Widespread heavy rainfall of 2 to 4 inches produced extensive flooding across Central Pennsylvania for the first three days of December 2010. The heavy rain fell in two distinct periods with the first round of 1-2 inches falling by the evening of November 30th. The second period of heavy rain fell overnight into the afternoon on December 1st. The initial rainfall on the 30th resulted in antecedent conditions that proved to be very favorable for significant flooding. The flooding continued to worsen through the morning of the 1st and reached a pinnacle during the afternoon and evening on the 2nd before stream levels and flood waters slowly receded into the morning of the 3nd. Cold season hydrologic conditions (non-receptive or partially frozen soils) contributed to enhanced runoff and poor drainage.
Moderate to major flood stages were observed at several river points in the West Branch Susquehanna, Juniata and the headwaters of the Allegheny river basins. The Bald Eagle Creek at Beech Creek Station recorded the third highest crest ever at 14.57 feet. The Clarion River at Ridgway and Johnsonburg recorded the fourth and fifth highest crests ever at 19.21 and 9.72 feet. No injuries or fatalities occurred as a result of the flooding despite numerous water rescues, evacuations and flooded roads.

Flood in MCKEAN, PENNSYLVANIA
From 01-DEC-10 05:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: WETMORE
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced extensive flooding in the Upper Allegheny River Basin. The University of Pittsburgh at Bradford evacuated several dormitories due to nearby flood waters. Flooding along smaller streams and creeks closed numerous state, county and municipal roads. Some of the roads included SR 346 and 446 along Knapp Creek and the Allegheny River in Eldred Township, SR 44 along Oswayo Creek and Bell Run in Ceres Township, SR 1002 (Champlain Hill road) along the Allegheny River in Annin Township, SR 155 along the Portage Creek into Potter County and SR 146 in the Red Mill area. A water rescue was performed at the intersection of Tuna Cross Road and the U.S. 219 underpass. The Emerald Isle Trailer Park was evacuated near Smethport.

Flood in CENTRE, PENNSYLVANIA
From 01-DEC-10 07:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: (PSB)MID ST ARPT PHI
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced significant flooding. The flooding closed several state, county and municipal roads in Howard, Curtain, Liberty, Potter and Gregg Townships. The Borough of Milesburg declared a state of emergency and  evacuated several residents from the Eagle Creek Trailer Park. The major flooding at confluence of Bald Eagle Creek and Moose Run caused extensive flooding in Milesburg. Unionville and Julian were also hit hard by the flooding. Numerous businesses and homes were affected in downtown Milesburg. U.S. Alternate 220 was closed from Skytop Mountain to Unionville. SR 45 westbound from Pine Grove Mills and Dogtown Road in Potter Township were closed. Water rescues were performed along South Eagle Valley Road in Huston Township. Spring Creek in Houserville came out of its banks and flooded nearby areas.

Flood in CLINTON, PENNSYLVANIA
From 01-DEC-10 05:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: KEATING
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced significant flooding. The Bald Eagle Creek at Beach Creek Station had major flooding and recorded its third highest crest ever at 14.47 feet. The West Branch Susquehanna River at Renovo experienced moderate flooding and crested just over 18 feet. The Kettle Creek at Cross Forks was out of its banks and flooded nearby areas. The West Branch Susquehanna River at Lock Haven crested over moderate flood stage just above 24 feet. As a precaution, emergency crews in Lock Haven closed the Jay Street Bridge with flood gates sealing off the Susquehanna River.

Flood in ELK, PENNSYLVANIA
From 01-DEC-10 05:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: HIGHLAND CORNERS
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced extensive flooding. The heavy rainfall over the headwaters of the Allegheny basin caused the Clarion River to rise into moderate flood stage at Johnsonburg and Ridgway, cresting at 9.72 and 19.21 feet respectively. Both crests were in the top five all-time. The Main Street bridge in Ridgway was impassable. Numerous state, county and municipal roads were closed with many residents affected along Penn Avenue. Several basements were flooded with up to 5 feet of water. SR 948 and and SR 66 were closed along Spring Creek.

