Cosumnes River at Michigan Bar
No watches, warnings or advisories are in effect for this area.
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Upstream gauge unavailableWarning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
Traces and Thresholds Click to turn on/off display
Observed (OBS) 06/22/2025 4:30 PM PDTOfficial Forecast (FCST) 06/22/2025 8:42 AM PDTRecord: 18.5 ftCATEGORY STAGE 
Major Flooding 18 ft Moderate Flooding 16 ft Minor Flooding 12 ft Action 7 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely year-round.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 13.2 - Water floods houses in Wilton. The south bank levee near Wilton is overtopped.
- 12 - Water flows on to the road near Wilton.
- 8 - Low lying lands along the river begin to flood.
Gauge Info
| Coordinates | 38.5002, -121.045 |
| RFC | CNRFC |
| State | CA |
| WFO | STO |
| County | Sacramento |
| Data Provider(s) | |
| US Geological Survey | USGS--Water Resources of the United States |
| USGS | 11335000 |
Gauge Location
Recent Crests
| 1. | 9.14 ft | on 03-02-2024 |
| 2. | 11.14 ft | on 03-15-2023 |
| 3. | 16.83 ft | on 12-31-2022 |
| 4. | 10.11 ft | on 10-25-2021 |
| 5. | 6.56 ft | on 01-28-2021 |
Recent Crests
| 1. | 9.14 ft | on 03-02-2024 |
| 2. | 11.14 ft | on 03-15-2023 |
| 3. | 16.83 ft | on 12-31-2022 |
| 4. | 10.11 ft | on 10-25-2021 |
| 5. | 6.56 ft | on 01-28-2021 |
| 6. | 8.26 ft | on 04-06-2020 |
| 7. | 10.05 ft | on 02-14-2019 |
| 8. | 11.67 ft | on 03-22-2018 |
| 9. | 12.91 ft | on 02-08-2017 |
| 10. | 13.15 ft | on 01-01-2017 |
| 11. | 8.89 ft | on 03-07-2016 |
| 12. | 13.37 ft | on 04-04-2006 |
| 13. | 13.68 ft | on 12-31-2005 |
| 14. | 11.75 ft | on 02-09-1999 |
| 15. | 13.21 ft | on 02-03-1998 |
| 16. | 18.54 ft | on 01-02-1997 |
| 17. | 11.35 ft | on 03-11-1995 |
| 18. | 8.20 ft | on 01-21-1993 |
| 19. | 5.00 ft | on 02-16-1990 |
| 20. | 7.50 ft | on 03-25-1989 |
| 21. | 5.00 ft | on 01-17-1988 |
| 22. | 5.30 ft | on 02-13-1987 |
| 23. | 14.76 ft | on 02-17-1986 |
| 24. | 7.30 ft | on 02-08-1985 |
| 25. | 10.30 ft | on 12-25-1983 |
| 26. | 11.60 ft | on 03-13-1983 |
| 27. | 13.80 ft | on 02-16-1982 |
| 28. | 7.20 ft | on 03-25-1981 |
| 29. | 13.17 ft | on 01-13-1980 |
| 30. | 7.50 ft | on 01-11-1979 |
| 31. | 7.90 ft | on 03-04-1978 |
| 32. | 3.20 ft | on 02-22-1977 |
| 33. | 3.80 ft | on 10-27-1975 |
| 34. | 8.25 ft | on 03-25-1975 |
| 35. | 7.70 ft | on 03-02-1974 |
| 36. | 9.20 ft | on 01-16-1973 |
| 37. | 6.20 ft | on 12-25-1971 |
| 38. | 7.60 ft | on 03-26-1971 |
| 39. | 10.90 ft | on 01-21-1969 |
| 40. | 6.30 ft | on 02-20-1968 |
| 41. | 9.60 ft | on 01-22-1967 |
| 42. | 5.80 ft | on 12-29-1965 |
| 43. | 13.80 ft | on 12-23-1964 |
| 44. | 6.20 ft | on 01-22-1964 |
| 45. | 14.11 ft | on 02-01-1963 |
| 46. | 12.18 ft | on 04-03-1958 |
| 47. | 14.59 ft | on 12-23-1955 |
| 48. | 11.85 ft | on 11-18-1950 |
| 49. | 10.51 ft | on 02-02-1945 |
| 50. | 10.90 ft | on 03-10-1943 |
| 51. | 11.28 ft | on 01-27-1942 |
| 52. | 11.66 ft | on 03-31-1940 |
| 53. | 10.06 ft | on 02-11-1938 |
| 54. | 10.43 ft | on 04-08-1935 |
| 55. | 11.00 ft | on 03-25-1928 |
