A severe weather outbreak impacted the mid-Atlantic from the evening of October 31 through the pre-dawn hours of November 1. A strong area of low pressure moved through the eastern Great Lakes on the 31st. Ahead of it, strong southerly flow advected an unseasonably warm and moist air mass into the mid-Atlantic. This generated enough instability, combined with extremely strong wind fields, to produce a low topped line of severe convection which tracked across the entire region. Widespread damaging wind occurred as the squall line moved through, along with a couple of short lived embedded tornadoes.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 31-OCT-19 22:48:00 to 31-OCT-19 22:48:00 (EST-5)
Location: EDISON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees were uprooted in the Pebble Woods neighborhood. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 31-OCT-19 22:49:00 to 31-OCT-19 22:49:00 (EST-5)
Location: WARMINSTER
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree fell onto and destroyed a house. No injuries were reported.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 31-OCT-19 22:52:00 to 31-OCT-19 22:52:00 (EST-5)
Location: SOLEBURY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree and wires were downed near the intersection of Sugan Rd and Phillips Mill Rd. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 31-OCT-19 22:54:00 to 31-OCT-19 22:54:00 (EST-5)
Location: RUSHLAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed on Swamp Rd near Second Street Pike. Time estimated from radar.

Tornado in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:25:00 to 31-OCT-19 22:26:00 (EST-5)
Location: GLEN MILLS
Tornado F-scale: EF2
Reported by: NWS Storm Survey

A tornado embedded in a larger area of straight line
winds touched down just southwest of the Cobblestone at
Thornbury subdivision in the town of Glen Mills,
Delaware County at 11:25 pm EDT, Thursday, October 31,
2019. Damage near the beginning of the tornado path
along Cheney Road consisted of a few sporadic uprooted
trees and associated collateral damage of adjacent homes.
However, as the tornado reached its maximum EF2
strength, the number and size of uprooted trees increased
with significant associated damage to nearby homes. Three
houses sustained significant damage from the wind itself,
which, based on this survey, peaked around 120 mph. As
the EF2 tornado continued to move northeast, at least two
greenhouses were destroyed before it lifted near the
intersection of Orchard and Broomall Lanes. However,
significant straight line wind damage continued beyond this
intersection with dozens of snapped and uprooted trees,
especially within the Golf Course at Glen Mills, before the
strong winds gradually weakened below severe limits.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 19:30:00 to 31-OCT-19 19:30:00 (EST-5)
Location: BETHEL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Lancaster Ave. Time estimated from radar.

Thunderstorm Wind in CARBON, PENNSYLVANIA
From 31-OCT-19 19:45:00 to 31-OCT-19 19:45:00 (EST-5)
Location: LANSFORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and power lines were downed in the area. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 19:57:00 to 31-OCT-19 19:57:00 (EST-5)
Location: BETHEL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and power lines were downed in the area. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 19:59:00 to 31-OCT-19 19:59:00 (EST-5)
Location: MT AETNA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed onto wires on Temple Rd. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 31-OCT-19 20:09:00 to 31-OCT-19 20:09:00 (EST-5)
Location: POCONO PINES
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Several trees and power lines were downed in the area. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 31-OCT-19 20:10:00 to 31-OCT-19 20:10:00 (EST-5)
Location: PRESERVE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Several reports of downed trees and wires in the Arrowhead Lake area. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 31-OCT-19 20:17:00 to 31-OCT-19 20:17:00 (EST-5)
Location: SCOT RUN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed near the intersection of Brookdale Rd and Frantz Hill Rd. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 31-OCT-19 20:21:00 to 31-OCT-19 20:21:00 (EST-5)
Location: BLAKESLEE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees and wires were downed on Locust Ridge Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 20:23:00 to 31-OCT-19 20:23:00 (EST-5)
Location: SHARTLESVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and power lines were reported down in the area. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 31-OCT-19 20:26:00 to 31-OCT-19 20:26:00 (EST-5)
Location: POCONO MANOR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed on Island Dr. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 31-OCT-19 20:28:00 to 31-OCT-19 20:28:00 (EST-5)
Location: MT POCONO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed on Seneca Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 20:43:00 to 31-OCT-19 20:43:00 (EST-5)
Location: (RDG)SPAATZ FLD READ
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed on US-222 near Highway 183. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 20:52:00 to 31-OCT-19 20:52:00 (EST-5)
Location: BERKLEY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees and power lines were downed near Wileys Rd and Pillar Dr. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 20:57:00 to 31-OCT-19 20:57:00 (EST-5)
Location: BLANDON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and power lines were reported down in the area. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 21:05:00 to 31-OCT-19 21:05:00 (EST-5)
Location: KUTZTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree damage reported via mPing.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 31-OCT-19 21:10:00 to 31-OCT-19 21:10:00 (EST-5)
Location: MONOCACY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A tree was downed on Hillview Rd. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 31-OCT-19 21:14:00 to 31-OCT-19 21:14:00 (EST-5)
Location: FOGELSVILLE
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Public

