A series of thunderstorms preceding a cold front dropped three to seven inches of rain across a wide swath of New Jersey (less along most of the coast) from overnight on the 13th into the day on the 14th. But in southern Gloucester, Eastern Salem and Western Cumberland County, rainfall amounts reached seven to eleven inches. Scattered thunderstorms occurred into the 15th and morning of the 16th. This slowed the recession of rivers and streams in the state. The combined event caused severe flash flooding with dam breaks in southwestern New Jersey and flash flooding and flooding across central and northern New Jersey.  Damage estimates reached around 25 million dollars, most of which occurred in Salem and Cumberland Counties.

Flash Flood in GLOUCESTER, NEW JERSEY
From 14-AUG-11 09:00:00 to 14-AUG-11 14:00:00 (EST-5)
Location: WILLIAMSTOWN
Flood cause: Heavy Rain
Property damage: 0.10M
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms with repeated torrential downpours caused flash flooding of roadways, streams and basements in the southern half of Gloucester County. Roadway flooding was reported in Pitman, Glassboro, Franklin, Washington and Monroe Townships. In Malaga (Franklin Township),  U.S. Route 40 and New Jersey State Route 47 were flooded. The latter was still closed on the 15th. Conrail train service was stopped because of a sinkhole. In Glassboro, the foundation of a house on Deptford Drive collapsed. A motorist was rescued from flood waters on Delsea Drive (New Jersey State Route 47) near Clayton. In Clayton itself, a house became unstable because of its undermined foundation on North Main Street. In Williamstown (Monroe Township), flooding was reported along the Black Horse Pike (New Jersey State Route 42). Flooding also commenced along the Raccoon Creek. Event precipitation totals included 8.53 inches in Franklin Township and 5.92 inches in Woolwich Township.

Flash Flood in CUMBERLAND, NEW JERSEY
From 14-AUG-11 09:00:00 to 14-AUG-11 14:00:00 (EST-5)
Location: STOW CREEK LNDG
Flood cause: Heavy Rain
Property damage: 20.00M
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms with repeated torrential downpours caused flash flooding of roadways and streams in the western part of Cumberland County and affected Upper Deerfield Township and Bridgeton the hardest where two dams failed. This led to the evacuation of residents along the Cohansey River in Bridgeton, A county state of emergency was also declared. Over a dozen roadways were flooded and evacuations and water rescues occurred. Major roadways that were flooded and closed included State Routes 49 and 77. Many farm fields were submerged. Other hard hit municipalities included Greenwich, Stow Creek, Hopewell and Shiloh. Crops were also damaged, especially canning tomatoes. Damage was estimated at 20 million dollars.
In Upper Deerfield Township, the torrential downpours started a domino effect of dam failures along the Cohansey River.  Seeley Lake was breached along Finley Road. The road was destroyed as the lake completely emptied. Downstream, the surge of water caused Sunset Lake to breach at West Park Drive in Bridgeton. This lead to the evacuation of approximately 150 residents along the Cohansey River within the city. A shelter was opened on Buckston Road. An approximately 1250 foot breach occurred along the river that flooded the Raceway within the Bridgeton City Park. The Cohanzick Zoo along the river was also flooded, but no animals were injured and the zoo itself was not seriously damaged. Flooding along Sunset Lake also led to the washout of a 75 foot by 100 foot section of Beebe Run Road within the city.  Event precipitation totals included 10.82 inches in Upper Deerfield and 10.63 inches in Seabrook.

Flash Flood in MONMOUTH, NEW JERSEY
From 14-AUG-11 10:00:00 to 14-AUG-11 12:00:00 (EST-5)
Location: MIDDLETOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with torrential downpours caused poor drainage and small creek flooding in central and eastern Monmouth Counties in Long Branch, Neptune, Ocean and Middletown Townships. Several major roads were flooded and closed and water rescues were performed. In Long Branch, five vehicles became stuck in flood waters.  In Neptune Township, both New Jersey State Routes 33 and 35 flooded. In Ocean Township, three roadways flooded and in Middletown Township, southbound New Jersey State Route 35 was closed as was Palmer Avenue between New Jersey State Routes 35 and 36.  Event precipitation totals included 5.55 inches in Ocean Township,  5.51 inches in Red Bank, 4.78 inches in Rumson, 4.66 inches in Long Branch, 4.29 inches in Middletown Township and 3.82 inches in Belmar.

