Storms developed the afternoon of the 13th as a result of a passing shortwave to the south and a slow moving trough located north of the Great Lakes. Just like the previous day, despite the fact that effective shear was slightly weak, DCAPE was ranging between 900 to 1000 J/kg. Also the ground was well saturated from storms the previous day, therefore a number of isolated areas were vulnerable to flooding.

Hail in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:03:00 to 13-AUG-21 18:03:00 (EST-5)
Location: IMPERIAL
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 13-AUG-21 16:49:00 to 13-AUG-21 16:49:00 (EST-5)
Location: BLUFF
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported a tree blocking Toms Run Road near Grinnage Run Road.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 13-AUG-21 17:00:00 to 13-AUG-21 17:00:00 (EST-5)
Location: DEER LICK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported a tree down on Deerlick Station Road.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 13-AUG-21 17:19:00 to 13-AUG-21 17:19:00 (EST-5)
Location: NINEVEH
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported a tree down in Morris Township.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 17:29:00 to 13-AUG-21 17:29:00 (EST-5)
Location: BEAVER FALLS CO ARPT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported numerous trees down in the area.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 13-AUG-21 17:45:00 to 13-AUG-21 17:45:00 (EST-5)
Location: BELLE VERNON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of trees down along Twilight Hollow Road.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 17:48:00 to 13-AUG-21 17:48:00 (EST-5)
Location: FALLSTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported numerous trees down in the area.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 17:48:00 to 13-AUG-21 17:48:00 (EST-5)
Location: EASTVALE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center report numerous trees down in Daugherty Township.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 17:48:00 to 13-AUG-21 17:48:00 (EST-5)
Location: NEW BRIGHTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported numerous trees down.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 17:53:00 to 13-AUG-21 17:53:00 (EST-5)
Location: FALLSTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of trees down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:00:00 to 13-AUG-21 18:00:00 (EST-5)
Location: IMPERIAL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A NWS Employee reported numerous large trees down on Grandview and Gregg Lane.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 18:01:00 to 13-AUG-21 18:01:00 (EST-5)
Location: NEW BRIGHTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported trees and wires down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 13-AUG-21 18:05:00 to 13-AUG-21 18:05:00 (EST-5)
Location: WEST NEWTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported numerous trees down in Rostraver Township.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:12:00 to 13-AUG-21 18:12:00 (EST-5)
Location: GAYLY
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of 40 foot trees down near Bellview Circle.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:17:00 to 13-AUG-21 18:17:00 (EST-5)
Location: IMPERIAL
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported siding from a house was blown off and trees were blown down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:35:00 to 13-AUG-21 18:35:00 (EST-5)
Location: CHERRY CITY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported branches and small trees down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:45:00 to 13-AUG-21 18:45:00 (EST-5)
Location: LOGANS FERRY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of large tree limbs down in Springdale Township.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 18:01:00 to 13-AUG-21 18:01:00 (EST-5)
Location: SUNFLOWER
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported numerous trees down.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 18:52:00 to 13-AUG-21 18:52:00 (EST-5)
Location: FRISCO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported numerous trees down in the area.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 13-AUG-21 18:39:00 to 13-AUG-21 18:39:00 (EST-5)
Location: GREENSBURG
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported multiple trees and power lines down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 13-AUG-21 18:58:00 to 13-AUG-21 18:58:00 (EST-5)
Location: EDGECLIFF
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported multiple trees and power lines down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 13-AUG-21 19:00:00 to 13-AUG-21 19:00:00 (EST-5)
Location: MILLIGANTOWN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported multiple trees and power lines down.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 13-AUG-21 18:03:00 to 13-AUG-21 18:03:00 (EST-5)
Location: SPEERS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of trees and wires down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:40:00 to 13-AUG-21 18:40:00 (EST-5)
Location: CHERRY CITY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A local citizen reported trees down.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 18:51:00 to 13-AUG-21 18:51:00 (EST-5)
Location: NEW BRIGHTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

An NWS Employee reported several trees snapped in half.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:15:00 to 13-AUG-21 18:15:00 (EST-5)
Location: PITTOCK
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A citizen reported tree limbs and power poles down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:10:00 to 13-AUG-21 18:10:00 (EST-5)
Location: IMPERIAL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A citizen reported trees down in Imperial.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 13-AUG-21 18:03:00 to 13-AUG-21 18:03:00 (EST-5)
Location: BOWEST JCT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of trees down.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 13-AUG-21 19:12:00 to 13-AUG-21 19:12:00 (EST-5)
Location: CHRISTY MANOR
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of trees down around Crooked Creek Park.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 13-AUG-21 18:31:00 to 13-AUG-21 18:31:00 (EST-5)
Location: LAURELVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported trees down in Bullskin Township.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 18:20:00 to 13-AUG-21 18:20:00 (EST-5)
Location: BOCKTOWN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported trees down in Independence Township.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 13-AUG-21 18:28:00 to 13-AUG-21 18:28:00 (EST-5)
Location: KEPPLES CORNERS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported trees and wires down on Route 268, south of Route 68.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 18:07:00 to 13-AUG-21 18:07:00 (EST-5)
Location: CLINTON
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Allegheny County Airport measured a 53 knot wind gust.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 13-AUG-21 18:23:00 to 13-AUG-21 18:23:00 (EST-5)
Location: CHICORA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported a tree down in the 100 Block near Green Street.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 13-AUG-21 18:29:00 to 13-AUG-21 18:29:00 (EST-5)
Location: FIVE PTS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Department of Highways reported tree down in Hopewell along Route 151.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 13-AUG-21 19:09:00 to 13-AUG-21 19:09:00 (EST-5)
Location: ZELIENOPLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A 911 Call Center reported trees and branches down.

Flash Flood in ALLEGHENY, PENNSYLVANIA
From 13-AUG-21 19:45:00 to 13-AUG-21 20:55:00 (EST-5)
Location: ASPINWALL
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Lexington and Delafield Road closed due to 1 to 2 feet of water. St. Margaret Drive at the intersection of Freeport Rd closed due to high water.

Flash Flood in VENANGO, PENNSYLVANIA
From 13-AUG-21 21:40:00 to 13-AUG-21 23:00:00 (EST-5)
Location: WALNUT BEND
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reports Cherry Run Creek out of its banks in Cornplanter Township. Bridge washed out. Route 8 also closed from Route 417 to intersection of Route 227.

Flash Flood in MERCER, PENNSYLVANIA
From 13-AUG-21 20:45:00 to 13-AUG-21 22:45:00 (EST-5)
Location: HADLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Highway 258 flooded between Sandy Lake and Greenville by Hadley Road.