The remnants of Tropical Storm Lee moved northward from the southern Appalachians on the 6th to the middle Atlantic states on the 7th before stalling on the 8th. The moisture from Lee interacted with a frontal system to the west across the eastern Ohio Valley and eastern Great Lakes. In addition, moisture was drawn into New York and Pennsylvania from Hurricane Katia which was moving northward off the east coast in tandem with the remnants of Lee. This complicated scenario led to an extreme amount of rain for central New York and northeast Pennsylvania, most of which fell over a 48 hour period from the 6th to the 8th. Rainfall of 6 to 12 inches occurred over most of the upper Susquehanna river basin in New York and northeast Pennsylvania. The heavy rain caused massive, record breaking flooding on small streams, creeks and the Susquehanna River and its larger tributaries.
The main branch of the Susquehanna River in New York from Binghamton to Vestal, Owego and Waverly crested from 1 to 4 feet higher than the previous record crests set in June 2006.  In Pennsylvania, record crests occurred along the Susquehanna River at Meshoppen and Wilkes Barre which exceeded the long-standing record crests by around 1 foot associated with Hurricane Agnes in 1972.
Damages in the upper Susquehanna River Basin in New York and Pennsylvania are close to 1 billion dollars. Unfortunately, the flooding claimed 1 life and injured 1 person in central New York and northeast Pennsylvania.

Flash Flood in BRADFORD, PENNSYLVANIA
From 07-SEP-11 13:20:00 to 08-SEP-11 10:00:00 (EST-5)
Location: MONROETON
Flood cause: Heavy Rain / Tropical System
Property damage: 2.00M
Crop damage: 0.00K
Reported by: Public

Catastrophic flash flooding occurred in Monroeton from the Towanda Creek. The levee was destroyed by the flash flooding. Routes 220, 414 and 6 are all closed due to flash flooding. Many homes have been flooded.

Flash Flood in BRADFORD, PENNSYLVANIA
From 07-SEP-11 14:30:00 to 08-SEP-11 10:00:00 (EST-5)
Location: MACEDONIA
Flood cause: Heavy Rain / Tropical System
Property damage: 2.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads were closed in the Towanda area due to flash flooding.

Flood in BRADFORD, PENNSYLVANIA
From 07-SEP-11 12:26:00 to 12-SEP-11 10:30:00 (EST-5)
Location: EAST ATHENS
Flood cause: Heavy Rain / Tropical System
Property damage: 15.30M
Crop damage: 0.00K
Reported by: River/Stream Gage

Record flooding occurred along the Susquehanna River near Sayre and Athens, PA between September 7th and September 12th, 2011. The river crested at 26.67 feet at 4:15 PM on September 8th as determined by a USGS high water mark survey.

Flash Flood in SUSQUEHANNA, PENNSYLVANIA
From 07-SEP-11 08:12:00 to 08-SEP-11 10:00:00 (EST-5)
Location: LITTLE MEADOWS
Flood cause: Heavy Rain / Tropical System
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Catastrophic flash flooding occurred in Little Meadows from very heavy rains. Numerous roads, homes and bridges were severely damaged.

Flash Flood in BRADFORD, PENNSYLVANIA
From 07-SEP-11 10:36:00 to 08-SEP-11 10:00:00 (EST-5)
Location: WINDHAM CENTER
Flood cause: Heavy Rain / Tropical System
Property damage: 3.00M
Crop damage: 0.00K
Reported by: Unknown

Catastrophic flash flooding occurred along Route 187. Numerous roads, homes and bridges were severely damaged. A road collapsed from the flooding.

Flood in BRADFORD, PENNSYLVANIA
From 07-SEP-11 11:12:00 to 08-SEP-11 17:15:00 (EST-5)
Location: POWELL
Flood cause: Heavy Rain / Tropical System
Property damage: 1.00M
Crop damage: 0.00K
Reported by: River/Stream Gage

Record flooding occurred along the Towanda Creek near Monroeton, PA. The river crested at 20.97 feet on September 8, 2011 at 5:15 AM. The previous record of 20.86 feet occurred during the January 1996 rain and snow melt flooding.

