 911 official reported that roadways were flooded in Masontown.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 02-AUG-19 09:37:00 to 02-AUG-19 09:37:00 (EST-5)
Location: CLOE
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

A county 911 official reported that single trees were blown down at both 511 Pine Tree Road and the intersection of Route 36 and Cloe Rossiter Road.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 02-AUG-19 12:59:00 to 02-AUG-19 12:59:00 (EST-5)
Location: RECTOR
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Department of Highways

The county Department of Highways reported that State Route 381 was closed due to a downed power line.

Hail in WESTMORELAND, PENNSYLVANIA
From 02-AUG-19 14:10:00 to 02-AUG-19 14:10:00 (EST-5)
Location: JONES MILLS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 02-AUG-19 14:28:00 to 02-AUG-19 14:28:00 (EST-5)
Location: DONEGAL
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

County 911 officials reported that trees were blown down near the intersection of Nedrow Road and Route 711.

Flood in WESTMORELAND, PENNSYLVANIA
From 02-AUG-19 16:00:00 to 02-AUG-19 16:48:00 (EST-5)
Location: DONEGAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

County 911 officials reported that two residences experienced flooding on Evans Lane and on Route 31.

Hail in ALLEGHENY, PENNSYLVANIA
From 02-AUG-19 16:25:00 to 02-AUG-19 16:25:00 (EST-5)
Location: MONTROSE HILL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHINGTON, PENNSYLVANIA
From 02-AUG-19 16:35:00 to 02-AUG-19 16:35:00 (EST-5)
Location: SOUTH STRABANE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 02-AUG-19 17:10:00 to 02-AUG-19 17:10:00 (EST-5)
Location: TAYLORSTOWN STATION
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Multiple trees were reported to be blown down in Buffalo Township, according to county 911 officials.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 02-AUG-19 09:37:00 to 02-AUG-19 09:37:00 (EST-5)
Location: CLOE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A 911 dispatcher reported that a tree was blown down near the railroad tracks at the intersection of Route 36 and Cloe Rossiter Road.