Hot and humid conditions existed over the mid-Atlantic on July 6, with a cold front well northwest over the Great Lakes and southern Canada. As temperatures rose into the 90s with dew points in the upper 60s and low 70s, strong instability built over the region. A pre-frontal trough and a fast moving upper level disturbance provided some lift, which helped convection develop by mid afternoon. Convection was initially concentrated over northern Pennsylvania and New York, near the better forcing, but propagated southeastward with time. Shear was weak to moderate but sufficient to allow some storm organization into multi-cellular and linear segments. A number of storms became severe, producing damaging winds and some hail. As storms moved southeast, outflow boundaries moving even further south helped ignite additional convection, some severe, which continued into the early overnight hours. The early overnight convection was also noted to be especially prolific with regard to lightning.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 06-JUL-21 19:56:00 to 06-JUL-21 19:56:00 (EST-5)
Location: UPPER BLACK EDDY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A large tree fell and other branches and limbs were downed in the area from a likely downburst. Time estimated from radar.

Hail in MONTGOMERY, PENNSYLVANIA
From 06-JUL-21 16:54:00 to 06-JUL-21 16:54:00 (EST-5)
Location: ARDMORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to quarter size. Report via social media. Time estimated from radar.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 06-JUL-21 19:27:00 to 06-JUL-21 19:27:00 (EST-5)
Location: FULLERTON
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 06-JUL-21 16:05:00 to 06-JUL-21 16:05:00 (EST-5)
Location: EFFORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several small trees brought down power lines.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 06-JUL-21 17:19:00 to 06-JUL-21 17:19:00 (EST-5)
Location: LAURYS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

A tree was downed into wires. Time estimated from radar.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 06-JUL-21 15:57:00 to 06-JUL-21 15:57:00 (EST-5)
Location: MARTINS CREEK JCT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

A tree was downed into wires. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 06-JUL-21 16:46:00 to 06-JUL-21 16:46:00 (EST-5)
Location: MINISINK HILLS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A few trees were downed. Report via social media. Time estimated from radar.

Hail in MONTGOMERY, PENNSYLVANIA
From 06-JUL-21 17:06:00 to 06-JUL-21 17:06:00 (EST-5)
Location: WYNNEWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 06-JUL-21 16:30:00 to 06-JUL-21 16:30:00 (EST-5)
Location: HARTRANFT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs were downed on Jefferson Ave. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 06-JUL-21 15:45:00 to 06-JUL-21 15:45:00 (EST-5)
Location: POCONO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tree fell on a property, narrowly missing two vehicles. Time estimated from radar.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 06-JUL-21 16:41:00 to 06-JUL-21 16:41:00 (EST-5)
Location: BIRCHRUNVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

A tree brought down a transformer and wires. Time estimated from radar.

Hail in MONROE, PENNSYLVANIA
From 06-JUL-21 16:10:00 to 06-JUL-21 16:10:00 (EST-5)
Location: EFFORT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONTGOMERY, PENNSYLVANIA
From 06-JUL-21 16:16:00 to 06-JUL-21 16:16:00 (EST-5)
Location: EAGLEVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in NORTHAMPTON, PENNSYLVANIA
From 06-JUL-21 16:50:00 to 06-JUL-21 16:50:00 (EST-5)
Location: DANIELSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 06-JUL-21 19:56:00 to 06-JUL-21 19:56:00 (EST-5)
Location: UHLERSTOWN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple large trees were downed on Uhlerstown Hill Rd near Tinicum Twp. Time estimated from radar.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 06-JUL-21 22:04:00 to 06-JUL-21 22:04:00 (EST-5)
Location: (PNE)NE ARPT PHILADE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Trees were split near Decatur Rd with multiple large limbs and smaller branches downed. Time estimated from radar.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 06-JUL-21 22:09:00 to 06-JUL-21 22:09:00 (EST-5)
Location: TACONY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report of downed trees or power lines.

Hail in MONTGOMERY, PENNSYLVANIA
From 06-JUL-21 16:25:00 to 06-JUL-21 16:25:00 (EST-5)
Location: HARTRANFT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Report via social media.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 06-JUL-21 16:58:00 to 06-JUL-21 16:58:00 (EST-5)
Location: WEST BANGOR
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A tree was downed in the area. Report via social media. Time estimated from radar.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 06-JUL-21 22:14:00 to 06-JUL-21 22:14:00 (EST-5)
Location: TACONY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

An mPing report of tree damage.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 06-JUL-21 15:48:00 to 06-JUL-21 15:48:00 (EST-5)
Location: SNYDERSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

A tree was downed in wires. Time estimated from radar.

Hail in LEHIGH, PENNSYLVANIA
From 06-JUL-21 17:17:00 to 06-JUL-21 17:17:00 (EST-5)
Location: FULLERTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in NORTHAMPTON, PENNSYLVANIA
From 06-JUL-21 17:20:00 to 06-JUL-21 17:20:00 (EST-5)
Location: BETHLEHEM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 06-JUL-21 17:06:00 to 06-JUL-21 17:06:00 (EST-5)
Location: TROOPER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree was downed at the Jeffersonville Golf Course. Time estimated from radar.

Hail in CHESTER, PENNSYLVANIA
From 06-JUL-21 17:00:00 to 06-JUL-21 17:00:00 (EST-5)
Location: PHOENIXVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MONTGOMERY, PENNSYLVANIA
From 06-JUL-21 17:00:00 to 06-JUL-21 17:00:00 (EST-5)
Location: PORT PROVIDENCE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 06-JUL-21 16:53:00 to 06-JUL-21 16:53:00 (EST-5)
Location: SAYLORSBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

A tree was downed into wires. Time estimated from radar.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 06-JUL-21 17:19:00 to 06-JUL-21 17:19:00 (EST-5)
Location: MC ILLHANEY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Utility Company

A tree was downed into wires. Time estimated from radar.