Severe thunderstorms caused considerable tree damage and two injuries during the afternoon of the 24th across southeastern Pennsylvania. PECO Energy reported about 215,000 customers lost power, the 11th worst outage in company history. Chester and Delaware Counties were hit the hardest. as of 1201 a.m. EDT on the 25th, 190,000 customers were without power. That number dropped to 152,000 at Noon EDT on the 25th and 75,000 at 11 p.m. EDT on the 25th. Power was not fully restored until the 28th. The utility had to replace 140 poles, 140 pole top transformers, 900 pole cross arms and twenty miles of electrical cable. Regional rail lines were affected as downed trees blocked some routes. SEPTA delayed or suspended train service south of Philadelphia. All train service was not fully restored until the evening of the 25th. Downed trees also blocked lanes of the Schuylkill Expressway in Philadelphia and the Pennsylvania Turnpike in Chester County. Philadelphia International's 75 mph wind gust was the third highest on record.

Hail in PHILADELPHIA, PENNSYLVANIA
From 24-JUN-10 14:30:00 to 24-JUN-10 14:30:00 (EST-5)
Location: PHILADELPHIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Quarter size hail fell in South Philadelphia.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 24-JUN-10 14:41:00 to 24-JUN-10 14:50:00 (EST-5)
Location: NOTTINGHAM
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

The second severe thunderstorm of the day to affect Chester County downed additional trees, tree limbs and wires in the southwestern part of the county.

Lightning in PHILADELPHIA, PENNSYLVANIA
From 24-JUN-10 14:25:00 to 24-JUN-10 14:25:00 (EST-5)
Location: WEST PHILADELPHIA
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Newspaper

Lightning struck a famous Yellowwood tree from the 1790s within Bartram's Garden. The Garden was closed on the 25th because of the damage.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 24-JUN-10 14:31:00 to 24-JUN-10 14:31:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

A severe thunderstorm produced a wind gust of 65 knots or 75 mph at Philadelphia International Airport. This was the third highest gust ever recorded at the airport.

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 24-JUN-10 14:25:00 to 24-JUN-10 14:35:00 (EST-5)
Location: OVERBROOK
Magnitude: 60.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A severe thunderstorm knocked down numerous trees in the southern half of Philadelphia. There were 184 calls of downed trees with the Southwest Philadelphia and Cobbs Creek areas hit the hardest. A few streets were blocked by downed trees. Downed trees also blocked some of the lanes on the Schuylkill Expressway. Part of the roof was torn from the New Light Beulah Baptist Church on Bainbridge Street and crushed two vehicles.  Downed trees crushed a fence at Saint John Neumann Place in South Philadelphia. The awning of a banquet hall on West Oxford Street collapsed. The severe thunderstorm also lifted the tarp at Citizen Bank Baseball Park into the air. Trolley Wires were knocked down in the University City area.

Thunderstorm Wind in CHESTER, PENNSYLVANIA
From 24-JUN-10 13:45:00 to 24-JUN-10 14:10:00 (EST-5)
Location: SUPLEE
Magnitude: 61.00 EG
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced a swath of wind damage from downed trees, tree limbs to downed wires across the northeast half of Chester County. Many roadways were blocked and vehicles damaged by fallen trees. Trees also fell onto the Pennsylvania Turnpike. Hardest hit were Uwchlan, Wallace, West Vincent and Willistown Townships, but wind damage was also reported in North Coventry, Phoenixville, Charlestown, Downingtown, West Whiteland, West Goshen, East Goshen, West Chester, Westtown, Pocopson. Kenneth and Kenneth Square. Nearly 80,000 homes and businesses lost power and it took until June 28th for power to be fully restored. In West Chester, downed trees blocked the entrance to a hospital. Downed trees also damaged a home and garage and crushed a barn. In North Coventry, a downed tree punched a hole in the roof of a home.

Hail in DELAWARE, PENNSYLVANIA
From 24-JUN-10 14:20:00 to 24-JUN-10 14:30:00 (EST-5)
Location: OAKMONT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The same severe thunderstorm produced a swath of large hail (quarter to golf ball size) across eastern Delaware County from Haverford Township south through Yeadon Borough. The largest hail (golf ball size) was reported in Yeadon and ping pong ball size hail (1.5 inches in diameter) was reported in Drexel Hill in Upper Darby Township.

Lightning in CHESTER, PENNSYLVANIA
From 24-JUN-10 13:55:00 to 24-JUN-10 13:55:00 (EST-5)
Location: EAGLE
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike and the ensuing fire destroyed two homes on Gramercy Lane in Uwchlan Township. No injuries were reported.

Lightning in BUCKS, PENNSYLVANIA
From 24-JUN-10 14:30:00 to 24-JUN-10 14:30:00 (EST-5)
Location: LEVITTOWN
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike created a foot wide hole in the roof of a house on Jasmine Road  in Lower Southampton Township. It ignited a wire within the attic and started a fire. Six different municipal responders assisted with the fire which was contained within 20 minutes.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 24-JUN-10 13:45:00 to 24-JUN-10 13:45:00 (EST-5)
Location: PLOWVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

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

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 24-JUN-10 14:10:00 to 24-JUN-10 14:25:00 (EST-5)
Location: FLORIDA PARK
Magnitude: 66.00 MG
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Trained Spotter

Severe thunderstorms produced a swath of wind damage across the northeast half of Delaware County. Numerous trees and wires were knocked down. There were four times the normal number of calls into the county's 911 center. Because of the nearly 100,000 power outages in the county, dry ice was distributed in Havertown, Newtown Square and Springfield. A woman and her daughter were injured when a tree fell onto their vehicle in Lansdowne. A 300-year-old tree was knocked down onto Greenwood Avenue in the borough. Most of the borough lost power. In Upper Darby Township, the roof from the Today's Child Learning Center blew onto the SEPTA Regional Rail lines tracks near the Primos Station. The roof of another home was nearly torn away.  In all several homes and a park were damaged by fallen trees along Windermere Avenue. Another downed tree fell onto a moving vehicle, but the five occupants were not hurt. Firefighters rescued a 10-year-old boy with an iron lung. A Skywarn Spotter measured a wind gust of 76 mph. Because 15,000 residents lost power, an air conditioned comfort center was available at the Upper Darby High School Cafeteria.  In Haverford Township, a 30,000 volt transmission wire was knocked down and create a crater on a roadway. In Marple Township, windows were shattered and siding was stripped around the Lawrence Park Industrial Center. A large sign above the Five Guys Shopping Center was cracked. In Springfield Township around Dutton Circle and Valley View Road, windows and sidings were also damaged, roof shingles were also torn and at least one porch and vehicle were damaged by downed trees. The SEPTA Media/Elwyn line did not resume regional rail service until the evening of the 25th.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 24-JUN-10 14:20:00 to 24-JUN-10 14:20:00 (EST-5)
Location: ROSEMOUNT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A severe thunderstorm tore down trees along Montgomery Avenue in Lower Merion Township.

Lightning in CHESTER, PENNSYLVANIA
From 24-JUN-10 13:45:00 to 24-JUN-10 13:45:00 (EST-5)
Location: HONEY BROOK
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Newspaper

A lightning strike set a barn on fire in Honey Brook.