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:

Jul 12 2025 at 7:55 AM PDT

Next Issuance:

Jul 13 2025 at 9:00 AM PDT

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. Patchy fog late in the evening. Areas of fog after midnight. Lows in the lower 50s. South winds around 5 mph late in the evening and becoming light.

Sunday: Mostly cloudy in the morning then becoming partly cloudy. Areas of fog in the morning. Highs in the 60s. Southwest winds 5 to 10 mph.

Sunday Night: Mostly cloudy. Patchy fog. Lows in the lower 50s. Southwest winds around 5 mph in the evening and becoming light.

Monday: Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs in the 60s. Light winds and becoming southwest 5 to 10 mph in the afternoon.

Monday Night: Partly cloudy in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the lower 50s. West winds around 5 mph in the evening and becoming light.

Tuesday: Mostly cloudy. Highs in the lower to mid 60s.

Tuesday Night: Mostly cloudy. Patchy fog. Lows in the lower 50s.

Wednesday: Mostly cloudy. Highs in the lower to mid 60s.

Wednesday Night and Thursday: Mostly cloudy. Patchy fog. Lows in the lower 50s. Highs in the lower to mid 60s.

Thursday Night and Friday: Mostly cloudy. Areas of fog. Lows in the lower 50s. Highs in the 60s.

Friday Night: Partly cloudy. Patchy fog. Lows in the lower 50s.

Saturday: Mostly cloudy in the morning then becoming partly cloudy. Highs in the 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.

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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.