Napa River near St Helena CA
Is Napa River near St Helena CA flooding right now?
Napa River near St Helena CA measured 0.47 ft on 2026-09-11 01:45:00 UTC. That observation was 17.5 ft below its 18 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
0.47 ft
Streamflow
—
Minor flooding here begins at 18 ft, with major flooding at 22 ft. The highest crest on record was 23.61 ft on Sat, Dec 31, 2005.
Flood forecast
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 16 ft | 15.5 ft below |
| Minor flood | 18 ft | 17.5 ft below |
| Moderate flood | 20 ft | 19.5 ft below |
| Major flood | 22 ft | 21.5 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 23.61 ft | 2005-12-31 |
| 19.5 ft | 2019-02-27 |
| 19.2 ft | 2017-02-07 |
| 17.7 ft | 1997-01-01 |
| 17.47 ft | 1995-01-09 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Sonoma Creek a Kenwood CA | 8.6 mi | Sonoma County |
| Pope C a Walter Springs CA | 10.5 mi | Napa County |
| Brush C a Santa Rosa CA | 12.7 mi | Sonoma County |
| Napa River near Napa CA | 12.9 mi | Napa County |
| Sonoma C a Agua Caliente CA | 13.1 mi | Sonoma County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.