| 56. | 11.20 ft | on 02-06-1925 |
| 57. | 10.50 ft | on 01-18-1921 |
| 58. | 10.80 ft | on 02-10-1919 |
| 59. | 11.00 ft | on 02-21-1917 |
| 60. | 10.00 ft | on 01-22-1914 |
| 61. | 12.00 ft | on 01-31-1911 |
| 62. | 12.00 ft | on 01-13-1909 |
| 63. | 16.30 ft | on 03-01-1907 |
Historic Crests
| 1. | 18.54 ft | on 01-02-1997 |
| 2. | 16.83 ft | on 12-31-2022 |
| 3. | 16.30 ft | on 03-01-1907 |
| 4. | 14.76 ft | on 02-17-1986 |
| 5. | 14.59 ft | on 12-23-1955 |
Historic Crests
| 1. | 18.54 ft | on 01-02-1997 |
| 2. | 16.83 ft | on 12-31-2022 |
| 3. | 16.30 ft | on 03-01-1907 |
| 4. | 14.76 ft | on 02-17-1986 |
| 5. | 14.59 ft | on 12-23-1955 |
| 6. | 14.11 ft | on 02-01-1963 |
| 7. | 13.80 ft | on 12-23-1964 |
| 8. | 13.80 ft | on 02-16-1982 |
| 9. | 13.68 ft | on 12-31-2005 |
| 10. | 13.37 ft | on 04-04-2006 |
| 11. | 13.21 ft | on 02-03-1998 |
| 12. | 13.17 ft | on 01-13-1980 |
| 13. | 13.15 ft | on 01-01-2017 |
| 14. | 12.91 ft | on 02-08-2017 |
| 15. | 12.18 ft | on 04-03-1958 |
| 16. | 12.00 ft | on 01-13-1909 |
| 17. | 12.00 ft | on 01-31-1911 |
| 18. | 11.85 ft | on 11-18-1950 |
| 19. | 11.75 ft | on 02-09-1999 |
| 20. | 11.67 ft | on 03-22-2018 |
| 21. | 11.66 ft | on 03-31-1940 |
| 22. | 11.60 ft | on 03-13-1983 |
| 23. | 11.35 ft | on 03-11-1995 |
| 24. | 11.28 ft | on 01-27-1942 |
| 25. | 11.20 ft | on 02-06-1925 |
| 26. | 11.14 ft | on 03-15-2023 |
| 27. | 11.00 ft | on 02-21-1917 |
| 28. | 11.00 ft | on 03-25-1928 |
| 29. | 10.90 ft | on 03-10-1943 |
| 30. | 10.90 ft | on 01-21-1969 |
| 31. | 10.80 ft | on 02-10-1919 |
| 32. | 10.51 ft | on 02-02-1945 |
| 33. | 10.50 ft | on 01-18-1921 |
| 34. | 10.43 ft | on 04-08-1935 |
| 35. | 10.30 ft | on 12-25-1983 |
| 36. | 10.11 ft | on 10-25-2021 |
| 37. | 10.06 ft | on 02-11-1938 |
| 38. | 10.05 ft | on 02-14-2019 |
| 39. | 10.00 ft | on 01-22-1914 |
| 40. | 9.60 ft | on 01-22-1967 |
| 41. | 9.20 ft | on 01-16-1973 |
| 42. | 9.14 ft | on 03-02-2024 |
| 43. | 8.89 ft | on 03-07-2016 |
| 44. | 8.26 ft | on 04-06-2020 |
| 45. | 8.25 ft | on 03-25-1975 |
| 46. | 8.20 ft | on 01-21-1993 |
| 47. | 7.90 ft | on 03-04-1978 |
| 48. | 7.70 ft | on 03-02-1974 |
| 49. | 7.60 ft | on 03-26-1971 |
| 50. | 7.50 ft | on 01-11-1979 |
| 51. | 7.50 ft | on 03-25-1989 |
| 52. | 7.30 ft | on 02-08-1985 |
| 53. | 7.20 ft | on 03-25-1981 |
| 54. | 6.56 ft | on 01-28-2021 |
| 55. | 6.30 ft | on 02-20-1968 |
| 56. | 6.20 ft | on 12-25-1971 |
| 57. | 6.20 ft | on 01-22-1964 |
| 58. | 5.80 ft | on 12-29-1965 |
| 59. | 5.30 ft | on 02-13-1987 |
| 60. | 5.00 ft | on 02-16-1990 |
| 61. | 5.00 ft | on 01-17-1988 |
| 62. | 3.80 ft | on 10-27-1975 |
| 63. | 3.20 ft | on 02-22-1977 |
Vertical Datum Table
| type | NGVD29 |
|---|---|
| major Flooding | 186.09 ft |
| moderate Flooding | 184.09 ft |
| minor Flooding | 180.09 ft |
| action | 175.09 ft |
| Latest Value | 171.13 ft |
| Gauge Zero | 168.09 ft |
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
Resources
Hydrologic Resource Links
WFO Information
Weather Forecast Office
Sacramento
3310 El Camino Ave Ste 228
Sacramento, CA 95821
Official Homepage