San Joaquin River at Mossdale Bridge
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
- Downstream 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) 06/26/2025 2:30 AM PDTOfficial Forecast (FCST) 06/25/2025 7:16 AM PDTRecord: 24.4 ftLow Threshold: 0 ftCATEGORY STAGE 
Major Flooding 33.1 ft Moderate Flooding 32.1 ft Minor Flooding 28.5 ft Action 19.5 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely year-round.
Crests prior to 10/1/2006 are in an old datum. Datum change to NAVD88 occurred 10/1/2006. 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
- 33.1 - Stages above 33.1 feet result in flooding outside of the levees. Top of levee.
- 16.39 - Historically Mossdale Trailer Park evacuates.
- 15.4 - Mossdale Trailer Park is threatened by the high water. Mossdale Trailer Park is on the south side of the river inside the levee both upstream and downstream of the gage.
Gauge Info
| Coordinates | 37.7861, -121.306 |
| RFC | CNRFC |
| State | CA |
| WFO | STO |
| County | San Joaquin |
| Data Provider(s) | |
| State of California / Department of Water Resources | DWR CDEC ID: MSD |
Gauge Location
Recent Crests
| 1. | 11.32 ft | on 03-06-2024 |
| 2. | 20.52 ft | on 03-23-2023 |
| 3. | 7.51 ft | on 10-24-2021 |
| 4. | 6.74 ft | on 06-27-2021 |
| 5. | 7.93 ft | on 12-13-2019 |
Recent Crests
| 1. | 11.32 ft | on 03-06-2024 | |
| 2. | 20.52 ft | on 03-23-2023 | |
| 3. | 7.51 ft | on 10-24-2021 | |
| 4. | 6.74 ft | on 06-27-2021 | |
| 5. | 7.93 ft | on 12-13-2019 | |
| 6. | 14.31 ft | on 06-06-2019 | |
| 7. | 10.43 ft | on 04-08-2018 | |
| 8. | 21.70 ft | on 02-23-2017 | |
| 9. | 7.29 ft | on 03-16-2016 | |
| 10. | 6.99 ft | on 12-21-2014 | |
| 11. | 6.79 ft | on 04-19-2014 | |
| 12. | 7.46 ft | on 12-26-2012 | |
| 13. | 7.89 ft | on 05-15-2012 | |
| 14. | 17.87 ft | on 04-03-2011 | |
| 15. | 7.41 ft | on 01-22-2010 | |
| 16. | 6.80 ft | on 03-06-2009 | |
| 17. | 7.19 ft | on 02-03-2008 | |
| 18. | 6.78 ft | on 02-11-2007 | |
| 19. | 17.19 ft | on 04-13-2006 | |
| 20. | 11.98 ft | on 05-31-2005 | |
| 21. | 4.45 ft | on 02-26-2004 | |
| 22. | 5.27 ft | on 12-16-2003 | |
| 23. | 4.55 ft | on 01-02-2002 | |
| 24. | 18.15 ft | on 03-07-2001 | |
| 25. | 10.45 ft | on 02-15-1999 | |
| 26. | 17.13 ft | on 02-14-1998 | |
| 27. | 23.24 ft | on 01-09-1997 | 1 |
| 28. | 3.66 ft | on 08-01-1994 | 1 |
| 29. | 5.05 ft | on 10-18-1984 | 1 |
| 30. | 15.93 ft | on 01-05-1984 | 1 |
| 31. | 15.42 ft | on 04-19-1982 | 1 |
| 32. | 5.12 ft | on 01-31-1981 | 1 |
| 33. | 16.95 ft | on 02-27-1980 | 1 |
| 34. | 10.25 ft | on 03-03-1979 | 1 |
| 35. | 14.45 ft | on 05-04-1978 | 1 |
| 36. | 3.66 ft | on 08-24-1977 | 1 |
| 37. | 4.99 ft | on 10-21-1975 | 1 |
| 38. | 6.71 ft | on 02-16-1975 | 1 |
| 39. | 15.06 ft | on 01-24-1970 | 1 |
| 40. | 18.10 ft | on 01-24-1967 | 1 |
| 41. | 14.11 ft | on 01-12-1965 | 1 |
| 42. | 24.40 ft | on 12-10-1950 | 1 |
Historic Crests
| 1. | 24.40 ft | on 12-10-1950 | 1 |
| 2. | 23.24 ft | on 01-09-1997 | 1 |
| 3. | 21.70 ft | on 02-23-2017 | |
| 4. | 20.52 ft | on 03-23-2023 | |
| 5. | 18.15 ft | on 03-07-2001 |
Historic Crests
| 1. | 24.40 ft | on 12-10-1950 | 1 |
| 2. | 23.24 ft | on 01-09-1997 | 1 |
| 3. | 21.70 ft | on 02-23-2017 | |
| 4. | 20.52 ft | on 03-23-2023 | |
| 5. | 18.15 ft | on 03-07-2001 | |
| 6. | 18.10 ft | on 01-24-1967 | 1 |
| 7. | 17.87 ft | on 04-03-2011 | |
| 8. | 17.19 ft | on 04-13-2006 | |
| 9. | 17.13 ft | on 02-14-1998 | |
| 10. | 16.95 ft | on 02-27-1980 | 1 |
| 11. | 15.93 ft | on 01-05-1984 | 1 |
| 12. | 15.42 ft | on 04-19-1982 | 1 |
| 13. | 15.06 ft | on 01-24-1970 | 1 |
| 14. | 14.45 ft | on 05-04-1978 | 1 |
| 15. | 14.31 ft | on 06-06-2019 | |
| 16. | 14.11 ft | on 01-12-1965 | 1 |
| 17. | 11.98 ft | on 05-31-2005 | |
| 18. | 11.32 ft | on 03-06-2024 | |
| 19. | 10.45 ft | on 02-15-1999 | |
| 20. | 10.43 ft | on 04-08-2018 | |
| 21. | 10.25 ft | on 03-03-1979 | 1 |
| 22. | 7.93 ft | on 12-13-2019 | |
| 23. | 7.89 ft | on 05-15-2012 | |
| 24. | 7.51 ft | on 10-24-2021 | |
| 25. | 7.46 ft | on 12-26-2012 | |
| 26. | 7.41 ft | on 01-22-2010 | |
| 27. | 7.29 ft | on 03-16-2016 | |
| 28. | 7.19 ft | on 02-03-2008 | |
| 29. | 6.99 ft | on 12-21-2014 | |
| 30. | 6.80 ft | on 03-06-2009 | |
| 31. | 6.79 ft | on 04-19-2014 | |
| 32. | 6.78 ft | on 02-11-2007 | |
| 33. | 6.74 ft | on 06-27-2021 | |
| 34. | 6.71 ft | on 02-16-1975 | 1 |
| 35. | 5.27 ft | on 12-16-2003 | |
| 36. | 5.12 ft | on 01-31-1981 | 1 |
| 37. | 5.05 ft | on 10-18-1984 | 1 |
| 38. | 4.99 ft | on 10-21-1975 | 1 |
| 39. | 4.55 ft | on 01-02-2002 | |
| 40. | 4.45 ft | on 02-26-2004 | |
| 41. | 3.66 ft | on 08-24-1977 | 1 |
| 42. | 3.66 ft | on 08-01-1994 | 1 |
Vertical Datum Table
| type | NAVD88 |
|---|---|
| major Flooding | 33.10 ft |
| moderate Flooding | 32.10 ft |
| minor Flooding | 28.50 ft |
| action | 19.50 ft |
| Latest Value | 5.01 ft |
| Gauge Zero | 0.00 ft |
Probability Information
No Images Available
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.