A hot and humid airmass with weak boundaries led to slow moving strong to severe thunderstorms with damaging winds, hail and flooding. A few thousand people lost power.

Flood in PHILADELPHIA, PENNSYLVANIA
From 02-AUG-17 12:23:00 to 02-AUG-17 13:23:00 (EST-5)
Location: MANAYUNK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding at route 1 and I-76.

Flood in PHILADELPHIA, PENNSYLVANIA
From 02-AUG-17 13:13:00 to 02-AUG-17 14:13:00 (EST-5)
Location: PHILADELPHIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on I-95 north at exit 17 and PA-611.

Flood in PHILADELPHIA, PENNSYLVANIA
From 02-AUG-17 13:15:00 to 02-AUG-17 14:15:00 (EST-5)
Location: PHILADELPHIA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on 95 south at exit 19.

Flood in NORTHAMPTON, PENNSYLVANIA
From 02-AUG-17 13:45:00 to 02-AUG-17 14:45:00 (EST-5)
Location: SOUTH EASTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A few roads closed due to flooding.

Flood in BUCKS, PENNSYLVANIA
From 03-AUG-17 17:06:00 to 03-AUG-17 18:06:00 (EST-5)
Location: WEST BRISTOL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several roads with water a foot or so deep in spots.

Flood in BERKS, PENNSYLVANIA
From 03-AUG-17 19:57:00 to 03-AUG-17 20:57:00 (EST-5)
Location: MERTZTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Intersection of Mertztown and Valley roads flooded.

Hail in MONTGOMERY, PENNSYLVANIA
From 02-AUG-17 11:23:00 to 02-AUG-17 11:23:00 (EST-5)
Location: ROCKLEDGE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Nickel size hail.

Hail in MONTGOMERY, PENNSYLVANIA
From 02-AUG-17 12:30:00 to 02-AUG-17 12:30:00 (EST-5)
Location: ABRAMS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Nickel size hail.

Hail in CHESTER, PENNSYLVANIA
From 02-AUG-17 13:11:00 to 02-AUG-17 13:11:00 (EST-5)
Location: CHESTERBROOK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Quarter size hail was measured.

Hail in NORTHAMPTON, PENNSYLVANIA
From 02-AUG-17 13:43:00 to 02-AUG-17 13:43:00 (EST-5)
Location: KLECKNERSVILLE
Magnitude: 0.75 
Reported by: Social Media

Hail sizes ranged from Pea to penny.

Heavy Rain in CARBON, PENNSYLVANIA
From 01-AUG-17 17:44:00 to 01-AUG-17 17:44:00 (EST-5)
Location: BLACK CREEK JCT
Reported by: Mesonet

Over 2 inches of rain fell at this weather underground site.

Heavy Rain in CARBON, PENNSYLVANIA
From 01-AUG-17 18:25:00 to 01-AUG-17 18:25:00 (EST-5)
Location: BLACK CREEK JCT
Reported by: Mesonet

Almost two inches of rain in an hour at this weather underground site.

Heavy Rain in MONROE, PENNSYLVANIA
From 02-AUG-17 12:53:00 to 02-AUG-17 12:53:00 (EST-5)
Location: MT POCONO ARPT
Reported by: ASOS

Over two inches of rain fell in six hours.

Heavy Rain in BUCKS, PENNSYLVANIA
From 03-AUG-17 16:24:00 to 03-AUG-17 16:24:00 (EST-5)
Location: EDGELY
Reported by: Mesonet

One and a half inches in just over 25 minutes.

Heavy Rain in BUCKS, PENNSYLVANIA
From 03-AUG-17 18:28:00 to 03-AUG-17 18:28:00 (EST-5)
Location: EDGELY
Reported by: Mesonet

Over 4 inches of rain fell.

Lightning in MONTGOMERY, PENNSYLVANIA
From 02-AUG-17 12:13:00 to 02-AUG-17 12:13:00 (EST-5)
Location: FLOURTOWN
Property damage: 0.01K
Crop damage: 0.00K
Reported by: Amateur Radio

Lightning took down wires leading to a structure fire.

Lightning in MONTGOMERY, PENNSYLVANIA
From 02-AUG-17 12:35:00 to 02-AUG-17 12:35:00 (EST-5)
Location: ABRAMS
Property damage: 0.01K
Crop damage: 0.00K
Reported by: Social Media

Tree struck by lightning.

Lightning in NORTHAMPTON, PENNSYLVANIA
From 03-AUG-17 19:24:00 to 03-AUG-17 19:24:00 (EST-5)
Location: WIND GAP
Property damage: 0.01K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Lightning struck a Chimney.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 02-AUG-17 13:05:00 to 02-AUG-17 13:05:00 (EST-5)
Location: BEDMINSTER
Magnitude: 52.00 EG
Property damage: 0.01K
Crop damage: 0.00K
Reported by: State Official

A tree was taken down due to thunderstorm winds in Bedminster.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 02-AUG-17 13:05:00 to 02-AUG-17 13:05:00 (EST-5)
Location: APPLEBACHSVILLE
Magnitude: 52.00 EG
Reported by: State Official

A tree was taken down by thunderstorm winds in Haycock.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 02-AUG-17 13:05:00 to 02-AUG-17 13:05:00 (EST-5)
Location: PLEASANT VLY
Magnitude: 52.00 EG
Reported by: State Official

Thunderstorm winds took down a tree in Springfield.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 03-AUG-17 16:28:00 to 03-AUG-17 16:28:00 (EST-5)
Location: TULLYTOWN
Magnitude: 52.00 EG
Reported by: Social Media

A twenty foot tree snapped due to thunderstorm winds and hit a car.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 04-AUG-17 23:35:00 to 04-AUG-17 23:35:00 (EST-5)
Location: SINKING SPG
Magnitude: 52.00 EG
Reported by: State Official

A tree was reported down due to thunderstorm winds.

Flood in MONTGOMERY, PENNSYLVANIA
From 05-AUG-17 01:30:00 to 05-AUG-17 01:30:00 (EST-5)
Location: PENCOYD STATION
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A lane on Interstate 76 was closed for a few hours.

Heavy Rain in BERKS, PENNSYLVANIA
From 05-AUG-17 01:49:00 to 05-AUG-17 01:49:00 (EST-5)
Location: KEMPTON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Almost five inches of rain fell in 12 hours.

Lightning in NORTHAMPTON, PENNSYLVANIA
From 02-AUG-17 13:00:00 to 02-AUG-17 13:00:00 (EST-5)
Location: NAZARETH
Property damage: 0.01K
Reported by: Broadcast Media

Lightning caused a house fire.