The combination of an unseasonably hot and humid air mass, an approaching cold front and strong winds aloft caused a squall line of severe thunderstorms to move through southeast Pennsylvania during the late afternoon and early evening of the 23rd. Estimated wind gusts as high as around 85 mph knocked down hundreds and hundreds of trees and caused some structural damage to homes and vehicles, mainly from fallen trees. Four people were injured in Philadelphia.  Hardest hit were Philadelphia, Chester and in particular central and western Delaware County.  Delaware County declared a state of emergency and suffered an estimated five million dollars in property damage. Five people were injured. While there were multiple reports of funnel clouds, no confirmed tornadoes occurred. Numerous homes and vehicles were damaged, mainly by fallen trees. Many roads were impassable through the next day because of downed trees. SEPTA had to suspend all of its commuter regional rail service on the 23rd in the Philadelphia Metropolitan area because of debris on the tracks and downed wires. Full service was back on the 25th. Amtrak suspended both Northeast Corridor Service between Philadelphia and Washington D.C. and Keystone service between Philadelphia and Harrisburg. That service was restored on the 24th. PECO Energy reported about 250,000 of its customers lost power in southeastern Pennsylvania: close to 100,000 in Delaware County, close 75,000 in Chester County and nearly 50,000 within Philadelphia. Mutual assistance repair crews from Ohio, Kentucky, Maryland, West Virginia and New York helped with repairs. At 6 a.m. EDT on the 24th, about 161,000 customers (half in Delaware County) were still without power. That number dropped to 121,000 on the evening of the 24th, 50,000 on the 25th and 16,000 on the 26th. Full restoration occurred on the 28th. In Chester County, Verizon Wireless cell phone service was also lost on the 23rd and the 24th. Commuters were stuck on a train after power was lost on the 23rd. County courts remained closed on the 24th. In Delaware County,  PPL Park was used to distribute ice, cell phone recharge and showers. County offices re-opened on the 25th.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 23-JUN-15 15:40:00 to 23-JUN-15 15:40:00 (EST-5)
Location: ALLEGHENYVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A few trees were knocked down by a severe thunderstorm in Brecknock Township.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:45:00 to 23-JUN-15 16:45:00 (EST-5)
Location: VILLAGE GREEN
Magnitude: 74.00 EG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

An extremely powerful macroburst associated with a severe thunderstorm cut a swath of wind damage across the eastern side of Aston Township to the east of Concord Road. Peak wind gusts were estimated to reach 85 mph. Shingles and siding was ripped from homes as well as numerous homes that were struck by fallen trees. About fifteen homes were condemned in the township. Wind damage from the macroburst continued southeast through Chester City.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 23-JUN-15 13:20:00 to 23-JUN-15 13:20:00 (EST-5)
Location: SCOT RUN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm knocked down a couple of trees along Sullivan Trail in Pocono Township.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 23-JUN-15 13:22:00 to 23-JUN-15 13:22:00 (EST-5)
Location: MT POCONO
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm knocked down a couple of trees and wires in Paradise Crossing within Paradise Township.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 23-JUN-15 13:25:00 to 23-JUN-15 13:25:00 (EST-5)
Location: HENRYVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm knocked down a couple of trees in Price Township. One tree fell across and blocked Pennsylvania State Route 447 near the Alpine Mountain Resort.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 23-JUN-15 15:15:00 to 23-JUN-15 15:15:00 (EST-5)
Location: STRAUSSTOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm knocked down several trees in Upper Tulpehocken Township.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 23-JUN-15 15:12:00 to 23-JUN-15 15:12:00 (EST-5)
Location: STRAUSSTOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm knocked down several trees and wires in Strausstown and caused multiple outages in the downtown area.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 23-JUN-15 15:25:00 to 23-JUN-15 15:25:00 (EST-5)
Location: CENTERPORT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm knocked down a few trees in Centre Township.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 23-JUN-15 16:13:00 to 23-JUN-15 16:13:00 (EST-5)
Location: SUPLEE
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm knocked down trees in multiple areas withing Honey Brook Borough.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 23-JUN-15 16:30:00 to 23-JUN-15 16:30:00 (EST-5)
Location: ROMANSVILLE
Magnitude: 54.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm knocked down trees in multiple areas within West Bradford Township.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 23-JUN-15 16:00:00 to 23-JUN-15 16:00:00 (EST-5)
Location: ALLEGHENYVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A second severe thunderstorm knocked down more trees in Brecknock Township.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 23-JUN-15 16:25:00 to 23-JUN-15 16:25:00 (EST-5)
Location: DOWNINGTOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down a few trees in Downingtown Borough.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 23-JUN-15 16:28:00 to 23-JUN-15 16:28:00 (EST-5)
Location: OXFORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm knocked down a couple of trees in Oxford Borough.

