Clusters of showers and isolated thunderstorms developed on the southwest periphery of broad cyclonic (counter-clockwise) flow aloft associated with a slow-moving upper low over New England. Despite limited instability, strong mid-level winds and steep lapse rates promoted wind damage within stronger line and bowing segments as they progressed from northwest to southeast across central Pennsylvania.

Thunderstorm Wind in LEBANON, PENNSYLVANIA
From 03-JUN-12 17:05:00 to 03-JUN-12 17:05:00 (EST-5)
Location: SAND HILL
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds estimated near 60 mph knocked down a few large trees near Lebanon.

Thunderstorm Wind in LEBANON, PENNSYLVANIA
From 03-JUN-12 17:07:00 to 03-JUN-12 17:07:00 (EST-5)
Location: LEBANON
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 Lebanon.

Thunderstorm Wind in ELK, PENNSYLVANIA
From 03-JUN-12 17:10:00 to 03-JUN-12 17:10:00 (EST-5)
Location: HALLTON
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 limbs in Millstone Township near SR 949 along the Jefferson County line.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 03-JUN-12 17:10:00 to 03-JUN-12 17:10:00 (EST-5)
Location: NEWVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm outflow estimated near 60 mph knocked down utility wires and large tree limbs near Elizabethtown.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 03-JUN-12 17:15:00 to 03-JUN-12 17:15:00 (EST-5)
Location: YORK
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph blew roofs off of two residential homes in York.

Thunderstorm Wind in MCKEAN, PENNSYLVANIA
From 03-JUN-12 17:19:00 to 03-JUN-12 17:19:00 (EST-5)
Location: CUSTER CITY
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 along SR 770 southwest of Bradford.

Thunderstorm Wind in CENTRE, PENNSYLVANIA
From 03-JUN-12 18:35:00 to 03-JUN-12 18:35:00 (EST-5)
Location: STATE COLLEGE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires along Westerly Parkway in State College.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 03-JUN-12 17:50:00 to 03-JUN-12 17:50:00 (EST-5)
Location: QUARRYVILLE
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 Quarryville.

Thunderstorm Wind in MIFFLIN, PENNSYLVANIA
From 03-JUN-12 18:50:00 to 03-JUN-12 18:50:00 (EST-5)
Location: MILROY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph blew a roof off of a residential home in Milroy. The damaging winds also knocked down several trees.

Thunderstorm Wind in MIFFLIN, PENNSYLVANIA
From 03-JUN-12 19:00:00 to 03-JUN-12 19:00:00 (EST-5)
Location: LEWISTOWN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Lewistown. The emergency manager reported multiple locations with trees and wires down in the county.