National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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RUSSIAN RIVER - HACIENDA BRIDGE (RIOC1)
Latitude: 38.51º NLongitude: 122.93º WElevation: 20 Feet
Location: Sonoma County in CaliforniaBulletin Group: Russian NapaRiver Group: Russian Napa
Issuance Time: Jan 01 2026 at 9:03 AM PSTNext Issuance: Jan 02 2026 at 9:00 AM PST
Action/Monitor: 31.0 FeetMinor Flood: 34.0 FeetModerate Flood: N/A Major Flood: N/A

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.
Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View US Geological Survey (USGS) Data for this station location.

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
Location Photographs
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Official 7 Day National Weather Service Forecast   (CAZ506)
Rest of Today: Showers. Highs in the 50s to lower 60s. Southeast winds 10 to 20 mph.

Tonight: Showers in the evening, then a chance of showers after midnight. Lows near 50. Southeast winds 10 to 20 mph.

Friday: Patchy dense fog in the morning. A chance of showers in the morning, then showers in the afternoon. Highs in the 50s. Southeast winds 10 to 20 mph with gusts to around 35 mph.

Friday Night: Showers. A slight chance of thunderstorms after midnight. Lows in the upper 40s to mid 50s. Southeast winds 10 to 20 mph with gusts to around 40 mph.

Saturday: Breezy. Showers and a slight chance of thunderstorms. Highs in the 50s. South winds 10 to 20 mph increasing to 20 to 30 mph in the afternoon.

Saturday Night: Showers and a slight chance of thunderstorms. Lows in the upper 40s to mid 50s.

Sunday and Sunday Night: Showers and a slight chance of thunderstorms. Highs in the 50s. Lows in the mid 40s to lower 50s.

Monday: Showers. Highs in the upper 40s to mid 50s.

Monday Night: Patchy fog. Showers likely. Lows in the 40s.

Tuesday: Mostly cloudy. A chance of showers. Highs in the upper 40s to mid 50s.

Tuesday Night: Mostly cloudy. Patchy fog. A slight chance of showers. Lows in the upper 30s to mid 40s.

Wednesday: Mostly cloudy. Patchy fog. A chance of showers. Highs in the upper 40s to mid 50s.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS San Francisco Bay Area-Monterey Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.