A deep low pressure system tracked across the Lower Great Lakes northeastward into the St. Lawrence Valley from the evening of the 20th into the daytime of the 21st.  Its associated strong cold front swept eastward through the Mid Atlantic region and across New Jersey during the early morning of the 21st.  In addition, a secondary area of low pressure formed along the frontal boundary, west of Delaware Bay, and deepened rapidly.  The approaching cold front and the deepening secondary low pressure produced a strong southeasterly flow over the region that resulted in peak wind gusts ranging from 46 mph to 64 mph across the state.  About 35,000 homes and businesses lost power because of downed trees, tree limbs and wires. In addition, the significant southeast flow allowed water to pile up along the New Jersey shore and into Delaware Bay, producing minor to moderate coastal flooding at the time of high tide on the morning of the 21st.  Tidal flooding increased further along tidal sections of the Delaware River as major flooding occurred. Moderate to heavy rain fell across the state, with storm totals ranging between 1 to 3 inches.  This rain resulted in some mainly minor flooding of smaller streams and creeks in southern New Jersey.
The strong onshore flow contributed to higher high tides with minor to moderate tidal flooding occurring along the southern New Jersey oceanfront and in Barnegat Bay. In Ocean County, tidal flooding was reported on the barrier island section of Brick Township. In Toms River Township, tidal flooding was reported in the Green Island and Silverton sections of the township on Barnegat Bay. High tide at Atlantic City Reached 6.71 feet above mean lower low water. Minor tidal flooding starts at 6.0 feet above mean lower low water. High tide at Cape May reached 7.82 feet above mean lower low water. Moderate tidal flooding starts at 7.7 feet above mean lower low water.
The southeasterly flow pushed water up the Delaware Bay and into the tidal portions of the Delaware River, causing major tidal flooding to occur. Major tidal flooding occurred in both Philadelphia and Reedy Point. High tide at Reedy Point reached 9.2 feet above mean lower low water. Major tidal flooding starts at 9.2 feet above mean lower low water. High tide in Philadelphia reached 10.35 feet above mean lower low water. This was the third highest tide on record. Major tidal flooding starts at 10.2 feet above mean lower low water.  The high tide reached 11.13 feet above mean lower low water in Burlington City (Burlington). There are no established levels of tidal flooding at this site.
In Cumberland County, tidal flooding along the bay and the Maurice River caused water to spill over the causeway. In addition, a dike was broken in Maurice River Township near Matts Landing Road. Flooding was reported along Route 47. In Maurice River Township, Main Street in Dorchester was covered in 4 to 5 feet of water and Beaver Dam Road and County Route 553 were covered with 2 feet of water. In Commercial Township, homes in Bivalve and Port Norris were surrounded by water. Cove Road was flooded and closed.  In Downe Township, the tides and waves knocked down bulkheads and forced the displacement of two families. One thousand feet of unpaved road was also reported to be washed away in Gandys Beach.
