A strengthening coastal low pressure system brought several rounds of rain to the region Sunday night into Monday (December 17-18th). Total rainfall amounts across the forecast area varied from about 1.50 inches up to 7.00 inches. The heaviest rains fell across southern Delaware up through the coastal plain of New Jersey. This heavy rain fell on already saturated soils. As a result, river flooding was prevalent across the Passaic Basin, Raritan Basin, and southeast Pennsylvania basins including the Schuylkill and Brandywine. The Brandywine flooding extended in to Delaware. Smaller streams and rivers across northern New Castle County in Delaware, such as the Christina, Red Clay, and White Clay also flooded.

Flood in MORRIS, NEW JERSEY
From 18-DEC-23 04:00:00 to 25-DEC-23 08:00:00 (EST-5)
Location: GREEN POND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Across the Passaic Basin, flooding occurred along the Pequannock River. Macopin crested at 6.3 ft. Flooding occurred along the main-stem Passaic River with Chatham cresting at 6.85 ft, Pine Brook at 21.52 ft, Singac at 12.42 ft, Millington at 8.23 ft, and Little Falls at 10.28 ft. These all exceeded their flood stages. Flooding occurred along the Rockaway River. Boonton above the dam crested at 4.71 ft and the gauge below the dam crested at 7.84 ft. The Ramapo River at Pompton Lakes flooded, cresting at 15.87 ft. The Pompton River also flooded at Pompton Plains, cresting at 21.21 ft. Again, all of these locations exceeded their flood stages.

Flood in SOMERSET, NEW JERSEY
From 18-DEC-23 11:00:00 to 19-DEC-23 14:00:00 (EST-5)
Location: PLUCKEMIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Across the Raritan Basin, flooding occurred on the mainstem Raritan River as well as the north and south branches. The Stanton gauge crested at 11.19 ft. The North Branch Raritan gauge crested at 13.35 ft. Bound Brook crested at 33.73 ft. Manville crested at 19.84 ft. On the Millstone River, Blackwell���s Mills crested at 14.22 ft. All of these locations exceeded their flood stages.

Flood in ATLANTIC, NEW JERSEY
From 18-DEC-23 06:15:00 to 18-DEC-23 09:00:00 (EST-5)
Location: HAMMONTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on NJ 54 in both directions between CR561 and US 30.

Flood in MIDDLESEX, NEW JERSEY
From 18-DEC-23 06:24:00 to 18-DEC-23 07:30:00 (EST-5)
Location: KINGSTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Flooding on US 1 at Raymond Road in South Brunswick Township.

Flood in HUNTERDON, NEW JERSEY
From 18-DEC-23 06:36:00 to 18-DEC-23 08:00:00 (EST-5)
Location: FLEMINGTON JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Rockafellows Mill Road closed due to flooding.

Flood in HUNTERDON, NEW JERSEY
From 18-DEC-23 06:36:00 to 18-DEC-23 08:00:00 (EST-5)
Location: SUNNYSIDE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Stanton Station Road closed due to flooding by Lilac Drive.

Flood in HUNTERDON, NEW JERSEY
From 18-DEC-23 06:36:00 to 18-DEC-23 08:00:00 (EST-5)
Location: PLEASANT RUN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Holland Brook Road closed due to flooding near the intersection with Cole Road.

Flood in HUNTERDON, NEW JERSEY
From 18-DEC-23 06:36:00 to 18-DEC-23 08:00:00 (EST-5)
Location: WHITEHOUSE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Lamington Road closed near the county line due to flooding.

Flood in MIDDLESEX, NEW JERSEY
From 18-DEC-23 08:00:00 to 18-DEC-23 11:00:00 (EST-5)
Location: MONMOUTH JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Multiple roads closed across South Brunswick Township including Route 1, Deans Lane, and Blackhorse Lane.

Flood in CAMDEN, NEW JERSEY
From 18-DEC-23 12:02:00 to 18-DEC-23 14:00:00 (EST-5)
Location: WINSLOW JCT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Egg Harbor Road closed due to flooding between Hall Street and Old Forks Road in Winslow Township.

Flood in MORRIS, NEW JERSEY
From 18-DEC-23 12:51:00 to 19-DEC-23 01:00:00 (EST-5)
Location: POMPTON PLAINS
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Route 23 was closed. Some residents evacuated from SE Pequannock.