A frontal boundary stalled over the mid-Atlantic on July 22. An approaching upper level trough helped spur the development of a wave of low pressure along the front. A very favorable environment for convection and severe weather developed along and south of this boundary. Extremely high moisture content was present in the air mass, allowing moderate to strong instability to build during the heating of the day. The frontal boundary and developing low also helped to enhance both low level and deep layer shear to respectably strong values for midsummer. The result was a day of widespread severe weather. Discrete storms early in the afternoon gave way to a powerful mesoscale convective system in the evening which produced widespread damaging winds with considerable damage over a large area.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 22-JUL-19 16:19:00 to 22-JUL-19 16:19:00 (EST-5)
Location: VERA CRUZ
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A tree was downed on I-476 south of the I-78 interchange. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 22-JUL-19 16:22:00 to 22-JUL-19 16:22:00 (EST-5)
Location: SPRINGFIELD
Magnitude: 70.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread damage was reported in Springfield with numerous trees and wires down. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 22-JUL-19 16:22:00 to 22-JUL-19 16:22:00 (EST-5)
Location: WESTGATE HILLS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A downed tree closed US-22 between Routes 512 and 191. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 22-JUL-19 16:26:00 to 22-JUL-19 16:26:00 (EST-5)
Location: SHANESVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed at the intersection of Koch Rd and Ironstone Dr. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 22-JUL-19 16:30:00 to 22-JUL-19 16:30:00 (EST-5)
Location: SOUTH EASTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Highway 611 was closed between Browns Dr and Cedarville Rd from multiple downed trees. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 22-JUL-19 16:34:00 to 22-JUL-19 16:34:00 (EST-5)
Location: BAEDERWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Two eight-inch diameter tree limbs blocked Cloverly Ln near Sewell Ln. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 22-JUL-19 16:37:00 to 22-JUL-19 16:37:00 (EST-5)
Location: RICHLANDTOWN
Magnitude: 55.00 EG
Crop damage: 0.00K
Reported by: Public

Multiple trees and wires were reported down. One or more houses in the area reportedly caught fire. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 22-JUL-19 16:40:00 to 22-JUL-19 16:40:00 (EST-5)
Location: STANWOOD GARDENS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple large trees were downed between Woodbine Ave and Street Rd. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 22-JUL-19 16:40:00 to 22-JUL-19 16:40:00 (EST-5)
Location: STANWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

A downed tree was reported on I-276 near the Neshaminy Falls Interchange. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 22-JUL-19 16:50:00 to 22-JUL-19 16:50:00 (EST-5)
Location: CHADDS FORD JCT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A downed tree or limb blocked US-1.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 22-JUL-19 16:55:00 to 22-JUL-19 16:55:00 (EST-5)
Location: MORRISVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were reported down in this area.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 22-JUL-19 19:50:00 to 22-JUL-19 19:50:00 (EST-5)
Location: KUTZTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Downed tree and wires on Saucony Rd. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 22-JUL-19 20:00:00 to 22-JUL-19 20:00:00 (EST-5)
Location: NEW TRIPOLI
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

At least one downed utility reported. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 22-JUL-19 19:40:00 to 22-JUL-19 19:40:00 (EST-5)
Location: LEESPORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Downed power cables on NJ-61 between Wall St and Orchard Ln. Time estimated from radar.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 22-JUL-19 16:15:00 to 22-JUL-19 16:15:00 (EST-5)
Location: GRACE PARK
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated 80mph wind gusts. Nearby reports and observations lent credence to the estimate.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 22-JUL-19 16:28:00 to 22-JUL-19 16:28:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Measured by the ASOS at Philadelphia International Airport.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 22-JUL-19 16:30:00 to 22-JUL-19 16:30:00 (EST-5)
Location: TACONY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Gusts estimated to 70mph. Trees and power lines downed in the area. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 22-JUL-19 16:42:00 to 22-JUL-19 16:42:00 (EST-5)
Location: WEST BRISTOL
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Burlington NOS gauge.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 22-JUL-19 16:48:00 to 22-JUL-19 16:48:00 (EST-5)
Location: FAIRLESS
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Measured by Newbold NOS gauge.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 22-JUL-19 15:40:00 to 22-JUL-19 15:40:00 (EST-5)
Location: OAKBOURNE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree or limb blocked the roadway on Spruce Ave at Jones Ln. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 22-JUL-19 15:43:00 to 22-JUL-19 15:43:00 (EST-5)
Location: OAKBOURNE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was downed on Baywood Rd at Tower Course Dr. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 22-JUL-19 15:55:00 to 22-JUL-19 15:55:00 (EST-5)
Location: NEW SMITHVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees were downed on Willow Run Rd. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 22-JUL-19 15:55:00 to 22-JUL-19 15:55:00 (EST-5)
Location: HYNEMANSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees and wires were downed in Weisenberg Twp. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 22-JUL-19 16:10:00 to 22-JUL-19 16:10:00 (EST-5)
Location: MALVERN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed onto wires on N Warren Ave at Pennsylvania Ave. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 22-JUL-19 16:10:00 to 22-JUL-19 16:10:00 (EST-5)
Location: OLD ZIONSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees and wires were downed in Upper Milford.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 22-JUL-19 16:11:00 to 22-JUL-19 16:11:00 (EST-5)
Location: OLD ZIONSVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple trees downed on and near Kings Highway. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 22-JUL-19 16:12:00 to 22-JUL-19 16:12:00 (EST-5)
Location: DALE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

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

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 22-JUL-19 16:12:00 to 22-JUL-19 16:12:00 (EST-5)
Location: BIRMINGHAM
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Multiple trees were downed on and near Wylie Rd. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 22-JUL-19 16:15:00 to 22-JUL-19 16:15:00 (EST-5)
Location: NORTH CATASAUGUA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Downed tree on Howertown Rd. Time estimated from radar.

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

Downed utility pole on Paoli Pike. Time estimated from radar.