A line of strong storms developed along a trailing cold front on the afternoon of June 21st. The environment had MLCAPE values near 2000 J/kg, effective shear near 35kts, and steep low-level lapse rates. A brief embedded tornado developed within the line and crossed into the Seven Fields, PA region. Model hodographs noted this threat prior to occurrence, indicating that storm motion towards the southeast would be ideal for ingesting streamwise vorticity.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 13:51:00 to 21-JUN-21 13:51:00 (EST-5)
Location: WARRENDALE
Magnitude: 60.00 EG
Reported by: NWS Employee

NWS Employee reported large limbs down on Route 19 and near the Interchange of 79/76.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 13:52:00 to 21-JUN-21 13:52:00 (EST-5)
Location: BAYNE
Magnitude: 65.00 EG
Reported by: Public

Two 50 foot trees knocked down.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 21-JUN-21 13:54:00 to 21-JUN-21 13:54:00 (EST-5)
Location: FERNWAY
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Report of numerous trees down around Seven Fields.

Thunderstorm Wind in FOREST, PENNSYLVANIA
From 21-JUN-21 13:57:00 to 21-JUN-21 13:57:00 (EST-5)
Location: TIONESTA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A few trees knocked down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 14:35:00 to 21-JUN-21 14:35:00 (EST-5)
Location: EAST VANDERGRIFT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees down.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 21-JUN-21 14:38:00 to 21-JUN-21 14:38:00 (EST-5)
Location: SPRING CHURCH
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media video of trees falling down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:40:00 to 21-JUN-21 14:40:00 (EST-5)
Location: OPTION
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media reported large tree blocking the Blvd of the Allies.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 15:04:00 to 21-JUN-21 15:04:00 (EST-5)
Location: WHITE OAK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Siding blown off a home.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:45:00 to 21-JUN-21 14:45:00 (EST-5)
Location: CHERRY CITY
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported large tree limbs down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:05:00 to 21-JUN-21 14:05:00 (EST-5)
Location: INGOMAR
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down on Highland Road.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:10:00 to 21-JUN-21 14:10:00 (EST-5)
Location: WEXFORD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Trees down across Warrendale-Bane Road.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:20:00 to 21-JUN-21 14:20:00 (EST-5)
Location: PARKVIEW
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees were reported down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 14:20:00 to 21-JUN-21 14:20:00 (EST-5)
Location: ARNOLD
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Tree fell on a house.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 14:25:00 to 21-JUN-21 14:25:00 (EST-5)
Location: EDGECLIFF
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees down.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 21-JUN-21 13:58:00 to 21-JUN-21 13:58:00 (EST-5)
Location: MAYOMA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree limbs down and shingles blown off a roof.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 21-JUN-21 13:58:00 to 21-JUN-21 13:58:00 (EST-5)
Location: LOVI
Magnitude: 65.00 EG
Reported by: NWS Storm Survey

NWS Survey Team noted several small trees snapped on the top and at least 3 large trees branches down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:01:00 to 21-JUN-21 14:01:00 (EST-5)
Location: WARRENDALE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Several large branches snapped off at least 4 trees.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:01:00 to 21-JUN-21 14:01:00 (EST-5)
Location: BAKERSTOWN STATION
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of tree down on wires.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:05:00 to 21-JUN-21 14:05:00 (EST-5)
Location: SEWICKLEY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Tree and wires down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 13:51:00 to 21-JUN-21 13:51:00 (EST-5)
Location: WARRENDALE
Magnitude: 60.00 EG
Reported by: Public

Over 20 large trees snapped and uprooted.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 21-JUN-21 14:55:00 to 21-JUN-21 14:55:00 (EST-5)
Location: GRAFTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down on Black Lick Road.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 21-JUN-21 15:00:00 to 21-JUN-21 15:00:00 (EST-5)
Location: HOMER CITY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down on home in Center Twp.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 21-JUN-21 15:38:00 to 21-JUN-21 15:38:00 (EST-5)
Location: JACKSONVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down on Hunter School Road.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:07:00 to 21-JUN-21 15:07:00 (EST-5)
Location: PENNS WOODS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down at intersection of Wainwright and Roth Dr.

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

Public reports siding blown off home on State Street.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 21-JUN-21 13:50:00 to 21-JUN-21 13:50:00 (EST-5)
Location: ECONOMY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media reported several trees down.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 21-JUN-21 13:24:00 to 21-JUN-21 13:24:00 (EST-5)
Location: FAIRVIEW
Magnitude: 55.00 EG
Reported by: Social Media

Social media reports trees down and power outages.

Thunderstorm Wind in BEAVER, PENNSYLVANIA
From 21-JUN-21 13:46:00 to 21-JUN-21 13:46:00 (EST-5)
Location: ECONOMY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media reports of trees and large limbs down.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 21-JUN-21 15:39:00 to 21-JUN-21 15:39:00 (EST-5)
Location: BRISTORIA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Power lines down along Bristoria Road.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 21-JUN-21 15:01:00 to 21-JUN-21 15:01:00 (EST-5)
Location: LIMESTONE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 21-JUN-21 18:25:00 to 21-JUN-21 18:25:00 (EST-5)
Location: JACKSONVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees reported down in Center Twp.

