A warm front lifted across the mid-Atlantic early in the morning of August 27, stalling over southern New England. A robust mid-level disturbance along with multiple waves of surface low pressure then tracked along the front during the day. Over southern New England and southern New York, a uniquely favorable environment of high wind shear and high instability contributed to a significant severe weather outbreak. Further south, shear and forcing were a bit weaker. However, thunderstorms eventually progressed southward into the mid-Atlantic, fueled in part by outflow from storms to the north. Some of these storms became severe and produced damaging winds.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 27-AUG-20 19:42:00 to 27-AUG-20 19:42:00 (EST-5)
Location: BUTZTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Chardonnay Dr. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 27-AUG-20 19:05:00 to 27-AUG-20 19:05:00 (EST-5)
Location: SEIPSTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Kines Mill Rd. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 27-AUG-20 19:09:00 to 27-AUG-20 19:09:00 (EST-5)
Location: GERMANSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Bachman Rd near Germansville. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 27-AUG-20 19:18:00 to 27-AUG-20 19:18:00 (EST-5)
Location: (RDG)SPAATZ FLD READ
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Victory Circle. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 27-AUG-20 19:20:00 to 27-AUG-20 19:20:00 (EST-5)
Location: HIGHLAND PARK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Several reports of downed trees and power lines in the vicinity of Tumble Creek Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 27-AUG-20 19:21:00 to 27-AUG-20 19:21:00 (EST-5)
Location: BERKSHIRE HGTS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A tree was downed into a house on Jeffrey Rd. Time based on a reported wind gust at nearby Reading Regional Airport.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 27-AUG-20 19:22:00 to 27-AUG-20 19:22:00 (EST-5)
Location: BERKSHIRE HGTS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The tops of two large oak trees snapped off about 30 feet up the trunk. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 27-AUG-20 19:22:00 to 27-AUG-20 19:22:00 (EST-5)
Location: RIEGELSVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple large trees were downed in Riegelsville, some blocking roads. Power outages were reported. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 27-AUG-20 19:22:00 to 27-AUG-20 19:22:00 (EST-5)
Location: COFFEETOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Gaffney Hill Rd. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 27-AUG-20 19:23:00 to 27-AUG-20 19:23:00 (EST-5)
Location: WYOMISSING HILLS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near State Hill Rd in Wyomissing. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 27-AUG-20 19:27:00 to 27-AUG-20 19:27:00 (EST-5)
Location: MT PENN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Mineral Spring Rd in Reading. Time estimated from radar.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 27-AUG-20 19:21:00 to 27-AUG-20 19:21:00 (EST-5)
Location: (RDG)SPAATZ FLD READ
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Measured at Reading Regional Airport (KRDG).

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 27-AUG-20 19:25:00 to 27-AUG-20 19:25:00 (EST-5)
Location: READING
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Measured by a CWOP station. This station is at a very exposed location atop the William Penn Memorial Fire Tower at an elevation of 1115 feet.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 27-AUG-20 19:27:00 to 27-AUG-20 19:27:00 (EST-5)
Location: RIEGELSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Sunnyside Dr on the Northampton and Bucks County line. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 27-AUG-20 19:30:00 to 27-AUG-20 19:30:00 (EST-5)
Location: CETRONIA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Several reports of downed trees and wires near and west of Allentown. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 27-AUG-20 19:30:00 to 27-AUG-20 19:30:00 (EST-5)
Location: (ABE)LEHIGH VALLEY INTERNATIONAL AIRPORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near North Irving St in Whitehall Twp. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 27-AUG-20 19:30:00 to 27-AUG-20 19:30:00 (EST-5)
Location: FOUNTAIN HILL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Several reports of downed trees and wires near and southeast of Bethlehem Twp. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 27-AUG-20 19:36:00 to 27-AUG-20 19:36:00 (EST-5)
Location: FOUNTAIN HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near South Mountain Park. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 27-AUG-20 19:40:00 to 27-AUG-20 19:40:00 (EST-5)
Location: FERNDALE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Gallows Hill Rd. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 27-AUG-20 19:40:00 to 27-AUG-20 19:40:00 (EST-5)
Location: FREEMANSBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several trees were downed in the Bethlehem area. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 27-AUG-20 19:42:00 to 27-AUG-20 19:42:00 (EST-5)
Location: LIMEPORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Chestnut Hill Rd. Time estimated from radar.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 27-AUG-20 19:47:00 to 27-AUG-20 19:47:00 (EST-5)
Location: FERNDALE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

Trees and wires were downed near Stony Garden Rd. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 27-AUG-20 19:45:00 to 27-AUG-20 19:45:00 (EST-5)
Location: COFFEETOWN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Photos were received of numerous trees down throughout Williams Twp. Some minor shingle damage was reported as well. Time estimated from radar.