For the second time within a week heavy rain fell across New Jersey, especially the northern half. An additional 2 to 5 inches of precipitation fell and caused continued flooding in the Passaic Basin and renewed flooding on the Delaware and Raritan Rivers. Snowmelt in the upper reaches of the Delaware Basin contributed to the flooding. Major flooding occurred within the Passaic Basin, mostly minor flooding occurred on the Delaware River and in the Raritan Basin. Governor Chris Christie declared a state of emergency before the start of the second round of heavy rain on March 9th.  Throughout the state, 683 dwellings were affected by both flooding events and 207 suffered at least major damage. The second round of rain started during the early morning of the 10th, fell heavy at times during the daylight hours and evening on the 10th and ended between 4 a.m. and 8 a.m. EST on the morning on the 11th. Eastern Daylight Time started on the morning of the 13th. Some of the rivers began flooding during Eastern Standard Time and receded after Eastern Daylight Time began.
South of Trenton on the Delaware River, the combination of the up the Delaware Bay and River wind flow and freshwater runoff produced minor tidal flooding along the river and tidal sections of its tributaries during the late afternoon high tide cycle on the 10th and the early morning high tide cycle on the 11th. The highest tide occurred on the 11th and reached 8.93 feet above mean lower low water in Philadelphia, Pennsylvania. Minor tidal flooding starts at 8.20 feet above mean lower low water.
The heavy rain was caused by a low pressure system that moved from the Southern Plains on the morning of the 8th northeast into Iowa on the morning of the 9th, Michigan on the morning of the 10th and into the eastern Great Lakes by the morning of the 11th. This system was able to tap moisture from both the Gulf of Mexico and Atlantic Ocean and lift it over its frontal boundaries. The deep southeast flow was able to enhance the precipitation further over the higher terrain of northwest New Jersey. The rain ended once the low's occluded front moved through New Jersey.

Flood in WARREN, NEW JERSEY
From 11-MAR-11 09:14:00 to 12-MAR-11 18:25:00 (EST-5)
Location: MILLBROOK
Flood cause: Heavy Rain / Snow Melt
Property damage: 700.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

Flooding along the Delaware River washed out eighty feet of River Road in Pohatcong Township. In Harmony Township, river flooding occurred along Hutchinson River Road. A few homes were surrounded and a few residents were evacuated from the flood waters. The Delaware River at Tocks Island was above its 21 foot flood stage from 416 p.m. EST on the 11th through 956 a.m. EST on the 12th. It crested at 22.88 feet at 1245 a.m. EST on the 11th. Farther downstream, the Delaware River at Phillipsburg had moderate flooding. The river was above its 22 foot flood stage from 914 a.m. EST on the 11th through 538 p.m. EST on the 12th. It crested at 26.11 feet at 1245 a.m. EST on the 12th. Farther downstream, the Delaware River at Riegelsville was above its 22 foot flood stage from 1041 a.m. EST on the 11th through 625 p.m. EST on the 12th. It crested at 25.20 feet at 145 a.m. EST on the 12th.
Event precipitation totals included 3.05 inches in Franklin, 2.88 inches in White, 2.76 inches in Oxford, 2.73 inches in Greenwich, 2.69 inches in Hackettstown, 2.51 inches in Stewartsville, 2.38 inches in Mansfield, 2.30 inches in Washington, 2.13 inches in Allamuchy, 2.01 inches in Blairstown, 1.87 inches in Hope and 1.85 inches in Liberty.

Flood in MERCER, NEW JERSEY
From 11-MAR-11 22:15:00 to 12-MAR-11 16:03:00 (EST-5)
Location: TRENTON
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Delaware River at Trenton was above its 20 foot flood stage from 1015 p.m. EST on the 11th through 403 p.m. EST on the 12th. It crested at 20.59 feet at 730 a.m. EST on the 12th. Event precipitation totals within the county included 1.66 inches in Lawrence, 1.54 inches in Pennington, 1.50 inches in Ewing, 1.37 inches in Trenton and 1.26 inches in Princeton.

