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 GRRT2

current · Observed 9.89 ft at 2026-10-17 09:54:00 UTC · Major flooding.

Tide gauge (coastal water level) · Galveston Railroad Bridge · Tide Station (HGX) · -94.8966, 29.3016. Units ft; datum not supplied.

Source checked 2026-10-17 12:45:05.272Z · 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: 1; target 24 hours, at most 96 reports per station. Recording began 2026-10-17 06:15:05.234Z; oldest available reading 2026-10-17 09:54:00 UTC.

Observed stage and separate NWS forecast at GRRT2 (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.10.98.9ft10-17 09:54Z10-17 10:54Z2026-10-17 09:54:00 UTC · 9.89 ft
Observed stage and separate NWS forecast · 1 retained observations; 0 discontinuities. Lines join reported values only; missing intervals are not interpolated.

NWS forecast · current

No forecast maximum supplied.

Forecasts are issued routinely year-round.

Gauge thresholds: action 3.25 ft; minor 3.5 ft; moderate 4 ft; major 4.5 ft.

Forecast points (0) · issued 2026-10-17 00:00:00 UTC
Forecast valid time (UTC)Forecast Tide Height
Observed reports as a table (1)
Observed (UTC)Stage / unitsSource category / water
2026-10-17 09:54:00 UTC9.89 ftMajor flooding · Tide gauge (coastal water level)
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.

  • Observed 2026-10-17 09:54:00 UTC, captured 2026-10-17 11:05:09.398Z; source body SHA-256 cbfb354adb92b821254e0b097a7b6ce494a1f9a55b161e0f970a7c89ce5ad67e.

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

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

Source status · Storm Mode