A nearly stationary front remained to the north of the region on July 7th. An upper trough dug across the Great Lakes during the daytime hours as well. While better upper-level forcing remained to the north, return flow increased between this trough and the tropical system Elsa to the southeast. An abundant amount of moisture and warm air was thus funneled into our region.  Deep-layer shear was weak, but enough instability and dry air aloft was present to promote many instances of damaging wind gusts.  Damage to trees and power poles was fairly widespread, and there were a few instances of structural damage as well.  Planes were overturned by wind at Butler Airport, and Edgewood Borough declared a local state of emergency due to thunderstorm wind damage.
Multiple rounds of thunderstorms also lead to flash flooding concerns in the urbanized areas of Allegheny County. Several instances of stuck vehicles were reported, and several homes were evacuated for a time in Bridgeville due to creek flooding.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 07-JUL-21 15:15:00 to 07-JUL-21 15:15:00 (EST-5)
Location: HOMEACRE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Three inch tree limbs were downed.

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 07-JUL-21 15:31:00 to 07-JUL-21 15:31:00 (EST-5)
Location: NEW CASTLE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Several trees were reported to be blown down in New Castle.

Hail in LAWRENCE, PENNSYLVANIA
From 07-JUL-21 15:35:00 to 07-JUL-21 15:35:00 (EST-5)
Location: EAST NEW CASTLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 07-JUL-21 15:36:00 to 07-JUL-21 15:36:00 (EST-5)
Location: EAST BRADY
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Power lines were reported to be blown down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 15:10:00 to 07-JUL-21 15:10:00 (EST-5)
Location: NATRONA HGTS
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Employee

Trees were reported to be blown down on McKean Road.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 07-JUL-21 15:41:00 to 07-JUL-21 15:41:00 (EST-5)
Location: BRADYS BEND
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Social Media

Numerous large tree branches were reported to be snapped.

Hail in LAWRENCE, PENNSYLVANIA
From 07-JUL-21 15:42:00 to 07-JUL-21 15:42:00 (EST-5)
Location: MC OASLIN
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:10:00 to 07-JUL-21 14:10:00 (EST-5)
Location: RANKIN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Trees were reported to be blown down, causing power outages.

Hail in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:15:00 to 07-JUL-21 14:15:00 (EST-5)
Location: BETHEL PARK
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in LAWRENCE, PENNSYLVANIA
From 07-JUL-21 15:42:00 to 07-JUL-21 15:42:00 (EST-5)
Location: MC OASLIN
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Large tree limbs were reported to be blown down.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 07-JUL-21 15:45:00 to 07-JUL-21 15:45:00 (EST-5)
Location: SAGAMORE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large tree limbs and branches were blown down.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 07-JUL-21 14:15:00 to 07-JUL-21 14:15:00 (EST-5)
Location: HENDERSONVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Along Morganza Road, trees were reported to be blown down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:15:00 to 07-JUL-21 14:15:00 (EST-5)
Location: EDGEWOOD
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Trees were reported to be blown down in Regent Square.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 07-JUL-21 16:00:00 to 07-JUL-21 16:00:00 (EST-5)
Location: NEW BETHLEHEM
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Trees were reported to be blown down in New Bethlehem.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 07-JUL-21 16:08:00 to 07-JUL-21 16:08:00 (EST-5)
Location: MERCER
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: State Official

Trees and power lines were reported to be blown down across Mercer County.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:15:00 to 07-JUL-21 14:15:00 (EST-5)
Location: EDGEWOOD
Magnitude: 50.00 EG
Reported by: State Official

Widespread wind damage was reported in Edgewood Boro, resulting in the declaration of a local state of emergency.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:16:00 to 07-JUL-21 14:16:00 (EST-5)
Location: RANKIN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Trees were reported to be blown down in Swissvale.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 07-JUL-21 16:13:00 to 07-JUL-21 16:13:00 (EST-5)
Location: CLARION PARKER ARPT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Power lines were reported to be blown down in Clarion Borough.

Thunderstorm Wind in INDIANA, PENNSYLVANIA
From 07-JUL-21 16:14:00 to 07-JUL-21 16:14:00 (EST-5)
Location: NORTH PT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Power lines were reported to be blown down.

Hail in WASHINGTON, PENNSYLVANIA
From 07-JUL-21 14:19:00 to 07-JUL-21 14:19:00 (EST-5)
Location: LAWRENCE HILLS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:25:00 to 07-JUL-21 14:25:00 (EST-5)
Location: RENTON
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Social Media

In Renton Junction, there was a report of numerous trees being blown down, resulting in power outages.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 07-JUL-21 16:15:00 to 07-JUL-21 16:15:00 (EST-5)
Location: WORTHVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A large tree was reported to be blown down at the intersection of River Road and Main Street.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 07-JUL-21 16:28:00 to 07-JUL-21 16:28:00 (EST-5)
Location: SCOTCH HILL
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: State Official

Trees and power lines were reported to be blown down in Cooksburg.

Flash Flood in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:33:00 to 07-JUL-21 16:30:00 (EST-5)
Location: EDGEWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A few roads were closed due to flooding in Squirrel Hill, with vehicles stranded.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:35:00 to 07-JUL-21 14:35:00 (EST-5)
Location: CHERRY CITY
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

In the neighborhood of Friendship, shingles were blown off of a structure and tree limbs were downed.

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 07-JUL-21 16:22:00 to 07-JUL-21 16:22:00 (EST-5)
Location: SANDY LAKE
Magnitude: 50.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Trees and power lines were reported to be downed around Mercer County.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 16:40:00 to 07-JUL-21 16:40:00 (EST-5)
Location: MILLVALE
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: State Official

Trees and power lines were blown down in Millvale.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:35:00 to 07-JUL-21 14:35:00 (EST-5)
Location: EDGEWOOD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A large tree was blown down along West Swissvale Avenue.

