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Storm Mode / Observations

Station and river observations

METAR/SPECI uses the existing AviationWeather.gov bulk cache over the lower 48 and its margin. NWPS retains only gauges in the existing action-stage-or-above observed list; forecast-only gauges can have no observation. Absence never establishes zero wind, low water, or safe conditions.

Water-level gauge ONCN4

unavailable · No observation in the latest cached source list. Retained readings below are historical; an absent gauge may have fallen below action stage or stopped reporting.

Tide gauge (coastal water level) · Ocean City (IN MLLW) · Great Egg Harbor Bay · -74.5756, 39.2858. Units ft; datum not supplied.

Source checked 2026-10-17 08:05:04.044Z · current.

Stage in this gauge’s units, not a regional flood depth. Tide/lake gauges remain water levels; datum is not supplied by this feed. Historical observations and the latest forecast keep separate times.

Retained observations: 0; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:05.234Z; oldest available reading none.

Observed stage and separate NWS forecast at ONCN4 (ft)Dots are retained observations. Lines break for missing fields, long intervals or changed station location or units. 0 recorded discontinuities. Dashed lines, when present, are the separately issued NWS forecast.6.50.5ft10-16 19:00Z10-19 18:00Z
Observed stage and separate NWS forecast · 0 retained observations; 0 discontinuities. Dashed: NWS forecast issued 2026-10-16 19:44:00 UTC; forecast valid times are not observations. Lines join reported values only; missing intervals are not interpolated.

NWS forecast · current

Highest listed forecast: 5.5 ft at 2026-10-19 18:00:00 UTC; issued 2026-10-16 19:44:00 UTC. Minor flooding.

Forecasts are issued routinely year-round.

Gauge thresholds: action not set; minor 5.3 ft; moderate 6.3 ft; major 7.3 ft.

