Sacramento River at Hamilton City
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
- Warning: 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) 06/20/2025 8:45 PM PDTOfficial Forecast (FCST) 06/20/2025 10:19 AM PDTRecord: 150.9 ftLow Threshold: 0 ftCATEGORY STAGE 
Major Flooding 150.2 ft Moderate Flooding 149.2 ft Minor Flooding 147 ft Action 142 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely year-round.
Crests prior to 10/1/2019 are in an old datum. Datum change to NAVD88 occurred on 10/1/2019. See LINK for correction value.
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
- 147.2 - Overflow begins on the east bank of the river, from near Wilson Landing Road to Highway 32.
- 146.8 - Water at top of Irvine Finch boat ramp.
- 145.1 - Water inundates Phase 2A restoration area north of Hwy 32 bridge inside of levee; touches toe of levee.
Gauge Info
| Coordinates | 39.7508, -121.998 |
| RFC | CNRFC |
| State | CA |
| WFO | STO |
| County | Glenn |
| Data Provider(s) | |
| State of California / Department of Water Resources | DWR CDEC ID: HMC |
Gauge Location
Recent Crests
| 1. | 148.23 ft | on 02-05-2025 |
| 2. | 145.39 ft | on 02-20-2024 |
| 3. | 146.79 ft | on 03-15-2023 |
| 4. | 148.68 ft | on 01-15-2023 |
| 5. | 137.98 ft | on 10-25-2021 |
Recent Crests
| 1. | 148.23 ft | on 02-05-2025 | |
| 2. | 145.39 ft | on 02-20-2024 | |
| 3. | 146.79 ft | on 03-15-2023 | |
| 4. | 148.68 ft | on 01-15-2023 | |
| 5. | 137.98 ft | on 10-25-2021 | |
| 6. | 130.71 ft | on 01-29-2021 | |
| 7. | 134.20 ft | on 01-24-2020 | |
| 8. | 147.87 ft | on 02-27-2019 | 1 |
| 9. | 140.70 ft | on 04-08-2018 | 1 |
| 10. | 149.32 ft | on 02-19-2017 | 1 |
| 11. | 147.27 ft | on 01-09-2017 | 1 |
| 12. | 145.40 ft | on 12-16-2016 | 1 |
| 13. | 142.43 ft | on 01-18-2016 | 1 |
| 14. | 148.32 ft | on 12-12-2014 | 1 |
| 15. | 135.42 ft | on 03-04-2014 | 1 |
| 16. | 143.14 ft | on 12-02-2012 | 1 |
| 17. | 135.69 ft | on 01-23-2012 | 1 |
| 18. | 145.66 ft | on 03-21-2011 | 1 |
| 19. | 142.85 ft | on 01-21-2010 | 1 |
| 20. | 139.78 ft | on 02-18-2009 | 1 |
| 21. | 141.38 ft | on 01-26-2008 | 1 |
| 22. | 139.62 ft | on 02-11-2007 | 1 |
| 23. | 147.08 ft | on 03-06-2006 | 1 |
| 24. | 149.70 ft | on 01-01-2006 | 1 |
| 25. | 150.92 ft | on 01-02-1997 | 1 |
| 26. | 149.16 ft | on 03-10-1995 | 1 |
| 27. | 150.65 ft | on 01-10-1995 | 1 |
| 28. | 134.86 ft | on 02-07-1994 | 1 |
| 29. | 145.19 ft | on 03-25-1993 | 1 |
| 30. | 146.57 ft | on 01-21-1993 | 1 |
| 31. | 140.20 ft | on 01-04-1988 | 1 |
