A slow-moving cold front encountered a warm...moist and unstable airmass over east-central Pennsylvania during the early afternoon. Thunderstorms developed rapidly and produced large hail ranging from nickel to baseball size and damaging winds. Large hail covered the ground in several locations. In addition, hail ripped siding off of homes, put holes in slate roofs, dented hundreds of cars and broke numerous windshields.  Lycoming county emergency management estimated between $300,000 to $400,000 dollars in hail damage. Although some storms exhibited strong rotational signatures and funnel clouds were sighted, no tornadoes were confirmed.

Hail in COLUMBIA, PENNSYLVANIA
From 17-AUG-07 12:43:00 to 17-AUG-07 12:43:00 (EST-5)
Location: MILLVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported nickel sized hail in Millville.

Hail in LANCASTER, PENNSYLVANIA
From 17-AUG-07 12:30:00 to 17-AUG-07 12:30:00 (EST-5)
Location: HAMILTON PARK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lancaster county emergency management reported nickel sized hail in Lancaster.

Hail in COLUMBIA, PENNSYLVANIA
From 17-AUG-07 13:16:00 to 17-AUG-07 13:16:00 (EST-5)
Location: BLOOMSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported quarter sized hail in Bloomsburg.

Hail in LYCOMING, PENNSYLVANIA
From 17-AUG-07 12:00:00 to 17-AUG-07 12:00:00 (EST-5)
Location: GARDEN VIEW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported nickel sized hail just west of Williamsport.

Hail in SCHUYLKILL, PENNSYLVANIA
From 17-AUG-07 13:35:00 to 17-AUG-07 13:35:00 (EST-5)
Location: MC ADOO
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Schuylkill county law enforcement reported a second round of golf-ball sized hail after a 15 to 20 minute break.

Hail in LYCOMING, PENNSYLVANIA
From 17-AUG-07 12:08:00 to 17-AUG-07 12:08:00 (EST-5)
Location: MONTGOMERY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported hail the size of a ping-pong ball (1.5 inches) in Montgomery.

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

Trained spotter reported quarter sized hail in Williamsport.

Hail in LYCOMING, PENNSYLVANIA
From 17-AUG-07 12:04:00 to 17-AUG-07 12:04:00 (EST-5)
Location: LOYALSOCKVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported nickel sized hail in Loyalsockville.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 17-AUG-07 12:35:00 to 17-AUG-07 12:35:00 (EST-5)
Location: HAMILTON PARK
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lancaster county emergency management reported trees down in County Park. This resulted in the closure of Rockford and Williamson roads.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 17-AUG-07 12:40:00 to 17-AUG-07 12:40:00 (EST-5)
Location: MILLVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Columbia county emergency management reported multiple trees and wires down on Rod and Gun Club road approximately 1-2 miles west of Millville.

Thunderstorm Wind in SCHUYLKILL, PENNSYLVANIA
From 17-AUG-07 13:00:00 to 17-AUG-07 13:00:00 (EST-5)
Location: RINGTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported roof blown off shed in Ringtown.

Hail in LYCOMING, PENNSYLVANIA
From 17-AUG-07 12:20:00 to 17-AUG-07 12:20:00 (EST-5)
Location: MUNCY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported nickel sized hail covering the ground in Pennsdale.

Hail in LANCASTER, PENNSYLVANIA
From 17-AUG-07 12:17:00 to 17-AUG-07 12:17:00 (EST-5)
Location: SALUNGA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported nickel sized hail in Landisville.

Hail in NORTHUMBERLAND, PENNSYLVANIA
From 17-AUG-07 12:25:00 to 17-AUG-07 12:25:00 (EST-5)
Location: TURBOTVILLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported half-dollar sized hail in Turbotville.

Hail in MONTOUR, PENNSYLVANIA
From 17-AUG-07 12:30:00 to 17-AUG-07 12:30:00 (EST-5)
Location: EXCHANGE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public measured hail the size of a ping-pong ball. The hail had been on the ground for 30 minutes before measurement.

Hail in SCHUYLKILL, PENNSYLVANIA
From 17-AUG-07 13:05:00 to 17-AUG-07 13:05:00 (EST-5)
Location: MC ADOO
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Schuylkill county law enforcement reported golf-ball sized hail in McAdoo.

Hail in LYCOMING, PENNSYLVANIA
From 17-AUG-07 12:22:00 to 17-AUG-07 12:22:00 (EST-5)
Location: MUNCY
Magnitude: 1.75 
Property damage: 350.00K
Crop damage: 0.00K
Reported by: Public

Public reported golf ball to baseball sized hail in Muncy (report relayed through trained storm spotter).