Flood in MORRIS, NEW JERSEY
From 10-MAR-11 18:26:00 to 14-MAR-11 09:16:00 (EST-5)
Location: CHATHAM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The worst affected areas of eastern Morris County had continuous flooding that started on March 7th. Please refer to that stormdata entry for more details about the affected areas of Pequannock Township and Lincoln Park Borough. Elsewhere in Morris County, many roadways were closed and basements flooded.  In Dover, several roads were closed on both sides of the Rockaway River. This also affected the downtown area and Gardner Field. A garage housing the local school buses were flooded. A shelter was opened. In Boonton, flooding also occurred along the Rockaway River at Valley and Rockaway Valley Roads. Detours were needed to reach local businesses. In Parssipany, flooding along the Rockaway River closed sections of New and Vail Roads.
The Passaic River at Chatham was above its 6 foot flood stage from 948 p.m. EST on the 10th through 530 p.m. EDT on the 13th. It crested at 6.41 feet at 300 a.m. EST on the 11th. Farther downstream, the Passaic River at Pine Brook had major flooding. It went above its 19 foot flood stage from 430 p.m. EST on the 7th and did not fall below until 1245 a.m. EDT on the 18th. The highest crest was 22.04 feet at 1130 p.m. EST on the 12th and was the sixth highest crest on record. Farther downstream, the Passaic River at Circle Burners or Lincoln Park went above its 6 foot flood stage at 516 p.m. EST on the 7th and had its highest crest of 11.26 feet at 1115 p.m. EST on the 12th.
The Pompton River at Pompton Plains had major flooding and was above its 16 foot flood stage from 109 a.m. EST on the 11th through 1255 p.m. EDT on the 13th. It crested at 22.11 feet at 745 p.m.EST on the 11th. It was the 4th highest crest on record. Farther downstream, the Pompton River at Ryerson Road reached its 12 foot flood stage at 720 p.m. EST on the 10th. It crested at 18.66 feet at 215 a.m. EST on the 12th. Farther downstream, the Pompton River at Midwood Road rose above its 7.5 foot flood stage at 150 a.m. EST on the 7th and never went below before the next round of heavy rain arrived. Its second and highest crest reached 13.3 feet at 250 p.m. EST on the 11th before the gage became submerged. The actual crest in all likelihood was higher. Farther downstream, the Pompton River at the Mountainview Bridge had major flooding. It went above its 8 foot flood stage at 1 a.m. EST on the 11th and crested at 14.1 feet at 5 a.m. EST on the 12th.
The Pequannock River at the Macopin Dam had moderate flooding and was above its 5.5 foot flood stage from 857 p.m. EST on the 10th through 545 a.m. EDT on the 13th. It crested at 7.17 feet at 945 a.m.EST on the 8th. The Rockaway River above the Boonton Reservoir had major flooding and was above its 5 foot flood stage from 931 p.m. EST on the 10th through 352 p.m. EDT on the 13th. It crested at 7.03 feet at 1145 a.m.EST on the 11th. This was the third highest crest on record and the highest crest since April of 1984. The Rockaway River below the Boonton Reservoir had moderate flooding and was above its 5 foot flood stage from 821 p.m. EST on the 10th through 916 a.m. EDT on the 14th. It crested at 7.95 feet at 715 p.m.EST on the 11th. This was the eighth highest crest on record. The East Ditch at Beaver Brook Road had moderate flooding and was above its 2.5 foot flood stage from 626 p.m. EST on the 10th through 628 a.m. EST on the 12th. It crested at 4.56 feet at 530 a.m.EST on the 11th.
Second event precipitation totals included 5.01 inches in Jefferson, 4.79 inches in Milton, 4.64 inches in Rockaway, 4.20 inches in Butler, 3.81 inches in Denville, 3.53 inches in Pequannock, 3.47 inches in Parsippany, 3.17 inches in Boonton, 3.15 inches in Mount Olive, 3.01 inches in Randolph, 2.97 inches in long Hill, 2.84 inches in Chatham, 2.73 inches in Harding and 2.56 inches in Morristown.

