Major Flood
33 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
24 ft
Minor Flood
23 ft
Action Stage
18 ft
What Floods at Each Level
29 ft
Route 123 is closed. Water overtops Illinois Midland railroad tracks at 4th Street.
25 ft
Some residences on the east side of Petersburg flood.
23 ft
Extensive agricultural and lowland flooding occurs.
22 ft
Altig Bridge Ave. closed due to water over the west approach roadway.
21 ft
Park and recreational land near the river in Petersburg is flooded.
15 ft
Water begins to flood agricultural areas and local parks near the river.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| May 19, 1943 | 33.9 ft | — |
| May 13, 2002 | 30.75 ft | — |
| Dec 31, 2015 | 30.55 ft | 44,800 cfs |
About This Gauge
Get Flood Alerts for Sangamon River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Sangamon River at Petersburg?
The Sangamon River at Petersburg gauge is maintained by USGS (site 05578000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Sangamon River at Petersburg?
The NWS-defined flood stage for Sangamon River at Petersburg is 23 feet. Action stage begins at 18 feet. Moderate flooding starts at 24 feet, and major flooding at 33 feet.
How do I get alerts when Sangamon River rises?
Download StormCast free on Google Play, go to River Gauges, and add Sangamon River at Petersburg to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category.
Where is the Sangamon River at Petersburg gauge located?
The gauge is located in Menard County, Illinois at coordinates 40.0133°N, 89.8383°W. USGS site number: 05578000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: U.S. Geological Survey, Observations courtesy of U.S. Geological Survey
- 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.