High CAPE (>2500 J/kg) and strong speed and directional shear contributed to a significant severe weather episode across south-central Pennsylvania during the afternoon and evening of August 7, 2023. Of note, a significant bow echo produced widespread wind damage and a trio of weak (EF0-EF1) tornadoes across southern York and Lancaster Counties.

Thunderstorm Wind in ADAMS, PENNSYLVANIA
From 07-AUG-23 15:49:00 to 07-AUG-23 15:49:00 (EST-5)
Location: GREENMOUNT
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing estimated winds near 60mph knocked down trees onto Route 15 east of Greenmount.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:02:00 to 07-AUG-23 16:02:00 (EST-5)
Location: BANDANA
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree across Baltimore Pike south of Parkville, blocking the road.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:17:00 to 07-AUG-23 16:17:00 (EST-5)
Location: SHREWSBURY
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 60 mph knocked down trees in Shrewsbury, with one falling onto a vehicle and causing one injury.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:20:00 to 07-AUG-23 16:20:00 (EST-5)
Location: STEWARTSTOWN
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 70 mph produced numerous reports of trees down and widespread damage in Stewartstown.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:04:00 to 07-AUG-23 16:04:00 (EST-5)
Location: BLACKROCK
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm producing winds estimated near 70 mph knocked down numerous trees and powerlines in the Black Rock area.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:23:00 to 07-AUG-23 16:23:00 (EST-5)
Location: CROSS RDS
Magnitude: 65.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 75 mph knocked down produced significant damage, including structural damage, on the 14000 block of Sally Ann Road near Cross Roads.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 07-AUG-23 16:38:00 to 07-AUG-23 16:38:00 (EST-5)
Location: BETHESDA
Magnitude: 65.00 EG
Property damage: 60.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm producing winds estimated near 75 mph produced multiple reports of roofs off of buildings east of Holtwood.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:27:00 to 07-AUG-23 16:27:00 (EST-5)
Location: GATCHELLVILLE
Magnitude: 65.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 75 mph knocked down numerous trees, blocking several roadways north of Fawn Grove.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 07-AUG-23 16:40:00 to 07-AUG-23 16:40:00 (EST-5)
Location: TRUCE
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 70 mph knocked down a tree onto a home and a barn was also damaged by the wind.

Thunderstorm Wind in NORTHUMBERLAND, PENNSYLVANIA
From 07-AUG-23 16:14:00 to 07-AUG-23 16:14:00 (EST-5)
Location: ELYSBURG
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 onto wires north of Elysburg.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 07-AUG-23 16:12:00 to 07-AUG-23 16:12:00 (EST-5)
Location: BUCKHORN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees north of Bloomsburg.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:20:00 to 07-AUG-23 16:20:00 (EST-5)
Location: SEVEN VLYS
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 60 mph snapped 3 inch diameter tree limbs, and snapped power poles.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 07-AUG-23 16:41:00 to 07-AUG-23 16:41:00 (EST-5)
Location: ROARING CREEK
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 60 mph knocked down snapped limbs and power lines south of Bloomsburg.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:20:00 to 07-AUG-23 16:20:00 (EST-5)
Location: NEW SALEM
Magnitude: 61.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm producing winds estimated near 70 mph knocked down several trees and large limbs near New Salem.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:18:00 to 07-AUG-23 16:18:00 (EST-5)
Location: HAMETOWN
Magnitude: 61.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 70 mph blew the roof off of a pole barn and blew a garage door in.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:18:00 to 07-AUG-23 16:18:00 (EST-5)
Location: RINELY
Magnitude: 65.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A severe thunderstorm producing winds estimated near 75 mph knocked down high tension power lines north of Stewartstown.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:31:00 to 07-AUG-23 16:31:00 (EST-5)
Location: LOGANVILLE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree, completely blocking Park Street between Brighton Drive and Ness Court in Loganville.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:40:00 to 07-AUG-23 16:40:00 (EST-5)
Location: GLATFELTERS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm producing winds estimated near 70 mph knocked down multiple trees across Springfield Township.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:23:00 to 07-AUG-23 16:23:00 (EST-5)
Location: LAUREL
Magnitude: 70.00 EG
Property damage: 45.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 80 mph produced extensive tree damage with trees uprooted and snapped. A considerable amount of tree damage was strewn across roadways. Additionally, a chicken coop was crushed and a sheet metal barn had it's roof partially torn off. The duration of the strong winds was more than 5 minutes.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:18:00 to 07-AUG-23 16:18:00 (EST-5)
Location: HAMETOWN
Magnitude: 70.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 80 mph uprooted and snapped multiple trees along Harvey Court north of Shrewsbury, with tree debris across the roadway.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:31:00 to 07-AUG-23 16:31:00 (EST-5)
Location: BRYANSVILLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm producing winds estimated near 60 mph produced isolated tree damage and knocked down large (3 inch diameter) limbs to the east of Susquehanna Trails.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 07-AUG-23 16:45:00 to 07-AUG-23 16:45:00 (EST-5)
Location: TRUCE
Magnitude: 65.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 75 mph knocked down trees in a yard and produced a lot of tree debris in the yard and adjacent roadway. The duration of the strong winds was nearly 5 minutes.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:40:00 to 07-AUG-23 16:40:00 (EST-5)
Location: SLATE HILL
Magnitude: 61.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm producing winds estimated near 70 mph knocked down trees, causing considerable damage to a home east of Susquehanna Trails.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 07-AUG-23 16:27:00 to 07-AUG-23 16:27:00 (EST-5)
Location: CROSS RDS
Magnitude: 61.00 EG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm producing winds estimated near 70 mph snapped or uprooted more than 20 trees mostly soft wood trees, some 50-60 feet in height.

