A cold front moving east from the Ohio Valley encountered a very moist and unstable airmass over central Pennsylvania, triggering numerous strong to severe thunderstorms during the afternoon and evening hours. This was the first widespread severe weather event of 2008. This event also came at the end of a four-day heat episode.
All utility companies across the Commonwealth were affected by power outages. The overall outage affected approximately 230,000 customers.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 10-JUN-08 16:35:00 to 10-JUN-08 16:45:00 (EST-5)
Location: DRY RUN
Magnitude: 61.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm winds toppled trees and snapped tree limbs along a path from north of Dry Run to northeast of Doylesburg. The winds tore part of the roof off of one barn. one truck was also hit by a falling tree. The tree and barn roof debris were all consistent with straight line winds.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 10-JUN-08 17:55:00 to 10-JUN-08 17:55:00 (EST-5)
Location: TERRE HILL
Magnitude: 52.00 EG
Property damage: 5.00K
Reported by: Emergency Manager

The Lancaster County emergency manager reported several large trees snapped off and a radio tower down. Several roofs were also blown off. Trained spotters also reported wind gusts of 60 mph near Terre Hill and numerous trees and wires down on Route 897 approximately 5 miles south of Route 322. A large tree fell onto a house causing structural damage.

Hail in LANCASTER, PENNSYLVANIA
From 10-JUN-08 18:10:00 to 10-JUN-08 18:10:00 (EST-5)
Location: GAP
Magnitude: 0.75 
Reported by: Public

Public reported penny-sized hail in Gap.

Hail in COLUMBIA, PENNSYLVANIA
From 10-JUN-08 17:50:00 to 10-JUN-08 17:50:00 (EST-5)
Location: BLOOMSBURG
Magnitude: 0.88 
Reported by: Public

Public reported nickel-sized hail in Bloomsburg.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 10-JUN-08 17:45:00 to 10-JUN-08 17:45:00 (EST-5)
Location: BLOOMSBURG
Magnitude: 50.00 EG
Reported by: Public

Public reported numerous trees down in Bloomsburg.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 10-JUN-08 16:35:00 to 10-JUN-08 16:45:00 (EST-5)
Location: DOYLESBURG
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Thunderstorm winds knocked down a swath of trees extending from about 2 miles southwest of Concord to near Concord. A portion of the roof of a barn was torn off. All tree and barn damage was consistent with straight line winds.

Hail in LANCASTER, PENNSYLVANIA
From 10-JUN-08 16:50:00 to 10-JUN-08 16:50:00 (EST-5)
Location: MILLERSVILLE
Magnitude: 1.00 
Reported by: Trained Spotter

A trained spotter reported quarter-sized hail at Millersville University.

Hail in LANCASTER, PENNSYLVANIA
From 10-JUN-08 16:55:00 to 10-JUN-08 16:55:00 (EST-5)
Location: HAMILTON PARK
Magnitude: 1.00 
Reported by: County Official

The Lancaster County 911 Center relayed several hail reports ranging from pea to quarter size.

Hail in LANCASTER, PENNSYLVANIA
From 10-JUN-08 16:40:00 to 10-JUN-08 16:40:00 (EST-5)
Location: MILLERSVILLE
Magnitude: 1.75 
Reported by: Public

Public reported golf-ball sized hail in Millersville.

Hail in LANCASTER, PENNSYLVANIA
From 10-JUN-08 17:30:00 to 10-JUN-08 17:30:00 (EST-5)
Location: LEOLA
Magnitude: 1.75 
Reported by: Public

Public reported golf-ball sized hail in Leola.

Hail in LANCASTER, PENNSYLVANIA
From 10-JUN-08 17:40:00 to 10-JUN-08 17:40:00 (EST-5)
Location: SOUTH HERMITAGE
Magnitude: 0.88 
Reported by: Public

Public reported nickel-sized hail near New Holland.

