A strong low pressure system moving north through the Great Lakes region, combined with its associated warm front and cold front, copious amounts of moisture, and low level jet, produced strong to severe thunderstorms, heavy rain, flash flooding, and stream flooding in Eastern Pennsylvania late Wednesday afternoon and evening, February 24th, with stream flooding continuing into Thursday, February 25th. Most electric outlets reported thousands of power outages.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 24-FEB-16 19:42:00 to 24-FEB-16 19:42:00 (EST-5)
Location: CONESTOGA
Magnitude: 55.00 MG
Reported by: Trained Spotter

A 63 MPH thunderstorm wind gust was measured near Elverson.

Strong Wind in BERKS, PENNSYLVANIA
From 24-FEB-16 19:47:00 to 24-FEB-16 19:47:00 (EST-5)
Magnitude: 45.00 MG
Property damage: 0.00K
Reported by: ASOS

A 52 MPH thunderstorm wind gust was measured at Reading Regional Airport.

Strong Wind in EASTERN MONTGOMERY, PENNSYLVANIA
From 24-FEB-16 20:15:00 to 24-FEB-16 20:15:00 (EST-5)
Magnitude: 42.00 EG
Property damage: 0.00K
Reported by: Fire Department/Rescue

Trees down in West Norriton.

Heavy Rain in MONTGOMERY, PENNSYLVANIA
From 24-FEB-16 20:50:00 to 24-FEB-16 20:50:00 (EST-5)
Location: GILBERTSVILLE
Reported by: Trained Spotter

Torrential downpours with thunderstorms produced a measured 2.06 inches of rain in Gilbertsville.Many roads were flooded in Abington Twp. Four people were trapped in a car in Pottstown at the intersection of High and Manatawny streets.

Strong Wind in PHILADELPHIA, PENNSYLVANIA
From 24-FEB-16 21:34:00 to 24-FEB-16 21:34:00 (EST-5)
Magnitude: 41.00 MG
Property damage: 0.00K
Reported by: ASOS

A thunderstorm wind gust of 47 MPH was measured at Philadelphia International Airport.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 24-FEB-16 21:45:00 to 24-FEB-16 21:45:00 (EST-5)
Location: CHELTENHAM
Magnitude: 50.00 EG
Property damage: 0.00K
Reported by: Broadcast Media

A thunderstorm wind gust toppled a large tree onto the roof of a home along the 8200 block of New 2nd Street in Cheltenham.

Strong Wind in PHILADELPHIA, PENNSYLVANIA
From 24-FEB-16 22:54:00 to 24-FEB-16 22:54:00 (EST-5)
Magnitude: 41.00 MG
Property damage: 0.00K
Reported by: ASOS

A thunderstorm wind gust of 47 MPH was measured at Northeast Philadelphia Airport.

Flash Flood in BERKS, PENNSYLVANIA
From 24-FEB-16 21:30:00 to 25-FEB-16 01:00:00 (EST-5)
Location: MERTZTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Three Feet of water covered parts of State Street in Mertztown.  Water Rescues were necessary.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 24-FEB-16 21:34:00 to 24-FEB-16 21:34:00 (EST-5)
Location: CRESCENTVILLE
Magnitude: 43.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A sign was knocked over at a Burger King on Rising Sun Ave and Van Kirk Street.

Flood in CHESTER, PENNSYLVANIA
From 24-FEB-16 21:30:00 to 25-FEB-16 03:00:00 (EST-5)
Location: WAWASET
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Video of Brandywine flooding near route 842 in West Chester.

Strong Wind in NORTHAMPTON, PENNSYLVANIA
From 24-FEB-16 21:00:00 to 24-FEB-16 21:00:00 (EST-5)
Magnitude: 43.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

Part of a building collapsed at 323 Northhampton Street in Easton. This building was already partly deconstructed and did not meet local safety rules.

Flash Flood in NORTHAMPTON, PENNSYLVANIA
From 24-FEB-16 21:40:00 to 25-FEB-16 02:00:00 (EST-5)
Location: BRODHEAD
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Major flooding was reported on several roadways in and near downtown Bethlehem.  The southbound side of Pennsylvania Route 378 was closed between 3rd Avenue and 8th Avenue.  Vehicles were stranded on Route 378. A basement was flooded on the 1600 Broadway along with water rescues at 33rd and Lehigh streets. Motorists were also stranded due to flood waters in Lower Macungie twp and in Allentown.

Flash Flood in NORTHAMPTON, PENNSYLVANIA
From 24-FEB-16 21:45:00 to 25-FEB-16 02:00:00 (EST-5)
Location: STOCKERTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water rose quickly from heavy rain and flowed over several roadways in Bushkill Township.

Flash Flood in PHILADELPHIA, PENNSYLVANIA
From 24-FEB-16 22:40:00 to 25-FEB-16 02:00:00 (EST-5)
Location: TORRESDALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Frankford Creek reached its flood stage of 7 feet at 2240EST.  The Pennypack Creek reached its flood stage of 7 feet at 2320EST.  Numerous roadways were reported flooded from urban runoff. Interstate 76 was closed between Girard and Montgomery drive exits along with part of Lincoln Drive. Numerous reports were sent into Philadelphia police for water rescue requests. Lincoln Drive in Fairmount Park was also closed due to flooding.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 24-FEB-16 21:32:00 to 24-FEB-16 21:32:00 (EST-5)
Location: OVERBROOK
Magnitude: 50.00 EG
Reported by: Broadcast Media

A thunderstorm wind gust knocked a tree onto a house on north Wanamaker Street near Woodcrest Avenue.