Flood in CAMERON, PENNSYLVANIA
From 01-DEC-10 05:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: LAWN VIEW
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced extensive flooding. Dozens of state, county and municipal roads were closed. Numerous basements were flooded. The Stevenson Dam was closely monitored for potential flooding as the with pool elevation approached (but crested short of) 1000 feet.

Flood in LYCOMING, PENNSYLVANIA
From 01-DEC-10 07:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: JERSEY SHR
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced significant flooding. The West Branch Susquehanna at Montgomery, Muncy and Williamsport crested over moderate flood stage. Little Pine Creek at Waterville came out of its banks and flooded nearby areas. Many roads were impassable in Muncy with water surrounding several homes. Other road closures included  SR 2012 (Sylvan Dell Road) along the West Branch Susquehanna from Charles Street in South Williamsport to Sylvan Park Road in Armstrong Township, SR 4001 (Little Pine Creek Road) in Pine and Cummings Townships, and SR 44, 287 and 87 along Little Pine Creek and Mill Creek near Montoursville.

Flood in HUNTINGDON, PENNSYLVANIA
From 01-DEC-10 07:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: SPRUCE CREEK
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced significant flooding. The Little Juniata River at Spruce Creek crested just over 11 feet resulting in moderate flooding. The Aughwick Creek at Shirleysburg also crested over moderate flood stage just over 12 feet.

Flood in UNION, PENNSYLVANIA
From 01-DEC-10 07:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: WEST MILTON
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches caused widespread flooding. The West Branch Susquehanna River at Milton crested over moderate flood stage at just under 23 feet.

Flood in NORTHUMBERLAND, PENNSYLVANIA
From 01-DEC-10 07:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: WATSONTOWN
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rainfall amounts between 2 and 4 inches produced significant flooding. The West Branch of the Susquehanna River at Milton crested in the moderate flood category, while the crest at Watsontown was lower in the minor category. Several roads were closed as a result of the flooding including SR 405 between SR 17 and 45 in West Chillisquaque Township, Housels Run Road, SR 1007 (Susquehanna Trail) in Turbot Township and SR 1014 (Brimmer Avenue) in Watsontown.

Flood in BLAIR, PENNSYLVANIA
From 01-DEC-10 07:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: PUZZLETOWN
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produce widespread flooding. The Frankstown Branch of the Juniata River at Williamsburg crested over major flood stage at 15.27 feet. Juniata Valley Road in Frankstown Township was closed between SR 22 from Canoe Creek to Geeseytown. Kettle Road in Tyrone was closed from Golf Course Road to Hileman Road. Several secondary roads were also flooded in Antis Township.

Flood in CLEARFIELD, PENNSYLVANIA
From 01-DEC-10 05:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: SABULA
Flood cause: Heavy Rain
Property damage: 200.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced extensive aerial and river flooding. Dozens of state, county and municipal roads were closed. Numerous basements were flooded. The West Branch Susquehanna at Mahaffey came out of its banks and flooded nearby areas.

Flood in POTTER, PENNSYLVANIA
From 01-DEC-10 05:00:00 to 03-DEC-10 07:00:00 (EST-5)
Location: SHINGLEHOUSE
Flood cause: Heavy Rain
Property damage: 800.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Rainfall amounts between 2 and 4 inches produced extensive flooding. The flooding closed numerous state, county and municipal roads including portions of SR 6. Flood waters spilled into first-floor buildings in downtown Coudersport. Numerous basements were flooded. Water rescues was performed at 163 Summit Street in Austin Borough along Freeman's Run and at C & S Lumber in Roulette along the Allegheny River. Flooding was reported along Reeds Run Road, Railroad Avenue, Main Street, Fishing Creek and Lananger Creek in the Roulette area. Evacuations were ordered in West Bingham Township as a result of flooding along the Genesee River.