CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

SOUTH FORK GUALALA RIVER - SEA RANCH (GSRC1)

Latitude: 38.71º N	Longitude: 123.43º W	Elevation: 40 Feet
Location: Sonoma County in California		Bulletin Group: Russian Napa		River Group: Russian Napa

Issuance Time:

Dec 27 2025 at 9:16 AM PST

Next Issuance:

Dec 28 2025 at 9:00 AM PST

Action/Monitor: N/A

Minor Flood: N/A

Moderate Flood: N/A

Major Flood: N/A

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

Official 7 Day National Weather Service Forecast (CAZ505)

Rest of Today: Sunny. Highs in the mid 50s. Northwest winds 5 to 10 mph.

Tonight: Mostly clear in the evening then becoming partly cloudy. Lows in the lower 40s. North winds around 5 mph in the evening and becoming light.

Sunday: Sunny. Highs in the mid 50s. East winds around 5 mph and Becoming west in the afternoon.

Sunday Night: Mostly clear. Lows around 40. Light winds and Becoming northeast around 5 mph after midnight.

Monday: Sunny. Highs in the mid 50s. Northeast winds around 5 mph.

Monday Night: Mostly clear. Lows in the lower 40s.

Tuesday and Tuesday Night: Mostly clear. Highs in the upper 50s. Lows in the lower 40s.

Wednesday and Wednesday Night: Mostly cloudy. A chance of rain. Highs in the upper 50s. Lows in the mid 40s.

New Years Day: Rain likely. Highs in the mid 50s.

Thursday Night: Rain likely. Lows in the upper 40s.

Friday: Mostly cloudy. A chance of rain. Highs in the 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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Verification - Historical Graphical RVF
Month:	Day:	Year:	Cycle:
To view other verification locations, use our Historical Graphical River Forecast Interface.