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| Latitude: 39.24º N | Longitude: 121.99º W | Elevation: 62 Feet | |||
| Location: Colusa County in California | Bulletin Group: Upper Sacramento | River Group: Upper Sacramento | |||
| Action/Monitor: 60.9 Feet | Minor Flood: 70.1 Feet | Moderate Flood: 72.9 Feet | Major Flood: 73.9 Feet |
| Observed Data Credit | |
 | Raw streamflow data is provided by the California Department of Water Resources. |
Historical Mean Dailiy Stage/Flow Data |
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|
Water Year
|
Peak Discharge (cfs)
|
Stage (feet)
|
Date
|
| Most Recent 5 Years | |||
| 2025 | 44,261 | 67.99 | Feb 07, 2025 |
| 2024 | 34,400 | 67.27 | Feb 21, 2024 |
| 2023 | 26,500 | 66.60 | Mar 16, 2023 |
| 2022 | 0**** | -- | -- |
| 2021 | 0**** | -- | -- |
| Historical High Stage/Flow Events (Period of Record - January 1911 to Present) - Ranked by Stage | |||
| 1940 | -- | 70.60* | Mar 1, 1940 |
| 1983 | 81,500 | 68.96** | Mar 4, 1983 |
| 1997 | 71,000 | 68.85 | Jan 3, 1997 |
| 1958 | 83,600 | 68.80*** | Feb 21, 1958 |
| 1965 | 77,400 | 68.50 | Jan 7, 1965 |
| 1943 | -- | 68.30 | Jan 24, 1943 |
| * Peak prior to regulation by Shasta Dam ** Peak after regulation by Shasta Dam *** Peak also occurred on Feb 26th **** No weir flow observed during the entire water year ***** Datum changed from USED to NAVD88 on 10/01/2019. The difference is -0.9 ft and must be applied to all data before date to convert to NAVD88 |
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| Location Photographs | ||
| ESRI™ Locator Map |
| Flood Impacts | |
| 73.9 Feet | Stages above 73.9 feet result in major flooding. Top of levee. |
| 60.9 Feet | Colusa Weir crest elevation. Overflow begins into the Sutter Bypass. |
| 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. |
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