| 32. | 150.53 ft | on 02-18-1986 | 1 |
| 33. | 150.77 ft | on 03-01-1983 | 1 |
| 34. | 149.50 ft | on 01-17-1974 | 1 |
| 35. | 150.80 ft | on 01-24-1970 | 1 |
| 36. | 144.70 ft | on 01-31-1967 | 1 |
| 37. | 147.50 ft | on 01-06-1965 | 1 |
| 38. | 143.30 ft | on 02-09-1960 | 1 |
| 39. | 149.20 ft | on 02-25-1958 | 1 |
| 40. | 146.90 ft | on 01-16-1956 | 1 |
| 41. | 146.30 ft | on 12-23-1955 | 1 |
Historic Crests
| 1. | 150.92 ft | on 01-02-1997 | 1 |
| 2. | 150.80 ft | on 01-24-1970 | 1 |
| 3. | 150.77 ft | on 03-01-1983 | 1 |
| 4. | 150.65 ft | on 01-10-1995 | 1 |
| 5. | 150.53 ft | on 02-18-1986 | 1 |
Historic Crests
| 1. | 150.92 ft | on 01-02-1997 | 1 |
| 2. | 150.80 ft | on 01-24-1970 | 1 |
| 3. | 150.77 ft | on 03-01-1983 | 1 |
| 4. | 150.65 ft | on 01-10-1995 | 1 |
| 5. | 150.53 ft | on 02-18-1986 | 1 |
| 6. | 149.70 ft | on 01-01-2006 | 1 |
| 7. | 149.50 ft | on 01-17-1974 | 1 |
| 8. | 149.32 ft | on 02-19-2017 | 1 |
| 9. | 149.20 ft | on 02-25-1958 | 1 |
| 10. | 149.16 ft | on 03-10-1995 | 1 |
| 11. | 148.68 ft | on 01-15-2023 | |
| 12. | 148.32 ft | on 12-12-2014 | 1 |
| 13. | 148.23 ft | on 02-05-2025 | |
| 14. | 147.87 ft | on 02-27-2019 | 1 |
| 15. | 147.50 ft | on 01-06-1965 | 1 |
| 16. | 147.27 ft | on 01-09-2017 | 1 |
| 17. | 147.08 ft | on 03-06-2006 | 1 |
| 18. | 146.90 ft | on 01-16-1956 | 1 |
| 19. | 146.79 ft | on 03-15-2023 | |
| 20. | 146.57 ft | on 01-21-1993 | 1 |
| 21. | 146.30 ft | on 12-23-1955 | 1 |
| 22. | 145.66 ft | on 03-21-2011 | 1 |
| 23. | 145.40 ft | on 12-16-2016 | 1 |
| 24. | 145.39 ft | on 02-20-2024 | |
| 25. | 145.19 ft | on 03-25-1993 | 1 |
| 26. | 144.70 ft | on 01-31-1967 | 1 |
| 27. | 143.30 ft | on 02-09-1960 | 1 |
| 28. | 143.14 ft | on 12-02-2012 | 1 |
| 29. | 142.85 ft | on 01-21-2010 | 1 |
| 30. | 142.43 ft | on 01-18-2016 | 1 |
| 31. | 141.38 ft | on 01-26-2008 | 1 |
| 32. | 140.70 ft | on 04-08-2018 | 1 |
| 33. | 140.20 ft | on 01-04-1988 | 1 |
| 34. | 139.78 ft | on 02-18-2009 | 1 |
| 35. | 139.62 ft | on 02-11-2007 | 1 |
| 36. | 137.98 ft | on 10-25-2021 | |
| 37. | 135.69 ft | on 01-23-2012 | 1 |
| 38. | 135.42 ft | on 03-04-2014 | 1 |
| 39. | 134.86 ft | on 02-07-1994 | 1 |
| 40. | 134.20 ft | on 01-24-2020 | |
| 41. | 130.71 ft | on 01-29-2021 |
Vertical Datum Table
| type | NAVD88 |
|---|---|
| major Flooding | 150.20 ft |
| moderate Flooding | 149.20 ft |
| minor Flooding | 147.00 ft |
| action | 142.00 ft |
| Latest Value | 129.84 ft |
| Gauge Zero | 0.00 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.