Flash Flood in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:40:00 to 07-JUL-21 16:30:00 (EST-5)
Location: GASCOLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Several vehicles were stuck in high water in the area of both Thompson Run Road and Rodi Road.

Thunderstorm Wind in JEFFERSON, PENNSYLVANIA
From 07-JUL-21 16:45:00 to 07-JUL-21 16:45:00 (EST-5)
Location: REYNOLDSVILLE
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Trees and wires were blown down on South 4th Street.

Thunderstorm Wind in FAYETTE, PENNSYLVANIA
From 07-JUL-21 17:48:00 to 07-JUL-21 17:48:00 (EST-5)
Location: SMITHFIELD
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Morgantown Road was closed for a time due to downed trees.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 07-JUL-21 14:49:00 to 07-JUL-21 14:49:00 (EST-5)
Location: BAGDAD
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Social Media

Trees and power poles were reported to be blown down.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:49:00 to 07-JUL-21 14:49:00 (EST-5)
Location: NATRONA HGTS
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Trees were reported to be blown down in Harrison Township.

Thunderstorm Wind in WASHINGTON, PENNSYLVANIA
From 07-JUL-21 18:20:00 to 07-JUL-21 18:20:00 (EST-5)
Location: THOMAS
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: State Official

Trees and power lines were blown down.  One tree fell on a vehicle, with no injuries reported.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 07-JUL-21 18:28:00 to 07-JUL-21 18:28:00 (EST-5)
Location: SANDY RUN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Trees were reported down across 4th and County Streets.

Hail in ARMSTRONG, PENNSYLVANIA
From 07-JUL-21 14:49:00 to 07-JUL-21 14:49:00 (EST-5)
Location: LEECHBURG
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

The hail was observed in Leechburg via a social media video.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 07-JUL-21 14:49:00 to 07-JUL-21 14:49:00 (EST-5)
Location: MILLIGANTOWN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Snapped trees were reported via social media images on Puckety Church Road.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 07-JUL-21 18:35:00 to 07-JUL-21 18:35:00 (EST-5)
Location: FORDYCE
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A tree was reported to be blown down, blocking Haines Hollow Road.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 07-JUL-21 18:40:00 to 07-JUL-21 18:40:00 (EST-5)
Location: GARRISON
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Multiple telephone poles were blown down along Garrison Ridge Road.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:54:00 to 07-JUL-21 14:54:00 (EST-5)
Location: NATRONA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Social Media

Trees were reported to be blown down in Natrona Heights.

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:54:00 to 07-JUL-21 14:54:00 (EST-5)
Location: SHALECREST
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Social Media

Trees were blown down on to a vehicle in Shaler.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 07-JUL-21 18:47:00 to 07-JUL-21 18:47:00 (EST-5)
Location: NEW FREEPORT
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: State Official

A tree was reported to be downed, blocking Jollytown Road.

Thunderstorm Wind in GREENE, PENNSYLVANIA
From 07-JUL-21 18:50:00 to 07-JUL-21 18:50:00 (EST-5)
Location: GARRISON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Garrison Ridge Road was closed down to downed telephone poles.

Hail in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:54:00 to 07-JUL-21 14:54:00 (EST-5)
Location: SHALECREST
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Thunderstorm Wind in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 14:56:00 to 07-JUL-21 14:56:00 (EST-5)
Location: SHALECREST
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Near Fall Run Park, trees were reported to be uprooted.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 07-JUL-21 19:15:00 to 07-JUL-21 19:15:00 (EST-5)
Location: (LBE)LATROBE ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 07-JUL-21 19:24:00 to 07-JUL-21 19:24:00 (EST-5)
Location: STONEVILLA
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees were blown down in Greensburg.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 07-JUL-21 14:45:00 to 07-JUL-21 14:45:00 (EST-5)
Location: BUTLER GRAHAM ARPT
Magnitude: 50.00 EG
Property damage: 150.00K
Reported by: 911 Call Center

Two airplanes were reported to be overturned by wind at Butler Airport.

Flash Flood in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 15:00:00 to 07-JUL-21 16:30:00 (EST-5)
Location: SYGAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Pinewood and Lakeview Drive were both closed due to flooding, with over 2 feet of running water at the intersection.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 07-JUL-21 15:02:00 to 07-JUL-21 15:02:00 (EST-5)
Location: BUTLER GRAHAM ARPT
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Near Nixon, large tree branches were blown down.

Thunderstorm Wind in WESTMORELAND, PENNSYLVANIA
From 07-JUL-21 19:53:00 to 07-JUL-21 19:53:00 (EST-5)
Location: NEW FLORENCE
Magnitude: 50.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Multiple reports of downed trees were received from around the New Florence area.

Thunderstorm Wind in BUTLER, PENNSYLVANIA
From 07-JUL-21 15:03:00 to 07-JUL-21 15:03:00 (EST-5)
Location: BUTLER GRAHAM ARPT
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Roof damage was done to a home on Mushrush Road.

Flash Flood in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 15:05:00 to 07-JUL-21 15:05:00 (EST-5)
Location: RANKIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Three feet of water completely covered the road at Commercial Boulevard near Swisshelm Park.

Flash Flood in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 15:05:00 to 07-JUL-21 16:30:00 (EST-5)
Location: INGRAM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A vehicle was stuck in rising water on Station Street.

Flash Flood in ALLEGHENY, PENNSYLVANIA
From 07-JUL-21 15:15:00 to 07-JUL-21 16:30:00 (EST-5)
Location: BOWER HILL
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: State Official

McLaughlin Run came out of its banks, causing four homes to be evacuated on Baldwin Street and McLaughlin Run Road.