A slow moving low pressure system, and it's associated cold front crossed through the region late in the day on the 26th. Scattered severe thunderstorms, most of which produced wind damage, developed along the frontal boundary in an area of instability and high shear. A microburst occurred in Monongalia county in West Virginia with an estimated wind speed of 70-80 mph.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 26-MAY-11 15:31:00 to 26-MAY-11 15:31:00 (EST-5)
Location: PROSPECT
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Butler emergency manager reports large trees and a utlity line reported down.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 26-MAY-11 15:41:00 to 26-MAY-11 15:41:00 (EST-5)
Location: PROSPECT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Fire rescue reports several trees down on Monrow St. and David St.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 26-MAY-11 15:45:00 to 26-MAY-11 15:45:00 (EST-5)
Location: QUEEN JCT
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reports a large tree down on Beaver Dam Road.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 26-MAY-11 15:45:00 to 26-MAY-11 15:45:00 (EST-5)
Location: WHITSETT
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reports large trees down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 26-MAY-11 16:07:00 to 26-MAY-11 16:07:00 (EST-5)
Location: NEW TEXAS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Allegheny emergency management reports large trees down.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 26-MAY-11 16:43:00 to 26-MAY-11 16:43:00 (EST-5)
Location: STRANGFORD
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reports numerous trees down.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 26-MAY-11 16:45:00 to 26-MAY-11 16:45:00 (EST-5)
Location: PALMERTON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reports numerous trees and power lines down.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 26-MAY-11 16:50:00 to 26-MAY-11 16:50:00 (EST-5)
Location: PUNXSUTAWNEY
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reports trees down.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 26-MAY-11 00:30:00 to 26-MAY-11 00:30:00 (EST-5)
Location: KENNARD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: State Official

A state official reports large branches and power lines down.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 26-MAY-11 15:15:00 to 26-MAY-11 15:15:00 (EST-5)
Location: MIDLAND
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reports that 4 trees are down on Route 68 near the 500 block of Midland.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 26-MAY-11 16:53:00 to 26-MAY-11 16:53:00 (EST-5)
Location: STRANGFORD
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reports numerous trees down.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 26-MAY-11 16:55:00 to 26-MAY-11 16:55:00 (EST-5)
Location: DESIRE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reports trees down on Desire Road.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 26-MAY-11 16:10:00 to 26-MAY-11 16:10:00 (EST-5)
Location: PITCAIRN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reports a power line arcing against a house.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 26-MAY-11 16:11:00 to 26-MAY-11 16:11:00 (EST-5)
Location: LOYALHANNA
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

The public reports trees down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 26-MAY-11 16:11:00 to 26-MAY-11 16:11:00 (EST-5)
Location: PARNASSUS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Westmoreland emergency management reports a tree down on a house.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 26-MAY-11 16:15:00 to 26-MAY-11 16:15:00 (EST-5)
Location: NORTH IRWIN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reports numerous trees down.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 26-MAY-11 16:20:00 to 26-MAY-11 16:20:00 (EST-5)
Location: APOLLO
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reports numerous large trees down.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 26-MAY-11 16:30:00 to 26-MAY-11 16:30:00 (EST-5)
Location: CHALKHILL
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reports that trees and utility lines are down on Fayette Springs Road.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 26-MAY-11 15:27:00 to 26-MAY-11 15:27:00 (EST-5)
Location: NEW BRIGHTON
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

The public reports large branches broken.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 26-MAY-11 16:35:00 to 26-MAY-11 16:35:00 (EST-5)
Location: BRUSH VLY
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reports a tree down on house and power lines down.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 26-MAY-11 16:40:00 to 26-MAY-11 16:40:00 (EST-5)
Location: DAYTON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur radio operator reports several trees and power lines down.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 26-MAY-11 16:41:00 to 26-MAY-11 16:41:00 (EST-5)
Location: EDDYVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reports trees down.