Pre-frontal convection developed early in the day across western Pennsylvania and produced isolated wind damage and marginally severe hail. Additional strong to severe thunderstorms formed later in the afternoon and evening across portions of central and eastern Pennsylvania. This activity became more widespread and produced multiple reports of large hail and damaging winds.

Thunderstorm Wind in HUNTINGDON, PENNSYLVANIA
From 29-MAY-12 13:05:00 to 29-MAY-12 13:05:00 (EST-5)
Location: WARRIOR RIDGE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Petersburg. A few power poles were also snapped-off.

Thunderstorm Wind in ELK, PENNSYLVANIA
From 29-MAY-12 12:30:00 to 29-MAY-12 12:30:00 (EST-5)
Location: HELEN MILLS
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Brockport.

Thunderstorm Wind in TIOGA, PENNSYLVANIA
From 29-MAY-12 12:50:00 to 29-MAY-12 12:50:00 (EST-5)
Location: OSCEOLA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Osceola.

Thunderstorm Wind in TIOGA, PENNSYLVANIA
From 29-MAY-12 13:15:00 to 29-MAY-12 13:15:00 (EST-5)
Location: TIOGA JCT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Tioga Junction.

Thunderstorm Wind in TIOGA, PENNSYLVANIA
From 29-MAY-12 13:40:00 to 29-MAY-12 13:40:00 (EST-5)
Location: MANSFIELD
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires just east of Mansfield.

Thunderstorm Wind in TIOGA, PENNSYLVANIA
From 29-MAY-12 14:27:00 to 29-MAY-12 14:27:00 (EST-5)
Location: ARNOT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Utility Company

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Blossburg.

Thunderstorm Wind in SULLIVAN, PENNSYLVANIA
From 29-MAY-12 15:15:00 to 29-MAY-12 15:15:00 (EST-5)
Location: MILLVIEW
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires along Lambert Hill Road (SR4015) near Dushore.

Thunderstorm Wind in LYCOMING, PENNSYLVANIA
From 29-MAY-12 14:25:00 to 29-MAY-12 14:25:00 (EST-5)
Location: WHITE PINE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds estimated near 60 mph knocked down several trees in Brookside.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 29-MAY-12 15:30:00 to 29-MAY-12 15:30:00 (EST-5)
Location: BLOOMSBURG
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds estimated near 60 mph knocked down trees in Bloomsburg.

Thunderstorm Wind in CUMBERLAND, PENNSYLVANIA
From 29-MAY-12 16:00:00 to 29-MAY-12 16:00:00 (EST-5)
Location: NEWVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds estimated near 60 mph knocked down trees in Newville.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 29-MAY-12 15:30:00 to 29-MAY-12 15:30:00 (EST-5)
Location: ST THOMAS
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in St. Thomas. The severe winds also caused damage to several homes near 1772 St Thomas/Eden Mill Road. Three homes suffered minor damage; one home suffered moderate damage. No injuries were reported.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 29-MAY-12 16:45:00 to 29-MAY-12 16:45:00 (EST-5)
Location: EMIGSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds estimated near 60 mph knocked down trees near John Rudy County Park.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 29-MAY-12 17:35:00 to 29-MAY-12 17:35:00 (EST-5)
Location: MILLERSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm winds estimated near 60 mph knocked down trees in Millersville.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 29-MAY-12 15:15:00 to 29-MAY-12 15:15:00 (EST-5)
Location: EDENVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds estimated near 60 mph knocked down several large trees and limbs along Mountain Brook Road and Apple Way near US30 near Edenville.

Thunderstorm Wind in CUMBERLAND, PENNSYLVANIA
From 29-MAY-12 16:05:00 to 29-MAY-12 16:05:00 (EST-5)
Location: GREASON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down several trees near Carlisle.

Thunderstorm Wind in CENTRE, PENNSYLVANIA
From 29-MAY-12 14:30:00 to 29-MAY-12 14:30:00 (EST-5)
Location: CENTRE HALL
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Centre Hall.

Flash Flood in CUMBERLAND, PENNSYLVANIA
From 29-MAY-12 17:00:00 to 29-MAY-12 19:30:00 (EST-5)
Location: SHIPPENSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A line of intense heavy thunderstorm rains caused flash flooding across much of the county. Carlisle reported 2.3 inches of rainfall in a short period of time. Flooded roads were reported in Camp Hill, Carlisle, Shippensburg and Southampton Townships.  A water rescue was reported on Hummel Avenue in Camp Hill.  Two cars were rescued from flood waters in Carlisle.

Hail in WARREN, PENNSYLVANIA
From 29-MAY-12 11:00:00 to 29-MAY-12 11:00:00 (EST-5)
Location: COLUMBUS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A spotter from the Cleveland NWS office reported 1 inch hail in Columbus. The report was relayed via NWS Cleveland.

Hail in HUNTINGDON, PENNSYLVANIA
From 29-MAY-12 13:15:00 to 29-MAY-12 13:15:00 (EST-5)
Location: HUNTINGDON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 1 inch hail in Huntingdon.

Hail in LYCOMING, PENNSYLVANIA
From 29-MAY-12 14:30:00 to 29-MAY-12 14:30:00 (EST-5)
Location: HUGHESVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported nickel-size hail in Hughesville.

Hail in FRANKLIN, PENNSYLVANIA
From 29-MAY-12 14:45:00 to 29-MAY-12 14:45:00 (EST-5)
Location: MERCERSBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported nickel-sized hail in Mercersburg.

Hail in LANCASTER, PENNSYLVANIA
From 29-MAY-12 17:35:00 to 29-MAY-12 17:35:00 (EST-5)
Location: MILLERSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in POTTER, PENNSYLVANIA
From 29-MAY-12 13:00:00 to 29-MAY-12 13:00:00 (EST-5)
Location: COUDERSPORT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Coudersport.

Thunderstorm Wind in CAMBRIA, PENNSYLVANIA
From 29-MAY-12 13:30:00 to 29-MAY-12 13:30:00 (EST-5)
Location: BROWNSTOWN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees in Westmont.