A strong mid-level disturbance and associated wind flow combined with a moderately unstable air mass to produce numerous severe thunderstorms over north-central Pennsylvania during the early to late evening hours.  The background convective environment was favorable for rotating thunderstorms or supercells, and an EF1 tornado was confirmed near Galeton in Potter County. There were also multiple reports of damaging winds.

Thunderstorm Wind in CLEARFIELD, PENNSYLVANIA
From 24-JUL-10 20:00:00 to 24-JUL-10 20:00:00 (EST-5)
Location: CLEARFIELD
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees in Clearfield Borough.

Thunderstorm Wind in COLUMBIA, PENNSYLVANIA
From 24-JUL-10 20:45:00 to 24-JUL-10 20:45:00 (EST-5)
Location: BLOOMSBURG
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down a swath of trees in the city of Bloomsburg and Georges Township.

Funnel Cloud in CLEARFIELD, PENNSYLVANIA
From 24-JUL-10 19:40:00 to 24-JUL-10 19:40:00 (EST-5)
Location: SABULA
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A funnel cloud was observed by the public near Treasure Lake.

Thunderstorm Wind in MCKEAN, PENNSYLVANIA
From 24-JUL-10 17:15:00 to 24-JUL-10 17:15:00 (EST-5)
Location: DUKE CENTER
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees in Duke Center at the intersection of Oil Valley Road and Main Street.

Thunderstorm Wind in MCKEAN, PENNSYLVANIA
From 24-JUL-10 17:45:00 to 24-JUL-10 17:45:00 (EST-5)
Location: DEGOLIA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees and wires along Minard Run Road near Custer City.

Thunderstorm Wind in MCKEAN, PENNSYLVANIA
From 24-JUL-10 17:38:00 to 24-JUL-10 17:38:00 (EST-5)
Location: BRADFORD
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees along Congress Street in Bradford.

Thunderstorm Wind in MCKEAN, PENNSYLVANIA
From 24-JUL-10 17:40:00 to 24-JUL-10 17:40:00 (EST-5)
Location: BRADFORD
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees along West Coryden Street in Bradford.

Hail in POTTER, PENNSYLVANIA
From 24-JUL-10 17:50:00 to 24-JUL-10 17:50:00 (EST-5)
Location: BROOKLAND
Magnitude: 1.25 
Reported by: Trained Spotter

Thunderstorm Wind in WARREN, PENNSYLVANIA
From 24-JUL-10 17:10:00 to 24-JUL-10 17:10:00 (EST-5)
Location: TIDIOUTE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees along Youngsville Road north of Tidioute.

Thunderstorm Wind in WARREN, PENNSYLVANIA
From 24-JUL-10 17:10:00 to 24-JUL-10 17:10:00 (EST-5)
Location: RUSSELL SCANDIA ARPT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees along Hultburg Road east of Russell.

Thunderstorm Wind in TIOGA, PENNSYLVANIA
From 24-JUL-10 18:45:00 to 24-JUL-10 18:45:00 (EST-5)
Location: BLACKWELL
Magnitude: 52.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

NWS meteorologists surveyed thunderstorm wind damage in the Blackwell area. They determined that straight-line winds estimated near 60 mph toppled 5-10 utility poles and knocked down numerous trees along SR 414 near the intersection of Wilson Hill Road.

Thunderstorm Wind in CLINTON, PENNSYLVANIA
From 24-JUL-10 19:50:00 to 24-JUL-10 19:50:00 (EST-5)
Location: LOCK HAVEN
Magnitude: 50.00 EG
Property damage: 7.50K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees at the Clinton County Historical Society's Heisey Museum on East Water Street in Lock Haven. Some minor structural damage was also visible.

Thunderstorm Wind in LYCOMING, PENNSYLVANIA
From 24-JUL-10 19:55:00 to 24-JUL-10 19:55:00 (EST-5)
Location: EAST FAXON
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm winds estimated near 60 mph knocked down trees and power lines at the intersection of Washington Blvd and Cathrine Street. Additional trees and wires were down in other parts of the Williasmport area, but locations were not available.

Thunderstorm Wind in LYCOMING, PENNSYLVANIA
From 24-JUL-10 20:00:00 to 24-JUL-10 20:00:00 (EST-5)
Location: LARRYS CREEK
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm winds estimated near 60 mph knocked down trees along SR 287 just north of the intersection of U.S. 220 near Jersey Shore.

Funnel Cloud in POTTER, PENNSYLVANIA
From 24-JUL-10 18:05:00 to 24-JUL-10 18:05:00 (EST-5)
Location: GALETON
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter in Galeton reported a rotating wall cloud with a funnel extending from the cloud base.

Tornado in POTTER, PENNSYLVANIA
From 24-JUL-10 18:05:00 to 24-JUL-10 18:07:00 (EST-5)
Location: GALETON
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

NWS meteorologists confirmed an EF1 tornado approximately 2 miles west-southwest of Galeton, PA in Potter County. The tornado was on the ground for about 2 minutes and had a path length of just over 1 mile. The estimated maximum wind speed was 90 mph based on tree and utility pole damage indicators. The damage occurred in a very rural area with only minor structural damage to a few cabins. The tornado path was slightly curved and extended from a small tributary on the West Branch of Pine Creek across SR 2002. The EF1 tornado destroyed over 1000 trees and up to 10 utility poles along SR 2002. A pump-house that supplies the town of Galeton with water was impacted by power outages resulting from the downed utility poles.

Thunderstorm Wind in CLEARFIELD, PENNSYLVANIA
From 24-JUL-10 19:40:00 to 24-JUL-10 19:40:00 (EST-5)
Location: SABULA
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down trees at Treasure Lake.

Thunderstorm Wind in LYCOMING, PENNSYLVANIA
From 24-JUL-10 18:45:00 to 24-JUL-10 18:45:00 (EST-5)
Location: CEDAR RUN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm winds estimated near 60 mph knocked down numerous trees along SR 414 near Cedar Run, making the road impassable.