| COSUMNES RIVER - MCCONNELL (MCNC1) | ||
| Latitude: 38.36º N | Longitude: 121.34º W | Elevation: 5 Feet |
| Location: Sacramento County in CA | ||
| River Group: San Joaquin | ||
| Forecast Issued: | Feb 16 2026 at 3:15 PM PST | Next Issuance: | Feb 17 2026 at 9:00 AM PST |
| Action/ Monitor: 38.5 Ft | Minor Flood: 44.5 Ft | Moderate Flood: 53.4 Ft | Major Flood: 53.5 Ft |
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| Please Note: |
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Historical Stage/Flow Data |
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Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months. |
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Water Year
|
Peak Discharge (cfs)
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Stage (feet)
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Date
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| Most Recent 5 Years | |||
| 2020* | 6,052 | 37.90 | Mar 19, 2025 |
| 2024* | 13,400 | 42.98 | Mar 2, 2024 |
| 2023* | 73,600*** | 46.64*** | Jan 1, 2023 |
| 2022* | 7,790 | 38.99 | Dec 24, 2021 |
| 2021* | 3,000 | 32.00 | Jan 29, 2021 |
| Historical High Stage/Flow Events (Period of Record - Jan 1952 to Present)**** - Ranked by Flow | |||
| 2023* | 73,600*** | 46.64*** | Jan 1, 2023 |
| 1956* | 54,000 | 46.26 | Dec 23, 1955 |
| 2006* | 36,209 | 47.02 | Jan 01, 2006 |
| 1958 | 32,600 | 46.10 | Apr 03, 1958 |
| 1965* | 32,200 | 45.35 | Dec 23, 1964 |
| 1983* | 31,000 | 45.97 | Mar 14, 1983 |
| * Discharge affected by regulation or diversion ** Dataum changed from USED to NAVD88 on 06/20/2023. The difference is +2.46 ft and must be applied to all data before date to convert to NAVD88. *** Estimated from simulated data. Gauge data not reliable from Jan 1, 2023 through Jan 10, 2023. **** Additional high flow events occurred in 1986, 1997, & 1998 with only stage measured. Ranking by stage is not possible due to the dynamic nature of the channel. |
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| Location Photographs | ||
| ESRI™ Locator Map |
| Flood Impacts | |
| 46.5 Feet | At approximately 44,000 cfs, water exits the river upstream and downstream of Highway 99. Dillard Road is flooded from Highway 99 to Riley Road. Twin Cities Road is flooded from Hardesty Lane to Christensen Road. |
| 44.5 Feet | Flood stage. |
| 41.5 Feet | The Cosumnes River overflow channel begins to flow. |
| 38.5 Feet | Monitor Stage. |