Periods of rain, heavy at times, produced poor drainage flooding as well as minor to moderate flooding of creeks and rivers in the Passaic and Raritan Basins. Event precipitation totals averaged two to three inches, with some locally higher amounts in Hunterdon County. The steady rain began during the afternoon of the 22nd, fell at its heaviest from the evening of the 22nd into the early morning of the 23rd. The rain ended during the early afternoon of the 23rd.
The combination of the higher spring astronomical tides associated with the approaching new moon and the lack of offshore flow caused minor tidal flooding to occur during the morning high tide cycles on the 23rd and 24th along the New Jersey Coast.  The highest tides reached 7.07 feet above mean lower low water at Sandy Hook (Monmouth County) and 7.12 feet above mean lower low water in Cape May (Cape May County). Minor tidal flooding starts at 6.7 feet above mean lower low water. The highest tide reached 6.40 feet above mean lower low water in Atlantic City (Atlantic County). Minor tidal flooding starts at 6.0 feet above mean lower low water.
The heavy rain was caused by a low pressure system that moved from the lower Ohio Valley on the morning of the 22nd northeast into western Pennsylvania on the evening of the 22nd. The low then moved east and passed across Eastern Pennsylvania during the mid morning of the 23rd and moved off the New Jersey coast during the early afternoon of the 23rd on its way to Cape Cod, Massachusetts.

Flood in MORRIS, NEW JERSEY
From 23-NOV-11 01:00:00 to 24-NOV-11 07:00:00 (EST-5)
Location: LINCOLN PARK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Rockaway River below the Boonton Reservoir was above its 5 foot flood stage from 908 p.m. EST on the 23rd through 700 a.m. EST on the 24th.  It crested at 5.09 feet at 1215 a.m. EST on the 24th. The East Ditch at Beaver Brook Road was above its 2.5 foot flood stage from 1 a.m. EST on the 23rd through 1130 p.m. EST on the 23rd. It crested at 3.56 feet at 940 a.m. EST.
Event precipitation totals included 2.62 inches in Parsippany, 2.53 inches in Chatham Township,  2.48 inches in Florham Park, 2.42 inches in Boonton Township and 2.32 inches in Long Hill Township.

Flood in HUNTERDON, NEW JERSEY
From 23-NOV-11 06:52:00 to 23-NOV-11 08:37:00 (EST-5)
Location: SUNNYSIDE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rain and flooding forced the closure of westbound U.S. Route 22 in Readington Township and all of New Jersey State Route 29 in Delaware Township south of Paulmier Road near the Locatong Creek. The South Branch of the Raritan River at Stanton was above its 8 foot flood stage from 652 a.m. EST through 837 a.m. EST on the 23rd.  It crested at 8.09 feet at 745 a.m. EST. Event precipitation totals included 3.37 inches in Bethlehem, 3.18 inches in Clinton, 2.88 inches in Alexandria Township, 2.46 inches in Readington Township and 2.40 inches in Flemington.

Flood in SOMERSET, NEW JERSEY
From 23-NOV-11 00:30:00 to 25-NOV-11 03:05:00 (EST-5)
Location: ROCKY HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rain and flooding forced the closure of one southbound lane on U.S. Route 206 in Montgomery Township and Eastbound Interstate 78 near Interstate 287.
The North Branch of the Raritan River at North Branch was above its 12.3 foot flood stage from 800 a.m. EST through 1214 p.m. EST on the 23rd.  It crested at 12.50 feet at 1015 a.m. EST.  Farther downstream, the North Branch of the Raritan River at the village of South Branch was above its 7 foot flood stage from 1230 a.m. EST through 620 p.m. EST on the 23rd.  It crested at 9.20 feet at 1215 p.m. EST.  The main stem of the Raritan River at Manville was above its 14 foot flood stage from 235 p.m. EST through 727 p.m. EST on the 23rd.  It crested at 14.26 feet at 515 p.m. EST.  The Millstone River at Griggstown had moderate flooding and was above its 10 foot flood stage from 304 a.m. EST on the 23rd  through 305 a.m. EST on the 25th.  It crested at 12.89 feet at 6 p.m. EST on the 23rd. Farther downstream, the Millstone River at Blackwells Mills was above its 9 foot flood stage from 518 p.m. EST on the 23rd through 522 a.m. EST on the 24th.  It crested at 9.36 feet at 1045 p.m. EST on the 23rd.
Event precipitation totals included 2.52 inches in Bedminster Township, 2.35 inches in Bernards Township, 2.17 inches in Montgomery Township, 2.13 inches in Hillsborough Township and Somerville and 2.04 inches in Franklin Township.