Sangamon River at Petersburg
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) 07/16/2025 4:15 AM CDTRecord: 33.9 ftCATEGORY STAGE 
Major Flooding 33 ft Moderate Flooding 24 ft Minor Flooding 23 ft Action 18 ft Reliability of the Forecast:
NOTE: Forecasts are issued as needed during times of high water, but are not routinely available.
River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
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
- 29 - Route 123 is closed. Water overtops Illinois Midland railroad tracks at 4th Street.
- 25 - Some residences on the east side of Petersburg flood.
- 23 - Extensive agricultural and lowland flooding occurs.
Gauge Info
| Coordinates | 40.0133, -89.8383 |
| RFC | NCRFC |
| State | IL |
| WFO | ILX |
| County | Menard |
| Data Provider(s) | |
| U.S. Geological Survey | USGS--Water Resources of the United States |
| USGS | Station #05578000 |
Gauge Location
Recent Crests
| 1. | 18.73 ft | on 01-26-2024 |
| 2. | 17.64 ft | on 02-25-2022 |
| 3. | 19.30 ft | on 07-04-2021 |
| 4. | 18.97 ft | on 05-22-2021 |
| 5. | 23.80 ft | on 05-20-2020 |
Recent Crests
| 1. | 18.73 ft | on 01-26-2024 |
| 2. | 17.64 ft | on 02-25-2022 |
| 3. | 19.30 ft | on 07-04-2021 |
| 4. | 18.97 ft | on 05-22-2021 |
| 5. | 23.80 ft | on 05-20-2020 |
| 6. | 22.59 ft | on 05-03-2020 |
| 7. | 17.80 ft | on 03-23-2020 |
| 8. | 22.56 ft | on 01-16-2020 |
| 9. | 23.59 ft | on 06-25-2019 |
| 10. | 23.21 ft | on 05-04-2019 |
| 11. | 17.47 ft | on 03-17-2019 |
| 12. | 19.45 ft | on 01-04-2019 |
| 13. | 23.92 ft | on 05-07-2017 |
| 14. | 30.55 ft | on 12-31-2015 |
| 15. | 21.75 ft | on 06-30-2015 |
| 16. | 18.07 ft | on 02-22-2014 |
| 17. | 24.05 ft | on 06-04-2013 |
| 18. | 25.67 ft | on 04-23-2013 |
| 19. | 11.11 ft | on 05-03-2012 |
| 20. | 22.14 ft | on 06-21-2011 |
| 21. | 23.71 ft | on 06-26-2010 |
| 22. | 23.40 ft | on 12-28-2009 |
| 23. | 24.10 ft | on 11-21-2009 |
| 24. | 24.24 ft | on 11-03-2009 |
| 25. | 22.75 ft | on 05-21-2009 |
| 26. | 26.08 ft | on 01-18-2005 |
| 27. | 26.30 ft | on 01-17-2005 |
| 28. | 23.62 ft | on 01-10-2005 |
| 29. | 30.75 ft | on 05-14-2002 |
| 30. | 27.45 ft | on 05-11-1996 |
| 31. | 29.84 ft | on 04-14-1994 |
| 32. | 23.04 ft | on 06-23-1990 |
| 33. | 23.10 ft | on 01-12-1975 |
| 34. | 26.50 ft | on 01-25-1974 |
| 35. | 26.10 ft | on 05-03-1970 |
| 36. | 24.20 ft | on 04-21-1969 |
| 37. | 33.90 ft | on 05-20-1943 |
Historic Crests
| 1. | 33.90 ft | on 05-20-1943 |
| 2. | 30.75 ft | on 05-14-2002 |
| 3. | 30.55 ft | on 12-31-2015 |
| 4. | 29.84 ft | on 04-14-1994 |
| 5. | 27.45 ft | on 05-11-1996 |
Historic Crests
| 1. | 33.90 ft | on 05-20-1943 |
| 2. | 30.75 ft | on 05-14-2002 |
| 3. | 30.55 ft | on 12-31-2015 |
| 4. | 29.84 ft | on 04-14-1994 |
| 5. | 27.45 ft | on 05-11-1996 |
| 6. | 26.50 ft | on 01-25-1974 |
| 7. | 26.30 ft | on 01-17-2005 |
| 8. | 26.10 ft | on 05-03-1970 |
| 9. | 26.08 ft | on 01-18-2005 |
| 10. | 25.67 ft | on 04-23-2013 |
| 11. | 24.24 ft | on 11-03-2009 |
| 12. | 24.20 ft | on 04-21-1969 |
| 13. | 24.10 ft | on 11-21-2009 |
| 14. | 24.05 ft | on 06-04-2013 |
| 15. | 23.92 ft | on 05-07-2017 |
| 16. | 23.80 ft | on 05-20-2020 |
| 17. | 23.71 ft | on 06-26-2010 |
| 18. | 23.62 ft | on 01-10-2005 |
| 19. | 23.59 ft | on 06-25-2019 |
| 20. | 23.40 ft | on 12-28-2009 |
| 21. | 23.21 ft | on 05-04-2019 |
| 22. | 23.10 ft | on 01-12-1975 |
| 23. | 23.04 ft | on 06-23-1990 |
| 24. | 22.75 ft | on 05-21-2009 |
| 25. | 22.59 ft | on 05-03-2020 |
| 26. | 22.56 ft | on 01-16-2020 |
| 27. | 22.14 ft | on 06-21-2011 |
| 28. | 21.75 ft | on 06-30-2015 |
| 29. | 19.45 ft | on 01-04-2019 |
| 30. | 19.30 ft | on 07-04-2021 |
| 31. | 18.97 ft | on 05-22-2021 |
| 32. | 18.73 ft | on 01-26-2024 |
| 33. | 18.07 ft | on 02-22-2014 |
| 34. | 17.80 ft | on 03-23-2020 |
| 35. | 17.64 ft | on 02-25-2022 |
| 36. | 17.47 ft | on 03-17-2019 |
| 37. | 11.11 ft | on 05-03-2012 |
Vertical Datum Table
| type | NAVD88 |
|---|---|
| major Flooding | 506.67 ft |
| moderate Flooding | 497.67 ft |
| minor Flooding | 496.67 ft |
| action | 491.67 ft |
| Latest Value | 479.23 ft |
| Gauge Zero | 473.67 ft |
Unique Local Info
USGS Streamflow Duration Hydrograph
How low could the river get?
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
Additional Resource Links
- NWS Precipitation and River Forecasting
- Area Hydrographs
- Snow Cover Information
- Palmer Drought Index
- U.S. Drought Monitor
- Seasonal Drought Outlook
- USGS - Central Midwest Water Science Center
- USGS WaterAlert
- USGS (map of sites)
- USGS (table of sites)
- USGS National Water Dashboard
- US Army Corps of Engineers
