Several bands of strong to severe thunderstorms developed along two north-south axes of low level confluence across central Pennsylvania into upstate New York. The storms produced large hail, damaging winds and intense short-duration rainfall from the mid afternoon hours through the late evening. The combination of the heavy rain, above normal soil moisture and high stream-flows resulted in significant localized flash flooding in Sullivan County which lasted into the overnight hours.

Flash Flood in SULLIVAN, PENNSYLVANIA
From 26-APR-11 20:45:00 to 27-APR-11 00:45:00 (EST-5)
Location: DUSHORE
Flood cause: Heavy Rain
Property damage: 1.83M
Crop damage: 0.00K
Reported by: Emergency Manager

A flash flood brought widespread damage to the town of Dushore.  Numerous roads were closed.  Several homes were damaged due to high water.  Two water rescues were performed in Cherry and Colley Townships.  German Street Bridge, SR 220 was damaged from flood waters.  About 30 residents were displaced due to flooding in downtown Dushore.  Two feet of water was estimated in downtown Dushore.

Thunderstorm Wind in CAMBRIA, PENNSYLVANIA
From 26-APR-11 14:36:00 to 26-APR-11 14:36:00 (EST-5)
Location: (JST)JOHNSTOWN ARPT
Magnitude: 53.00 MG
Crop damage: 0.00K
Reported by: ASOS

KJST ASOS measured a peak thunderstorm wind gust of 53 knots or 61 mph.

Hail in BLAIR, PENNSYLVANIA
From 26-APR-11 15:40:00 to 26-APR-11 15:40:00 (EST-5)
Location: TYRONE
Magnitude: 1.00 
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CAMBRIA, PENNSYLVANIA
From 26-APR-11 14:53:00 to 26-APR-11 14:53:00 (EST-5)
Location: EBENSBURG
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 Cambria and Croyle Townships.

Thunderstorm Wind in CAMBRIA, PENNSYLVANIA
From 26-APR-11 16:45:00 to 26-APR-11 16:45:00 (EST-5)
Location: BARNESBORO
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees in Susquehanna Township near Northern Cambria.

Hail in CLINTON, PENNSYLVANIA
From 26-APR-11 17:15:00 to 26-APR-11 17:15:00 (EST-5)
Location: LOCK HAVEN
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Public

Hail in CLINTON, PENNSYLVANIA
From 26-APR-11 17:15:00 to 26-APR-11 17:15:00 (EST-5)
Location: LOCK HAVEN
Magnitude: 2.00 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLINTON, PENNSYLVANIA
From 26-APR-11 17:15:00 to 26-APR-11 17:15:00 (EST-5)
Location: LOCK HAVEN
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLINTON, PENNSYLVANIA
From 26-APR-11 17:15:00 to 26-APR-11 17:15:00 (EST-5)
Location: LOCK HAVEN
Magnitude: 1.75 
Property damage: 2.50K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball size hail (1.75 inch diameter) broke numerous windows in Lock Haven.

Thunderstorm Wind in CLINTON, PENNSYLVANIA
From 26-APR-11 17:15:00 to 26-APR-11 17:15:00 (EST-5)
Location: LOCK HAVEN
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 and utility wires in Lock Haven.

Hail in CLINTON, PENNSYLVANIA
From 26-APR-11 17:25:00 to 26-APR-11 17:25:00 (EST-5)
Location: LOCK HAVEN MEM ARPT
Magnitude: 1.00 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Quarter size hail (1 inch diameter) damaged cars on U.S. 220.

Thunderstorm Wind in CLINTON, PENNSYLVANIA
From 26-APR-11 17:25:00 to 26-APR-11 17:25:00 (EST-5)
Location: WOOLRICH
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm winds estimated near 60 mph uprooted 6-8 large trees resulting in power outages in Woolrich.

Thunderstorm Wind in BLAIR, PENNSYLVANIA
From 26-APR-11 17:50:00 to 26-APR-11 17:50:00 (EST-5)
Location: (AOO)BLAIR CO ARPT A
Magnitude: 52.00 MG
Crop damage: 0.00K
Reported by: ASOS

KAOO ASOS measured a peak thunderstorm wind gust of 52 knots or 60 mph.

Thunderstorm Wind in MIFFLIN, PENNSYLVANIA
From 26-APR-11 19:00:00 to 26-APR-11 19:00:00 (EST-5)
Location: LEWISTOWN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph damaged a barn and silo in Lewistown.

Thunderstorm Wind in UNION, PENNSYLVANIA
From 26-APR-11 19:30:00 to 26-APR-11 19:30:00 (EST-5)
Location: MIFFLINBURG
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees in Mifflinburg. The downed trees resulted in power outages.

Thunderstorm Wind in MONTOUR, PENNSYLVANIA
From 26-APR-11 19:55:00 to 26-APR-11 19:55:00 (EST-5)
Location: WASHINGTONVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees in Washingtonville.

Thunderstorm Wind in LEBANON, PENNSYLVANIA
From 26-APR-11 22:15:00 to 26-APR-11 22:15:00 (EST-5)
Location: FREDERICKSBURG
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm winds estimated near 60 mph produced structural damage and knocked down multiple trees on Mountain Drive near Forest Drive and North Mechanic Street just north of Fredricksburg.

Thunderstorm Wind in CAMBRIA, PENNSYLVANIA
From 26-APR-11 14:40:00 to 26-APR-11 14:40:00 (EST-5)
Location: DAISYTOWN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

Thunderstorm winds estimated near 60 mph knocked down trees along Frankstown Road just east of Johnstown.