CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

LAGUNA DE SANTA ROSA - SEBASTOPOL (LSEC1)

Latitude: 38.43º N	Longitude: 122.83º W	Elevation: 50 Feet
Location: Sonoma County in California		Bulletin Group: Russian Napa		River Group: Russian Napa

Issuance Time:

Dec 25 2025 at 1:11 PM PST

Next Issuance:

Dec 26 2025 at 9:00 AM PST

Action/Monitor: 67.0 Feet

Minor Flood: 69.0 Feet

Moderate Flood: N/A

Major Flood: N/A

Please Note:

Stage forecasts at this location are uncertain due to backwater effects.

Plot Type:

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
	Raw streamflow data is provided by the US Geological Survey (USGS). View US Geological Survey (USGS) Data for this station location.

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
69.0 Feet	Minor Flooding. Occidental Road begins flooding near the channel margin. NWS will issue an Urban/Small Stream Advisory, if not yet already issued.
67.0 Feet	Monitor Stage. NWS may issue a Flash Flood Watch, if not yet already issued.

Official 7 Day National Weather Service Forecast (CAZ506)

rest of Tonight: Breezy. Showers likely late in the evening. A slight chance of thunderstorms. A chance of showers after midnight. Some thunderstorms may be severe with heavy rainfall. Lows in the 40s to lower 50s. Southwest winds 20 to 30 mph and Becoming south 10 to 20 mph after midnight. Gusts up to 45 mph.

Friday: Showers. A slight chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Highs in the 40s to upper 50s. South winds 10 to 20 mph.

Friday Night: Mostly cloudy in the evening then becoming partly cloudy. A chance of showers and a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows in the 30s to upper 40s. Southwest winds 5 to 10 mph and Becoming northwest after midnight.

Saturday: Partly cloudy in the morning then becoming sunny. A slight chance of showers in the morning. Highs in the upper 40s to mid 50s. North winds 5 to 10 mph. Chance of showers 20 percent.

Saturday Night: Mostly clear in the evening then becoming partly cloudy. Patchy fog and frost after midnight. Lows in the mid 30s to lower 40s. North winds 5 to 10 mph.

Sunday: Partly cloudy. Highs in the 40s to mid 50s.

Sunday Night: Clear except for frost. Lows in the 30s to lower 40s.

Monday: Sunny. Areas of frost. Highs in the upper 40s to lower 60s.

Monday Night and Tuesday: Mostly clear. Lows in the mid 30s to lower 40s. Highs in the upper 40s to lower 60s.

Tuesday Night: Mostly clear except patchy fog. Lows in the mid 30s to lower 40s.

Wednesday: Partly cloudy in the morning then becoming sunny. Highs in the upper 40s to lower 60s.

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

New Years Day: Mostly cloudy. Patchy fog. A chance of showers. Highs in the 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.

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