The combination of an onshore flow and higher than normal astronomical tides associated with the new moon caused widespread minor tidal flooding along the New Jersey coast during the evening high tide cycle on the 29th and sporadic minor tidal flooding with the two subsequent high tides. At the Atlantic City tide gage (Atlantic County), the highest tide reached 6.64 feet above mean lower low water at 848 p.m. EDT on the 29th. Minor tidal flooding starts at 6.0 feet above mean lower low water. At the Sandy Hook tide gage (Monmouth County), the highest tide reached 7.68 feet above mean lower low water at 924 p.m. EDT on the 29th. It just missed the moderate tidal flooding threshold level which is 7.70 feet above mean lower low water. At the Cape May Ferry tide gage (Cape May County), the highest tide reached 7.58 feet above mean lower low water at 817 p.m. EDT on the 29th. It just missed the moderate tidal flooding threshold level which is 7.70 feet above mean lower low water. The Watson Creek at Manasquan (Monmouth County) was above its 6 foot flood stage from 757 p.m. EDT through 1012 p.m. EDT on the 29th. It crested at 6.49 feet at 906 p.m. EDT on the 29th.
Tidal flooding was not restricted to the ocean front. The combination of freshwater runoff, onshore flow and high astronomical tides associated with the new moon caused moderate tidal flooding along the tidal Delaware River with the overnight high tide cycle on the 30th. In Camden County, tidal flooding extended through the Airport Circle along the Cooper River to Pennsauken Township. The Admiral Wilson Boulevard was also flooded along the Cooper River. The flooding damaged the ramps to the county boathouse in Pennsauken. In addition, U.S. Route 130 in Brooklawn was flooded near the Big Timber Creek. Vehicles were stuck in the flood waters. In Salem County, tidal flooding forced the closure of U.S. Route 130 over the Oldman's Creek. The onshore flow that started on the 29th caused minor tidal flooding in the Delaware River with both high tide cycles on the 30th. But, the combination of the residual onshore flow and the freshwater runoff caused moderate tidal flooding along the tidal Delaware River with the high tide cycle overnight on the 30th. The high tide in Philadelphia reached 9.94 feet above mean lower low water at 306 a.m. EDT on May 1st. Moderate tidal flooding starts at 9.2 feet above mean lower low water. This was the 7th highest tide on record along the Delaware River in Philadelphia. Farther south, the highest tide at Reedy Island (New Castle County) reached 8.25 feet above mean lower low water at 1254 a.m. EDT on May 1st. Moderate tidal flooding starts at 8.2 feet above mean lower low water.
The tidal flooding was caused by the combination of a strong high pressure system that built over the Canadian Maritimes that initiated the onshore flow and a strong, but slow moving low pressure system. The low pressure system was located in northwest Missouri on the morning of the 29th. It moved northeast to near Chicago during the afternoon of the 29th. The low pressure system then became nearly stationary in southern Wisconsin as its cold front reached Ohio early on the 30th. Then a new low pressure system developed on the frontal boundary and was over Eastern Tennessee on the morning of the 30th. The low pressure system reached West Virginia during the late afternoon on the 30th as its warm front started to move through Delmarva. The low pressure system reached north central Maryland at 11 p.m. EDT on the 30th as its warm front reached extreme southeast Pennsylvania and central New Jersey. The low pressure system reached the Allentown, Pennsylvania area at 5 a.m. EDT on May 1st and then was absorbed again into the frontal boundary associated with the original low as it moved into New York State that morning. The formation of the second low pressure system and the passage of the warm front helped veer the winds from the east to the southeast and enhanced the surface flow that produced the moderate coastal flooding along the tidal Delaware River.

Coastal Flood in CAMDEN, NEW JERSEY
From 30-APR-14 23:30:00 to 30-APR-14 23:59:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: WLON

Coastal Flood in GLOUCESTER, NEW JERSEY
From 30-APR-14 23:00:00 to 30-APR-14 23:59:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: WLON

Coastal Flood in SALEM, NEW JERSEY
From 30-APR-14 23:00:00 to 30-APR-14 23:59:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: WLON