CNRFC - Hydrology - River Guidance - Graphical RVF

Start of River Group

Location:

SACRAMENTO RIVER - FREMONT WEIR (FMWC1)

Latitude: 38.77º N	Longitude: 121.67º W	Elevation: 40 Feet
Location: Sutter & Yolo Counties in California		Bulletin Group: Lower Sacramento		River Group: Lower Sacramento

Issuance Time:

Jan 07 2026 at 7:43 AM PST

Next Issuance:

Jan 07 2026 at 3:00 PM PST

Action/Monitor: 32.0 Feet

Minor Flood: 39.5 Feet

Moderate Flood: 43.0 Feet

Major Flood: 44.0 Feet

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.

Fremont Weir Location - Stage/Flow into Yolo Bypass (Estimated)

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above.

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.

Historical Stage/Flow Data
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025*	187,030	36.36	Feb 09, 2025
2024*	113,000	34.44	Feb 23, 2024
2023*	122,700	34.74	Jan 15, 2023
2022*	35,400	26.35	Oct 27, 2021
2021*	16,600	17.75	Jan 31, 2021
Historical High Stage/Flow Events (Period of Record - Jan 1932 to Present) - Ranked by Flow
1997*	390,000***	42.47**	Jan 02, 1997
1986*	355,000***	41.70	Feb 20, 1986
1983*	315,000	39.00	Mar 04, 1983
2006*	273,670	39.99	Jan 03, 2006
1980*	263,900	38.30	Feb 22, 1980
1974*	249,300	38.10	Jan 20, 1974
* Discharge affected by regulation or diversion Peak stage of record (Weir overflow depth of 8.97 feet) * Flow estimated **** Datum changed from NGVD29 to NAVD88 on 10/01/2016. The difference is -1.45 ft and must be applied to all data before date to convert to NAVD88

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
44.0 Feet	Stages above 44.0 feet result in flooding outside the levees. Top of levee.
37.3 Feet	At 5.3 feet of overflow Egbert Tract floods.
33.1 Feet	At one foot of overflow, the river road to Woodland is closed due to flooding.
32.0 Feet	Fremont Weir crest elevation. Overflow begins into the Yolo Bypass flooding agricultural lands.

Official 7 Day National Weather Service Forecast (CAZ017)

Today: Mostly cloudy in the morning then becoming partly cloudy. Patchy fog until late afternoon. Highs around 55. Light winds.

Tonight: Partly cloudy with a slight chance of rain. Lows around 38. Southwest winds up to 10 mph shifting to the west after midnight. Gusts up to 20 mph.

Thursday: Mostly sunny. Highs around 49. Northwest winds up to 15 mph. Gusts up to 25 mph in the afternoon.

Thursday Night: Mostly clear. Lows 31 to 39. North winds 10 to 15 mph with gusts to around 30 mph.

Friday: Areas of frost in the morning. Mostly sunny. Highs around 49. North winds up to 10 mph. Gusts up to 25 mph in the morning.

Friday Night: Mostly clear. Patchy frost. Lows around 35.

Saturday: Mostly cloudy. Areas of frost. Highs around 50.

Saturday Night and Sunday: Mostly cloudy. Patchy fog. Lows around 38. Highs around 51.

Sunday Night through Tuesday: Mostly clear. Patchy fog. Lows around 39. Highs 53 to 58.

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.

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