Stage and discharge
Hourly readings and linked forecast values
Observed Forecast
Stage and discharge chart includes 4 observed points and 18 forecast points.
Flood-stage context
Source-published thresholds where available
Action17 ftSource-backed threshold
Minor flood20 ftSource-backed threshold
Moderate flood23 ftSource-backed threshold
Major flood28 ftSource-backed threshold
Forecast
Linked NWS/NWPS values
HGIFF • stage23.3 ftValid Sep 3, 2026 at 7:00 AM CDT
HGIFF • stage23.9 ftValid Sep 3, 2026 at 1:00 PM CDT
HGIFF • stage25.5 ftValid Sep 3, 2026 at 7:00 PM CDT
status • stage27 ftValid Sep 4, 2026 at 1:00 AM CDT
HGIFF • stage27 ftValid Sep 4, 2026 at 1:00 AM CDT
HGIFF • stage25.6 ftValid Sep 4, 2026 at 7:00 AM CDT
Observations
Stage
10.35 ft
Observed Sep 2, 2026 at 7:15 AM CDT
Stage
8.63 ft
Observed Aug 31, 2026 at 11:15 AM CDT
Stage
8.61 ft
Observed Aug 31, 2026 at 6:15 AM CDT
Stage
8.65 ft
Observed Aug 29, 2026 at 7:15 PM CDT
Alerts
Flood Warning
Flood Warning issued September 3 at 2:30AM CDT until September 5 at 11:43AM CDT by NWS Houston/Galveston TX
Effective Sep 3, 2026 at 2:30 AM CDT - Expires Sep 5, 2026 at 11:43 AM CDT
Open official alertFlood Warning
Flood Warning issued September 2 at 10:56AM CDT until September 5 at 12:00PM CDT by NWS Houston/Galveston TX
Effective Sep 2, 2026 at 10:56 AM CDT - Expires Sep 5, 2026 at 12:00 PM CDT
Open official alertOfficial public sources
Readings and thresholds stay tied to USGS, NOAA/NWS, or source-backed records.
Source freshness
Observed and fetched timestamps are shown separately when the API returns them.
Transparent methodology
Unavailable forecasts, alerts, and thresholds are shown as unavailable states.