A stalled frontal boundary was the focus for scattered severe thunderstorms across portions of western Pennsylvania. A slow moving thunderstorm produced isolated flash flooding over Garrett county Maryland.

Hail in BUTLER, PENNSYLVANIA
From 27-MAY-12 14:25:00 to 27-MAY-12 14:25:00 (EST-5)
Location: HARRISVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LAWRENCE, PENNSYLVANIA
From 27-MAY-12 14:26:00 to 27-MAY-12 14:26:00 (EST-5)
Location: WALMO
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BUTLER, PENNSYLVANIA
From 27-MAY-12 14:31:00 to 27-MAY-12 14:31:00 (EST-5)
Location: MURRINSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 27-MAY-12 16:03:00 to 27-MAY-12 16:03:00 (EST-5)
Location: WILMERDING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 27-MAY-12 16:27:00 to 27-MAY-12 16:27:00 (EST-5)
Location: LINCOLN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 27-MAY-12 16:50:00 to 27-MAY-12 16:50:00 (EST-5)
Location: RILLTON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 27-MAY-12 17:14:00 to 27-MAY-12 17:14:00 (EST-5)
Location: NORTH IRWIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 27-MAY-12 17:32:00 to 27-MAY-12 17:32:00 (EST-5)
Location: RILLTON
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 27-MAY-12 13:20:00 to 27-MAY-12 13:20:00 (EST-5)
Location: WAMPUM
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported trees and power lines down near Wampum.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 27-MAY-12 15:50:00 to 27-MAY-12 15:50:00 (EST-5)
Location: ELDERTON
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported several trees down.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 27-MAY-12 14:10:00 to 27-MAY-12 14:10:00 (EST-5)
Location: ELORA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported a tree down on a mobile home.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 27-MAY-12 14:29:00 to 27-MAY-12 14:29:00 (EST-5)
Location: CRANBERRY
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported trees and power lines down.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 27-MAY-12 15:20:00 to 27-MAY-12 15:20:00 (EST-5)
Location: BROOKVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a large tree down on a vehicle.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 27-MAY-12 15:02:00 to 27-MAY-12 15:02:00 (EST-5)
Location: MECHANICSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported a large tree down at Forest Drive and Miller Road.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 27-MAY-12 15:39:00 to 27-MAY-12 15:39:00 (EST-5)
Location: GRACETON
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported numerous trees down.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 27-MAY-12 15:39:00 to 27-MAY-12 15:39:00 (EST-5)
Location: MC WILLIAMS
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported numerous trees down.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 27-MAY-12 15:58:00 to 27-MAY-12 15:58:00 (EST-5)
Location: MARION CENTER
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported numerous large tree limbs down.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 27-MAY-12 16:15:00 to 27-MAY-12 16:15:00 (EST-5)
Location: CHEVY CHASE HGTS
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees and power lines down in and around the town of Indiana.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-MAY-12 16:39:00 to 27-MAY-12 16:39:00 (EST-5)
Location: LOYALHANNA
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-MAY-12 17:12:00 to 27-MAY-12 17:12:00 (EST-5)
Location: LIGONIER
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported several trees down near Ligonier.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 27-MAY-12 16:45:00 to 27-MAY-12 16:45:00 (EST-5)
Location: ARMAGH
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported trees down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-MAY-12 17:35:00 to 27-MAY-12 17:35:00 (EST-5)
Location: DONEGAL
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a large tree down.

Hail in LAWRENCE, PENNSYLVANIA
From 27-MAY-12 13:55:00 to 27-MAY-12 13:55:00 (EST-5)
Location: WALMO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LAWRENCE, PENNSYLVANIA
From 27-MAY-12 13:56:00 to 27-MAY-12 13:56:00 (EST-5)
Location: NEW CASTLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LAWRENCE, PENNSYLVANIA
From 27-MAY-12 14:02:00 to 27-MAY-12 14:02:00 (EST-5)
Location: WALMO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LAWRENCE, PENNSYLVANIA
From 27-MAY-12 14:04:00 to 27-MAY-12 14:04:00 (EST-5)
Location: WALMO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 27-MAY-12 14:52:00 to 27-MAY-12 14:52:00 (EST-5)
Location: ALUM ROCK
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported trees down across roadways.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 27-MAY-12 16:47:00 to 27-MAY-12 16:47:00 (EST-5)
Location: DERRY
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

The public reported several trees down.

Hail in ALLEGHENY, PENNSYLVANIA
From 27-MAY-12 16:03:00 to 27-MAY-12 16:03:00 (EST-5)
Location: WILMERDING
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public