A stationary front that set up just north of I-80 became the focus for convection on the afternoon of April 10th as a shortwave riding along the front approached. Several lines of showers and thunderstorms produced damaging winds and large hail as they sank southeastward across the region.

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 14:00:00 to 10-APR-13 14:00:00 (EST-5)
Location: CARNEGIE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in MERCER, PENNSYLVANIA
From 10-APR-13 14:00:00 to 10-APR-13 14:00:00 (EST-5)
Location: MERCER
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 10-APR-13 15:20:00 to 10-APR-13 15:20:00 (EST-5)
Location: WEST FAIRFIELD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 10-APR-13 15:20:00 to 10-APR-13 15:20:00 (EST-5)
Location: WEST FAIRFIELD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHINGTON, PENNSYLVANIA
From 10-APR-13 16:43:00 to 10-APR-13 16:43:00 (EST-5)
Location: CECIL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 16:45:00 to 10-APR-13 16:45:00 (EST-5)
Location: SYGAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHINGTON, PENNSYLVANIA
From 10-APR-13 16:45:00 to 10-APR-13 16:45:00 (EST-5)
Location: CECIL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 10-APR-13 16:48:00 to 10-APR-13 16:48:00 (EST-5)
Location: MURRYSVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 16:55:00 to 10-APR-13 16:55:00 (EST-5)
Location: BOWER HILL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: CoCoRaHS

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 17:00:00 to 10-APR-13 17:00:00 (EST-5)
Location: PLEASANT HILLS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 17:01:00 to 10-APR-13 17:01:00 (EST-5)
Location: PLEASANT HILLS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 17:02:00 to 10-APR-13 17:02:00 (EST-5)
Location: BOWER HILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 17:03:00 to 10-APR-13 17:03:00 (EST-5)
Location: BRENTWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 10-APR-13 16:48:00 to 10-APR-13 16:48:00 (EST-5)
Location: HERMITAGE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

The public reported damage to an Eat N Park sign in Hermitage via social media.

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 17:05:00 to 10-APR-13 17:05:00 (EST-5)
Location: RIVERTON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 17:22:00 to 10-APR-13 17:22:00 (EST-5)
Location: WHITE OAK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 18:02:00 to 10-APR-13 18:02:00 (EST-5)
Location: HIGHCLIFF
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 18:04:00 to 10-APR-13 18:04:00 (EST-5)
Location: TALLEY GAVEY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 10-APR-13 19:57:00 to 10-APR-13 19:57:00 (EST-5)
Location: CARNOT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 13:22:00 to 10-APR-13 13:22:00 (EST-5)
Location: SIGEL
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree down on route 899.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 10-APR-13 16:50:00 to 10-APR-13 16:50:00 (EST-5)
Location: PLAIN GROVE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees and wires down.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 10-APR-13 17:00:00 to 10-APR-13 17:00:00 (EST-5)
Location: SANDY LAKE
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

The public reported trees and power lines down.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 10-APR-13 17:00:00 to 10-APR-13 17:00:00 (EST-5)
Location: EMLENTON STATION
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees and wires down on houses and cars. People were trapped in houses due to downed live wires.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 10-APR-13 17:25:00 to 10-APR-13 17:25:00 (EST-5)
Location: CLARION PARKER ARPT
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported a roof blown off a house and numerous trees down.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 10-APR-13 17:15:00 to 10-APR-13 17:15:00 (EST-5)
Location: CLINTONVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees and wires down.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 10-APR-13 16:50:00 to 10-APR-13 16:50:00 (EST-5)
Location: CHARLESTON
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported that a house was damaged on Charleston Rd.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 10-APR-13 17:45:00 to 10-APR-13 17:45:00 (EST-5)
Location: KITTANNING
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down on wires along State Route 85.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 10-APR-13 17:53:00 to 10-APR-13 17:53:00 (EST-5)
Location: ROSSTON
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reported that metal poles pulled down wires.

