A hot and humid air mass and a lee side trough helped trigger a powerful squall line of strong to severe thunderstorms that moved through all of Eastern Pennsylvania during the evening of the 8th. About 400,000 homes and businesses lost power in central and eastern Pennsylvania.  PECO Energy reported 260,000 of its customers lost power in southeastern Pennsylvania as this line moved through. About 100,000 customers were without power on the morning of the 9th and 40,000 on the afternoon of the 9th. Chester County had about half of the remaining outages. It took until the afternoon of the 11th to have power fully restored. Restoration crews from a dozen states assisted. Metropolitan Edison reported about 61,000 of its Pennsylvania customers lost power and Pennsylvania Power and Light reported about 75,000 of its Pennsylvania Customers (28,000 on the morning of the 9th) also lost power. Power was restored to all of their customers by the night of the 10th. In addition, about 7,000 homes and businesses lost power in Berks County. Preceding this line, an isolated severe thunderstorm affected Bucks County during the afternoon of the 8th.
The downed trees and power lines also caused commuting problems. Numerous roads were blocked by fallen trees. Amtrak suspended its Keystone Line between Philadelphia and Harrisburg because of downed trees. In southeast Pennsylvania, SEPTA Regional Commuter Rail Service had to suspend service along Paoli-Thorndale, Fox Chase, Airport and Chestnut Hill Lines because of tree and line problems. Some SEPTA Trolly service was also suspended in Delaware County.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 08-JUL-14 18:45:00 to 08-JUL-14 18:45:00 (EST-5)
Location: WERNERSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A squall line severe thunderstorm knocked down a large tree and several large tree limbs in Wernersville Borough.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 08-JUL-14 19:28:00 to 08-JUL-14 19:28:00 (EST-5)
Location: MEDIA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down large tree limbs and wires in Media Borough. The downed wires caused shuttle buses to be used on the SEPTA 101 trolley line between Media and Scenic Road.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 08-JUL-14 19:25:00 to 08-JUL-14 19:35:00 (EST-5)
Location: LYNNPORT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A squall line of severe thunderstorms knocked down numerous trees and wires mainly across the northern half of Lehigh County. In North Whitehall Township, a back-up generator started a house fire. Wind gusts of 56 mph and 47 mph were measured within Allentown and at the Lehigh Valley International Airport respectively. The combination of damaging winds and lightning caused about 6,500 homes and businesses to lose power in the Lehigh Valley. It took until the night of the 10th to have power fully restored.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 08-JUL-14 19:40:00 to 08-JUL-14 19:40:00 (EST-5)
Location: EDGEMONT
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm caused significant tree damage in Lehigh Township.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 08-JUL-14 19:36:00 to 08-JUL-14 19:36:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A severe thunderstorm produced a wind gust of 59 mph at the Philadelphia International Airport at 836 p.m. EDT. The same squall line produced a wind gust of 56 mph at Northeast Philadelphia Airport at 846 p.m. EDT.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 08-JUL-14 20:02:00 to 08-JUL-14 20:02:00 (EST-5)
Location: STIER
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm caused significant tree damage in Upper Mount Bethel Township. The combination of damaging winds and lightning caused about 6,500 homes and businesses to lose power in the Lehigh Valley. It took until the night of the 10th to have power fully restored.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 08-JUL-14 18:52:00 to 08-JUL-14 18:52:00 (EST-5)
Location: WERNERSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A squall line severe thunderstorm knocked down several large tree limbs in Wyomissing.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 08-JUL-14 19:37:00 to 08-JUL-14 19:37:00 (EST-5)
Location: DANIELSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm knocked down several trees in Danielsville in Moore Township.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 08-JUL-14 19:43:00 to 08-JUL-14 19:43:00 (EST-5)
Location: BRIDESBURG
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced a wind gust of 65 mph in the Port Richmond section of Philadelphia.

Thunderstorm Wind in MONROE, PENNSYLVANIA
From 08-JUL-14 19:45:00 to 08-JUL-14 20:15:00 (EST-5)
Location: KRESGEVILLE
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

A squall line of severe thunderstorms knocked down several trees and tree limbs as it moved across Monroe County.  About 140 homes lost power. Hardest hit were Eldred Township, Stroudsburg and East Stroudsburg. In Stroudsburg, a 60 foot tall tree damaged two gravestones in the Stroudsburg Cemetery.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 08-JUL-14 19:42:00 to 08-JUL-14 19:42:00 (EST-5)
Location: BUCKINGHAM VLY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm knocked down a large oak tree in Buckingham Township.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 08-JUL-14 19:50:00 to 08-JUL-14 19:50:00 (EST-5)
Location: CORNWELLS HGTS
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm knocked down trees in Bensalem Township, one of which damaged a vehicle. Nearby Falls Township still had over 2,700 homes and businesses without power on the night of the 9th.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 08-JUL-14 19:50:00 to 08-JUL-14 19:51:00 (EST-5)
Location: GLENDON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm knocked down trees and wires along Morvale Road and Delaware Drive in Williams Township.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 08-JUL-14 19:00:00 to 08-JUL-14 19:00:00 (EST-5)
Location: GEIGERTOWN
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm tore down several trees in Robeson Township. A 10-year-old boy was injured when a tree toppled onto a building at the camp behind High Point Baptist Church on Chapel Road. The  boy was outside and was hit by one of the branches when the tree came down. He was taken to Reading Hospital with a cut to his head and a possible shoulder injury. About 7,000 Berks County residents lost power.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 08-JUL-14 19:48:00 to 08-JUL-14 19:48:00 (EST-5)
Location: COPELLA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm knocked down several trees across roadways in Bushkill Township.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 08-JUL-14 19:25:00 to 08-JUL-14 19:25:00 (EST-5)
Location: RADNOR
Magnitude: 56.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