In Salem County,  tidal flooding closed Hook Road in Pennsville Township (along the Salem Canal), Sinnickson Landing Road  (along the Salem River) in Elsinboro Township,  New Jersey State Route 45 in Salem (along the Salem River) and County Route 540 in Mannington Township (along the Salem Creek). Tidal flooding also affected the Penns Grove Carneys Point Library again. Tidal flooding off of Oldmans Creek flooded Woodstown-Pedericktown Road.  The tidal surge combined with freshwater runoff to cause flooding of Acton Station Road in Mannington Township and Alloway-Quinton Road  in Alloway and Quinton Townships.
In Gloucester County, several roadways were closed due to tidal flooding. In Logan Township, High Hill Road off the Raccoon Creek and Center Square Road off of Oldmans Creek were flooded. In West Deptford Township, Crown Point Road was closed between the Mid Atlantic Parkway and Mantua Grove Road off of the Main Ditch. Tidal flooding was reported along the Big Timber Creek near Westville. Water was reported to have entered at least one home in the area. Parts of Route 130 and Route 47 were closed due to flooding in the area.
In Camden County, a combination of tidal and freshwater flooding caused lanes on the Admiral Wilson Boulevard to be blocked as far east as New Jersey State Route 38.  Flooding was also reported at the Brooklawn Circle and U.S. Route 130 in Gloucester City (Off of the South Branch of the Big Timber Creek), where the highway was closed in both directions. In Burlington County, home evacuations were performed due to tidal flooding in Burlington City.
In Southern New Jersey,  wind related power outages were concentrated in Cumberland and Salem Counties. The Gloucester County College and Institute of Technology canceled classes on the 21st because of power outages. A downed pole closed a section of New Jersey State Route 47 in Gloucester County.  In central New Jersey, power outages were concentrated in the Toms River area. In Northern New Jersey, approximately 27,000 homes and businesses lost power.  Some of the more concentrated outages were in Pequannock and East Hanover in Morris County.  In Hunterdon County, downed trees, poles and wires closed roadways in East and West Amwell Townships.  Peak wind gusts included 64 mph in Sandy Hook (Monmouth County), 62 mph in Burlington (Burlington County), 59 mph in Eatontown (Monmouth County), 58 mph in Westville (Gloucester County), 57 mph in Sea Girt (Monmouth County) and at North Beach (Ocean County), 56 mph at the Millville Airport (Cumberland County), 55 mph in Tuckerton (Ocean County), 54 mph in Seaside Heights (Ocean County) and in Mullica Township (Atlantic County), 52 mph in Ocean City (Cape May County) and at McGuire Air Force Base (Burlington County) and also at the intersection of Interstate 78 and County Road 525 (Somerset County), 51 mph at the Atlantic City International Airport (Atlantic County), 50 mph in Hamilton  (Mercer County) and also at the intersection of I-295 and Route 140 (Salem County), 49 mph in Upper Deerfield Township (Cumberland County), 48 mph at Cape May Harbor (Cape May County) and at the Belmar-Farmingdale Airport (Monmouth County), 47 mph at the Trenton Airport (Mercer County) and in New Brunswick (Middlesex County) and also in Harvey Cedars (Ocean County), and 46 mph in Pittstown (Hunterdon County).  Strong winds occurred throughout central to southern parts of the state, beginning a few hours prior to daybreak and ending soon after sunrise on the 21st.  A few areas also recorded high winds during this timeframe.  Winds decreased by mid-morning following the passage of the surface cold front.

