Napa River near St. Helena
Critical Stages
16' - Action
18' - Flood
20' - Moderate
22' - Major
Latest Observation
Updated: 6:00 AM PST 12/5/25
Status: No Flooding
Stage: 1.3 ft
Flow: -999 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 7 AM 12/5 | 1.33 | 0 |
| 8 AM 12/5 | 1.33 | 0 |
| 9 AM 12/5 | 1.33 | 0 |
| 10 AM 12/5 | 1.33 | 0 |
| 11 AM 12/5 | 1.33 | 0 |
| 12 PM 12/5 | 1.33 | 0 |
| 1 PM 12/5 | 1.33 | 0 |
| 2 PM 12/5 | 1.33 | 0 |
| 3 PM 12/5 | 1.33 | 0 |
| 4 PM 12/5 | 1.33 | 0 |
| 5 PM 12/5 | 1.33 | 0 |
| 6 PM 12/5 | 1.33 | 0 |
| 7 PM 12/5 | 1.33 | 0 |
| 8 PM 12/5 | 1.33 | 0 |
| 9 PM 12/5 | 1.33 | 0 |
| 10 PM 12/5 | 1.33 | 0 |
| 11 PM 12/5 | 1.33 | 0 |
| 12 AM 12/6 | 1.33 | 0 |
| 1 AM 12/6 | 1.33 | 0 |
| 2 AM 12/6 | 1.33 | 0 |
| 3 AM 12/6 | 1.33 | 0 |
| 4 AM 12/6 | 1.33 | 0 |
| 5 AM 12/6 | 1.33 | 0 |
| 6 AM 12/6 | 1.33 | 0 |
| 7 AM 12/6 | 1.33 | 0 |
| 8 AM 12/6 | 1.33 | 0 |
| 9 AM 12/6 | 1.33 | 0 |
| 10 AM 12/6 | 1.33 | 0 |
| 11 AM 12/6 | 1.33 | 0 |
| 12 PM 12/6 | 1.33 | 0 |
| 1 PM 12/6 | 1.33 | 0 |
| 2 PM 12/6 | 1.33 | 0 |
| 3 PM 12/6 | 1.33 | 0 |
| 4 PM 12/6 | 1.33 | 0 |
| 5 PM 12/6 | 1.33 | 0 |
| 6 PM 12/6 | 1.33 | 0 |
| 7 PM 12/6 | 1.33 | 0 |
| 8 PM 12/6 | 1.33 | 0 |
| 9 PM 12/6 | 1.33 | 0 |
| 10 PM 12/6 | 1.33 | 0 |
| 11 PM 12/6 | 1.33 | 0 |
| 12 AM 12/7 | 1.33 | 0 |
| 1 AM 12/7 | 1.33 | 0 |
| 2 AM 12/7 | 1.33 | 0 |
| 3 AM 12/7 | 1.33 | 0 |
| 4 AM 12/7 | 1.33 | 0 |
| 5 AM 12/7 | 1.33 | 0 |
| 6 AM 12/7 | 1.33 | 0 |
| 7 AM 12/7 | 1.33 | 0 |
| 8 AM 12/7 | 1.33 | 0 |
| 9 AM 12/7 | 1.33 | 0 |
| 10 AM 12/7 | 1.33 | 0 |
| 11 AM 12/7 | 1.33 | 0 |
| 12 PM 12/7 | 1.33 | 0 |
| 1 PM 12/7 | 1.33 | 0 |
| 2 PM 12/7 | 1.33 | 0 |
| 3 PM 12/7 | 1.33 | 0 |
| 4 PM 12/7 | 1.33 | 0 |
| 5 PM 12/7 | 1.33 | 0 |
| 6 PM 12/7 | 1.33 | 0 |
| 7 PM 12/7 | 1.33 | 0 |
| 8 PM 12/7 | 1.33 | 0 |
| 9 PM 12/7 | 1.33 | 0 |
| 10 PM 12/7 | 1.33 | 0 |
| 11 PM 12/7 | 1.33 | 0 |
| 12 AM 12/8 | 1.33 | 0 |
| 1 AM 12/8 | 1.33 | 0 |
| 2 AM 12/8 | 1.33 | 0 |
| 3 AM 12/8 | 1.33 | 0 |
| 4 AM 12/8 | 1.33 | 0 |
| 5 AM 12/8 | 1.33 | 0 |
| 6 AM 12/8 | 1.33 | 0 |
| 7 AM 12/8 | 1.33 | 0 |
| 8 AM 12/8 | 1.33 | 0 |
| 9 AM 12/8 | 1.33 | 0 |
| 10 AM 12/8 | 1.33 | 0 |
| 11 AM 12/8 | 1.33 | 0 |
| 12 PM 12/8 | 1.33 | 0 |
| 1 PM 12/8 | 1.33 | 0 |
| 2 PM 12/8 | 1.33 | 0 |
| 3 PM 12/8 | 1.33 | 0 |
| 4 PM 12/8 | 1.33 | 0 |
| 5 PM 12/8 | 1.33 | 0 |
| 6 PM 12/8 | 1.33 | 0 |
| 7 PM 12/8 | 1.33 | 0 |
| 8 PM 12/8 | 1.33 | 0 |
| 9 PM 12/8 | 1.33 | 0 |
| 10 PM 12/8 | 1.33 | 0 |
| 11 PM 12/8 | 1.33 | 0 |
| 12 AM 12/9 | 1.33 | 0 |
| 1 AM 12/9 | 1.33 | 0 |
| 2 AM 12/9 | 1.33 | 0 |
