A protracted rain event from the daylight hours on the 6th through the early morning on the 8th culminated with heavy rain during the afternoon and evening of the 7th and caused poor drainage flooding in New Jersey. It also caused minor to locally moderate river and creek flooding in the Raritan and Passaic River Basins in northern New Jersey and minor creek and river flooding in southwest New Jersey. Flooding in the Passaic Basin persisted into the early morning of the 11th. Event precipitation totals averaged 2 to 3 inches. The rain was caused by waves of low pressure that moved northeast along a slowly moving frontal boundary. The cold front was in central Pennsylvania on the morning of the 6th and eastern Pennsylvania on the morning of the 7th. The last wave of low pressure on this boundary, located over western North Carolina at 7 a.m. EST on the 7th intensified rapidly as the 7th progress. It was during this intensification process that rain fell at its heaviest that afternoon and evening. The low pressure system itself passed through Delaware during the early evening of the 7th and was over the Monmouth County, New Jersey coastal waters at 10 p.m. EST on the 7th. It reached Long Island, New York at 1 a.m. EST on the 8th. Shortly after the low reached Long Island, the rain ended across New Jersey.

Flood in CAMDEN, NEW JERSEY
From 08-DEC-11 03:29:00 to 08-DEC-11 08:01:00 (EST-5)
Location: HADDONFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Cooper River at Haddonfield was above its 2.8 foot flood stage from 329 a.m. EST through 801 a.m. EST on the 8th. It crested at 2.92 feet at 600 a.m. EST on the 8th. Event precipitation totals included 2.43 inches in Winslow Township, 2.34 inches in Berlin Township and 1.96 inches in Merchantville.

Flood in MORRIS, NEW JERSEY
From 07-DEC-11 21:27:00 to 11-DEC-11 01:45:00 (EST-5)
Location: BOONTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Pompton River at Ryerson Road had moderate flooding and was above its 12 foot flood stage from 1049 a.m. EST on the 8th through 545 a.m. EST on the 10th. It crested at 13.71 feet at 235 a.m. EST on the 9th. Farther downstream, the Pompton River at Midwood had moderate flooding and was above its 7.5 foot flood stage from 953 a.m. EST on the 8th through 745 p.m. EST on the 10th. It crested at 9.24 feet at 540 a.m. EST on the 9th. Farther downstream, the Pompton River at Mountainview Bridge was above its 8 foot flood stage from 800 a.m. EST through 1000 a.m. EST on the 9th. It crested at 8.02 feet at 845 a.m. EST on the 9th. The Passaic River at Lincoln Park (Circle Burners) was above its 5.5 foot flood stage from 140 p.m. EST on the 9th through 330 p.m. EST on the 10th. It crested at 5.63 feet at 1100 p.m. EST on the 9th. Farther downstream, the Passaic River at Two Bridges (Passaic and Union County border) was above its 7 foot flood stage from 400 a.m. EST on the 9th through 145 a.m. EST on the 11th. It crested at 9.41 feet at 930 p.m. EST on the 9th.
The Rockaway River below the Boonton Reservoir was above its 5 foot flood stage from 1245 p.m. EST on the 8th through 715 a.m. EST on the 9th. It crested at 5.28 feet at 700 p.m. EST on the 8th. The East Ditch at Beaver Brook Road was above its 2.5 foot flood stage from 927 p.m. EST on the 7th through 240 p.m. EST on the 8th. It crested at 3.45 feet at 520 a.m. EST on the 8th. Event precipitation totals included 2.50 inches in Mine Hill Township, 2.42 inches in Denville, 2.37 inches in Parsippany, 2.34 inches in Morris Township, 2.22 inches in Florham Park, 2.17 inches in Chatham and 2.02 inches in Long Hill Township.

Flood in SOMERSET, NEW JERSEY
From 07-DEC-11 22:32:00 to 10-DEC-11 02:45:00 (EST-5)
Location: SOMERVILLE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The North Branch of the Raritan River at North Branch was above its 12.3 foot flood stage from 142 a.m. EST through 555 a.m. EST on the 8th. It crested at 12.59 feet at 315 a.m. EST on the 8th. Farther downstream, the North Branch of the Raritan River at South Branch was above its 7 foot flood stage from 1032 p.m. EST on the 7th through 1213 p.m. EST on the 8th. It crested at 9.90 feet at 630 a.m. EST on the 8th. The Main Stem of the Raritan River at Manville was above its 14 foot flood stage from 752 a.m. EST through 303 p.m. EST on the 8th. It crested at 14.90 feet at 1130 a.m. EST on the 8th. Farther downstream, the Raritan River at Bound Brook was above its 28 foot flood stage from 1002 a.m. EST through 441 p.m. EST on the 8th. It crested at 28.59 feet at 130 p.m. EST.
The Millstone River at Griggstown had moderate flooding and was above its 10 foot flood stage from 1133 p.m. EST on the 7th through 245 a.m. EST on the 10th. It crested at 14.29 feet at 215 p.m. EST on the 8th. Farther downstream, the Millstone River at Blackwells Mills also had moderate flooding and was above its 9 foot flood stage from 701 a.m. EST on the 8th through 937 a.m. EST on the 9th. It crested at 10.79 at 530 p.m. EST on the 8th. The Pike Run in Belle Mead was above its 7 foot flood stage from 1146 pm. EST on the 7th through 236 a.m. EST on the 8th. It crested at 7.34 feet at 1 a.m. EST on the 8th.
Event precipitation totals included 2.60 inches in Franklin Township, 2.30 inches in Hillsborough and Bridgewater Townships, 2.27 inches in Montgomery Township and 2.23 inches in Bernards Township.

Flood in GLOUCESTER, NEW JERSEY
From 08-DEC-11 01:45:00 to 08-DEC-11 11:57:00 (EST-5)
Location: MULLICA HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Raccoon Creek at Swedesboro was above its 13 foot flood stage from 145 a.m. EST through 1157 a.m. EST on the 8th. It crested at 13.59 feet at 600 a.m. EST on the 8th.  Event precipitation totals included 2.98 inches in Pitman, 2.83 inches in Woolwich Township and 2.66 inches in Franklin Township.