Public report via social media of downed trees and shingle blown off a home in the area. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 21:16:00 to 31-OCT-19 21:16:00 (EST-5)
Location: KNAUERTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A tree was downed near the intersection of Hill Camp Rd and Chestnut Court. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 21:17:00 to 31-OCT-19 21:17:00 (EST-5)
Location: LUDWIGS CORNER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A tree was downed on Greenridge Rd near Font Rd. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 21:23:00 to 31-OCT-19 21:23:00 (EST-5)
Location: REECEVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A large tree was downed near the intersection of Reeceville Rd and Caln Meetinghouse Rd. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 31-OCT-19 21:28:00 to 31-OCT-19 21:28:00 (EST-5)
Location: NAVARRO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and wires downed on Weaversville Rd. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 31-OCT-19 21:32:00 to 31-OCT-19 21:32:00 (EST-5)
Location: SCIOTA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed near the intersection of Route 209 and Neola Rd. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 31-OCT-19 21:34:00 to 31-OCT-19 21:34:00 (EST-5)
Location: WESTGATE HILLS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Downed utility on PA-512 near Jaindl Blvd. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 31-OCT-19 21:39:00 to 31-OCT-19 21:39:00 (EST-5)
Location: HECKTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Downed tree and wires near the intersection of Newburg Rd and Nazareth-Bethlehem Pike. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 31-OCT-19 21:46:00 to 31-OCT-19 21:46:00 (EST-5)
Location: WEST BANGOR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Downed utility near the intersection of Bangor Rd and Garbaldi Ave. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 22:09:00 to 31-OCT-19 22:09:00 (EST-5)
Location: PLANEBROOK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of damage via mPing.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 22:16:00 to 31-OCT-19 22:16:00 (EST-5)
Location: LONGWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed on US-1 near Schoolhouse Rd. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:21:00 to 31-OCT-19 22:21:00 (EST-5)
Location: THORNTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed on Dilworthtown Rd near Binton Lake Rd. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 22:24:00 to 31-OCT-19 22:24:00 (EST-5)
Location: WESTTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed near the intersection of Route 926 and Westtown Rd. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 22:24:00 to 31-OCT-19 22:24:00 (EST-5)
Location: WEST CHESTER ARPT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed on Fern Hill Rd. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 31-OCT-19 22:29:00 to 31-OCT-19 22:29:00 (EST-5)
Location: KINTNERSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed on PA-611 near Kintner Rd. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:30:00 to 31-OCT-19 22:30:00 (EST-5)
Location: EDGEMONT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large trees and limbs were downed near Providence Rd. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 22:32:00 to 31-OCT-19 22:32:00 (EST-5)
Location: BERWYN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree and wires were downed near the intersection of Sugartown Rd and Fairfield Rd. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:32:00 to 31-OCT-19 22:32:00 (EST-5)
Location: BOOTHWYN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was downed on Bennett Ln. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:32:00 to 31-OCT-19 22:32:00 (EST-5)
Location: NEWTON SQUARE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of damage via mPing.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 31-OCT-19 22:34:00 to 31-OCT-19 22:34:00 (EST-5)
Location: STRAFFORD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were snapped with numerous large limbs down at St. David's Golf Club in Wayne. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:34:00 to 31-OCT-19 22:34:00 (EST-5)
Location: DREXEL HILL
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Public

A large hardwood tree fell onto a parked minivan. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:34:00 to 31-OCT-19 22:34:00 (EST-5)
Location: BROOMALL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public report of damage via mPing.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:34:00 to 31-OCT-19 22:34:00 (EST-5)
Location: ITHAN
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Public

Two trees fell onto a house along Sawmill Rd, resulting in one injury to an occupant. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 31-OCT-19 22:34:00 to 31-OCT-19 22:34:00 (EST-5)
Location: GARRETT HILL
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Public

Several large tree limbs were downed, damaging a home. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 31-OCT-19 22:37:00 to 31-OCT-19 22:37:00 (EST-5)
Location: IVY ROCK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed near the I-76 and I-476 interchange. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 31-OCT-19 22:42:00 to 31-OCT-19 22:42:00 (EST-5)
Location: ERDENHEIM
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees were reported down in the area. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 31-OCT-19 22:42:00 to 31-OCT-19 22:42:00 (EST-5)
Location: AMBLER
Magnitude: 70.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

A house reportedly collapsed as a result on strong wind gusts. One injury was reported. Time estimated from radar.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 31-OCT-19 22:42:00 to 31-OCT-19 22:42:00 (EST-5)
Location: CHESTNUT HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Downed utility near the intersection of Stenton Ave and Hillcrest Ave. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 31-OCT-19 22:44:00 to 31-OCT-19 22:44:00 (EST-5)
Location: AMBLER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed on PA-309 near Lincoln Dr. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 31-OCT-19 22:47:00 to 31-OCT-19 22:47:00 (EST-5)
Location: MORELAND MANOR
Magnitude: 65.00 EG
Crop damage: 0.00K
Reported by: NWS Employee

Several reports of trees and power lines down in the area. Also reports of damage to residential fences, shingles, and siding in Hatboro, Horsham, and Willow Grove. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 31-OCT-19 22:45:00 to 31-OCT-19 22:45:00 (EST-5)
Location: BUCKINGHAM STATION
Magnitude: 70.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were downed across Buckingham Twp. Road closures included but were not limited to Pineville Rd between New Rd and New Hope Rd; Pineville Rd between Street Rd and Stony Hill Rd; Sugar Bottom Rd at Lower Mountain Rd; Upper Mountain Rd between Quarry Rd and Route 413; Ash Mill Rd between Route 202 and Mechanicsville Rd. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 31-OCT-19 22:45:00 to 31-OCT-19 22:45:00 (EST-5)
Location: NESHAMINY
Magnitude: 95.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A National Weather Service survey team determined that straight
line winds were the cause of tree, utility, and collateral
structural damage in the vicinity of Hartsville, Warminster
Township, Bucks County, Pennsylvania on October 31, 2019.
Multiple homes sustained damage from falling trees on and near
Barness Dr, and several utility poles were snapped near their
base along Street Rd. Wind gusts up to 110 mph were responsible
for this damage, although most areas experienced winds of lesser magnitude.