CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

MIDDLE FORK COSUMNES RIVER - SOMERSET (SOSC1)

Latitude: 38.62º N	Longitude: 120.70º W	Elevation: 1821 Feet
Location: El Dorado County in California		Bulletin Group: San Joaquin		River Group: North San Joaquin

Issuance Time:

Dec 27 2025 at 9:54 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 California Department of Water Resources. View California Department of Water Resources Data for this station location.

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ067)

Today: Mostly cloudy in the morning then clearing. Patchy fog in the morning. Highs 46 to 54. Light winds.

Tonight: Clear. Patchy dense fog after midnight. Lows 33 to 39. Prevailing northeast winds up to 10 mph.

Monday: Widespread fog and locally dense in the morning. Sunny. Highs 48 to 60. Prevailing east winds up to 10 mph in the morning becoming light.

Monday Night: Clear. Lows 34 to 42. Light winds.

Tuesday: Sunny. Highs 51 to 61. Light winds.

Tuesday Night: Mostly clear. Lows 36 to 44.

Wednesday: Mostly cloudy. Highs 53 to 63.

Wednesday Night and New Years Day: Mostly cloudy with a chance of rain. Lows 40 to 46. Highs 51 to 59.

Thursday Night and Friday: Rain likely. Lows 41 to 47. Highs 49 to 55.

Friday Night and Saturday: Mostly cloudy with a chance of rain. Lows 40 to 46. Highs 49 to 55.

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 Sacramento 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.