A thermal, lee side trough drifted eastward across the mid-Atlantic on August 21. Multiple shortwave upper level disturbances also moved across the area during the day, providing a good source of lift. With the region in an area of warm and humid air south of a warm front, strong instability built over the course of the day, with moderate wind shear also present. This led to widespread showers and thunderstorms, some of which became strong to severe and produced damaging winds.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 21-AUG-19 15:04:00 to 21-AUG-19 15:04:00 (EST-5)
Location: HIESTAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A tree was downed near the intersection of Hoffecker Rd and French Creek Rd. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 21-AUG-19 15:05:00 to 21-AUG-19 15:05:00 (EST-5)
Location: HIESTAND
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A downed tree blocked the access road to the East Vincent Twp police department. Time based on a dispatch report.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 21-AUG-19 15:17:00 to 21-AUG-19 15:17:00 (EST-5)
Location: PHOENIXVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several large tree limbs were snapped. Time estimated from radar.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 21-AUG-19 15:31:00 to 21-AUG-19 15:31:00 (EST-5)
Location: MOGEES
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

A downed tree blocked Chelsea Rd near Cherry Ln. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 21-AUG-19 14:14:00 to 21-AUG-19 14:14:00 (EST-5)
Location: GEIGERTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

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

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 21-AUG-19 14:14:00 to 21-AUG-19 14:14:00 (EST-5)
Location: LORANE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was downed near Lincoln Rd and Lorane Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 21-AUG-19 14:33:00 to 21-AUG-19 14:33:00 (EST-5)
Location: UNIONVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree and wires were downed near the intersection of Black Matt Rd and Yocum Rd. Time estimated from radar.

Hail in BERKS, PENNSYLVANIA
From 21-AUG-19 14:00:00 to 21-AUG-19 14:00:00 (EST-5)
Location: MOHNTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media report relayed by a trained spotter of estimated quarter size hail. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 21-AUG-19 14:00:00 to 21-AUG-19 14:00:00 (EST-5)
Location: MOHNTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A social media report relayed by a trained spotter of trees down in the area. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 21-AUG-19 14:03:00 to 21-AUG-19 14:03:00 (EST-5)
Location: PLOWVILLE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous trees were downed between Shea Dr and Diehl Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 21-AUG-19 14:08:00 to 21-AUG-19 14:08:00 (EST-5)
Location: PLOWVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several reports were received of trees and utilities down around Plow Rd in Robeson Twp. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 21-AUG-19 14:38:00 to 21-AUG-19 14:38:00 (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 on Bechtel Rd. Time estimated from radar.