A strong mid-level trough swung across the Plains and the Great Lakes on the 31st.  The trough took on a negative tilt as it crossed the middle and upper Ohio Valley during the evening.  Deepening surface low pressure rode northward into the eastern Great Lakes as well, which pushed a cold front across the region during the evening.  An unseasonably strong feed of moisture developed ahead of this system, triggering heavy rainfall.  1 to 2 inches of rain fell across southwest Pennsylvania, with isolated higher totals of up to 2.5 inches.  This led to several reports of road and small-stream flooding in the region.
In addition, the negatively tilted trough, strong pressure gradient, and mixing provided by the cold front led to a period of high winds across the region.   Many gusts of 45 to 50 MPH were observed, with a high gust of 64 MPH reported in eastern Tucker County, WV.  Many reports of tree and power line damage were received, and power outages numbered into the thousands of customers.  Wind impacts were likely more widespread than reported.

Heavy Rain in BUTLER, PENNSYLVANIA
From 31-OCT-19 06:00:00 to 31-OCT-19 16:37:00 (EST-5)
Location: EVANS CITY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A rainfall total of 2.00 inches was observed since 7 AM EDT on the 31st, with a storm total of 2.58 inches.

Strong Wind in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 14:26:00 to 31-OCT-19 14:26:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was reported down on wires blocking half of Knoxdale Road at the intersection of Witch Hollow Road near Pinecreek.

Heavy Rain in ALLEGHENY, PENNSYLVANIA
From 31-OCT-19 00:00:00 to 31-OCT-19 15:58:00 (EST-5)
Location: CARNOT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A rainfall total of 2.21 inches was observed since midnight.

Heavy Rain in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 07:00:00 to 31-OCT-19 16:12:00 (EST-5)
Location: PINE CREEK
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Rainfall of 2.18 inches was reported since 8 AM EDT on the 31st, with a storm total of 2.73 inches.

Flood in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 18:06:00 to 31-OCT-19 23:59:00 (EST-5)
Location: LINDSEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Flooding was reported on Diamond Lane.

Flood in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 21:50:00 to 31-OCT-19 23:59:00 (EST-5)
Location: SUMMERVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Road flooding was observed at the intersection of Water Street and Route 28.

Strong Wind in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 16:00:00 to 31-OCT-19 21:21:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Many reports of trees being blown down were reported from across the county.

Strong Wind in GREENE, PENNSYLVANIA
From 31-OCT-19 21:27:00 to 31-OCT-19 21:27:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree was reported to be blown down on Lippencott Road in Morgan Township.

Strong Wind in WASHINGTON, PENNSYLVANIA
From 31-OCT-19 18:39:00 to 31-OCT-19 18:39:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Several trees were reported to be blown down in Monessen.

Strong Wind in WESTMORELAND, PENNSYLVANIA
From 31-OCT-19 16:00:00 to 31-OCT-19 19:14:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Numerous trees were reported to be blown down throughout the county.

Strong Wind in GREENE, PENNSYLVANIA
From 31-OCT-19 17:00:00 to 31-OCT-19 21:44:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree was blown down on W. W. Railroad Road, causing porch damage to a house.  Several other reports of trees down were received from across the county.

Flood in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 16:56:00 to 31-OCT-19 18:00:00 (EST-5)
Location: PUNXSUTAWNEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Flooding was reported on West Mahoning Street.

Flood in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 17:02:00 to 31-OCT-19 18:00:00 (EST-5)
Location: REYNOLDSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Flooding was reported on Pleasant Street.

Strong Wind in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 19:40:00 to 31-OCT-19 19:40:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power lines were reported to be down along Route 949, and the road was closed as a result.

Strong Wind in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 20:01:00 to 31-OCT-19 20:01:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Several trees were reported to be blown down in the county.  Impacted areas included Route 322 in Reynoldsville Borough, Route 949 at Caldwell Corners Road, and Route 536 near Sherry Hollow Road.

Flood in INDIANA, PENNSYLVANIA
From 31-OCT-19 16:03:00 to 31-OCT-19 18:00:00 (EST-5)
Location: SMICKSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Roadway flooding was reported in Smicksburg.

Flood in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 16:12:00 to 31-OCT-19 18:00:00 (EST-5)
Location: PINE CREEK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flooded roads and fields were reported in the Brookville area.

Strong Wind in WASHINGTON, PENNSYLVANIA
From 31-OCT-19 21:07:00 to 31-OCT-19 21:07:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Wires were blown down along Mounts Road near Sugar Hill.  The wires were blown down onto an occupied vehicle, but the man inside was uninjured.

Strong Wind in VENANGO, PENNSYLVANIA
From 31-OCT-19 21:15:00 to 31-OCT-19 21:15:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

A maple tree 18 inches in diameter and 60 feet tall was blown down in Kennerdell.

Strong Wind in ALLEGHENY, PENNSYLVANIA
From 31-OCT-19 18:00:00 to 31-OCT-19 18:00:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A tree and wires were reported to be blown down near Allegheny River Boulevard in Oakmont.

Strong Wind in WESTMORELAND RIDGES, PENNSYLVANIA
From 31-OCT-19 18:08:00 to 31-OCT-19 18:08:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree was reported to be blown down near US Route 30 in Ligonier.

Flood in WASHINGTON, PENNSYLVANIA
From 31-OCT-19 14:45:00 to 31-OCT-19 18:00:00 (EST-5)
Location: BURGETTSTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Burgettstown Fire Department reported that several drains were clogged.

Flood in ALLEGHENY, PENNSYLVANIA
From 31-OCT-19 15:35:00 to 31-OCT-19 17:45:00 (EST-5)
Location: IMPERIAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Several houses in Imperial were reported to be flooded.

Flood in ALLEGHENY, PENNSYLVANIA
From 31-OCT-19 15:40:00 to 31-OCT-19 17:45:00 (EST-5)
Location: OAKDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Clintion Avenue was shut down due to flooding.

Flood in ALLEGHENY, PENNSYLVANIA
From 31-OCT-19 14:56:00 to 31-OCT-19 18:00:00 (EST-5)
Location: IMPERIAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Creek flooding was reported to be reaching homes near Santiago Road.

Flood in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 15:20:00 to 31-OCT-19 21:00:00 (EST-5)
Location: SIGEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Areas of Route 36 were reported to be flooded.

Flood in JEFFERSON, PENNSYLVANIA
From 31-OCT-19 14:40:00 to 31-OCT-19 18:00:00 (EST-5)
Location: CORSICA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Route 322 was closed between Norton Way and Pine Street by flooding.

Flood in ALLEGHENY, PENNSYLVANIA
From 31-OCT-19 14:43:00 to 31-OCT-19 18:00:00 (EST-5)
Location: MONTOUR JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Street flooding was reported in Coraopolis.

Flood in WASHINGTON, PENNSYLVANIA
From 31-OCT-19 14:43:00 to 31-OCT-19 18:00:00 (EST-5)
Location: BURGETTSTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A private retention pond was overflowing on to State Route 18 near Short Street.

Flood in WASHINGTON, PENNSYLVANIA
From 31-OCT-19 14:44:00 to 31-OCT-19 18:00:00 (EST-5)
Location: BURGETTSTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding was reported at the Rite-Aid at 1340 Main Street.