Showers and thunderstorms developed in a warm and humid airmass over central Pennsylvania with moderate CAPE and very little CIN ahead of an approaching cold front. A few of the storms produced sporadic wind damage, and the widespread nature of this activity allowed the event to evolve into a flash flooding threat as well.

Thunderstorm Wind in DAUPHIN, PENNSYLVANIA
From 09-JUL-23 09:48:00 to 09-JUL-23 09:48:00 (EST-5)
Location: LENKERVILLE
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 trees across Route 147 near the VFW north of Millersburg.

Thunderstorm Wind in NORTHUMBERLAND, PENNSYLVANIA
From 09-JUL-23 11:01:00 to 09-JUL-23 11:01:00 (EST-5)
Location: SEVEN PTS
Magnitude: 52.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: State Official

A garage roof blew off and struck a propane tank along Plum Creek Road to the east of Sunbury.

Thunderstorm Wind in MIFFLIN, PENNSYLVANIA
From 09-JUL-23 13:10:00 to 09-JUL-23 13:10:00 (EST-5)
Location: HIGHLAND PARK
Magnitude: 52.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: State Official

A severe thunderstorm producing winds estimated near 60 mph knocked down approximately 15 large trees across railroad tracks to the east of Lewistown, causing the delay of an Amtrak  passenger train for an hour while the trees were removed.

Thunderstorm Wind in LANCASTER, PENNSYLVANIA
From 09-JUL-23 14:28:00 to 09-JUL-23 14:28:00 (EST-5)
Location: BEARTOWN
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 to the east of Churchtown.

Thunderstorm Wind in PERRY, PENNSYLVANIA
From 09-JUL-23 09:12:00 to 09-JUL-23 09:12:00 (EST-5)
Location: MILLERSTOWN
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

A severe thunderstorm producing winds estimated near 60 mph knocked down trees onto Sugar Run Road and adjacent railroad tracks near Millerstown.

Flood in JUNIATA, PENNSYLVANIA
From 09-JUL-23 12:00:00 to 09-JUL-23 13:00:00 (EST-5)
Location: THOMPSONTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rainfall of 2-3 inches caused ponding of water over railroad tracks between Thompsontown and Millerstown.

Flash Flood in NORTHUMBERLAND, PENNSYLVANIA
From 09-JUL-23 11:00:00 to 09-JUL-23 12:30:00 (EST-5)
Location: SUNBURY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Heavy rainfall estimated around 3 inches led to the closure of Brush Valley Road between Schock and Tressler roads in Rockefeller Township due to flash flooding.

Flash Flood in NORTHUMBERLAND, PENNSYLVANIA
From 09-JUL-23 11:00:00 to 09-JUL-23 12:30:00 (EST-5)
Location: SUNBURY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall estimated around 3 inches led to the closure of Route 61 between Highland Avenue in Sunbury and Green Street in Upper Augusta Township due to flash flooding.

Flash Flood in JUNIATA, PENNSYLVANIA
From 09-JUL-23 10:45:00 to 09-JUL-23 11:45:00 (EST-5)
Location: WALNUT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Heavy rain led to the washout of a roadway between Tuscarora Township and Mifflintown.

Flash Flood in NORTHUMBERLAND, PENNSYLVANIA
From 09-JUL-23 12:00:00 to 09-JUL-23 12:30:00 (EST-5)
Location: SEVEN PTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Heavy rainfall estimated around 3 inches caused flash flooding east of Sunbury, with emergency responders conducting a water rescue on Plum Creek Road.

Flash Flood in JUNIATA, PENNSYLVANIA
From 09-JUL-23 12:00:00 to 09-JUL-23 13:30:00 (EST-5)
Location: THOMPSONTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Heavy rainfall led to flash flooding of roads, a park, and a residential area in Thompsontown. There was also damage to the local fire station that included the kitchen, restroom, a meeting room, and a truck bay.

Thunderstorm Wind in PERRY, PENNSYLVANIA
From 10-JUL-23 09:45:00 to 10-JUL-23 09:46:00 (EST-5)
Location: LIVERPOOL
Magnitude: 83.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A severe thunderstorm produced a downburst just north of Liverpool on the morning of July 9, with winds estimated between 85 and 95 mph. Dozens of trees were uprooted or snapped, and areas of knee-high corn were disrupted in this rural part of Perry County, PA. The path length of the downburst was less than a quarter of a mile, with a maximum path width of approximately 125 yards.

Thunderstorm Wind in PERRY, PENNSYLVANIA
From 09-JUL-23 09:15:00 to 09-JUL-23 09:15:00 (EST-5)
Location: MILLERSTOWN
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires onto Route 322 near mile marker 215.2 at Millerstown.