Scattered showers and thunderstorms developed during the afternoon and early evening of July 16, 2021, in a very warm, humid airmass just south of a stalled frontal boundary that was draped across northern Pennsylvania. A few of these storms produced wind damage, including a particularly tall cell that produced winds estimated by a NWS Survey Team to be 85 to 95 mph in a wet microburst near Haneyville in northern Clinton County. Flash flooding from heavy rains also occurred in Northumberland and Sullivan Counties.

Thunderstorm Wind in CLINTON, PENNSYLVANIA
From 16-JUL-21 16:15:00 to 16-JUL-21 16:16:00 (EST-5)
Location: HANEYVILLE
Magnitude: 83.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A severe thunderstorm produced a microburst just north of Haneyville with winds estimated to be 85 to 95 mph. That path length as approximately one mile, running from Coyote Ridge Road across Chickadee Lane and Coudersport Pike (Route 44) before ending near the intersection of Zinck Fork Road and Brown Run Road. The path width was approximately 75 yards. Multiple large trees were knocked down along the path, and one fell onto an unoccupied cabin on Chickadee Lane.

Thunderstorm Wind in MCKEAN, PENNSYLVANIA
From 16-JUL-21 13:28:00 to 16-JUL-21 13:28:00 (EST-5)
Location: PORT ALLEGANY ARPT
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down a utility pole near the intersection of Route 6 and Seneca Drive east of Port Allegheny.

Thunderstorm Wind in POTTER, PENNSYLVANIA
From 16-JUL-21 13:40:00 to 16-JUL-21 13:40:00 (EST-5)
Location: ROULETTE
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree, blocking the intersection of Main Street and School Street in Roulette.

Thunderstorm Wind in CLEARFIELD, PENNSYLVANIA
From 16-JUL-21 15:25:00 to 16-JUL-21 15:25:00 (EST-5)
Location: TROUTVILLE
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree onto wires in Brady Township.

Thunderstorm Wind in CLEARFIELD, PENNSYLVANIA
From 16-JUL-21 15:48:00 to 16-JUL-21 15:48:00 (EST-5)
Location: CLEARFIELD
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down several large limbs near the intersection of Nichols Street and Williams Street in Clearfield.

Flash Flood in NORTHUMBERLAND, PENNSYLVANIA
From 16-JUL-21 16:20:00 to 16-JUL-21 16:45:00 (EST-5)
Location: MC EWENSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash flooding on a small creek brought water across the road at Limestoneville Road and Church Road.

Flash Flood in SULLIVAN, PENNSYLVANIA
From 16-JUL-21 17:24:00 to 16-JUL-21 18:30:00 (EST-5)
Location: ESTELLA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Flash flooding with water covering roads in Forks and Elkland Townships.