Heat and humidity was in place across western Pennsylvania underneath a strong ridge, which allowed instability to build during the afternoon of June 18th.  Thunderstorms initially formed on a lake breeze boundary off of Lake Erie and dropped southeastward across areas north of Pittsburgh, resulting in a few wind damage events in Clarion and Jefferson Counties.  A second round of storms formed along a cold front and dropped in a similar fashion across western Pennsylvania, again resulting in some wind damage reports northeast of Pittsburgh.  The storms diurnally weakened thereafter, with the severe weather threat over by midnight.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 18-JUN-18 14:00:00 to 18-JUN-18 14:00:00 (EST-5)
Location: SIX PTS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: State Official

The county emergency manager reported a tree and wires were blown down onto Route 58 east of Eau Claire, with the road closed as a result.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 18-JUN-18 14:07:00 to 18-JUN-18 14:07:00 (EST-5)
Location: PARKER CITY
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: 911 Call Center

County 911 offficials reported trees blown down on North Riverview Drive.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 18-JUN-18 14:22:00 to 18-JUN-18 14:22:00 (EST-5)
Location: CLARION CO ARPT
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: 911 Call Center

County 911 officials reported that trees were blown down on Beaver Furnace Road.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 18-JUN-18 14:25:00 to 18-JUN-18 14:25:00 (EST-5)
Location: LIMESTONE
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: 911 Call Center

County 911 officials reported that trees were blown down on East Reidsburg Road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 18-JUN-18 15:08:00 to 18-JUN-18 15:08:00 (EST-5)
Location: BIG RUN
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: State Official

County 911 officials reported single trees blown down on both Aloe Park Road and at the intersection of West Main Stree and Watts Street.

Thunderstorm Wind in FOREST, PENNSYLVANIA
From 18-JUN-18 19:55:00 to 18-JUN-18 19:55:00 (EST-5)
Location: EAST HICKORY
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

County law enforcement reported that trees were blown down on Fleming Hill Road.

Thunderstorm Wind in FOREST, PENNSYLVANIA
From 18-JUN-18 20:09:00 to 18-JUN-18 20:09:00 (EST-5)
Location: TIONESTA
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

County 911 officials reported that trees blown onto power lines along Faulkner Drive.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 18-JUN-18 20:45:00 to 18-JUN-18 20:45:00 (EST-5)
Location: NORTH PINE GROVE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

County 911 officials reported a large tree and power lines were blown down on Greenwood Road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 18-JUN-18 21:17:00 to 18-JUN-18 21:17:00 (EST-5)
Location: SIGEL
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Law Enforcement

County law enforcement reported that trees were blown down on the northwest side of Sigel.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 18-JUN-18 21:35:00 to 18-JUN-18 21:35:00 (EST-5)
Location: REYNOLDSVILLE
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The Reynoldsville Fire Department reported trees blown down in the Reynoldsville Area, including one on Point View Road.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 18-JUN-18 21:36:00 to 18-JUN-18 21:36:00 (EST-5)
Location: PARKER CITY
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: 911 Call Center

County 911 officials reported that trees were blown down on North Riverview Drive.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 18-JUN-18 22:12:00 to 18-JUN-18 22:12:00 (EST-5)
Location: MAHONING
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: State Official

County 911 officials reported that a tree and utility lines were blown down, blocking Ridge Road.