A squall line of severe thunderstorm knocked down dozens of trees in Radnor Township. The downed trees tore down wires and fences. The township still had over 1,200 homes and businesses without power on the night of the 9th.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 08-JUL-14 18:45:00 to 08-JUL-14 19:20:00 (EST-5)
Location: GLEN ROY
Magnitude: 61.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A squall line of severe thunderstorms knocked down numerous trees as it moved through Chester County. Approximately 80,000 homes and businesses lost power with thirty roadways closed because of downed trees. Chester County had about a third (17,000) of the remaining southeast Pennsylvania outages on the afternoon of the 9th.  West Caln Township still had 5,000 homes and businesses without power that night.  Overall, the southern half of the county was hardest hit.  Downed trees damaged homes in West Fallowfield, West Caln, Penn and Easttown Townships.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 08-JUL-14 19:42:00 to 08-JUL-14 19:42:00 (EST-5)
Location: PHILMONT COUNTRY CLU
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm knocked down multiple trees and wires in Lower Moreland Township.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 08-JUL-14 15:05:00 to 08-JUL-14 15:05:00 (EST-5)
Location: FARM SCHOOL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A severe thunderstorm tore down a few trees, tree limbs and power lines in Doylestown Township. The combination of the wind and lightning caused about 3,500 homes and businesses to lose power in Doylestown Township and Borough.

Lightning in LEHIGH, PENNSYLVANIA
From 08-JUL-14 19:25:00 to 08-JUL-14 19:25:00 (EST-5)
Location: NEW TRIPOLI
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A 39-year-old man was struck and injured by lightning. He required hospitalization.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 08-JUL-14 19:53:00 to 08-JUL-14 19:53:00 (EST-5)
Location: TULLYTOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm knocked down several trees in Levittown (Middletown Township). The downed trees caused some transformers to pop.  A wind gust of 57 mph was measured at nearby Newbold Island.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 08-JUL-14 19:35:00 to 08-JUL-14 19:35:00 (EST-5)
Location: EAST LANSDOWNE
Magnitude: 52.00 MG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm snapped a large pine tree along Lansdowne Avenue onto an idling vehicle in Yeadon Borough. No one in the vehicle was injured. PECO Energy reported about 40,000 of its customers lost power in Delaware County.

Lightning in NORTHAMPTON, PENNSYLVANIA
From 08-JUL-14 19:55:00 to 08-JUL-14 19:55:00 (EST-5)
Location: EASTON
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike started a house fire on Sycamore Street. No serious injuries were reported.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 08-JUL-14 19:15:00 to 08-JUL-14 19:15:00 (EST-5)
Location: CHADDS FORD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm knocked down numerous large tree limbs in Chadds Ford Township.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 08-JUL-14 19:20:00 to 08-JUL-14 19:20:00 (EST-5)
Location: GLEN MILLS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A squall line of severe thunderstorm knocked down trees in Glen Mills.

Lightning in BUCKS, PENNSYLVANIA
From 08-JUL-14 15:10:00 to 08-JUL-14 15:10:00 (EST-5)
Location: DOYLESTOWN
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A lightning strike knocked down a pole in Doylestown. The combination of the damaging winds and lightning caused about 3,500 homes and businesses to lose power in the local area.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 08-JUL-14 19:31:00 to 08-JUL-14 19:31:00 (EST-5)
Location: NORWOOD
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A Skywarn spotter measured a wind gust of 60 mph during a severe thunderstorm in Norwood.

Lightning in NORTHAMPTON, PENNSYLVANIA
From 08-JUL-14 19:50:00 to 08-JUL-14 19:50:00 (EST-5)
Location: GLENDON
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike started a house fire in William Township on Morgan Hill Road. No serious injuries were reported.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 08-JUL-14 19:35:00 to 08-JUL-14 19:35:00 (EST-5)
Location: CHESTNUT HILL
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A severe thunderstorm snapped a large tree which fell onto and damaged a vehicle in the Mount Airy section of Philadelphia.

Lightning in NORTHAMPTON, PENNSYLVANIA
From 08-JUL-14 19:51:00 to 08-JUL-14 19:51:00 (EST-5)
Location: COFFEETOWN
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike started a second house fire in William Township on Raubsville Road. No serious injuries were reported with this fire either.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 08-JUL-14 19:30:00 to 08-JUL-14 19:30:00 (EST-5)
Location: DREXEL HILL
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

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