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:

Jan 07 2026 at 2:19 PM PST

Next Issuance:

Jan 08 2026 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 Tonight: Mostly cloudy late in the evening then becoming mostly clear. Lows in the lower 40s. Northwest winds 10 to 20 mph.

Thursday: Sunny. Highs in the mid 50s. North winds 10 to 20 mph.

Thursday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the upper 30s. North winds 5 to 10 mph.

Friday: Sunny. Highs in the mid 50s. East winds around 5 mph.

Friday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the upper 30s. Northeast winds around 5 mph.

Saturday: Partly cloudy. Highs in the mid 50s.

Saturday Night and Sunday: Mostly cloudy. Lows in the lower 40s. Highs in the upper 50s.

Sunday Night: Partly cloudy in the evening then becoming mostly clear. Lows in the lower 40s.

Monday through Tuesday: Mostly clear. Highs in the lower 60s. Lows in the mid 40s.

Tuesday Night: Partly cloudy. Lows in the mid 40s.

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

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.

NWS RSS Feed

Verification - Historical Graphical RVF
Month:	Day:	Year:	Cycle:
To view other verification locations, use our Historical Graphical River Forecast Interface.