Cosumnes River at McConnell
Critical Stages
38.5' - Action
44.5' - Flood
53.4' - Moderate
53.5' - Major
Latest Observation
Updated: 9:15 AM PST 12/17/25
Status: No Flooding
Stage: 26.02 ft
Flow: 0.0117 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 11 AM 12/17 | 26.01 | 0.0108 |
| 12 PM 12/17 | 26.02 | 0.0117 |
| 1 PM 12/17 | 26.02 | 0.0117 |
| 2 PM 12/17 | 26.02 | 0.0117 |
| 3 PM 12/17 | 26.03 | 0.0127 |
| 4 PM 12/17 | 26.03 | 0.0127 |
| 5 PM 12/17 | 26.03 | 0.0127 |
| 6 PM 12/17 | 26.04 | 0.0137 |
| 7 PM 12/17 | 26.04 | 0.0137 |
| 8 PM 12/17 | 26.05 | 0.0148 |
| 9 PM 12/17 | 26.05 | 0.0148 |
| 10 PM 12/17 | 26.06 | 0.0161 |
| 11 PM 12/17 | 26.07 | 0.0174 |
| 12 AM 12/18 | 26.08 | 0.0188 |
| 1 AM 12/18 | 26.09 | 0.0203 |
| 2 AM 12/18 | 26.11 | 0.0231 |
| 3 AM 12/18 | 26.14 | 0.0268 |
| 4 AM 12/18 | 26.17 | 0.0311 |
| 5 AM 12/18 | 26.21 | 0.0373 |
| 6 AM 12/18 | 26.25 | 0.0429 |
| 7 AM 12/18 | 26.29 | 0.0493 |
| 8 AM 12/18 | 26.34 | 0.0572 |
| 9 AM 12/18 | 26.38 | 0.0642 |
| 10 AM 12/18 | 26.43 | 0.0727 |
| 11 AM 12/18 | 26.47 | 0.0795 |
| 12 PM 12/18 | 26.5 | 0.085 |
| 1 PM 12/18 | 26.54 | 0.0918 |
| 2 PM 12/18 | 26.57 | 0.0972 |
| 3 PM 12/18 | 26.6 | 0.103 |
| 4 PM 12/18 | 26.62 | 0.106 |
| 5 PM 12/18 | 26.64 | 0.11 |
| 6 PM 12/18 | 26.66 | 0.113 |
| 7 PM 12/18 | 26.67 | 0.115 |
| 8 PM 12/18 | 26.68 | 0.117 |
| 9 PM 12/18 | 26.68 | 0.117 |
| 10 PM 12/18 | 26.68 | 0.117 |
| 11 PM 12/18 | 26.68 | 0.117 |
| 12 AM 12/19 | 26.68 | 0.117 |
| 1 AM 12/19 | 26.67 | 0.115 |
| 2 AM 12/19 | 26.66 | 0.113 |
| 3 AM 12/19 | 26.65 | 0.112 |
| 4 AM 12/19 | 26.64 | 0.11 |
| 5 AM 12/19 | 26.62 | 0.106 |
| 6 AM 12/19 | 26.61 | 0.105 |
| 7 AM 12/19 | 26.6 | 0.103 |
| 8 AM 12/19 | 26.58 | 0.0991 |
| 9 AM 12/19 | 26.57 | 0.0972 |
| 10 AM 12/19 | 26.55 | 0.0936 |
| 11 AM 12/19 | 26.54 | 0.0918 |
| 12 PM 12/19 | 26.52 | 0.0883 |
| 1 PM 12/19 | 26.51 | 0.0867 |
| 2 PM 12/19 | 26.49 | 0.0831 |
| 3 PM 12/19 | 26.48 | 0.0813 |
| 4 PM 12/19 | 26.47 | 0.0795 |
| 5 PM 12/19 | 26.45 | 0.076 |
| 6 PM 12/19 | 26.44 | 0.0744 |
| 7 PM 12/19 | 26.43 | 0.0727 |
| 8 PM 12/19 | 26.42 | 0.0711 |
| 9 PM 12/19 | 26.41 | 0.0695 |
| 10 PM 12/19 | 26.4 | 0.068 |
| 11 PM 12/19 | 26.39 | 0.0661 |
| 12 AM 12/20 | 26.39 | 0.0661 |
| 1 AM 12/20 | 26.38 | 0.0642 |
| 2 AM 12/20 | 26.37 | 0.0624 |
| 3 AM 12/20 | 26.37 | 0.0624 |
| 4 AM 12/20 | 26.37 | 0.0624 |
| 5 AM 12/20 | 26.37 | 0.0624 |
| 6 AM 12/20 | 26.37 | 0.0624 |
| 7 AM 12/20 | 26.37 | 0.0624 |
| 8 AM 12/20 | 26.37 | 0.0624 |
| 9 AM 12/20 | 26.38 | 0.0642 |
| 10 AM 12/20 | 26.39 | 0.0661 |
| 11 AM 12/20 | 26.4 | 0.068 |
| 12 PM 12/20 | 26.42 | 0.0711 |
| 1 PM 12/20 | 26.45 | 0.076 |
| 2 PM 12/20 | 26.48 | 0.0813 |
| 3 PM 12/20 | 26.51 | 0.0867 |
| 4 PM 12/20 | 26.55 | 0.0936 |
| 5 PM 12/20 | 26.6 | 0.103 |
| 6 PM 12/20 | 26.65 | 0.112 |
