Scattered showers and storms developed in a very warm and very humid airmass over central Pennsylvania during the afternoon of August 13, 2021, well ahead of an approaching cold front over the eastern Great Lakes. Several of these storms produced wind damage, particularly a cluster of storms that pushed eastward from the southern Alleghenies into the Lower Susquehanna Valley.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 13-AUG-21 13:45:00 to 13-AUG-21 13:45:00 (EST-5)
Location: GREENCASTLE
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down wires in Greencastle.

Thunderstorm Wind in DAUPHIN, PENNSYLVANIA
From 13-AUG-21 15:00:00 to 13-AUG-21 15:00:00 (EST-5)
Location: PAXTANG
Magnitude: 52.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree that went through the roof of a home in Paxtang.

Thunderstorm Wind in DAUPHIN, PENNSYLVANIA
From 13-AUG-21 15:00:00 to 13-AUG-21 15:00:00 (EST-5)
Location: WEST END
Magnitude: 52.00 EG
Property damage: 7.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees in Harrisburg.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 13-AUG-21 15:48:00 to 13-AUG-21 15:48:00 (EST-5)
Location: BROGUE
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down wires west of Brogue.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 13-AUG-21 15:32:00 to 13-AUG-21 15:32:00 (EST-5)
Location: NORTH YORK
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down wires in the city of York.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 13-AUG-21 15:50:00 to 13-AUG-21 15:50:00 (EST-5)
Location: NEW FREEDOM
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree onto a home near New Freedom.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 13-AUG-21 15:50:00 to 13-AUG-21 15:50:00 (EST-5)
Location: BONNAIR
Magnitude: 52.00 EG
Property damage: 9.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees in the vicinity of New Freedom.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 13-AUG-21 14:46:00 to 13-AUG-21 14:46:00 (EST-5)
Location: ROSSVILLE
Magnitude: 52.00 EG
Property damage: 9.00K
Crop damage: 0.00K
Reported by: Utility Company

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and produced multiple power outages in the vicinity of Wellsville and Rossville.

Thunderstorm Wind in CUMBERLAND, PENNSYLVANIA
From 13-AUG-21 14:24:00 to 13-AUG-21 14:24:00 (EST-5)
Location: CARLISLE SPGS
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees and produced damage in the Regency Woods Mobile Home Park west of Wertzville.

Thunderstorm Wind in LYCOMING, PENNSYLVANIA
From 13-AUG-21 16:01:00 to 13-AUG-21 16:01:00 (EST-5)
Location: PICTURE ROCKS
Magnitude: 52.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires in Mill Creek, Wolf and Penn townships.

Thunderstorm Wind in LYCOMING, PENNSYLVANIA
From 13-AUG-21 16:32:00 to 13-AUG-21 16:32:00 (EST-5)
Location: LAIRDSVILLE
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees in Penn Township near the Franklin Township line.

Thunderstorm Wind in PERRY, PENNSYLVANIA
From 13-AUG-21 14:45:00 to 13-AUG-21 14:45:00 (EST-5)
Location: LIVERPOOL
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Utility Company

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires west of Liverpool.

Thunderstorm Wind in ADAMS, PENNSYLVANIA
From 13-AUG-21 15:02:00 to 13-AUG-21 15:02:00 (EST-5)
Location: LITTLESTOWN
Magnitude: 52.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph blew the roof off of a home east of Littlestown.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 13-AUG-21 13:40:00 to 13-AUG-21 13:40:00 (EST-5)
Location: WILLIAMSON
Magnitude: 52.00 EG
Property damage: 9.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph produced multiple reports of trees and wires down west of Greencastle.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 13-AUG-21 13:42:00 to 13-AUG-21 13:42:00 (EST-5)
Location: FIVE FORKS
Magnitude: 52.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm producing winds estimated near 60 mph knocked down at least eight trees across Fort Stouffer Road west of Five Forks, making the road impassable.

Thunderstorm Wind in LYCOMING, PENNSYLVANIA
From 13-AUG-21 16:20:00 to 13-AUG-21 16:20:00 (EST-5)
Location: HUGHESVILLE
Magnitude: 52.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 60 mph knocked down several trees in Hughesville.