Tornado in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 13:53:00 to 21-JUN-21 13:55:00 (EST-5)
Location: WARRENDALE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

An EF0 tornado touched down near the border of Allegheny and
Butler County on the afternoon of June 21st. The damage was to
mostly hardwood trees that started west of the intersection of
Freeport and Mt Pleasant roads. The hardest hit area was near a
playground by the entrance to the Emerald Fields housing
development. This is where six trees were uprooted. Sporadic down
large branches were noted as the tornado tracked southeast toward
Dean Road. There was a large tree that was knocked down as Mt.
Pleasant road turns into Dean Road, but it was rotted. Other
damage in the region including the Pine Community Center was a
result of straight line wind.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 21-JUN-21 13:32:00 to 21-JUN-21 13:32:00 (EST-5)
Location: SUNVILLE
Magnitude: 55.00 EG
Reported by: State Official

Reports of a couple trees down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:10:00 to 21-JUN-21 15:10:00 (EST-5)
Location: DELMONT
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Widespread trees down across the county.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:54:00 to 21-JUN-21 14:54:00 (EST-5)
Location: BRIDGEVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees and wires down on Thoms Run Road at Pinch Road. Thoms Run Road closed.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 21-JUN-21 16:08:00 to 21-JUN-21 16:08:00 (EST-5)
Location: MASONTOWN
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Tree reported down.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 21-JUN-21 15:52:00 to 21-JUN-21 15:52:00 (EST-5)
Location: WHITSETT
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Tree reported down.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 21-JUN-21 15:31:00 to 21-JUN-21 15:31:00 (EST-5)
Location: PALMERTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees reported down.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 21-JUN-21 16:03:00 to 21-JUN-21 16:03:00 (EST-5)
Location: ALEPPO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Multiple trees reported down across the county.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 21-JUN-21 16:15:00 to 21-JUN-21 16:15:00 (EST-5)
Location: JEFFERSON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees and power lines down across Jefferson Twp.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 21-JUN-21 15:28:00 to 21-JUN-21 15:28:00 (EST-5)
Location: MARIANNA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down on power lines.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:22:00 to 21-JUN-21 15:22:00 (EST-5)
Location: GREENSBURG
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported large tree limbs down in Greensburg.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:40:00 to 21-JUN-21 15:40:00 (EST-5)
Location: MENDON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees down across southern Huntingdon Twp.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:40:00 to 21-JUN-21 15:40:00 (EST-5)
Location: CALUMET
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Multiple reports of tree damage across Mt. Pleasant Twp.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 21-JUN-21 15:39:00 to 21-JUN-21 15:39:00 (EST-5)
Location: SIMPSON STORE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down on Walker Hill Road.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 21-JUN-21 15:50:00 to 21-JUN-21 15:50:00 (EST-5)
Location: BRUSH VLY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Power lines and trees down in Bruwh Valley, Armaugh, and Homer City.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:07:00 to 21-JUN-21 15:07:00 (EST-5)
Location: HAHNTOWN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree blown down at corner of Maus and Robbins Station.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 14:30:00 to 21-JUN-21 14:30:00 (EST-5)
Location: BRAEBURN
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

At least twenty trees down on the Tredway Riverfront Trail in Allegheny township.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 21-JUN-21 14:39:00 to 21-JUN-21 14:39:00 (EST-5)
Location: SPRING CHURCH
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media reports trees down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 21-JUN-21 14:46:00 to 21-JUN-21 14:46:00 (EST-5)
Location: CHERRY CITY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported large tree down on 46th Street.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 21-JUN-21 15:00:00 to 21-JUN-21 15:00:00 (EST-5)
Location: PINE CREEK
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Tree reported down on Water Plant Rd.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 21-JUN-21 15:10:00 to 21-JUN-21 15:10:00 (EST-5)
Location: ROSEVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees down on Roseville Sigel Road.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:25:00 to 21-JUN-21 15:25:00 (EST-5)
Location: YOUNDWOOD
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Fire Dept reported large tree down on wires on Depot Street.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:12:00 to 21-JUN-21 15:12:00 (EST-5)
Location: STRAW PUMP
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Public reported a tree down.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 21-JUN-21 14:58:00 to 21-JUN-21 14:58:00 (EST-5)
Location: JACKSONVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Trees reported down on Hunter School Road.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 21-JUN-21 15:48:00 to 21-JUN-21 15:48:00 (EST-5)
Location: ARNOLA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Numerous trees down.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 21-JUN-21 15:57:00 to 21-JUN-21 15:57:00 (EST-5)
Location: BROWNSVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Tree reported down.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 21-JUN-21 14:05:00 to 21-JUN-21 14:05:00 (EST-5)
Location: GABBY HGTS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Tree and wires down.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 21-JUN-21 14:59:00 to 21-JUN-21 14:59:00 (EST-5)
Location: WASHINGTON
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Widespread tree damage across the county.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 21-JUN-21 15:25:00 to 21-JUN-21 15:25:00 (EST-5)
Location: CHEVY CHASE HGTS
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees reported down.