Flood in BRADFORD, PENNSYLVANIA
From 07-SEP-11 17:47:00 to 08-SEP-11 21:42:00 (EST-5)
Location: TOWANDA
Flood cause: Heavy Rain / Tropical System
Property damage: 5.00M
Crop damage: 0.00K
Reported by: River/Stream Gage

Major flooding occurred along the Susquehanna River near Towanda, PA. The river crested at 30.52 feet on September 8, 2011 at 10:45 AM.

Flash Flood in WYOMING, PENNSYLVANIA
From 07-SEP-11 11:05:00 to 08-SEP-11 10:00:00 (EST-5)
Location: LOVELTON
Flood cause: Heavy Rain / Tropical System
Property damage: 5.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Catastrophic flash flooding began in Wyoming County in the Mehoopany and Forkston areas. Numerous roads, homes and bridges were severely damaged.

Flood in WYOMING, PENNSYLVANIA
From 07-SEP-11 18:22:00 to 11-SEP-11 02:50:00 (EST-5)
Location: MESHOPPEN
Flood cause: Heavy Rain / Tropical System
Property damage: 20.00M
Crop damage: 0.00K
Reported by: River/Stream Gage

Record flooding occurred along the Susquehanna River near Meshoppen, PA. The river crested at 44.42 feet on September 8, 2011 at 4:15 PM. The previous record of 43.51 feet was from the June 1972 Hurricane Agnes flood.

Flash Flood in SUSQUEHANNA, PENNSYLVANIA
From 07-SEP-11 13:04:00 to 08-SEP-11 10:00:00 (EST-5)
Location: LITTLE MEADOWS
Flood cause: Heavy Rain / Tropical System
Property damage: 0.50M
Crop damage: 0.00K
Reported by: Emergency Manager

National guard was called in to rescue trapped residents due to catastrophic flash flooding.

Flash Flood in BRADFORD, PENNSYLVANIA
From 07-SEP-11 14:30:00 to 08-SEP-11 10:00:00 (EST-5)
Location: WYSOX
Flood cause: Heavy Rain / Tropical System
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Route 6 was closed between Wysox and Wyalusing due to flash flooding.

Flash Flood in SUSQUEHANNA, PENNSYLVANIA
From 07-SEP-11 14:45:00 to 08-SEP-11 10:00:00 (EST-5)
Location: RUSH
Flood cause: Heavy Rain / Tropical System
Property damage: 250.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Many roads were severely flooded. Rescues took place as people were cut off from so many road closures.

Flood in LUZERNE, PENNSYLVANIA
From 08-SEP-11 00:14:00 to 11-SEP-11 12:45:00 (EST-5)
Location: PITTSTON
Flood cause: Heavy Rain / Tropical System
Property damage: 43.50M
Crop damage: 0.00K
Reported by: River/Stream Gage

Record flooding occurred along the Susquehanna River throughout the Wyoming Valley of northeast Pennsylvania. The river crested at Wilkes-Barre at 42.66 feet around 7:00 AM on September 8, 2011 as determined by a USGS high water mark survey. The previous record crest was 40.91 feet which dates back to the June 1972 Hurricane Agnes flood.

Flash Flood in BRADFORD, PENNSYLVANIA
From 07-SEP-11 15:45:00 to 08-SEP-11 10:00:00 (EST-5)
Location: ROME
Flood cause: Heavy Rain / Tropical System
Property damage: 2.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Catastrophic flash flooding occurred in Bradford county.  Routes 220 and 187 and numerous county roads were closed and severely damaged. Several towns were not accessible from the flash flooding. Students were unable to leave Northeast Bradford High School and evacuations took place in several communities.

Flash Flood in LUZERNE, PENNSYLVANIA
From 07-SEP-11 01:34:00 to 08-SEP-11 12:00:00 (EST-5)
Location: PARSONS
Flood cause: Heavy Rain / Tropical System
Property damage: 500.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Widespread urbanized flash flooding began with some evacuations.

Flash Flood in LUZERNE, PENNSYLVANIA
From 07-SEP-11 10:33:00 to 08-SEP-11 10:00:00 (EST-5)
Location: NESOPECK
Flood cause: Heavy Rain / Tropical System
Property damage: 1.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Major flash flooding was reported along the Nescopeck Creek.