Thunderstorm Wind in FOREST, PENNSYLVANIA
From 10-APR-13 13:27:00 to 10-APR-13 13:27:00 (EST-5)
Location: CLARINGTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

Department of highways reported trees down along State Route 2002, along the Clarion River.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 10-APR-13 17:35:00 to 10-APR-13 17:35:00 (EST-5)
Location: REESEDALE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reported trees and wires down.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 10-APR-13 17:50:00 to 10-APR-13 17:50:00 (EST-5)
Location: WALKCHALK
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down on wires.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 10-APR-13 16:50:00 to 10-APR-13 16:50:00 (EST-5)
Location: HARBOR BRIDGE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down on Matthews and Garner Road.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 10-APR-13 16:55:00 to 10-APR-13 16:55:00 (EST-5)
Location: WIEGLETOWN
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down on Aiken Road.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 10-APR-13 17:30:00 to 10-APR-13 17:30:00 (EST-5)
Location: BRADYS BEND
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reported power lines down across Seybertown Road.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 10-APR-13 14:55:00 to 10-APR-13 14:55:00 (EST-5)
Location: FIVE PTS
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree down on wires in Salem Township.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 10-APR-13 16:40:00 to 10-APR-13 16:40:00 (EST-5)
Location: MAYSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported that several trees were snapped off and there was some damage to a small structure on Hilltop Road in West Salem Township.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 10-APR-13 16:45:00 to 10-APR-13 16:45:00 (EST-5)
Location: HERMITAGE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees, poles, and wires were down.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 10-APR-13 16:45:00 to 10-APR-13 16:45:00 (EST-5)
Location: FARRELL
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported that a roof was blown off of a Steel Mill in Hermitage.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 10-APR-13 16:48:00 to 10-APR-13 16:48:00 (EST-5)
Location: PULASKI
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees and wires down.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 17:39:00 to 10-APR-13 17:39:00 (EST-5)
Location: BROOKVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

State official reported numerous trees topped 15 to 20 feet above ground level.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 17:45:00 to 10-APR-13 17:45:00 (EST-5)
Location: HAZEN
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree down along Interstate 80 westbound.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 10-APR-13 17:48:00 to 10-APR-13 17:48:00 (EST-5)
Location: YATESBORO
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree down on road along Hills Church Road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 17:50:00 to 10-APR-13 17:50:00 (EST-5)
Location: WISHAW
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down near route 310 and Wishaw Road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 17:52:00 to 10-APR-13 17:52:00 (EST-5)
Location: HAMILTON
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree down on Hamilton-Porter Road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 17:57:00 to 10-APR-13 17:57:00 (EST-5)
Location: PUNXSUTAWNEY ARPT
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down near Robertsville road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 17:59:00 to 10-APR-13 17:59:00 (EST-5)
Location: CLOE
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree down Bair Road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 18:00:00 to 10-APR-13 18:00:00 (EST-5)
Location: BIG RUN
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree on a car on Route 119.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 10-APR-13 20:45:00 to 10-APR-13 20:45:00 (EST-5)
Location: SHEARERSBURG
Magnitude: 30.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported trees and wires down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 10-APR-13 20:50:00 to 10-APR-13 20:50:00 (EST-5)
Location: PAULTON
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported trees down in Washington Township.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 10-APR-13 17:37:00 to 10-APR-13 17:37:00 (EST-5)
Location: EMLENTON STATION
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

State official reported the collapse of a building at a lumber yard.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 10-APR-13 16:50:00 to 10-APR-13 16:50:00 (EST-5)
Location: ROBINSON
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down on Erskine Quarry Road.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 10-APR-13 16:55:00 to 10-APR-13 16:55:00 (EST-5)
Location: EAST NEW CASTLE
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down on Old Pittsburgh Road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 10-APR-13 17:57:00 to 10-APR-13 17:57:00 (EST-5)
Location: BIG RUN
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down near Mill Road.

Thunderstorm Wind in FOREST, PENNSYLVANIA
From 10-APR-13 13:18:00 to 10-APR-13 13:18:00 (EST-5)
Location: CLARINGTON
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported trees down in Barnett Township on Route 899 and River Road.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 10-APR-13 16:45:00 to 10-APR-13 16:45:00 (EST-5)
Location: SHARPSVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees, poles, and wires down.