Lightning in MONTGOMERY, PENNSYLVANIA
From 23-JUN-15 16:35:00 to 23-JUN-15 16:35:00 (EST-5)
Location: AUDUBON
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A lightning strike destroyed the chimney of a Lower Providence Township home.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 23-JUN-15 16:35:00 to 23-JUN-15 16:35:00 (EST-5)
Location: YERKES
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm knocked down numerous trees and wires in Lower Providence Township.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 23-JUN-15 16:37:00 to 23-JUN-15 16:37:00 (EST-5)
Location: ABRAMS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A Skywarn Spotter estimated wind gusts of 70 mph as a severe thunderstorm moved through King of Prussia (Upper Merion Township).  Numerous trees were knocked down within the township.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 23-JUN-15 16:50:00 to 23-JUN-15 16:50:00 (EST-5)
Location: ROXBOROUGH
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm knocked down a couple of trees and wires in the Roxborough section of Philadelphia.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 23-JUN-15 16:40:00 to 23-JUN-15 16:40:00 (EST-5)
Location: MT ZION
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm knocked down several trees in Stroud Township.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:43:00 to 23-JUN-15 16:43:00 (EST-5)
Location: THORNTON
Magnitude: 56.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down several trees in Concord Township. One large downed tree damaged a home in the Glen Mills section of the township.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:48:00 to 23-JUN-15 16:48:00 (EST-5)
Location: DREXEL PLAZA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm knocked down several trees in Drexel Hill (Upper Darby Township). One fell across School Lane.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:50:00 to 23-JUN-15 16:50:00 (EST-5)
Location: CHESTER
Magnitude: 56.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm knocked down over 100 trees across Upland Borough and numerous roadways were closed and blocked by fallen trees.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:50:00 to 23-JUN-15 16:50:00 (EST-5)
Location: BROOKHAVEN
Magnitude: 65.00 EG
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Newspaper

The Borough of Brookhaven was also hit very hard by the squall line of severe thunderstorms. Dozens and dozens of trees were knocked down across the borough and the entire borough lost power.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:42:00 to 23-JUN-15 16:42:00 (EST-5)
Location: CHADDS FORD
Magnitude: 52.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down numerous trees in Chadds Ford Township. Numerous roadways were closed.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:46:00 to 23-JUN-15 16:46:00 (EST-5)
Location: MOYLAN ROSE VLY
Magnitude: 56.00 EG
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down numerous trees and wires in Middletown Township. It was described as one of the harder hit locations within Delaware County.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:44:00 to 23-JUN-15 16:44:00 (EST-5)
Location: CHESTER HGTS
Magnitude: 56.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down numerous trees and wires in Chester Heights Borough. Both houses and vehicles were damaged by the fallen trees.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:47:00 to 23-JUN-15 16:47:00 (EST-5)
Location: SANDY BANK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm forced the closure Southbound U.S. Route 1 between the Interstate 476 exit in Marple Township and the State Road exit in Upper Providence Township because of downed trees. The roadway remained closed into the 24th.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 23-JUN-15 17:00:00 to 23-JUN-15 17:00:00 (EST-5)
Location: CRESCENTVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down a couple of trees and wires in the Feltonville section of Philadelphia. One woman suffered a foot injury.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 23-JUN-15 16:59:00 to 23-JUN-15 16:59:00 (EST-5)
Location: CRESCENTVILLE
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down a couple of trees along Adams Avenue in Philadelphia. One downed tree damaged a gas main. No injuries or additional damage was reported.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 23-JUN-15 17:08:00 to 23-JUN-15 17:08:00 (EST-5)
Location: CRESCENTVILLE
Magnitude: 52.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down a few trees onto homes along Sylvester Street in Philadelphia.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 23-JUN-15 17:05:00 to 23-JUN-15 17:05:00 (EST-5)
Location: PHILADELPHIA
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A severe thunderstorm knocked down a house under construction on East Allen Street and injured four workers.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 23-JUN-15 17:04:00 to 23-JUN-15 17:04:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A 72 mph wind gust was measured during a severe thunderstorm at the Philadelphia International Airport. It was the fourth highest wind gust ever recorded in Philadelphia.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 17:00:00 to 23-JUN-15 17:00:00 (EST-5)
Location: NORWOOD
Magnitude: 62.00 MG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A Skywarn Spotter measured a wind gust of 71 mph in Norwood Borough during a severe thunderstorm.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:51:00 to 23-JUN-15 16:51:00 (EST-5)
Location: CHESTER
Magnitude: 65.00 EG
Property damage: 2.50M
Crop damage: 0.00K
Reported by: Newspaper

Chester City was also hard hit by the powerful macroburst associated with the line of severe thunderstorms. About twenty homes and buildings were condemned because of wind damage including fallen trees.  Buildings along the Avenue Of The States as well as trees within city parks were particularly hard hit. A tractor-trailer along Interstate 95 was overturned by the severe thunderstorm. the driver was not injured. Wind damage in the city was estimated at 2.5 million dollars.

Funnel Cloud in DELAWARE, PENNSYLVANIA
From 23-JUN-15 16:51:00 to 23-JUN-15 16:51:00 (EST-5)
Location: TWIN OAKS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A Skywarn Spotter saw a funnel cloud over Chester Township, but the circulation did not make it to the ground.

Funnel Cloud in PHILADELPHIA, PENNSYLVANIA
From 23-JUN-15 17:01:00 to 23-JUN-15 17:01:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A funnel cloud was spotted near Philadelphia International Airport, but the circulation did not make it to the ground.

Funnel Cloud in MONTGOMERY, PENNSYLVANIA
From 23-JUN-15 17:00:00 to 23-JUN-15 17:00:00 (EST-5)
Location: JENKINTOWN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A Skywarn Spotter saw a funnel cloud over Jenkintown Borough, but the circulation did not make it to the ground.