The late-September nor'easter was weakening by Monday afternoon, but the story along parts of the Northeast coast was still the next high tide. Water that had already reached streets and homes over the weekend could linger in back bays even as the strongest wind and rain moved away.

Associated Press reporting described flooding in low-lying New Jersey shore communities, downed trees on Long Island and widespread travel disruption. More than 100,000 customers across the Northeast and mid-Atlantic had been without power at points on Sunday, the AP reported, a changing count that should not be mistaken for Monday's total. One New York City Housing Authority worker was killed when a tree fell Saturday. The storm's effects were uneven: conditions on one street did not necessarily describe the next neighborhood.

Why the water kept returning

A nor'easter can push Atlantic water toward the coast for many hours. When that happens, drainage during low tide may be incomplete before the next high tide arrives. Sea Bright, New Jersey, was among the places where residents described repeated inundation rather than one short burst of water. For people trying to dry a garage or reopen a road, timing becomes as important as the storm's headline strength. A weakening center does not immediately clear every flooded block.

The National Weather Service office serving New Jersey and Delaware said Monday afternoon that the storm was slowly departing and that the coastal flooding threat had eased in many areas. It still identified the back bays of New Jersey and Delaware as a concern. A New York forecast discussion issued later Monday also warned that water levels could approach minor flood thresholds over the following couple of days in parts of Long Island's south shore back bays. Those are location-specific forecasts, not a prediction of another region-wide disaster.

Damage and disruption were broader than rain

The AP reported tidal surges in New Jersey, fallen utility poles on Long Island and flight cancellations during the weekend. Wind-driven surf also raised concerns about beach and dune erosion. A blocked road can interrupt work, school, deliveries and medical trips long after water recedes. Power restoration depends on crews reaching damaged lines safely; a utility map may update much faster than conditions at an individual address. Residents should rely on local emergency notices for current closures and service estimates.

The weather service noted that the system was expected to pull away through Monday night into Tuesday. That forecast offers a path toward improvement, but it does not erase saturated ground, debris or damage to electrical equipment. A basement that looks dry at midday can face another tide cycle. Drivers should avoid water of unknown depth, and property owners should check local guidance before operating wet electrical systems. These are practical consequences of the reported coastal flooding, not evidence that every community faces the same level of risk.

A narrower forecast by Monday

By Monday afternoon, forecasters were reducing some warnings and advisories as conditions improved. The Mount Holly office said the threat had lowered across many zones while remaining along back bays. The New York office described lighter rain and drizzle tapering off, with the storm center south of Montauk that afternoon. That shift matters: broad weekend descriptions are useful for understanding what happened, but the most recent local forecast is the better guide for Tuesday plans.

Residents can compare three signals as the system exits: the next high-tide time, the latest coastal-flood statement for their shore segment, and local road or utility updates. The distinction between a warning, advisory and statement also matters because each describes a different expected impact. The storm illustrates how a coastal event can have two endings: winds quiet down first, then water and cleanup work follow. Treating those as separate stages gives communities a clearer account of what remains to be done.

The difference between regional and local evidence is especially important after a long storm. A photo from a flooded shore town confirms that water reached that place at that time; it does not prove the same depth elsewhere. Similarly, a single outage count can describe a peak without showing how many homes remained dark the next morning. Forecast offices update tide and impact expectations as observations arrive. For residents, that means checking the statement for their exact coast before driving or beginning cleanup. For readers farther away, it means separating the documented weekend damage from Monday's narrower forecast instead of carrying the most alarming conditions forward without an update.

Next checkpoint

What to watch

Local National Weather Service coastal-flood statements, road closures and utility restoration notices as the storm exits Tuesday.

Evidence

Sources and editorial notes

This September 29 account uses Associated Press reporting from September 27 and National Weather Service forecast discussions issued September 28. Forecasts and outage counts can change.

Spot an error? Read our corrections policy.

nor'eastercoastal floodingNew JerseyNew EnglandNational Weather Service