Thunderstorm Wind in TIOGA, PENNSYLVANIA
From 10-JUN-08 16:00:00 to 10-JUN-08 16:25:00 (EST-5)
Location: LIBERTY
Magnitude: 70.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Tioga County emergency manager reported a fairly large area of wind damage about three miles east of Liberty on Route 414. The damage included a church steeple blown off, two large trees down onto a house and a large farm building collapsed. The storm continued to move along Route 414 into Bradford County, where additional storm damage occurred. No injuries were reported.

Hail in MONTOUR, PENNSYLVANIA
From 10-JUN-08 16:05:00 to 10-JUN-08 16:05:00 (EST-5)
Location: DANVILLE
Magnitude: 1.00 
Reported by: Public

Public reported quarter-sized hail in Danville.

Thunderstorm Wind in PERRY, PENNSYLVANIA
From 10-JUN-08 16:50:00 to 10-JUN-08 16:50:00 (EST-5)
Location: NEW GERMANTOWN
Magnitude: 50.00 EG
Reported by: Trained Spotter

A retired National Weather Service employee estimated a wind gust of 60 mph near New Germantown on Route 274.

Hail in SCHUYLKILL, PENNSYLVANIA
From 10-JUN-08 16:25:00 to 10-JUN-08 16:25:00 (EST-5)
Location: JONESTOWN
Magnitude: 0.75 
Reported by: Public

Public reported penny-sized hail in Minersville.

Hail in FRANKLIN, PENNSYLVANIA
From 10-JUN-08 16:40:00 to 10-JUN-08 16:40:00 (EST-5)
Location: FT LOUDON
Magnitude: 0.88 
Reported by: Public

Public reported nickel-sized hail in Fort Loudon.

Thunderstorm Wind in HUNTINGDON, PENNSYLVANIA
From 10-JUN-08 16:30:00 to 10-JUN-08 16:45:00 (EST-5)
Location: ALLENPORT
Magnitude: 70.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Sporadic wind damage, mainly to trees, was caused by thunderstorm winds southeast of Mount Union. Damage was mainly confined to German Valley Road, Corner Creek Land, and Loop Road. While most of the damage was to trees, there was some isolated structural damage. A church on Loop Road sustained slight damage from a tree falling on it. On German Valley Road, one home sustained minor damage to roof shingles. Significant structural damage occurred to a mobile home on Loop Road, where the roof and one wall was completely removed from the structure. All of the observed tree damage and structural damage was consistent with straight line winds, with some areas exhibiting divergent patterns consistent with a small downburst. In a few locations, swirling patterns were observed in crops and field grass. However, these damage patterns occurred at locations where straight line winds interacted with hillsides. It was concluded that one or two very small (5 to 10 yard wide) spin up gustnadoes may have occurred, but with winds generally under 50 mph.

Thunderstorm Wind in BEDFORD, PENNSYLVANIA
From 10-JUN-08 15:50:00 to 10-JUN-08 15:50:00 (EST-5)
Location: BEDFORD SPGS
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Bedford County 911 Center reported numerous trees and wires down in Bedford Township. PEMA reported that a abandoned mobile home and dilapidated barn were destroyed. Minor damage was also reported to several other buildings. There were no injuries.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 10-JUN-08 16:30:00 to 10-JUN-08 16:30:00 (EST-5)
Location: SPRING RUN
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Public

Public reported numerous large branches downed just north of Willow Hill.

Hail in ADAMS, PENNSYLVANIA
From 10-JUN-08 18:20:00 to 10-JUN-08 18:20:00 (EST-5)
Location: GETTYSBURG
Magnitude: 1.00 
Reported by: Public

Public reported quarter-sized hail in Gettysburg.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 10-JUN-08 17:45:00 to 10-JUN-08 17:45:00 (EST-5)
Location: EAST BLOOMSBURG
Magnitude: 50.00 EG
Reported by: Trained Spotter

A trained spotter reported numerous trees and wires down near Bloomsburg.