Flood in HUNTERDON, NEW JERSEY
From 21-DEC-12 04:20:00 to 21-DEC-12 15:00:00 (EST-5)
Location: RIEGEL RIDGE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Flooding caused the closure of U.S. Route 22 in Readington Township west of Oldwick Road (County Route 523) for two hours on the morning of the 21st. In Raritan Township, both Dayton and Hampton Corner Roads were flooded by the Neshanic River. The flooding also covered sections of the Copper Hill Country Club. The Spruce Run at Glen Gardner was above its 4.5 foot flood stage from 427 a.m. EST through 1245 p.m. EST on the 21st. It crested at 6.63 feet at 815 a.m. EST on the 21st. The Neshanic at Reaville was above its 5 foot flood stage from 452 a.m. EST through 258 p.m. EST on the 21st. It crested at 8.44 feet at 945 a.m. EST on the 21st.
Event precipitation totals included 3.01 inches in Stockton, 2.48 inches in Franklin Township, 2.41 inches in Tewksbury Township, 2.39 inches in Clinton, 2.09 inches in Lambertville, 2.06 inches in Flemington and 2.05 inches in Alexandria Township.

Flood in SOMERSET, NEW JERSEY
From 21-DEC-12 08:30:00 to 22-DEC-12 17:00:00 (EST-5)
Location: NORTH BRANCH
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 1238 p.m. EST through 344 p.m. EST on the 21st. It crested at 12.53 feet at 215 p.m. EST on the 21st. Farther downstream, the North Branch of the Raritan River at South Branch was above its 7 foot flood stage from 832 a.m. EST through 902 p.m. EST on the 21st. It crested at 9.01 feet at 415 p.m. EST on the 21st. The Millstone River at Griggstown was above its 10 foot flood stage from 1240 p.m. EST on the 21st through 5 p.m. EST on the 22nd. It crested at 11.14 feet at 315 a.m. EST on the 22nd.
Event precipitation totals included 1.82 inches in Bedminster Township, 1.70 inches in Bernards Township, 1.62 inches at the Somerville Airport, 1.61 inches in Pottersville, 1.60 inches in Peapack-Gladstone and Branchburg Township, 1.56 inches in Bridgewater Township, 1.55 inches in Hillsborough Township, 1.48 inches in Bound Brook and 1.46 inches in Warren Township.

Flood in MORRIS, NEW JERSEY
From 21-DEC-12 06:00:00 to 23-DEC-12 05:46:00 (EST-5)
Location: GREEN POND JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The East Ditch at Beaver Brook Road was above its 2.5 foot flood stage from 602 a.m. EST through 822 p.m. EST on the 21st. It crested at 3.32 feet at 1110 a.m. EST on the 21st. The Macopin Dam at Pequannock was above its 5.5 foot flood stage from 451 p.m. EST on the 21st through 150 a.m. EST on the 22nd. It crested at 6.39 feet at 1120 p.m. EST on the 21st. The Rockaway at Boonton below the reservoir was above its 5 foot flood stage from 933 p.m. EST on the 21st through 1145 p.m. EST on the 22nd. It crested at 5.56 feet at 530 a.m. EST on the 22nd. The Pompton River at Ryerson Road was above its 12 foot flood stage from 711 a.m. EST on the 22nd through 135 a.m. EST on the 23rd. It crested at 12.59 feet at 225 p.m. EST on the 22nd. Farther downstream, the Pompton River at Midwood was above its 7.5 foot flood stage from 651 a.m. EST on the 22nd through 546 a.m. EST on the 23rd. It crested at 8.08 feet at 4 p.m. EST on the 22nd. Event precipitation totals included 3.11 inches in Jefferson Township, 2.66 inches in Rockaway, 2.62 inches in Mansfield Township, 2.52 inches in Mine Hill Township and 2.40 inches in Randolph Township.

Coastal Flood in EASTERN CAPE MAY, NEW JERSEY
From 21-DEC-12 00:00:00 to 21-DEC-12 08:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Coastal Flood in CUMBERLAND, NEW JERSEY
From 21-DEC-12 01:00:00 to 21-DEC-12 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Coastal Flood in CAMDEN, NEW JERSEY
From 21-DEC-12 02:00:00 to 21-DEC-12 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Coastal Flood in SALEM, NEW JERSEY
From 21-DEC-12 01:00:00 to 21-DEC-12 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Coastal Flood in GLOUCESTER, NEW JERSEY
From 21-DEC-12 02:00:00 to 21-DEC-12 13:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Coastal Flood in NORTHWESTERN BURLINGTON, NEW JERSEY
From 21-DEC-12 03:00:00 to 21-DEC-12 14:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Coastal Flood in WESTERN CAPE MAY, NEW JERSEY
From 21-DEC-12 01:00:00 to 21-DEC-12 11:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: C-MAN Station

Strong Wind in EASTERN OCEAN, NEW JERSEY
From 21-DEC-12 04:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 48.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in WESTERN OCEAN, NEW JERSEY
From 21-DEC-12 04:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 43.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in EASTERN MONMOUTH, NEW JERSEY
From 21-DEC-12 04:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 42.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in WESTERN MONMOUTH, NEW JERSEY
From 21-DEC-12 04:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 42.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

High Wind in EASTERN MONMOUTH, NEW JERSEY
From 21-DEC-12 07:05:00 to 21-DEC-12 08:00:00 (EST-5)
Magnitude: 56.00 MG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Mesonet