Forecast points (72) · issued 2026-10-16 19:44:00 UTC
Forecast valid time (UTC)Forecast Tide Height
2026-10-16 19:00:00 UTC3.6 ft
2026-10-16 20:00:00 UTC3 ft
2026-10-16 21:00:00 UTC2.3 ft
2026-10-16 22:00:00 UTC1.9 ft
2026-10-16 23:00:00 UTC1.5 ft
2026-10-17 00:00:00 UTC1.6 ft
2026-10-17 01:00:00 UTC2 ft
2026-10-17 02:00:00 UTC2.4 ft
2026-10-17 03:00:00 UTC2.9 ft
2026-10-17 04:00:00 UTC3.1 ft
2026-10-17 05:00:00 UTC3.3 ft
2026-10-17 06:00:00 UTC3 ft
2026-10-17 07:00:00 UTC2.5 ft
2026-10-17 08:00:00 UTC2.1 ft
2026-10-17 09:00:00 UTC1.8 ft
2026-10-17 10:00:00 UTC1.5 ft
2026-10-17 11:00:00 UTC1.5 ft
2026-10-17 12:00:00 UTC1.6 ft
2026-10-17 13:00:00 UTC2.2 ft
2026-10-17 14:00:00 UTC2.7 ft
2026-10-17 15:00:00 UTC3.4 ft
2026-10-17 16:00:00 UTC4 ft
2026-10-17 17:00:00 UTC4.3 ft
2026-10-17 18:00:00 UTC4.3 ft
2026-10-17 19:00:00 UTC4 ft
2026-10-17 20:00:00 UTC3.4 ft
2026-10-17 21:00:00 UTC3 ft
2026-10-17 22:00:00 UTC2.4 ft
2026-10-17 23:00:00 UTC2.2 ft
2026-10-18 00:00:00 UTC1.9 ft
2026-10-18 01:00:00 UTC2 ft
2026-10-18 02:00:00 UTC2.5 ft
2026-10-18 03:00:00 UTC2.9 ft
2026-10-18 04:00:00 UTC3.4 ft
2026-10-18 05:00:00 UTC3.8 ft
2026-10-18 06:00:00 UTC3.9 ft
2026-10-18 07:00:00 UTC3.7 ft
2026-10-18 08:00:00 UTC3.3 ft
2026-10-18 09:00:00 UTC2.9 ft
2026-10-18 10:00:00 UTC2.6 ft
2026-10-18 11:00:00 UTC2.4 ft
2026-10-18 12:00:00 UTC2.4 ft
2026-10-18 13:00:00 UTC2.5 ft
2026-10-18 14:00:00 UTC3 ft
2026-10-18 15:00:00 UTC3.5 ft
2026-10-18 16:00:00 UTC4.1 ft
2026-10-18 17:00:00 UTC4.7 ft
2026-10-18 18:00:00 UTC4.9 ft
2026-10-18 19:00:00 UTC5 ft
2026-10-18 20:00:00 UTC4.6 ft
2026-10-18 21:00:00 UTC4.1 ft
2026-10-18 22:00:00 UTC3.6 ft
2026-10-18 23:00:00 UTC3.2 ft
2026-10-19 00:00:00 UTC2.8 ft
2026-10-19 01:00:00 UTC2.6 ft
2026-10-19 02:00:00 UTC2.7 ft
2026-10-19 03:00:00 UTC3.2 ft
2026-10-19 04:00:00 UTC3.6 ft
2026-10-19 05:00:00 UTC4.2 ft
2026-10-19 06:00:00 UTC4.5 ft
2026-10-19 07:00:00 UTC4.6 ft
2026-10-19 08:00:00 UTC4.4 ft
2026-10-19 09:00:00 UTC4.2 ft
2026-10-19 10:00:00 UTC3.7 ft
2026-10-19 11:00:00 UTC3.4 ft
2026-10-19 12:00:00 UTC3.2 ft
2026-10-19 13:00:00 UTC3.2 ft
2026-10-19 14:00:00 UTC3.3 ft
2026-10-19 15:00:00 UTC3.8 ft
2026-10-19 16:00:00 UTC4.3 ft
2026-10-19 17:00:00 UTC4.9 ft
2026-10-19 18:00:00 UTC5.5 ft
NWS gauge impact statements
  • 9.95 ft: (Mean Lower Low Water (MLLW)) The level reached during the northeaster on December 11, 1992.
  • 9.31 ft: (MLLW) The level reached on October 29, 2012 during Post Tropical Cyclone Sandy.
  • 7.75 ft: (MLLW) The level reached on January 23, 2016.
  • 7.3 ft: (MLLW) MAJOR FLOODING. At this level, flooding starts to become severe enough to begin causing structural damage along with widespread flooding of roadways in Ocean City and Somers Point. Vulnerable homes and businesses may be sevrely damaged as water levels rise further above this threshold. Numerous roads become impassable and some neighborhoods may be isolated. The flood waters become a danger to anyone who attempts to cross on foot or in a vehicle.
  • 6.3 ft: (MLLW) MODERATE FLOODING. At this level, widespread flooding of roadways begins due to high water and/or wave action with many roads becoming impassable in Ocean City and Somers Point. Lives may be at risk when people put themselves in harm's way. Some damage to vulnerable structures may begin to occur. COASTAL FLOOD WARNING LEVEL.
  • 6.1 ft: (MLLW) Flooding begins along Longport Boulevard (NJ Route 152) between Somers Point and Longport, along Mays Landing Road in Somers Point (the section between US Route 9 and NJ Route 52), and on Ocean Drive leading to the north end of the Ocean City-Longport Bridge. Flooding begins on the access roads to the 34th Street bridge in Ocean City (Cape May County Route 623). Bayside flooding begins in Ocean City from 34th Street to 55th Street, including West Avenue.
  • 5.7 ft: (MLLW) Flooding begins along Bay Avenue in Somers Point. Flooding begins in Strathmere.
  • 5.6 ft: (MLLW) COASTAL FLOOD ADVISORY LEVEL.
  • 5.3 ft: (MLLW) MINOR FLOODING.
Observed reports as a table (0)
Observed (UTC)Stage / unitsSource category / water
No retained observations.
Capture times, quality and provenance

Each report keeps its observation time, first capture of this version, and the SHA-256 of the source bulk body. Corrections at the same observation time replace that point and are marked; unrelated bulk-file changes do not freshen a report.

    Only observed gauge records enter this history. Forecast maxima and forecast hydrograph points never become observations. A missing datum or unsupported flow value remains unknown.

    Observation source page · Cached readings as JSON · Official source

    Gauges in the latest cached source

    107 total · source current; checked . Showing 100 on page 1. 0 gauges have suspect readings set aside.

    Source status · Storm Mode