Flood in GLOUCESTER, NEW JERSEY
From 14-AUG-11 11:30:00 to 14-AUG-11 23:30:00 (EST-5)
Location: MT ROYAL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

The runoff from the heavy rain caused flooding in northern Gloucester County including the Mantua Creek basin.  A 55-year-old woman drowned after she drove into the swollen creek. Her body was recovered on the 15th. In West Deptford, a 30 foot by 15 foot sink hole caused a basement masonry wall collapse on Ellwood Avenue. Near the Mantua Creek, the southern end of the Willow Woods Mobile Home Park on Crown Point Road (New Jersey State Route 44) was flooded and evacuated. The roadway remained closed into the 15th. Paradise Road in West Deptford was also closed. Event precipitation totals in the Mantua Creek drainage basin averaged 4 to 5 inches.

Flood in GLOUCESTER, NEW JERSEY
From 14-AUG-11 14:00:00 to 15-AUG-11 08:07:00 (EST-5)
Location: MULLICA HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The runoff from the heavy rain caused the greatest flooding along the Raccoon Creek since August 10, 1967. The Raccoon Creek at Swedesboro had its second highest crest on record since that date. The creek was above its 13 foot flood stage from 127 p.m. EDT on the 14th  through 907 a.m. EDT on the 15th. It crested at 15.96 feet at 715 p.m. EDT on the 14th.

Flood in CUMBERLAND, NEW JERSEY
From 14-AUG-11 14:00:00 to 19-AUG-11 00:45:00 (EST-5)
Location: ROSENHAYN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff flooding from the torrential downpours persisted through the day on the 14th in western Cumberland County. Flooding then also started along the Maurice River. The Maurice River at Norma had major flooding and the second highest crest on record. The river at Norma was above its 4 foot flood stage from 105 a.m. EDT on the 15th through 145 a.m. EDT on the 19th. It crested at 6.33 feet at 125 p.m. EDT on the 16th.

Flood in ATLANTIC, NEW JERSEY
From 15-AUG-11 13:31:00 to 17-AUG-11 15:15:00 (EST-5)
Location: FOLSOM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from the torrential downpours, especially in the headwaters of the Great Egg Harbor River, led to record breaking and major flooding at the Folsom gage site on the 16th. The Great Egg Harbor River at Folsom was above its 6 foot flood stage from 231 p.m. EDT on the 15th through 415 p.m. EDT on the 17th. It crested at 8.18 feet at 530 a.m. EDT on the 16th.

Flood in MONMOUTH, NEW JERSEY
From 14-AUG-11 21:18:00 to 15-AUG-11 03:35:00 (EST-5)
Location: SQUANKUM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from the heavy rain on the 14th caused flooding along the Manasquan River into the 15th. The Manasquan River at Squankum was above its 7.5 foot flood stage from 1018 p.m. EDT on the 14th  through 435 a.m. EDT on the 15th. It crested at 7.67 feet at 1215 a.m. EDT on the 15th.