High Wind in WESTERN MONMOUTH, NEW JERSEY
From 21-DEC-12 07:05:00 to 21-DEC-12 08:00:00 (EST-5)
Magnitude: 51.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Department of Highways

Strong Wind in MERCER, NEW JERSEY
From 21-DEC-12 04:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 43.00 MG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Department of Highways

Strong Wind in MIDDLESEX, NEW JERSEY
From 21-DEC-12 04:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 41.00 MG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in SOMERSET, NEW JERSEY
From 21-DEC-12 05:30:00 to 21-DEC-12 07:00:00 (EST-5)
Magnitude: 45.00 MG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Department of Highways

Strong Wind in HUNTERDON, NEW JERSEY
From 21-DEC-12 05:30:00 to 21-DEC-12 07:00:00 (EST-5)
Magnitude: 40.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

A 46 mph wind gust was recorded in Pittstown at 600 am EST on the morning of the 21st.  Elsewhere in the county, a large tree was reported down across Route 31 near mile-marker 36 just north of Clinton.

Flood in WARREN, NEW JERSEY
From 21-DEC-12 05:00:00 to 21-DEC-12 10:00:00 (EST-5)
Location: HACKETTSTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Heavy rain caused flooding along the Hackery Brook in Hackettstown. Both Manor Drive and East Baldwin Street were flooded and closed around the waterway.  Event precipitation totals included 2.33 inches in White Township, 2.30 inches in Hackettstown,  2.26 inches in Stewartsville, 2.16 inches in Broadway, 2.15 inches in Allamuchy Township, 2.05 inches in Phillipsburg, 1.91 inches in Belvidere and 1.78 inches in Blairstown.

Strong Wind in SALEM, NEW JERSEY
From 21-DEC-12 03:00:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 43.00 MG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in CUMBERLAND, NEW JERSEY
From 21-DEC-12 03:00:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 49.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

Strong Wind in EASTERN CAPE MAY, NEW JERSEY
From 21-DEC-12 03:00:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 45.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in WESTERN CAPE MAY, NEW JERSEY
From 21-DEC-12 03:00:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 42.00 MG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in EASTERN ATLANTIC, NEW JERSEY
From 21-DEC-12 03:00:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 44.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

Strong Wind in WESTERN ATLANTIC, NEW JERSEY
From 21-DEC-12 03:00:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 47.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in GLOUCESTER, NEW JERSEY
From 21-DEC-12 03:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 45.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Department of Highways

High Wind in GLOUCESTER, NEW JERSEY
From 21-DEC-12 04:05:00 to 21-DEC-12 05:00:00 (EST-5)
Magnitude: 50.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Strong Wind in NORTHWESTERN BURLINGTON, NEW JERSEY
From 21-DEC-12 03:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 45.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: ASOS

High Wind in NORTHWESTERN BURLINGTON, NEW JERSEY
From 21-DEC-12 05:10:00 to 21-DEC-12 06:50:00 (EST-5)
Magnitude: 54.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: NWS Employee

Strong Wind in CAMDEN, NEW JERSEY
From 21-DEC-12 03:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 40.00 MG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in SOUTHEASTERN BURLINGTON, NEW JERSEY
From 21-DEC-12 03:30:00 to 21-DEC-12 08:30:00 (EST-5)
Magnitude: 41.00 MG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: RAWS

Flood in WARREN, NEW JERSEY
From 21-DEC-12 13:00:00 to 21-DEC-12 22:15:00 (EST-5)
Location: MANUNKA CHUNK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Pequest River at Pequest was above its 4 foot flood stage from 102 p.m. EST through 1015 p.m. EST on the 21st.  It crested at 4.14 feet at 330 p.m. EST on the 21st.
Event precipitation totals included 2.30 inches in Oxford Township, 2.26 inches in Stewartsville, 2.16 inches in Broadway, 2.15 inches in Allamuchy Township, 2.05 inches in Phillipsburg, 1.91 inches in Belvidere and 1.78 inches in Blairstown.