An impulse riding along a west to east boundary stalled near the Mason-Dixon line produced severe thunderstorms and heavy rain across sections of extreme southeast Pennsylvania from late afternoon through the evening hours on August 7th. Strong winds knocked down trees, and torrential downpours on ground already saturated from the remnants of Hurricane Isaias produced flash flooding on many roadways and small streams in the area.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:02:00 to 07-AUG-20 16:02:00 (EST-5)
Location: SADSBURYVILLE
Magnitude: 50.00 EG
Reported by: Department of Highways

Downed tree in wires on Old Wilmington Road and Oak Street in Sadsburyville. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:03:00 to 07-AUG-20 16:03:00 (EST-5)
Location: HAYESVILLE
Magnitude: 50.00 EG
Reported by: Department of Highways

Downed tree into wires on PA 472 near Oxford. Time estimated from radar.

Flash Flood in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:50:00 to 07-AUG-20 19:00:00 (EST-5)
Location: LONDON GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A water rescue took place on McCue Road at Woodview Road in London Grove Township.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:15:00 to 07-AUG-20 19:00:00 (EST-5)
Location: BOOTHWYN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Road closures in Upper Chichester Township due to flooding.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:15:00 to 07-AUG-20 19:00:00 (EST-5)
Location: PILGRIM GARDENS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A water rescue took place on Old Marple Road in Marple Township.

Flash Flood in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:45:00 to 07-AUG-20 19:00:00 (EST-5)
Location: KAOLIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Kaolin Road was closed at Caldwell Lane in Kennett Township due to flooding.  A water rescue took place on West Hillendale Road at Chandler Mill Road in Kennett Township.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:25:00 to 07-AUG-20 19:30:00 (EST-5)
Location: WARD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A water rescue took place on Baltimore Pike at Cheyney Road in Concord Township.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:30:00 to 07-AUG-20 19:30:00 (EST-5)
Location: HAMBYS CORNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The West Branch of Naaman Creek overflowed its banks in Upper Chichester Township and Lower Chichester Township.  At least one local business was flooded.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:40:00 to 07-AUG-20 19:30:00 (EST-5)
Location: MEDIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

US Route 1 was closed at several locations in Middletown Township due to flooding.

Flash Flood in CHESTER, PENNSYLVANIA
From 07-AUG-20 17:20:00 to 07-AUG-20 20:30:00 (EST-5)
Location: FIVE PTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding occurred along the Red Clay Creek downstream from Kennett Square.

Flash Flood in CHESTER, PENNSYLVANIA
From 07-AUG-20 18:00:00 to 07-AUG-20 20:30:00 (EST-5)
Location: STRICKERSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Moderate flooding occurred along the White Clay Creek near Strickersville.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:45:00 to 07-AUG-20 20:40:00 (EST-5)
Location: MOYLAN ROSE VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Minor flooding occurred along Ridley Creek near Media.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:15:00 to 07-AUG-20 17:15:00 (EST-5)
Location: MEDIA
Magnitude: 50.00 EG
Reported by: Trained Spotter

Several trees down across the southern portion of Delaware County in the vicinity of Ludwigs Corner.  Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 07-AUG-20 17:50:00 to 07-AUG-20 17:50:00 (EST-5)
Location: YARDLEY
Magnitude: 50.00 EG
Reported by: State Official

Several trees and wires reported down in the area of Yardley and Woodside. Time estimated from radar.

Flash Flood in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:20:00 to 07-AUG-20 18:30:00 (EST-5)
Location: PARKESBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A water rescue took place on Maple Street at South Culvert Street in Parkesburg.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:05:00 to 07-AUG-20 16:05:00 (EST-5)
Location: COCHRANVILLE
Magnitude: 50.00 EG
Reported by: State Official

Tree blown down blocking southbound lane at the intersection of Limestone Road and Gap-Newport Pike.  Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:12:00 to 07-AUG-20 16:12:00 (EST-5)
Location: REECEVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Reported by: Utility Company

Several trees and poles down just north of Fisherville Road near Reeceville. Time estimated from radar.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 18:05:00 to 07-AUG-20 20:30:00 (EST-5)
Location: VILLAGE GREEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Major flooding occurred along Chester Creek in the Chester area.

Flash Flood in BUCKS, PENNSYLVANIA
From 07-AUG-20 17:50:00 to 07-AUG-20 20:05:00 (EST-5)
Location: PERKASIE PENRIDGE AR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Moderate flooding occurred along the East Branch of the Perkiomen Creek in the Perkasie and Dublin area.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:08:00 to 07-AUG-20 16:08:00 (EST-5)
Location: DALEVILLE
Magnitude: 50.00 EG
Reported by: Fire Department/Rescue

Several trees down along portions of Route 41 near Daleville.  Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:40:00 to 07-AUG-20 16:40:00 (EST-5)
Location: CHATWOOD
Magnitude: 50.00 EG
Reported by: Department of Highways

Downed tree in wires on Wesstown-Thornton Road and Five Points Road near Chatwood. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:50:00 to 07-AUG-20 16:50:00 (EST-5)
Location: LUDWIGS CORNER
Magnitude: 50.00 EG
Reported by: Law Enforcement

Tree reported down at Black Horse Road in West Vincent Township. Time estimated from dispatch.

Flash Flood in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:45:00 to 07-AUG-20 18:30:00 (EST-5)
Location: KENNETT SQUARE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A vehicle was trapped in flood waters on West South Street at Harvey Circle in Kennett Square.

Flash Flood in CHESTER, PENNSYLVANIA
From 07-AUG-20 16:55:00 to 07-AUG-20 19:00:00 (EST-5)
Location: TOUGHKENAMON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Bancroft Road was under water at Crestview Drive in New Garden Township.  Broad Run Road was closed at Newark Road in New Garden Township due to flooding.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:00:00 to 07-AUG-20 19:00:00 (EST-5)
Location: TRAINER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A water rescue took place in Trainer.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:10:00 to 07-AUG-20 19:00:00 (EST-5)
Location: VILLAGE GREEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A water rescue took place on Pennell Road at Weir Road in Aston Township.  Other water rescues occurred on Raymond Avenue and on Concord Road in Aston Township.

Flash Flood in DELAWARE, PENNSYLVANIA
From 07-AUG-20 17:10:00 to 07-AUG-20 19:00:00 (EST-5)
Location: BROOKHAVEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Dutton Mill Road was closed at Chester Creek Road in Middletown Township due to flooding.