Data health

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 RDYD1

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) · Reedy Point (IN MLLW) · Delaware Bay · -75.5717, 39.5583. Units ft; datum not supplied.

Source checked 2026-10-17 09:15:04.917Z · 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 RDYD1 (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.8.4-0.1ft10-17 07:00Z10-20 06:00Z
Observed stage and separate NWS forecast · 0 retained observations; 0 discontinuities. Dashed: NWS forecast issued 2026-10-17 07:09:00 UTC; forecast valid times are not observations. Lines join reported values only; missing intervals are not interpolated.

NWS forecast · current

Highest listed forecast: 7.4 ft at 2026-10-19 22:00:00 UTC; issued 2026-10-17 07:09:00 UTC. Minor flooding.

Forecasts are issued routinely year-round.

Gauge thresholds: action not set; minor 7.2 ft; moderate 8.2 ft; major 9.2 ft.

Forecast points (72) · issued 2026-10-17 07:09:00 UTC
Forecast valid time (UTC)Forecast Tide Height
2026-10-17 07:00:00 UTC4.3 ft
2026-10-17 08:00:00 UTC4.8 ft
2026-10-17 09:00:00 UTC4.8 ft
2026-10-17 10:00:00 UTC4.2 ft
2026-10-17 11:00:00 UTC3.2 ft
2026-10-17 12:00:00 UTC2.2 ft
2026-10-17 13:00:00 UTC1.5 ft
2026-10-17 14:00:00 UTC1.1 ft
2026-10-17 15:00:00 UTC0.9 ft
2026-10-17 16:00:00 UTC1.6 ft
2026-10-17 17:00:00 UTC2.9 ft
2026-10-17 18:00:00 UTC4.4 ft
2026-10-17 19:00:00 UTC5.3 ft
2026-10-17 20:00:00 UTC5.9 ft
2026-10-17 21:00:00 UTC6.1 ft
2026-10-17 22:00:00 UTC5.8 ft
2026-10-17 23:00:00 UTC4.9 ft
2026-10-18 00:00:00 UTC3.9 ft
2026-10-18 01:00:00 UTC3 ft
2026-10-18 02:00:00 UTC2.3 ft
2026-10-18 03:00:00 UTC1.8 ft
2026-10-18 04:00:00 UTC1.8 ft
2026-10-18 05:00:00 UTC2.4 ft
2026-10-18 06:00:00 UTC3.5 ft
2026-10-18 07:00:00 UTC4.5 ft
2026-10-18 08:00:00 UTC5.1 ft
2026-10-18 09:00:00 UTC5.5 ft
2026-10-18 10:00:00 UTC5.5 ft
2026-10-18 11:00:00 UTC5 ft
2026-10-18 12:00:00 UTC4 ft
2026-10-18 13:00:00 UTC3.1 ft
2026-10-18 14:00:00 UTC2.5 ft
2026-10-18 15:00:00 UTC2.2 ft
2026-10-18 16:00:00 UTC2.3 ft
2026-10-18 17:00:00 UTC3.1 ft
2026-10-18 18:00:00 UTC4.4 ft
2026-10-18 19:00:00 UTC5.7 ft
2026-10-18 20:00:00 UTC6.5 ft
2026-10-18 21:00:00 UTC7 ft
2026-10-18 22:00:00 UTC6.9 ft
2026-10-18 23:00:00 UTC6.4 ft
2026-10-19 00:00:00 UTC5.5 ft
2026-10-19 01:00:00 UTC4.5 ft
2026-10-19 02:00:00 UTC3.8 ft
2026-10-19 03:00:00 UTC3.1 ft
2026-10-19 04:00:00 UTC2.6 ft
2026-10-19 05:00:00 UTC2.7 ft
2026-10-19 06:00:00 UTC3.4 ft
2026-10-19 07:00:00 UTC4.5 ft
2026-10-19 08:00:00 UTC5.4 ft
2026-10-19 09:00:00 UTC6 ft
2026-10-19 10:00:00 UTC6.2 ft
2026-10-19 11:00:00 UTC6 ft
2026-10-19 12:00:00 UTC5.3 ft
2026-10-19 13:00:00 UTC4.4 ft
2026-10-19 14:00:00 UTC3.4 ft
2026-10-19 15:00:00 UTC2.9 ft
2026-10-19 16:00:00 UTC2.6 ft
2026-10-19 17:00:00 UTC2.8 ft
2026-10-19 18:00:00 UTC3.6 ft
2026-10-19 19:00:00 UTC4.9 ft
2026-10-19 20:00:00 UTC6.1 ft
2026-10-19 21:00:00 UTC7 ft
2026-10-19 22:00:00 UTC7.4 ft
2026-10-19 23:00:00 UTC7.3 ft
2026-10-20 00:00:00 UTC6.8 ft
2026-10-20 01:00:00 UTC5.9 ft
2026-10-20 02:00:00 UTC5 ft
2026-10-20 03:00:00 UTC4.1 ft
2026-10-20 04:00:00 UTC3.5 ft
2026-10-20 05:00:00 UTC3 ft
2026-10-20 06:00:00 UTC3.1 ft
NWS gauge impact statements
  • 9.24 ft: (Mean Lower Low Water (MLLW)) The level reached on April 16, 2011.
  • 9.2 ft: (MLLW) MAJOR FLOODING. At this level, widespread roadway flooding begins near the bay, the river and the tidal tributaries in New Castle County DE and Salem County NJ. Vulnerable homes and businesses may be 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.
  • 8.2 ft: (MLLW) MODERATE FLOODING. At this level, additional roadways near the bay, the river and the tidal tributaries in New Castle County DE and Salem County NJ begin to flood. 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.
  • 7.8 ft: (MLLW) Flooding begins along East 12th Street and along the south bank of the Christina River in Wilmington DE. Flooding begins where the Red Clay Creek, the White Clay Creek and the Christina River meet. The area is just to the west and northwest of the New Castle Airport and it includes the communities of Christiana, Glenville and Stanton DE. Flooding begins along the Appoquinimink River in Odessa DE. Flooding begins along NJ Route 49, Quinton-Alloway Road and Sickler Street in Quinton Township NJ.
  • 7.6 ft: (MLLW) Flooding begins along Oldmans Creek at US Route 130 and near Pedrickton NJ. Flooding begins in Penns Grove and Carneys Point NJ. Flooding begins along Riviera Drive and Hook Road in Pennsville Township NJ. Flooding begins along Pointers-Auburn Road in Mannington Township NJ. Flooding begins along NJ Route 45 at the Salem River. Flooding begins along Sinnicksons Landing Road and South Locust Avenue in Elsinboro Township NJ. Flooding begins along Beasley Neck Road in Lower Alloways Township NJ.
  • 7.5 ft: (MLLW) COASTAL FLOOD ADVISORY LEVEL.
  • 7.4 ft: (MLLW) Flooding begins in New Castle DE along the Strand and in the Dobbinsville section. Flooding begins along the section of DE Route 9 to the south of New Castle DE and around the approaches to the DE Route 9 bridge over the Red Lion Creek. Flooding begins in Delaware City DE including the area around the 5th Street bridge. Flooding begins in Port Penn, Augustine Beach and Bay View Beach DE. Flooding begins around the approaches to the DE Route 9 bridge over the Appoquinimink River.
  • 7.2 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

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

    Source status · Storm Mode