A series of thunderstorms with torrential downpours caused small stream and poor drainage flash flooding across northwest New Jersey during the morning of the 28th. Event precipitation totals in the heavier band that extended from northern Hunterdon County northeastward through the border of Sussex and Morris Counties averaged 3 to 5 inches. The runoff from the heavy rain then caused some stream and smaller river flooding in northwest New Jersey that lasted into the 30th.

Flash Flood in WARREN, NEW JERSEY
From 28-SEP-11 06:15:00 to 28-SEP-11 11:00:00 (EST-5)
Location: MARKSBORO
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with heavy downpours caused flash flooding along smaller streams and roadways in eastern Warren County mainly in Allamuchy, Franklin, Hackettstown, Independence and Mansfield Townships. In Franklin Township, residents of the Pohatcong Creek Mobile Home Adult Community were rescued by boat after that creek flooded.  Schools were closed in Mansfield Township. Homes along State Route 57 were flooded. In Hackettstown, the Trout Brook flooded U.S. Route 46 and Stiger Street. A half dozen roads were closed in the town and at least three cars were damaged. Some basements were also flooded. Both the Pequest and Musconetcong Rivers flooded again. The flooding rains also damaged the apple, corn and sod crops. Event precipitation totals included 4.91 inches in Blairstown, 4.77 inches in Hackettstown, 4.47 inches in Allamuchy and 4.21 inches in Mansfield.

Flash Flood in SUSSEX, NEW JERSEY
From 28-SEP-11 07:15:00 to 28-SEP-11 12:00:00 (EST-5)
Location: HUNTSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorms with heavy downpours caused flash flooding along smaller streams and roadways mainly in the eastern part of Sussex County. The heavy rain affected Andover, Byram, Green, Sparta and Stanhope the most. Several roads were also closed in Sparta and one school was evacuated because a nearby creek flooded. Ponds also overflowed in the township along Stanhope Road. In Andover Township, one home was evacuated along Limecrest Road.   Road closures were also reported in and around Newton because of the flooding. The runoff from the heavy rain also led to flooding along the Flat Brook that lasted into the 30th. Event precipitation totals included 4.16 inches in Andover and 3.83 inches in Newton.

Flash Flood in HUNTERDON, NEW JERSEY
From 28-SEP-11 05:10:00 to 28-SEP-11 11:00:00 (EST-5)
Location: LEBANON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms with heavy downpours caused flash flooding along many small streams in north central Hunterdon County. Stream flooding was reported in Lebanon, Glen Gardner, Clinton and Tewksbury.  There were a couple of camper rescues and vehicles were flooded. The runoff from the heavy rain also caused flooding along the South Branch of the Raritan River. Event precipitation totals included 3.99 inches in High Bridge, 3.94 inches in Clinton, 3.93 inches in Lebanon, 3.88 inches in Califon, 3.23 inches in Holland and 3.13 inches in Franklin.

Flash Flood in MORRIS, NEW JERSEY
From 28-SEP-11 07:15:00 to 28-SEP-11 11:00:00 (EST-5)
Location: PLEASANT GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorms with heavy downpours caused flash flooding along smaller streams in southwestern Morris County in Washington and Mount Olive Townships. About a half dozen people had to be rescued from vehicles along River Road (South Branch of the Raritan River) in Mount Olive Township. Event precipitation totals included 4.99 inches in Mount Olive Township.

Flood in HUNTERDON, NEW JERSEY
From 28-SEP-11 06:34:00 to 29-SEP-11 01:00:00 (EST-5)
Location: BUNNVALE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from the heavier rain that fell earlier in the day on the 28th caused minor flooding along the South Branch of the Raritan River in Hunterdon County.  The South Branch of the Raritan River at High Bridge was above its 10 foot flood stage from 734 a.m. EDT through 815 p.m. EDT on the 28th. It crested at 11.18 feet at 3 p.m. EDT.  Farther downstream, the South Branch of the Raritan River at Stanton was above its 8 foot flood stage from 632 a.m. EDT on the 28th through 200 a.m. EDT on the 29th. It crested at 9.69 feet at 945 a.m. EDT on the 28th.

Flood in SOMERSET, NEW JERSEY
From 28-SEP-11 12:35:00 to 28-SEP-11 19:30:00 (EST-5)
Location: READINGTON ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from the heavier rain that fell earlier in the day on the 28th in Hunterdon and Morris Counties caused minor flooding around the confluence of the North and South Branches of the Raritan River later in the day on the 28th. The North Branch of the Raritan River at the village of South Branch was above its 7 foot flood stage from 135 p.m. EDT through 830 p.m. EDT on the 28th. It crested at 7.46 feet at 630 p.m. EDT.

Flood in SUSSEX, NEW JERSEY
From 28-SEP-11 17:40:00 to 30-SEP-11 11:04:00 (EST-5)
Location: WALLPACK CENTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from the heavier rain that fell earlier in the day on the 28th caused minor flooding along the Flat Brook that lasted into the 30th. The Flat Brook at Flatbrookville was above its 6 foot flood stage from 640 p.m EDT on the 28th through 1204 p.m. EDT on the 30th. It crested at 6.54 feet at 1115 p.m. EDT on the 28th.