Flash Flood in SALEM, NEW JERSEY
From 14-AUG-11 08:00:00 to 14-AUG-11 14:00:00 (EST-5)
Location: OAKWOOD BEACH
Flood cause: Heavy Rain
Property damage: 5.10M
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorms with repeated torrential downpours caused flash flooding with damaging effects across eastern Salem County, especially in Pittsgrove Township. A county state of emergency was declared. At least one water rescue was reported. Flooding was reported in Alloway, Pittsgrove, Elmer and Upper Pittsgrove Townships. Fourteen roadways, nine bridges and many culverts were damaged, most in Pittsgrove Township. Some families were evacuated in Pittsgrove Township around Palatine and Centerton Lakes. Two bridges washed away in the township on Greenville and Burlington Roads. It was expected to take six to twelve months for both bridges to be replaced. Two other township roadways remained closed into the 19th. In spite of being drained prior to the rain, Centeron Lake filled and flooded. A few homes were half submerged by flood waters along Palatine Lake. In Elmer, Elmer Lake also flooded. Event precipitation totals included 9.64 inches in Elmer and 5.89 inches in Woodstown.

Flood in GLOUCESTER, NEW JERSEY
From 16-AUG-11 00:40:00 to 16-AUG-11 05:48:00 (EST-5)
Location: MULLICA HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

More thunderstorms with heavy rain and extremely wet antecedent conditions caused additional flooding overnight on the 15th along the Raccoon Creek. County rainfall amounts averaged around one inch. The Raccoon Creek at Swedesboro was above its 13 foot flood stage from 140 a.m. EDT through 648 a.m. EDT on the 16th. It crested at 13.35 feet at 245 a.m. EDT.

Flash Flood in CAMDEN, NEW JERSEY
From 14-AUG-11 09:00:00 to 14-AUG-11 12:00:00 (EST-5)
Location: WINSLOW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with torrential downpours caused roadway, poor drainage and field flooding in the southern half of Camden County. Several roadways were flooded and closed, the most notable the White Horse Pike (U.S. Route 30).  Event precipitation totals included 8.04 inches in Winslow Township and 5.41 inches in Berlin Township.

Flood in SALEM, NEW JERSEY
From 14-AUG-11 14:00:00 to 19-AUG-11 00:45:00 (EST-5)
Location: NORMA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff flooding from the torrential downpours persisted through the day on the 14th. Flooding then also started along the Maurice River. The Maurice River at Norma had major flooding and the second highest crest on record. The river at Norma was above its 4 foot flood stage from 105 a.m. EDT on the 15th through 145 a.m. EDT on the 19th. It crested at 6.33 feet at 125 p.m. EDT on the 16th.

Flash Flood in WARREN, NEW JERSEY
From 14-AUG-11 00:00:00 to 14-AUG-11 05:00:00 (EST-5)
Location: PHILLIPSBURG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Thunderstorms with heavy downpours caused flash flooding of smaller streams and roadways in southern Warren County, mainly in Lopatcong, Greenwich and Pohatcong Townships, Alpha Borough and Phillipsburg. Event precipitation totals included 5.30 inches in Washington Township, 4.74 inches in Greenwich Township and 4.08 inches in Phillipsburg.

Flash Flood in HUNTERDON, NEW JERSEY
From 14-AUG-11 00:00:00 to 14-AUG-11 05:00:00 (EST-5)
Location: HOLLAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorms with heavy downpours caused flash flooding of smaller streams and roadways in northwestern Hunterdon County, mainly in Alexandria, Bethlehem, Holland and Union Townships. Event precipitation totals included 5.23 inches in Bethlehem Township, 5.18 inches in Califon, 4.59 inches in High Bridge and 4.36 inches in Clinton.

Flash Flood in SOMERSET, NEW JERSEY
From 14-AUG-11 04:53:00 to 14-AUG-11 08:30:00 (EST-5)
Location: BELLE MEAD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Thunderstorms with heavy downpours caused flash flooding of smaller streams and roadways in southern Somerset County. The runoff from the heavy rain caused flooding along the Millstone River later that day. The Pike Run at Belle Mead was above its 7 flood stage from 653 a.m. EDT through 1046 a.m. EDT on the 14th. It crested at 7.25 feet at 930 a.m. EDT.  Event precipitation totals included 5.86 inches in Montgomery Township, 4.61 inches in Hillsborough Township and 4.13 inches in Franklin Township.

