A cold front along with a robust shortwave trough gradually approached the eastern mid-Atlantic on August 7. A pre-frontal surface trough was also in place. Ahead of the front, a warm and moist air mass built through the day. Strong instability developed, along with moderate wind shear. Convection initially developed along the pre-frontal trough. Later, a squall line associated with the front and trough combination moved through the region. Given the strong instability and adequate shear, numerous storms became severe, primarily producing damaging winds. In addition, low level shear was sufficient to help spawn a couple of brief tornadoes in New Jersey.

Hail in LEHIGH, PENNSYLVANIA
From 07-AUG-19 14:28:00 to 07-AUG-19 14:28:00 (EST-5)
Location: OREFIELD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to penny size was reported.

Lightning in BUCKS, PENNSYLVANIA
From 07-AUG-19 15:28:00 to 07-AUG-19 15:28:00 (EST-5)
Location: HOLLAND
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A house was struck by lightning on Plumly Way. Smoke and fire were visible as crews responded.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 07-AUG-19 13:07:00 to 07-AUG-19 13:07:00 (EST-5)
Location: WINTERSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees and wires were downed with power out in the area of Parkside Inn Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 07-AUG-19 13:16:00 to 07-AUG-19 13:16:00 (EST-5)
Location: NEW SHAEFFERSTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed on Summer Mountain Rd just east of Zerbe Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 07-AUG-19 13:40:00 to 07-AUG-19 13:40:00 (EST-5)
Location: WEST HAMBURG
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant damage was reported in the area of 323 Clayton Ave in Tilden Twp. Numerous trees were downed and the roof of an old barn was removed. The local EMA coordinator believed straight line winds to be responsible, which was corroborated by radar data. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 07-AUG-19 13:40:00 to 07-AUG-19 13:40:00 (EST-5)
Location: BERWYN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A large tree and numerous limbs were downed in the area. Power lines were also down in the roadway with one on fire. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 14:02:00 to 07-AUG-19 14:02:00 (EST-5)
Location: NORTH WALES
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Wires were downed on Sumneytown Pike near South Broad St with road closures required. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 14:08:00 to 07-AUG-19 14:08:00 (EST-5)
Location: LANSDALE
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

A tree fell and struck two moving vehicles on Sumneytown Pike eastbound west of Kristin Circle.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 14:13:00 to 07-AUG-19 14:13:00 (EST-5)
Location: HATFIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Trees and wires were downed on Unionville Pike between Bethlehem Pike and North Penn Rd. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 07-AUG-19 14:18:00 to 07-AUG-19 14:18:00 (EST-5)
Location: CROSS KEYS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Downed power lines affected train service in the Doylestown vicinity. Time and location approximate.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 07-AUG-19 14:25:00 to 07-AUG-19 14:25:00 (EST-5)
Location: CLAUSSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree fell onto a house. Wires also reported down in the area. Time and location approximated.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 07-AUG-19 14:28:00 to 07-AUG-19 14:28:00 (EST-5)
Location: GUTH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Tree downed on Pond Rd. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 07-AUG-19 14:40:00 to 07-AUG-19 14:40:00 (EST-5)
Location: BETHLEHEM
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple reports of trees down around Bethlehem.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 07-AUG-19 14:47:00 to 07-AUG-19 14:47:00 (EST-5)
Location: CENTER VLY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Downed trees and wires reported in the area. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 14:47:00 to 07-AUG-19 14:47:00 (EST-5)
Location: RYDAL
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 Meetinghouse Rd and Delene Rd. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 07-AUG-19 14:48:00 to 07-AUG-19 14:48:00 (EST-5)
Location: FREIDENSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report of trees uprooted or snapped. Time estimated from radar and nearby reports.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 07-AUG-19 15:16:00 to 07-AUG-19 15:16:00 (EST-5)
Location: WAYNE JCT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree downed on Kelly Dr. Time estimated from radar.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 07-AUG-19 15:17:00 to 07-AUG-19 15:17:00 (EST-5)
Location: MANAYUNK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees downed on West River Dr and Lincoln Dr. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 15:24:00 to 07-AUG-19 15:24:00 (EST-5)
Location: CHELTENHAM
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Broadcast Media

Social media video of a large tree blown down and damaging property at a residence. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 15:38:00 to 07-AUG-19 15:38:00 (EST-5)
Location: GLENSIDE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

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

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 15:49:00 to 07-AUG-19 15:49:00 (EST-5)
Location: ORELAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Power lines downed near the Oreland Station. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 15:52:00 to 07-AUG-19 15:52:00 (EST-5)
Location: WYNNEWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A downed tree blocked Violet Ln near Periwinkle Ln. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 07-AUG-19 16:02:00 to 07-AUG-19 16:02:00 (EST-5)
Location: SPRINGFIELD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A tree and power lines were downed on Hillcrest Rd. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 07-AUG-19 16:12:00 to 07-AUG-19 16:12:00 (EST-5)
Location: BRYN ATHYN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A downed tree blocked Welsh Rd near Inverness Ln. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 07-AUG-19 16:53:00 to 07-AUG-19 16:53:00 (EST-5)
Location: ANDALUSIA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed in wires on State Rd. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 07-AUG-19 12:27:00 to 07-AUG-19 12:27:00 (EST-5)
Location: TULLYTOWN
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured by a spotter's personal weather station. Tree limbs up to seven inches in diameter were downed.