Cold air aloft coupled with daytime heating helped develop strong to locally severe thunderstorms across eastern Pennsylvania during the afternoon of the 12th.

Hail in BUCKS, PENNSYLVANIA
From 12-JUN-07 13:48:00 to 12-JUN-07 13:48:00 (EST-5)
Location: LANGHORNE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotters reported penny to nickel size hail from a second severe thunderstorm in Feasterville and Trevose in Lower Southampton Township and in Langhorne Township.

Hail in MONTGOMERY, PENNSYLVANIA
From 12-JUN-07 14:30:00 to 12-JUN-07 14:30:00 (EST-5)
Location: FT WASHINGTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A second severe thunderstorm of the day dropped penny size hail in Fort Washington (Along the Whitemarsh and Upper Dublin Township lines).

Hail in BERKS, PENNSYLVANIA
From 12-JUN-07 12:59:00 to 12-JUN-07 12:59:00 (EST-5)
Location: MORGANTOWN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm also dropped penny size hail in Morgantown (Caernarvon Township).

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 12-JUN-07 13:32:00 to 12-JUN-07 13:32:00 (EST-5)
Location: WOODBOURNE
Magnitude: 56.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A severe thunderstorm knocked down several trees and wires across lower Bucks County across Middletown, Langhorne and Lower Southampton Townships. In Lower Southampton Township, one tree crashed through the roof and into the master bedroom of a home. A grandmother pulled her grandson off the bed just as the tree came crashing through. The grandson just suffered a cut on his hand. In Middletown Township, healthy trees were snapped and struck three moving vehicles on Woodburne Road (Pennsylvania State Route 213). No injuries were reported. A skylight and several windows were broken at nearby Oxford Valley Mall. Several roads in the township were closed because of downed trees. Several mature trees were also snapped in Langhorne Township. Penny to nickel size hail also fell from the severe thunderstorm in Middletown and Langhorne. About 12,000 homes and businesses lost power in Bucks County.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 12-JUN-07 12:20:00 to 12-JUN-07 12:20:00 (EST-5)
Location: LAURELDALE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm tore down a few power lines and trees in Laureldale.

Hail in BERKS, PENNSYLVANIA
From 12-JUN-07 12:43:00 to 12-JUN-07 12:43:00 (EST-5)
Location: ST LAWRENCE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm dropped penny size hail in Exeter Township.

Hail in MONTGOMERY, PENNSYLVANIA
From 12-JUN-07 13:10:00 to 12-JUN-07 13:10:00 (EST-5)
Location: HORSHAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A SKYWARN Spotter reported to nickel to quarter size hail in Horsham Township.

Hail in MONTGOMERY, PENNSYLVANIA
From 12-JUN-07 13:20:00 to 12-JUN-07 13:23:00 (EST-5)
Location: FT WASHINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Penny to quarter size hail was reported by SKYWARN Spotters in Fort Washington (Whitemarsh Township) and Glenside (Abington Township).

Hail in BUCKS, PENNSYLVANIA
From 12-JUN-07 13:32:00 to 12-JUN-07 13:32:00 (EST-5)
Location: ANDALUSIA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PHILADELPHIA, PENNSYLVANIA
From 12-JUN-07 14:11:00 to 12-JUN-07 14:23:00 (EST-5)
Location: (PHL)PHILADELPHIA IN
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm knocked down around three dozen trees within the city and injured four people. A downed tree on West Oak Lane fell onto a vehicle and injured three people. A 55-year-old man was injured when his vehicle was crushed by a tree on Limekiln Pike. Downed wires in the Northern Liberty section of the city set a vehicle on fire. Bad weather in Philadelphia and other cities attempting to fly to and from the city caused hundreds of cancellations. About 750 people were forced to spend the night at the airport. PECO Energy reported about 30,000 homes and businesses in its southeastern Pennsylvania service area lost power because of the thunderstorms.

Thunderstorm Wind in BUCKS, PENNSYLVANIA
From 12-JUN-07 15:42:00 to 12-JUN-07 15:42:00 (EST-5)
Location: LANGHORNE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Another severe thunderstorm knocked down trees and wires in Langhorne Township. The combined severe thunderstorms caused about 12,000 homes and businesses to lose power throughout Bucks County on the 12th.