Warm and humid conditions were in place across western Pennsylvania on June 13th behind a warm front.  After morning showers departed, instability was able to build during the afternoon hours.  A strong shortwave was able to generate high levels of deep layer shear, which allowed for the development of thunderstorms during the afternoon and early evening, a few of which became severe.  Most severe reports were received from Armstrong County, with several reports of tree damage.  Flash flooding occurred here during the evening as well, as multiple storms dropped sufficient rainfall to cause roadway flooding and damage. The severe weather threat ended with a passage of a cold front during the evening.

Flash Flood in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 20:04:00 to 13-JUN-18 21:04:00 (EST-5)
Location: FURNACE RUN
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A state official washed out Montgomery and Tarrtown Road near East Franklin Township.

Flash Flood in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 19:45:00 to 13-JUN-18 20:45:00 (EST-5)
Location: RURAL VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An emergency manager reported that roadway in Rural Valley was flooded and impassable.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 17:20:00 to 13-JUN-18 17:20:00 (EST-5)
Location: WEST KITTANNING
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

County Emergency Manager reported multiple trees down in downtown Kittanning.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 17:21:00 to 13-JUN-18 17:21:00 (EST-5)
Location: KITTANNING
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The county Emergency Manager reported trees on power lines near Indian Hills Road.

Funnel Cloud in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 17:20:00 to 13-JUN-18 17:21:00 (EST-5)
Location: WEST KITTANNING
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A citizen reported a funnel cloud near East Franklin Shopping Center.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 17:30:00 to 13-JUN-18 17:30:00 (EST-5)
Location: WHITESBURG
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An emergency manager reported trees blocking roadway along SR 2007/Frog Pond Road.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 18:15:00 to 13-JUN-18 18:15:00 (EST-5)
Location: MOSGROVE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A state official reported trees blocking roadway near 461 State Route in Boggs Township.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 13-JUN-18 18:30:00 to 13-JUN-18 18:30:00 (EST-5)
Location: JOFFRE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Citizens reported tree limbs down east of Burgettstown.

Flash Flood in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 20:05:00 to 13-JUN-18 21:45:00 (EST-5)
Location: WEST MOSGROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

The road was reported to be washed out at 1227 Tarrtown Road in East Franklin Township.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 17:15:00 to 13-JUN-18 17:15:00 (EST-5)
Location: WEST KITTANNING
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Trees and wires were reported blown down just north of Kittanning.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 17:15:00 to 13-JUN-18 17:15:00 (EST-5)
Location: TARRTOWN
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was reported to be blown down on Tarrtown Road, blocking the roadway.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 13-JUN-18 18:20:00 to 13-JUN-18 18:20:00 (EST-5)
Location: KITTANNING
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A tree was reported to be blown onto power lines along Indian Hills Road.