Flood in SOMERSET, NEW JERSEY
From 10-MAR-11 21:52:00 to 12-MAR-11 22:26:00 (EST-5)
Location: SOUTH BRANCH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The South Branch of the Raritan River at the village of South Branch was above its 7 foot flood stage from 952 p.m. EST on the 10th through 924 p.m. EST on the 11th. It crested at 9.82 feet at 945 a.m.EST on the 11th. The main stem of the Raritan River at Manville was above its 14 foot flood stage from 924 a.m. EST through 745 p.m. EST on the 11th. It crested at 14.94 feet at 230 p.m. EST. Farther downstream, the main stem of the Raritan River at Bound Brook was above its 28 foot flood stage from 200 p.m. EST through 851 p.m. EST on the 11th. It crested at 28.49 feet at 515 p.m.EST on the 11th. The Millstone River at Griggstown had moderate flooding and was above its 10 foot flood stage from 306 a.m. EST on the 11th through 1026 p.m. EST on the 12th. It crested at 12.33 feet at 545 p.m.EST on the 11th. Farther downstream, the Millstone River at Blackwells Mills was above its 9 foot flood stage from 445 p.m. EST on the 11th through 200 a.m. EST on the 12th. It crested at 9.19 feet at 745 p.m.EST on the 11th.
Event precipitation totals included 3.19 inches in Basking Ridge, 2.42 inches in Bernards, 2.39 inches in Bedminster, 2.11 inches in Somerville, 2.08 inches in Bridgewater, 1.88 inches in Franklin, 1.78 inches in Hillsborough and 1.62 inches in Montgomery.

Flood in SUSSEX, NEW JERSEY
From 11-MAR-11 09:56:00 to 11-MAR-11 20:37:00 (EST-5)
Location: FLATBROOKVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Flat Brook at Flatbrookville was above its 6 foot flood stage from 956 a.m. EST through 837 p.m. EST on the 11th. It crested at 6.46 feet at 215 p.m. EST. Event precipitation totals included 3.18 inches in Sparta, 2.61 inches in Walpack, 2.54 inches in Wantage, 2.42 inches in Flatbrookville, 2.29 inches in Vernon and 2.23 inches in Andover.

Flood in HUNTERDON, NEW JERSEY
From 10-MAR-11 23:58:00 to 12-MAR-11 16:15:00 (EST-5)
Location: HOLLAND
Flood cause: Heavy Rain / Snow Melt
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

In Frenchtown, flooding along the Delaware River closed portions of River Road and South Washington Street until the 14th.  In Clinton, the South Branch of the Raritan River flooded Red Mill Park. The Delaware River at Frenchtown was above its 16 foot flood stage from 330 p.m. EST on the 11th through 348 p.m. EST on the 12th. It crested at 17.21 feet at 300 a.m. EST on the 11th. Farther downstream, the Delaware River at Stockton was above its 18 foot flood stage from 622 p.m. EST on the 11th through 415 p.m. EST on the 12th. It crested at 19.14 feet at 515 a.m. EST on the 12th. Farther downstream, the Delaware River at Lambertville was above its 13 foot flood stage from 340 a.m. EST through 755 a.m. EST on the 12th. It crested at 13.07 feet at 530 a.m. EST. The South Branch of the Raritan River at High Bridge was above its 10 foot flood stage from 345 a.m. EST through 745 a.m. EST on the 11th. It crested at 10.02 feet at 545 a.m. EST. Farther downstream, the South Branch of the Raritan River at Stanton was above its 8 foot flood stage from 1158 p.m. EST on the 10th through 421 p.m. EST on the 11th. It crested at 9.21 feet at 545 a.m.EST on the 11th.
Event precipitation totals included 3.59 inches in Califon, 3.36 inches in Clinton, 3.22 inches in Franklin, 3.07 inches in High Bridge, 2.98 inches in Lebanon, 2.62 inches in Bethlehem, 2.35 inches in Stockton, 2.30 inches in Lebanon and 2.01 inches in Flemington.