| 7 PM 12/20 | 26.7 | 0.121 |
| 8 PM 12/20 | 26.75 | 0.131 |
| 9 PM 12/20 | 26.8 | 0.141 |
| 10 PM 12/20 | 26.86 | 0.153 |
| 11 PM 12/20 | 26.91 | 0.163 |
| 12 AM 12/21 | 26.96 | 0.173 |
| 1 AM 12/21 | 27.02 | 0.185 |
| 2 AM 12/21 | 27.07 | 0.195 |
| 3 AM 12/21 | 27.12 | 0.206 |
| 4 AM 12/21 | 27.17 | 0.217 |
| 5 AM 12/21 | 27.22 | 0.228 |
| 6 AM 12/21 | 27.28 | 0.241 |
| 7 AM 12/21 | 27.36 | 0.259 |
| 8 AM 12/21 | 27.46 | 0.282 |
| 9 AM 12/21 | 27.57 | 0.307 |
| 10 AM 12/21 | 27.69 | 0.336 |
| 11 AM 12/21 | 27.83 | 0.369 |
| 12 PM 12/21 | 28 | 0.411 |
| 1 PM 12/21 | 28.21 | 0.464 |
| 2 PM 12/21 | 28.47 | 0.531 |
| 3 PM 12/21 | 28.77 | 0.612 |
| 4 PM 12/21 | 29.11 | 0.706 |
| 5 PM 12/21 | 29.5 | 0.817 |
| 6 PM 12/21 | 29.96 | 0.952 |
| 7 PM 12/21 | 30.48 | 1.11 |
| 8 PM 12/21 | 31.02 | 1.28 |
| 9 PM 12/21 | 31.57 | 1.46 |
| 10 PM 12/21 | 32.12 | 1.64 |
| 11 PM 12/21 | 32.68 | 1.83 |
| 12 AM 12/22 | 33.24 | 2.03 |
| 1 AM 12/22 | 33.65 | 2.23 |
| 2 AM 12/22 | 33.9 | 2.43 |
| 3 AM 12/22 | 34.12 | 2.64 |
| 4 AM 12/22 | 34.34 | 2.84 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 10:15 AM 12/17 | 26.02 | 0.0117 |
| 10:00 AM 12/17 | 26.02 | 0.0117 |
| 9:45 AM 12/17 | 26.02 | 0.0117 |
| 9:30 AM 12/17 | 26.02 | 0.0117 |
| 9:15 AM 12/17 | 26.02 | 0.0117 |
| 9:00 AM 12/17 | 26.01 | 0.0108 |
| 8:45 AM 12/17 | 26.02 | 0.0117 |
| 8:30 AM 12/17 | 26.01 | 0.0108 |
| 8:15 AM 12/17 | 26.02 | 0.0117 |
| 8:00 AM 12/17 | 26.01 | 0.0108 |
| 7:45 AM 12/17 | 26.01 | 0.0108 |
| 7:30 AM 12/17 | 26.01 | 0.0108 |
| 7:15 AM 12/17 | 26.01 | 0.0108 |
| 7:00 AM 12/17 | 26.01 | 0.0108 |
| 6:45 AM 12/17 | 26.01 | 0.0108 |
| 6:30 AM 12/17 | 26.01 | 0.0108 |
| 6:15 AM 12/17 | 26.01 | 0.0108 |
| 6:00 AM 12/17 | 26.01 | 0.0108 |
| 5:45 AM 12/17 | 26 | 0.01 |
| 5:30 AM 12/17 | 26 | 0.01 |
| 5:15 AM 12/17 | 26 | 0.01 |
| 5:00 AM 12/17 | 26 | 0.01 |
| 4:45 AM 12/17 | 26 | 0.01 |
| 4:30 AM 12/17 | 26 | 0.01 |
| 4:15 AM 12/17 | 26 | 0.01 |
| 4:00 AM 12/17 | 26 | 0.01 |
| 3:45 AM 12/17 | 26 | 0.01 |
| 3:30 AM 12/17 | 26 | 0.01 |
| 3:15 AM 12/17 | 26 | 0.01 |
| 3:00 AM 12/17 | 26 | 0.01 |
46.5' -
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' -
Flood stage.
41.5' -
The Cosumnes River overflow channel begins to flow.
38.5' -
Monitor Stage.
| Date | Stage (ft) |
|---|---|
| Jan 14, 1980 | 49.9 |
| Jan 2, 1997 | 48.5 |
| Feb 18, 1986 | 47.1 |
| Jan 1, 2006 | 47.02 |
| Feb 4, 1998 | 46.56 |
| Dec 23, 1955 | 46.26 |
| Apr 5, 2006 | 46.12 |
| Dec 23, 1964 | 46.1 |
| Mar 14, 1983 | 45.97 |
| Feb 23, 1936 | 45.9 |
| Feb 1, 1963 | 45.52 |
| Jan 22, 1967 | 45.1 |
| Nov 21, 1950 | 44.9 |
| Dec 26, 1983 | 44.64 |
| Jan 22, 1969 | 44.6 |
| Jan 1, 2017 | 43.97 |
| Feb 10, 2017 | 43.84 |
| Jan 17, 1973 | 43.7 |
| Mar 2, 2024 | 42.98 |
| Mar 23, 2018 | 42.92 |
Data provided by the National Weather Service.
