Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Weather Forecast Office Lincoln, IL

North Central River Forecast Center

Hydrograph

River at a Glance

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Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental)

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Printable Image About this graph Tabular Data (UTC) Tabular Data (CDT) Datum: NAVD88 Metadata

NOTE: 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. NOTE: Forecasts for the Sangamon River at Petersburg are issued as needed during times of high water, but are not routinely available. Vertical Datum updated from NGVD29 to NAVD88 by gauge owner.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 33 Moderate Flood Stage: 24 Flood Stage: 23 Action Stage: 18 Low Stage (in feet): -9999 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 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 17.64 ft on 02/25/2022 (2) 19.30 ft on 07/04/2021 (3) 18.97 ft on 05/22/2021 (4) 23.80 ft on 05/20/2020 (5) 22.59 ft on 05/03/2020 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available. For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:15 Legend FEMA Layer Gauge Location Disclaimer Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

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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.
22	Altig Bridge Ave. closed due to water over the west approach roadway.
21	Park and recreational land near the river in Petersburg is flooded.
15	Water begins to flood agricultural areas and local parks near the river.
Photos (1) Looking Upstream (Stage: 6.45 ft) (2) Looking Downstream (Stage: 6.45 ft)

About This Location

Latitude: 40.013333° N, Longitude: 89.838333° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 23 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source NAVD88 473.67 ft 496.67 ft Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 474.00 ft 497.00 ft Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available   Current/Historical Observations: Corps of Engineers (COE) Info for Petersburg U.S. Geological Survey (USGS) Data and Site Info for Petersburg

Additional Information

USGS Streamflow Duration Hydrograph How low could the river get?

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Precipitation Frequency Information Inundation Mapping Locations NCRFC Ensemble River Forecasts OHRFC Ensemble River Forecasts OHRFC Water Resources Outlook

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management 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

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. NWS Information National Weather Service Lincoln Weather Forecast Office 1362 State Route 10 Lincoln, IL 62656 (217) 732-3089 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:29 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities