Showers and thunderstorms developed along a stalled frontal boundary that was situated over the upper Ohio Valley. Strong to severe storms resulted in several reports of downed trees and hail in southwestern Pennsylvania and eastern Ohio.

Hail in WASHINGTON, PENNSYLVANIA
From 12-MAY-18 15:18:00 to 12-MAY-18 15:18:00 (EST-5)
Location: WEST ALEXANDER
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHINGTON, PENNSYLVANIA
From 12-MAY-18 15:29:00 to 12-MAY-18 15:29:00 (EST-5)
Location: CHARLEROI
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WASHINGTON, PENNSYLVANIA
From 12-MAY-18 16:40:00 to 12-MAY-18 16:40:00 (EST-5)
Location: THOMAS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 14:43:00 to 12-MAY-18 14:43:00 (EST-5)
Location: MURRYSVILLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 14:50:00 to 12-MAY-18 14:50:00 (EST-5)
Location: DELMONT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 14:57:00 to 12-MAY-18 14:57:00 (EST-5)
Location: NEW ALEXANDRIA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 15:32:00 to 12-MAY-18 15:32:00 (EST-5)
Location: MT PLEASANT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 15:37:00 to 12-MAY-18 15:37:00 (EST-5)
Location: PRICEDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 15:45:00 to 12-MAY-18 15:45:00 (EST-5)
Location: SMITHTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 12-MAY-18 14:25:00 to 12-MAY-18 14:25:00 (EST-5)
Location: CHERRY CITY
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

The public reported trees down at the intersection of Friendship Avenue and Roup Avenue.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 12-MAY-18 15:09:00 to 12-MAY-18 15:09:00 (EST-5)
Location: MORRISVILLE
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Local 911 reported several trees down around the city of Waynesburg and outskirts, including railroad tracks. One large tree brought down power poles.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 12-MAY-18 16:40:00 to 12-MAY-18 16:40:00 (EST-5)
Location: VENETIA
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Local 911 call center reported trees down along Bower Hill Road at Sienna Trail.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 12-MAY-18 16:43:00 to 12-MAY-18 16:43:00 (EST-5)
Location: VENETIA
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: State Official

State official reported many trees down along Barr Road and Lutes road.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 14:50:00 to 12-MAY-18 14:50:00 (EST-5)
Location: DELMONT
Magnitude: 50.00 EG
Property damage: 0.25K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree down on Maplewood Drive.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 15:22:00 to 12-MAY-18 15:22:00 (EST-5)
Location: WEST FAIRFIELD
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down along Creek Road.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 15:40:00 to 12-MAY-18 15:40:00 (EST-5)
Location: FELLSBURG
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

State official trees down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 12-MAY-18 16:50:00 to 12-MAY-18 16:50:00 (EST-5)
Location: BIDDLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

State official reported a tree down along Bridge Street.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 12-MAY-18 16:40:00 to 12-MAY-18 16:40:00 (EST-5)
Location: VENETIA
Magnitude: 56.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: State Official

State official reported dozens of trees snapped or uprooted. Roof barn and carport removed, along with other structural damage noted.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 12-MAY-18 16:40:00 to 12-MAY-18 16:40:00 (EST-5)
Location: THOMAS
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

State official reported that high tension lines were down along Valley View Road. There is widespread tree damage in this vicinity and along Munntown Road associated with earlier reported downburst.