Flood in UNION, PENNSYLVANIA
From 07-AUG-23 15:45:00 to 07-AUG-23 16:45:00 (EST-5)
Location: LEWISBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Flooding caused possible damage to the Loomis Street Bridge in Lewisburg.

Flood in UNION, PENNSYLVANIA
From 07-AUG-23 15:45:00 to 07-AUG-23 16:45:00 (EST-5)
Location: LEWISBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Flooding caused possible damage to the a bridge on Turtle Creek Road near in Lewisburg.

Flood in UNION, PENNSYLVANIA
From 07-AUG-23 15:45:00 to 07-AUG-23 16:45:00 (EST-5)
Location: WINFIELD
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Flooding led to a washed out culvert on Felmey Road near Winfield, closing the road until repairs can be made.

Thunderstorm Wind in UNION, PENNSYLVANIA
From 07-AUG-23 15:09:00 to 07-AUG-23 15:11:00 (EST-5)
Location: WINFIELD
Magnitude: 65.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A severe thunderstorm moved across southern Union County on the afternoon of August 7th, 2023. This thunderstorm caused a swath of straight line wind damage in Union Township just south of State Route 304. Damage began roughly 150 yards south of Route 304 in a wooded area where several trees were snapped or uprooted. The
storm then moved across Amish Rd and destroyed an outbuilding. Several trees were also snapped or uprooted in the vicinity of the outbuilding. Tree damage extended to a wooded area along Felmey Rd as well. The trees were largely laying in the same direction as was debris from the damaged outbuilding, consistent with straight
line wind damage.

Flood in UNION, PENNSYLVANIA
From 07-AUG-23 15:45:00 to 07-AUG-23 16:45:00 (EST-5)
Location: LINNTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Flooding led to the closing of roads in Lewisburg, as Limestone Run left it's banks in the vicinity of 15th Street and Saint Mary's Street.

Flood in UNION, PENNSYLVANIA
From 07-AUG-23 15:30:00 to 07-AUG-23 16:30:00 (EST-5)
Location: SWENGEL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Water flowing across the roadway led to the closure of Route 45 west of Mifflinburg.

Hail in FRANKLIN, PENNSYLVANIA
From 07-AUG-23 12:57:00 to 07-AUG-23 12:57:00 (EST-5)
Location: FT LOUDON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced quarter-sized hail near Fort Loudon.

Hail in FRANKLIN, PENNSYLVANIA
From 07-AUG-23 13:08:00 to 07-AUG-23 13:08:00 (EST-5)
Location: RICHMOND FURNACE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced golf ball sized hail near Metal.

Hail in CENTRE, PENNSYLVANIA
From 07-AUG-23 13:42:00 to 07-AUG-23 13:42:00 (EST-5)
Location: CENTRE HALL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

A severe thunderstorm produced quarter-sized hail on the northwest side of Centre Hall.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 07-AUG-23 12:36:00 to 07-AUG-23 12:36:00 (EST-5)
Location: FT LOUDON
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down power poles and trees across Path Valley Road and Main Street in Fort Loudon.

Thunderstorm Wind in CENTRE, PENNSYLVANIA
From 07-AUG-23 13:06:00 to 07-AUG-23 13:06:00 (EST-5)
Location: STORMSTOWN
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 a tree across Halfmoon Valley Road southwest of Stormstown.

Thunderstorm Wind in CENTRE, PENNSYLVANIA
From 07-AUG-23 13:18:00 to 07-AUG-23 13:18:00 (EST-5)
Location: STATE COLLEGE
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A severe thunderstorm producing winds estimated near 60 mph knocked down a large tree on the southwestern end of State College.

Thunderstorm Wind in SOMERSET, PENNSYLVANIA
From 07-AUG-23 13:16:00 to 07-AUG-23 13:16:00 (EST-5)
Location: MEYERSDALE
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

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

Thunderstorm Wind in BEDFORD, PENNSYLVANIA
From 07-AUG-23 13:57:00 to 07-AUG-23 13:57:00 (EST-5)
Location: CLEARVILLE
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 multiple trees around Clearville.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 07-AUG-23 13:44:00 to 07-AUG-23 13:44:00 (EST-5)
Location: TOMSTOWN
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm producing winds estimated near 60 mph knocked down multiple trees along Anthony Highway south of Quincy.

Thunderstorm Wind in FULTON, PENNSYLVANIA
From 07-AUG-23 14:09:00 to 07-AUG-23 14:09:00 (EST-5)
Location: STONEYBREAK
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees across Mallard Run Road east of Buck Valley.

Thunderstorm Wind in FULTON, PENNSYLVANIA
From 07-AUG-23 14:10:00 to 07-AUG-23 14:10:00 (EST-5)
Location: EMMAVILLE
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 road signs and blew them across Interstate 70 south of Crystal Spring.

Thunderstorm Wind in FRANKLIN, PENNSYLVANIA
From 07-AUG-23 14:50:00 to 07-AUG-23 14:50:00 (EST-5)
Location: CHAMBERSBURG
Magnitude: 52.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires throughout Hamilton Township.

Thunderstorm Wind in MIFFLIN, PENNSYLVANIA
From 07-AUG-23 14:31:00 to 07-AUG-23 14:31:00 (EST-5)
Location: REEDSVILLE ARPT
Magnitude: 43.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A thunderstorm producing winds estimated near 50 mph knocked down tree limbs that fell onto and destroyed a chicken coop north-northeast of Woodland.

Thunderstorm Wind in ADAMS, PENNSYLVANIA
From 07-AUG-23 14:50:00 to 07-AUG-23 14:50:00 (EST-5)
Location: IRISHTOWN
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree across Red Hill Road southeast of New Oxford.