A cool pool aloft associated with a large upper level low pressure system located off of the New England coast combined with strong mid-June sunshine to create a favorable environment for thunderstorm development during the afternoon and evening hours on June 12, 2007. A compact upper air disturbance aided in providing large scale ascent as it rotated around the periphery of the upper level vortex . The storm motion was from the northeast to the southwest, which is unusual for summertime convection in Central PA.

Thunderstorm Wind in LEBANON, PENNSYLVANIA
From 12-JUN-07 15:15:00 to 12-JUN-07 15:15:00 (EST-5)
Location: EAST HANOVER
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lebanon county Emergency Manager reported trees down in Harper Tavern.

Thunderstorm Wind in PERRY, PENNSYLVANIA
From 12-JUN-07 16:45:00 to 12-JUN-07 16:45:00 (EST-5)
Location: NEWPORT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported numerous trees down.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 12-JUN-07 17:15:00 to 12-JUN-07 17:15:00 (EST-5)
Location: LIGHT STREET
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported trees down 2 miles south-southwest of Orangeville.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 12-JUN-07 18:15:00 to 12-JUN-07 18:15:00 (EST-5)
Location: WILLIAMSON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported trees down 4 miles north-northwest of Greencastle.

Thunderstorm Wind in BLAIR, PENNSYLVANIA
From 12-JUN-07 20:32:00 to 12-JUN-07 20:32:00 (EST-5)
Location: BELLWOOD
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported trees down in Bellwood.

Hail in LYCOMING, PENNSYLVANIA
From 12-JUN-07 17:37:00 to 12-JUN-07 17:37:00 (EST-5)
Location: HUGHESVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter measured quarter-sized hail in Hughesville.

Thunderstorm Wind in CAMBRIA, PENNSYLVANIA
From 12-JUN-07 20:55:00 to 12-JUN-07 20:55:00 (EST-5)
Location: PORTAGE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Cambria county Emergency Manager reported trees and wires down near Portage as well as other parts of Cambria county.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 12-JUN-07 17:05:00 to 12-JUN-07 17:05:00 (EST-5)
Location: BENTON
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported trees down in Benton.

Thunderstorm Wind in BLAIR, PENNSYLVANIA
From 12-JUN-07 20:25:00 to 12-JUN-07 20:25:00 (EST-5)
Location: BELLWOOD
Magnitude: 53.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter measured a 61 mph wind gust in Bellwood.

Thunderstorm Wind in NORTHUMBERLAND, PENNSYLVANIA
From 12-JUN-07 16:08:00 to 12-JUN-07 16:08:00 (EST-5)
Location: HICKORY CORNERS
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law Enforcement reported trees down on wires 4 miles south of Herndon.