Scattered severe thunderstorms developed across western Pennsylvania in the late afternoon of the 10th well ahead of a cold front crossing Ohio.

Hail in BEAVER, PENNSYLVANIA
From 10-MAY-13 15:05:00 to 10-MAY-13 15:05:00 (EST-5)
Location: WEST MAYFIELD
Magnitude: 1.50 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BEAVER, PENNSYLVANIA
From 10-MAY-13 15:06:00 to 10-MAY-13 15:06:00 (EST-5)
Location: NEW BRIGHTON
Magnitude: 0.75 
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 10-MAY-13 14:00:00 to 10-MAY-13 14:00:00 (EST-5)
Location: MORRISVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Home had roof damage on Morris Street.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 10-MAY-13 15:00:00 to 10-MAY-13 15:00:00 (EST-5)
Location: CARNEGIE
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees and wires were reported down in Carnegie, Green Tree, and Scott Township.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 10-MAY-13 15:15:00 to 10-MAY-13 15:15:00 (EST-5)
Location: NEVILLE IS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

The public reported a tree down near Ben Avon.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 10-MAY-13 15:30:00 to 10-MAY-13 15:30:00 (EST-5)
Location: WATTERS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

The public reported a tree down on a power line.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 10-MAY-13 15:35:00 to 10-MAY-13 15:35:00 (EST-5)
Location: SCHENLEY
Magnitude: 50.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The 911 call center reported trees and power lines down around Freeport.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 10-MAY-13 15:39:00 to 10-MAY-13 15:41:00 (EST-5)
Location: BUTLER
Magnitude: 70.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An NWS storm survey found a swath of damage from near Little Stone Lane and Crisswell Road to near Freeport Road and Phil Mar Drive. Considerable tree damage was encountered along Saxonburg Road, where several trees of large diameter were snapped 10 feet above ground. Additional trees were uprooted and large limbs snapped.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 10-MAY-13 15:41:00 to 10-MAY-13 15:41:00 (EST-5)
Location: BUTLER
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An NWS storm survey found sporadic tree damage along Herman Road east of Butler. A few limbs were snapped and a medium sized diameter tree was snapped 20 to 30 Feet above the ground.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 10-MAY-13 15:44:00 to 10-MAY-13 15:44:00 (EST-5)
Location: HOMEACRE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

The public reported a tree down on a car at the intersection of SR 8 and SR 422.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 10-MAY-13 15:55:00 to 10-MAY-13 15:55:00 (EST-5)
Location: WALKCHALK
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

The public reported trees down west of Kittanning.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 10-MAY-13 16:12:00 to 10-MAY-13 16:12:00 (EST-5)
Location: CALLENSBURG
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported a tree down in Callensburg.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 10-MAY-13 16:15:00 to 10-MAY-13 16:15:00 (EST-5)
Location: NEWTOWN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported trees down in Dunkard and Perry Township.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 10-MAY-13 16:20:00 to 10-MAY-13 16:20:00 (EST-5)
Location: LIMESTONE
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The 911 call center reported trees and wires down near Limestone.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 10-MAY-13 16:25:00 to 10-MAY-13 16:25:00 (EST-5)
Location: CLARION PARKER ARPT
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The 911 call center reported trees and wires down in Clarion.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 10-MAY-13 17:12:00 to 10-MAY-13 17:12:00 (EST-5)
Location: LIGONIER
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The 911 call center reported trees and wires down near Ligonier.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 10-MAY-13 17:00:00 to 10-MAY-13 17:00:00 (EST-5)
Location: (LBE)LATROBE ARPT
Magnitude: 54.00 MG
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 10-MAY-13 16:24:00 to 10-MAY-13 16:24:00 (EST-5)
Location: KNOX
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The 911 call center reported trees and wires down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 10-MAY-13 16:55:00 to 10-MAY-13 16:55:00 (EST-5)
Location: CALUMET
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The 911 call center reported trees and wires down in Mount Pleasant.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 10-MAY-13 17:00:00 to 10-MAY-13 17:00:00 (EST-5)
Location: YOUNGSTOWN
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The 911 call center reported trees and wires down.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 10-MAY-13 15:35:00 to 10-MAY-13 15:36:00 (EST-5)
Location: BUTLER GRAHAM ARPT
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An NWS storm survey showed a narrow swath of sporadic tree damage from near Airport Road and State Route 8 to near Mushrush Road and Winters Road. Damage included a large tree uprooted along State Route 8, along with downed limbs and small trees snapped.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 10-MAY-13 16:35:00 to 10-MAY-13 16:35:00 (EST-5)
Location: LEITH
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Newspaper

Trees and power lines were reported down in Uniontown.