Flash Flood in MORRIS, NEW JERSEY
From 14-AUG-11 09:05:00 to 14-AUG-11 11:00:00 (EST-5)
Location: LINCOLN PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Thunderstorms with heavy rain caused flash flooding of roadways and streams in northeastern Morris County during the morning of the 14th. The runoff flooding continued into the morning of the 16th. The East Ditch at Beaver Brook Road was above its 2.5 foot flood stage from 1005 a.m. EDT on the 14th through 817 a.m. EDT on the 16th. It crested at 3.13 feet at 1050  p.m. EDT on the 14th. Event precipitation totals included 4.45 inches in Long Hill Township, 4.08 inches in Denville, 3.79 inches in Morris Township, 3.75 inches in Chatham and 3.47 inches in Parsippany.

Flood in MORRIS, NEW JERSEY
From 14-AUG-11 11:00:00 to 16-AUG-11 07:17:00 (EST-5)
Location: LINCOLN PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from a series of thunderstorms from overnight on the 13th through the morning of the 16th caused poor drainage and creek flooding in northeast Morris County. The East Ditch at Beaver Brook Road was above its 2.5 foot flood stage from 1005 a.m. EDT on the 14th  through 817 a.m. EDT on the 16th. It crested at 3.13 feet at 1050  p.m. EDT on the 14th. Seventy-two hour precipitation event totals through the morning of the 16th included 6.09 inches in Denville, 5.29 inches in Long Hill Township, 5.15 inches in Mine Hill Township, 5.01 inches in Parsippany, 4.75 inches in Morris Township, 4.54 inches in Chatham and 3.98 inches in Boonton.

Flood in MERCER, NEW JERSEY
From 14-AUG-11 17:00:00 to 14-AUG-11 20:30:00 (EST-5)
Location: TRENTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from heavy rain that fell mainly during the first half of the day and early afternoon on the 14th led to flooding along the Assunpink Creek that evening. The Assunpink Creek in Trenton was above its 8.5 foot flood stage from 600 p.m. EDT through 1151 p.m. EDT on the 14th  It crested at 8.82 feet at 930 p.m. EDT. Event precipitation totals included.

Flash Flood in ATLANTIC, NEW JERSEY
From 14-AUG-11 09:00:00 to 14-AUG-11 11:00:00 (EST-5)
Location: WHEAT RD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Thunderstorms with torrential downpours caused street and small stream flash flooding along the northern tier of Atlantic County and affected Hammonton Township the hardest. Four roadways: Fairview Avenue, Orchard Street, Second Street and Railroad Avenue were closed. heavy rain also affected Folsom, Buena and Buena Vista Township. Event precipitation totals included 7.51 inches in Hammonton and 2.15 inches in Buena Vista Township.

Flood in SOMERSET, NEW JERSEY
From 14-AUG-11 08:30:00 to 16-AUG-11 23:30:00 (EST-5)
Location: ROCKY HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Runoff from a series of thunderstorms from overnight on the 13th through the morning of the 16th caused poor drainage and river flooding, first along Pike Run in Belle Mead and then moderate flooding along the Millstone River.
The Millstone River at Griggstown and Blackwells Mills had moderate flooding. The Millstone River at Griggstown was above its 10 foot flood stage from 145 p.m. EDT on the 14th through 1230 a.m. EDT on the 17th. It crested at 13.99 feet at 415 a.m. EDT on the 15th. Farther downstream, the Millstone River at Blackwells Mills was above its 9 foot flood stage from 105 a.m. EDT on the 15th through 620 a.m. EDT on the 16th. It crested at 10.26 feet at 845 a.m. EDT on the 15th.  The Pike Run at Belle Mead was above its 7 flood stage from 653 a.m. EDT through 1046 a.m. EDT on the 14th. It crested at 7.25 feet at 930 a.m. EDT.
Seventy-two hour event precipitation totals ending the morning of the 16th included 6.68 inches in Montgomery Township, 6.58 inches in Hillsborough Township 4.92 inches in Franklin Township and 4.75 inches in Bridgewater Township.   .