As a low pressure system tracked along a warm front across Ohio and Pennsylvania severe thunderstorms developed just south of the front in Ohio and progressed eastward. Large hail was reported with many of the storms, with hail up to the size of golf balls reported in both Ohio and Pennsylvania. A strong supercell thunderstorm produced an EF-2 tornado that crossed through Westmoreland county in Pennsylvania during rush hour. Around 90 homes sustained damage in Westmoreland county.

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 16:04:00 to 23-MAR-11 16:04:00 (EST-5)
Location: WHITNEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:05:00 to 23-MAR-11 16:05:00 (EST-5)
Location: WEXFORD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 16:10:00 to 23-MAR-11 16:10:00 (EST-5)
Location: LOYALHANNA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:12:00 to 23-MAR-11 16:12:00 (EST-5)
Location: EAST CARNEGIE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:15:00 to 23-MAR-11 16:15:00 (EST-5)
Location: EAST CARNEGIE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:15:00 to 23-MAR-11 16:15:00 (EST-5)
Location: HIGHCLIFF
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:16:00 to 23-MAR-11 16:16:00 (EST-5)
Location: OPTION
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:17:00 to 23-MAR-11 16:17:00 (EST-5)
Location: BELLEVUE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:18:00 to 23-MAR-11 16:18:00 (EST-5)
Location: OPTION
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:20:00 to 23-MAR-11 16:20:00 (EST-5)
Location: WEST MIFFLIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 23-MAR-11 16:33:00 to 23-MAR-11 16:33:00 (EST-5)
Location: EAST CALIFORNIA
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reports trees and power lines down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 16:37:00 to 23-MAR-11 16:37:00 (EST-5)
Location: RILLTON
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

The public reports trees down in the Rillton area.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 16:30:00 to 23-MAR-11 16:30:00 (EST-5)
Location: FELLSBURG
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reports numerous trees and power lines down.

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 16:32:00 to 23-MAR-11 16:32:00 (EST-5)
Location: BIDDLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 23-MAR-11 16:45:00 to 23-MAR-11 16:45:00 (EST-5)
Location: CONNELLSVILLE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reoprts roof damage.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 23-MAR-11 17:45:00 to 23-MAR-11 17:45:00 (EST-5)
Location: CHARLEROI
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

The public reports several trees down.

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 14:55:00 to 23-MAR-11 14:55:00 (EST-5)
Location: OPTION
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 14:55:00 to 23-MAR-11 14:55:00 (EST-5)
Location: HIGHCLIFF
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 15:00:00 to 23-MAR-11 15:00:00 (EST-5)
Location: GAYLY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FAYETTE, PENNSYLVANIA
From 23-MAR-11 15:00:00 to 23-MAR-11 15:00:00 (EST-5)
Location: FARMINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 23-MAR-11 18:00:00 to 23-MAR-11 18:00:00 (EST-5)
Location: OHIOPYLE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

The public reports trees down.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 23-MAR-11 17:00:00 to 23-MAR-11 17:00:00 (EST-5)
Location: CONNELLSVILLE
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: State Official

State official reports several trees and power lines down.

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 15:10:00 to 23-MAR-11 15:10:00 (EST-5)
Location: BOWER HILL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:45:00 to 23-MAR-11 15:54:00 (EST-5)
Location: RILLTON
Tornado F-scale: EF2
Property damage: 4.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

The National Weather Service survey team confirmed a tornado in hempfield township in Westmoreland county. The tornado initially touched down in the Sewickley township area/Rillton section and then moved along route 136 in Hempfield township. There were numerous single family homes damaged in the Rillton area with some having homes having their entire rooves removed. In addition, one home lost an exterior wall. Numerous trees were uprooted in the area as well. Damage was then observed near the Hempfield bus garage with damage to multiple structures. Near this location was when the path width was the largest. Moving farther east, the Hempfield Senior Highschool scoreboard was knocked down and several light posts were snapped. Track and field equipment was displaced several hundred yards from their original locations. Extensive damage was done to the entry way to the football stadium at the high school. In the Fort Allen area, several homes sustained roof damage. One home in the area lost an exterior wall and saw its roofs displaced several hundred yards.

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 15:16:00 to 23-MAR-11 15:16:00 (EST-5)
Location: OPTION
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BEAVER, PENNSYLVANIA
From 23-MAR-11 15:19:00 to 23-MAR-11 15:19:00 (EST-5)
Location: WEST ALIQUIPPA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 15:20:00 to 23-MAR-11 15:20:00 (EST-5)
Location: WEXFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 15:30:00 to 23-MAR-11 15:30:00 (EST-5)
Location: RIVERTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 15:35:00 to 23-MAR-11 15:35:00 (EST-5)
Location: CHURCHILL
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:36:00 to 23-MAR-11 15:36:00 (EST-5)
Location: AVONMORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 15:38:00 to 23-MAR-11 15:38:00 (EST-5)
Location: RIVERTON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:38:00 to 23-MAR-11 15:38:00 (EST-5)
Location: NORTH IRWIN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:44:00 to 23-MAR-11 15:44:00 (EST-5)
Location: NORTH IRWIN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in INDIANA, PENNSYLVANIA
From 23-MAR-11 15:45:00 to 23-MAR-11 15:45:00 (EST-5)
Location: WHITE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:46:00 to 23-MAR-11 15:46:00 (EST-5)
Location: GRAPEVILLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:50:00 to 23-MAR-11 15:50:00 (EST-5)
Location: GREENSBURG
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BEAVER, PENNSYLVANIA
From 23-MAR-11 15:52:00 to 23-MAR-11 15:52:00 (EST-5)
Location: KENDALL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:56:00 to 23-MAR-11 15:56:00 (EST-5)
Location: LOYALHANNA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:57:00 to 23-MAR-11 15:57:00 (EST-5)
Location: GREENSBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 23-MAR-11 17:45:00 to 23-MAR-11 17:45:00 (EST-5)
Location: CHARLEROI
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Newspaper

A large section of the roof of a Model Cleaners was removed.

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:57:00 to 23-MAR-11 15:57:00 (EST-5)
Location: LOYALHANNA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:59:00 to 23-MAR-11 15:59:00 (EST-5)
Location: LOYALHANNA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 16:03:00 to 23-MAR-11 16:03:00 (EST-5)
Location: GREENSBURG
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 16:03:00 to 23-MAR-11 16:03:00 (EST-5)
Location: LOYALHANNA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 15:06:00 to 23-MAR-11 15:06:00 (EST-5)
Location: IMPERIAL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:30:00 to 23-MAR-11 15:30:00 (EST-5)
Location: BLACKBURN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 15:42:00 to 23-MAR-11 15:42:00 (EST-5)
Location: ADAMSBURG
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FAYETTE, PENNSYLVANIA
From 23-MAR-11 15:53:00 to 23-MAR-11 15:53:00 (EST-5)
Location: MARTIN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:00:00 to 23-MAR-11 16:00:00 (EST-5)
Location: CARNOT
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Hail in WESTMORELAND, PENNSYLVANIA
From 23-MAR-11 16:14:00 to 23-MAR-11 16:14:00 (EST-5)
Location: LOYALHANNA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALLEGHENY, PENNSYLVANIA
From 23-MAR-11 16:21:00 to 23-MAR-11 16:21:00 (EST-5)
Location: OPTION
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter