CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

SACRAMENTO RIVER - HAMILTON CITY (HAMC1)

Latitude: 39.75º N	Longitude: 122.00º W	Elevation: 125 Feet
Location: Glenn County in California		Bulletin Group: Upper Sacramento		River Group: Upper Sacramento

Issuance Time:

Jan 05 2026 at 1:00 PM PST

Next Issuance:

Jan 05 2026 at 9:00 PM PST

Action/Monitor: 142.0 Feet

Minor Flood: 147.0 Feet

Moderate Flood: 149.2 Feet

Major Flood: 150.2 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.

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	109,552	147.92	Feb 06, 2025
2024	91,100	145.39	Feb 20, 2024
2023	105,300	146.79	Mar 15, 2023
2022	47,500	137.98	Oct 25, 2021
2021	13,300	130.71	Jan 29, 2021
Historical High Stage/Flow Events (Period of Record - January 1927 to Present) - Ranked by Flow
1986	160,900	150.53	Feb 18, 1986
1970	160,700	150.80	Jan 24, 1970
1983	159,600	150.77	Mar 1, 1983
1997	155,300	150.92	Jan 2, 1997
1995	152,460**	150.65	Jan 10, 1995
1974	147,000	149.50	Jan 17, 1974
* Datum changed from USED to NAVD88 on 10/01/2019. The difference is -0.8 ft and must be applied to all data before date to convert to NAVD88 ** Estimated

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
147.2 Feet	Flood Stage - Overflow begins on the East bank of the river in Butte County, from near Wilson Landing Road to Highway 32.
146.8 Feet	Water at top of Irvine Finch boat ramp.
145.1 Feet	Water inundates Phase 2A restoration area north of Hwy 32 bridge inside of levee; touches toe of levee.
144.0 Feet	County Road 23 in Glenn County closes east of RD 2140 levee as a result of water on roadway.
137.7 Feet	West Sacramento Avenue and River Road north of Big Chico Creek flood 1.5 hours after the Hamilton City gage reaches 137.7-138.0 feet.

Official 7 Day National Weather Service Forecast (CAZ016)

Tonight: Rain in the evening, then a chance of rain after midnight. A slight chance of rain late in the night. Patchy fog after midnight. Lows around 47. East winds up to 10 mph with gusts to around 20 mph.

Tuesday: Mostly cloudy. A slight chance of rain in the morning. Patchy fog through the day. Highs 51 to 57. Light winds.

Tuesday Night: Mostly cloudy. Patchy fog through the night. A slight chance of rain after midnight. Lows 42 to 47. Light winds.

Wednesday: Mostly cloudy with a slight chance of rain. Patchy fog through the day. Highs around 51. Light winds.

Wednesday Night: Mostly cloudy with a chance of rain in the evening, then partly cloudy with a slight chance of rain after midnight. Patchy fog through the night. Lows 36 to 41. South winds up to 10 mph in the evening becoming light.

Thursday: Mostly sunny. Patchy fog. Highs around 49.

Thursday Night: Mostly clear. Lows around 37.

Friday: Mostly sunny. Highs around 51.

Friday Night: Mostly clear. Patchy fog. Lows around 36.

Saturday: Mostly sunny. Areas of frost. Highs around 52.

Saturday Night and Sunday: Mostly clear. Patchy fog. Lows around 38. Highs 50 to 56.

Sunday Night: Mostly cloudy. Patchy fog. Lows around 39.

Monday: Partly cloudy. Patchy fog. Highs 52 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.

NWS RSS Feed

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