National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service
*** IMPORTANT ***  Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.
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SACRAMENTO RIVER - FREMONT WEIR (FMWC1)
Latitude: 38.77º NLongitude: 121.67º WElevation: 40 Feet
Location: Sutter & Yolo Counties in CaliforniaBulletin Group: Lower SacramentoRiver Group: Lower Sacramento
Issuance Time: Jun 06 2025 at 7:25 AM PDTNext Issuance: Jun 07 2025 at 9:00 AM PDT
Action/Monitor: 32.0 FeetMinor Flood: 39.5 FeetModerate Flood: 43.0 FeetMajor Flood: 44.0 Feet

Sacramento River - Fremont Weir (FMWC1)River Forecast Plot

Combination chart with 4 data series.
Forecast Posted: 06/06/2025 at 7:18 AM PDT ● Graphic Created: 06/06/2025 at 7:25 AM PDT
The chart has 1 X axis displaying Time. Range: 2025-06-01 14:00:00 to 2025-06-11 14:00:00.
The chart has 2 Y axes displaying Precipitation (In.) and Precipitation (In.).
End of interactive chart.

Chart

Combination chart with 7 data series.
The chart has 1 X axis displaying Observation / Forecast Time (Pacific Local Time). Range: 2025-06-01 07:00:00 to 2025-06-11 07:00:00.
The chart has 2 Y axes displaying Stage (Feet) and Flow (Cubic Feet per Second).
End of interactive chart.
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)

Chart

Combination chart with 5 data series.
The chart has 1 X axis displaying Observation / Forecast Time (Pacific Local Time). Range: 2025-06-01 14:00:00 to 2025-06-11 14:00:00.
The chart has 2 Y axes displaying Stage (Feet) and Flow (Cubic Feet per Second).
End of interactive chart.
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
Gage owner logo

Raw streamflow data is provided by the California Department of Water Resources.
View California Department of Water Resources Data for this station location.

Verification - Historical Graphical RVF
Month:  
Day:  
Year:  
Cycle:  
To view other verification locations, use our Historical Graphical River Forecast Interface.
Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2020*
24,300
21.95
Jan 28, 2020
 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
2006*
273,670
39.99
Jan 03, 2006
 * 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
ESRI™ Locator Map
Flood Impacts
44.0 FeetStages above 44.0 feet result in flooding outside the levees. Top of levee.
37.3 FeetAt 5.3 feet of overflow Egbert Tract floods.
33.1 FeetAt one foot of overflow, the river road to Woodland is closed due to flooding.
32.0 FeetFremont Weir crest elevation. Overflow begins into the Yolo Bypass flooding agricultural lands.
Official 7 Day National Weather Service Forecast   (CAZ017)
Today: Sunny. Highs 88 to 96. South winds up to 10 mph with gusts to around 20 mph.

Tonight: Clear. Lows 55 to 64. South winds up to 10 mph with gusts to around 20 mph.

Saturday: Sunny. Highs 89 to 99. Southwest winds up to 10 mph. Gusts up to 25 mph in the afternoon.

Saturday Night: Mostly clear. Lows 54 to 64. Southwest winds 10 to 15 mph with gusts to around 25 mph.

Sunday: Mostly sunny. Highs 87 to 97. South winds up to 10 mph with gusts to around 20 mph.

Sunday Night: Mostly clear. Lows 55 to 65.

Monday: Sunny. Highs 90 to 98.

Monday Night through Thursday: Clear. Lows 53 to 63. Highs 87 to 97.
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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US Dept of Commerce
National Oceanic and Atmospheric Administration
National Weather Service
California Nevada River Forecast Center
3310 El Camino Avenue, Room 227
Sacramento, CA 95821-6373
(916) 979-3056

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