| 3 AM 12/9 | 1.33 | 0 |
| 4 AM 12/9 | 1.33 | 0 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 6:30 AM 12/5 | 1.3 | -999 |
| 6:15 AM 12/5 | 1.3 | -999 |
| 6:00 AM 12/5 | 1.3 | -999 |
| 5:45 AM 12/5 | 1.29 | -999 |
| 5:30 AM 12/5 | 1.3 | -999 |
| 5:15 AM 12/5 | 1.3 | -999 |
| 5:00 AM 12/5 | 1.3 | -999 |
| 4:45 AM 12/5 | 1.29 | -999 |
| 4:30 AM 12/5 | 1.29 | -999 |
| 4:15 AM 12/5 | 1.3 | -999 |
| 4:00 AM 12/5 | 1.3 | -999 |
| 3:45 AM 12/5 | 1.29 | -999 |
| 3:30 AM 12/5 | 1.29 | -999 |
| 3:15 AM 12/5 | 1.29 | -999 |
| 3:00 AM 12/5 | 1.3 | -999 |
| 2:45 AM 12/5 | 1.29 | -999 |
| 2:30 AM 12/5 | 1.29 | -999 |
| 2:15 AM 12/5 | 1.29 | -999 |
| 2:00 AM 12/5 | 1.29 | -999 |
| 1:45 AM 12/5 | 1.29 | -999 |
| 1:30 AM 12/5 | 1.29 | -999 |
| 1:15 AM 12/5 | 1.29 | -999 |
| 1:00 AM 12/5 | 1.29 | -999 |
| 12:45 AM 12/5 | 1.29 | -999 |
| 12:30 AM 12/5 | 1.29 | -999 |
| 12:15 AM 12/5 | 1.29 | -999 |
| 12:00 AM 12/5 | 1.29 | -999 |
| 11:45 PM 12/4 | 1.29 | -999 |
| 11:30 PM 12/4 | 1.29 | -999 |
| 11:15 PM 12/4 | 1.29 | -999 |
24' -
Disastrous Flooding. Widespread flooding across upper Napa Valley with travel essentially impossible. The peak water level during the flood of 12/31/2005 measured 23.6 feet.
22' -
Major Flood Stage. Major flooding throughout the upper Napa Valley with most roads inundated, making travel extremely difficult and unsafe.
20' -
Moderate Flood Stage. Moderate flooding of the lower portions of Silverado Trail along the reach. Inundation of low lying residential areas along the east river bank in the vicinity of Pope Street Bridge. Secondary and many primary roads inundated; most major cross roads inundated and unsafe to pass.
18' -
Minor Flood Stage. Minor flooding of low lying agricultural areas along river begins. Low lying rural residential areas immediately adjacent to the river and some secondary roads affected.
16' -
Monitor Stage. WFO Monterey may issue a Flood Watch-based products to cover Napa Valley regional flood potential at this stage.
| Date | Stage (ft) |
|---|---|
| Dec 31, 2005 | 23.61 |
| Feb 27, 2019 | 19.5 |
| Feb 7, 2017 | 19.2 |
| Jan 1, 1997 | 17.7 |
| Jan 9, 1995 | 17.47 |
| Jan 22, 1997 | 17 |
| Dec 23, 2012 | 16.87 |
| Oct 24, 2021 | 16.82 |
| Mar 13, 1983 | 16.79 |
| Jan 9, 2023 | 16.71 |
| Jan 20, 1993 | 16.67 |
| Mar 10, 2023 | 16.61 |
| Feb 21, 1998 | 16.6 |
| Dec 16, 2002 | 16.47 |
| Dec 19, 1981 | 16.3 |
| Jan 16, 1978 | 16.19 |
| Dec 11, 2014 | 15.63 |
| Dec 25, 1983 | 15.46 |
| Jan 31, 1963 | 15.3 |
| Dec 22, 1955 | 15.17 |
Data provided by the National Weather Service.
