Heavy rain that fell during the first half of the day on the 25th caused some river and poor drainage flooding in New Jersey. Most of the river flooding occurred in Somerset and Morris Counties. Event precipitation totals averaged 1.5 to 3 inches, but most of it fell between 6 a.m. and Noon EST. The rain began falling intermittently during the late afternoon and evening of the 24th and became steadier toward morning. The steady rain ended during the early afternoon on the 25th.
The heavy rain was caused by a strong south flow from the Gulf of Mexico. A low pressure system formed over the Gulf Coast states on the morning of the 24th and moved just east of the Appalachians and passed through Maryland and Pennsylvania during the morning of the 25th. The strong south flow and rain ended after its cold front moved through New Jersey during the afternoon of the 25th.

Flood in CAMDEN, NEW JERSEY
From 25-JAN-10 13:29:00 to 25-JAN-10 16:45:00 (EST-5)
Location: HADDONFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The combination of tidal and fresh water flooding along the Cooper River caused the Admiral Wilson Boulevard to be restricted to one lane in both directions for most of the day on the 25th. Poor drainage flooding was also reported along River Road in Camden.
The Cooper River at Haddonfield was above its 2.8 foot flood stage from 129 p.m. EST through 445 p.m. EST on the 25th. It crested at 2.87 feet at 230 p.m. EST. The Delaware River in Philadelphia, Pennsylvania reached 8.30 feet above mean lower low water at 906 a.m. EST on the 25th. Minor tidal flooding starts at 8.2 feet above mean lower low water. Precipitation totals included 1.53 inches in Merchantville, 1.49 inches in Berlin Township and 1.35 inches in Winslow Township.

Flood in SOMERSET, NEW JERSEY
From 25-JAN-10 14:08:00 to 27-JAN-10 00:56:00 (EST-5)
Location: NORTH BRANCH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Millstone River at Griggstown was above its 10 foot flood stage 415 p.m. EST on the 25th through 1256 a.m. EST on the 27th. It crested at 12.18 feet at 5 a.m. EST on the 26th. The North Branch of the Raritan River at North Branch was above its 12.3 foot flood stage from 710 p.m. EST through 749 p.m. EST on the 25th. It crested at 12.33 feet at 730 p.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 208 p.m. EST on the 25th through 247 a.m. EST on the 26th. It crested at 9.19 feet at 10 p.m. EST on the 25th.
Event precipitation totals included 1.95 inches in Hillsborough Township, 1.84 inches in Bridgewater Township, 1.83 inches in Montgomery Township, 1.79 inches in Franklin Township and 1.73 inches in Bedminster Township.

Flood in MORRIS, NEW JERSEY
From 25-JAN-10 22:12:00 to 27-JAN-10 05:00:00 (EST-5)
Location: LAKE HIAWATHA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Rockaway River above the Boonton Reservoir was above its 5 foot flood stage from 1012 p.m. EST on the 25th through 718 a.m. EST on the 26th. It crested at 5.14 feet at 1 a.m. EST on the 26th. The Rockaway River below the Boonton Reservoir was above its 5 foot flood stage from 1133 p.m. EST on the 25th through 5 a.m. EST on the 27th. It crested at 6.00 feet at 830 a.m. EST on the 26th. The Pequannock River at the Macopin Dam was above its 5.5 foot flood stage from Midnight EST through 1130 a.m. EST on the 26th. It crested at 5.53 feet at 115 a.m. EST.
Event precipitation totals included 2.88 inches in Middle Valley, 2.85 inches in Chester Township, 2.64 inches in Randolph Township, 2.61 inches in Denville, 2.57 inches in Rockaway and Roxbury Townships, 2.38 inches in Mount Olive Township, 2.20 inches in Mendham Township, 2.08 inches in Harding Township, 2.07 inches in Morris Township, 1.98 inches in Long Hill Township and 1.80 inches in Parsippany.