A powerful cold front moved across the Ohio Valley on the evening of the 11th as strong low pressure moved north across the Great Lakes. A convective line along the cold front produced widespread damage across eastern Ohio, western Pennsylvania, northern West Virginia, and Garrett county Maryland with thunderstorm wind gusts of 60 to 70 MPH and a peak wind gust of 92 MPH at Allegheny County Airport near Pittsburgh. High winds gusting to 60 MPH behind the front in a strong pressure gradient produced wind damage across the entire region into midday on the 12th. In all across eastern Ohio, western Pennsylvania, northern West Virginia and Garrett county Maryland over one half million homes and businesses were without power at some point during the storm.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 11-FEB-09 20:15:00 to 11-FEB-09 20:15:00 (EST-5)
Location: GROVE CITY
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees and power lines down in Grove City.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 11-FEB-09 20:30:00 to 11-FEB-09 20:30:00 (EST-5)
Location: GREENSBURG
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

The public reported trees down in Greensburg.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 11-FEB-09 19:30:00 to 11-FEB-09 19:30:00 (EST-5)
Location: WASHINGTON
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Law Enforcement

Law enforcement reported trees down in Washington.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 11-FEB-09 19:45:00 to 11-FEB-09 19:45:00 (EST-5)
Location: SWEENEYS XRDS
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Public

The public reported trees and power lines down east of Donora.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 11-FEB-09 19:50:00 to 11-FEB-09 19:50:00 (EST-5)
Location: TANOMA
Magnitude: 50.00 EG
Crop damage: 0.00K
Reported by: Public

The public reported trees down southeast of Davis.

High Wind in ALLEGHENY, PENNSYLVANIA
From 12-FEB-09 01:07:00 to 12-FEB-09 04:00:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 300.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High Wind in ARMSTRONG, PENNSYLVANIA
From 12-FEB-09 07:10:00 to 12-FEB-09 09:10:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High Wind in BEAVER, PENNSYLVANIA
From 12-FEB-09 02:00:00 to 12-FEB-09 05:00:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 11-FEB-09 19:55:00 to 11-FEB-09 19:55:00 (EST-5)
Location: FARMINGTON
Magnitude: 52.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a wind gust to 60 MPH. The wind was accompanied by dime size hail.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 11-FEB-09 19:47:00 to 11-FEB-09 19:47:00 (EST-5)
Location: BROWNSVILLE
Magnitude: 76.00 EG
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 87 MPH wind gust north of Brownsville.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 11-FEB-09 20:30:00 to 11-FEB-09 20:30:00 (EST-5)
Location: PENN RUN
Magnitude: 70.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An NWS storm survey found damage from a microburst north of Yellow Creek State Park off of Harmony and College Lodge Roads. The path length was about one half mile with a width of intermittent damage about 200 yards wide. Two homes suffered roof damage as well as damage to siding and rain spouting. An outbuilding was destroyed with numerous trees toppled or snapped. Maximum winds were estimated at 80 MPH.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 11-FEB-09 20:35:00 to 11-FEB-09 20:35:00 (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 trees down in Indiana.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 11-FEB-09 19:50:00 to 11-FEB-09 19:50:00 (EST-5)
Location: NEW TEXAS
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported a large tree down in Plum which ruptured a 10 inch natural gas line. 200 residents were evacuated as a precaution.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 11-FEB-09 20:35:00 to 11-FEB-09 20:35:00 (EST-5)
Location: MERCER
Magnitude: 50.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported trees and power lines down in Mercer.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 11-FEB-09 19:53:00 to 11-FEB-09 19:53:00 (EST-5)
Location: ALLEGHENY CO ARPT
Magnitude: 80.00 EG
Crop damage: 0.00K
Reported by: ASOS

The ASOS at Allegheny County airport recored a wind gust to 92 MPH.

High Wind in LAWRENCE, PENNSYLVANIA
From 12-FEB-09 00:40:00 to 12-FEB-09 03:00:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High Wind in MERCER, PENNSYLVANIA
From 12-FEB-09 01:07:00 to 12-FEB-09 03:00:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High Wind in VENANGO, PENNSYLVANIA
From 12-FEB-09 01:53:00 to 12-FEB-09 03:00:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High Wind in WASHINGTON, PENNSYLVANIA
From 12-FEB-09 02:00:00 to 12-FEB-09 04:00:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High Wind in BUTLER, PENNSYLVANIA
From 12-FEB-09 06:05:00 to 12-FEB-09 08:05:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Employee

High Wind in CLARION, PENNSYLVANIA
From 12-FEB-09 08:15:00 to 12-FEB-09 09:15:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High Wind in WESTMORELAND, PENNSYLVANIA
From 12-FEB-09 02:33:00 to 12-FEB-09 04:33:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Public

High Wind in INDIANA, PENNSYLVANIA
From 12-FEB-09 06:55:00 to 12-FEB-09 08:55:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Trained Spotter

High Wind in FAYETTE, PENNSYLVANIA
From 12-FEB-09 08:20:00 to 12-FEB-09 09:20:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High Wind in FOREST, PENNSYLVANIA
From 12-FEB-09 08:15:00 to 12-FEB-09 09:15:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Law Enforcement

High Wind in GREENE, PENNSYLVANIA
From 12-FEB-09 02:00:00 to 12-FEB-09 04:00:00 (EST-5)
Magnitude: 50.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High Wind in JEFFERSON, PENNSYLVANIA
From 12-FEB-09 02:39:00 to 12-FEB-09 02:39:00 (EST-5)
Magnitude: 57.00 EG
Crop damage: 0.00K
Reported by: ASOS

ASOS recorded a wind gust to 66 MPH at the Dubois airport.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 11-FEB-09 19:10:00 to 11-FEB-09 19:10:00 (EST-5)
Location: WEST FINLEY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported a roof blown off a mobile home near West Finley.