Mississippi River at New Boston
Illinois — Water Level & Flood Stage
Located in Mercer County, Illinois on the Mississippi River. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
Loading...
Streamflow
Loading...
Last Reading
Loading...
This is an NWS forecast point (LID: NBOI2). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
18.5 ft
Moderate Flood
16.5 ft
Minor Flood
15 ft
Action Stage
14 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
26 ft
Water overtops the levee at L&D 17.
21.1 ft
Water overtops the upper spillway at Lake Odessa.
21 ft
Water affects grain elevators in New Boston. Water overtops the upper lock wall of L&D 17.
20.6 ft
The Lake Odessa levee overtops.
19.2 ft
Water overtops the spillway at the south end of Lake Odessa.
18.1 ft
Lock and Dam 17 is closed.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
Loading chart data...
Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jul 8, 1993 | 25.9 ft | — |
| Jul 8, 1993 | 25.9 ft | — |
| Jun 16, 2008 | 25.2 ft | — |
| Jun 16, 2008 | 25.2 ft | — |
| Jun 1, 2019 | 24.42 ft | 332,390 cfs |
About This Gauge
NWS LID
NBOI2
River
Mississippi River
County
Mercer, IL
Coordinates
41.1914°N, 91.0556°W
Get Flood Alerts for Mississippi 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 Mississippi River at New Boston?
The Mississippi River at New Boston gauge is maintained by USGS 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 Mississippi River at New Boston?
The NWS-defined flood stage for Mississippi River at New Boston is 15 feet. Action stage begins at 14 feet. Moderate flooding starts at 16.5 feet, and major flooding at 18.5 feet.
How do I get alerts when Mississippi River rises?
Download StormCast free on Google Play, go to River Gauges, and add Mississippi River at New Boston to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Mississippi River at New Boston gauge located?
The gauge is located in Mercer County, Illinois at coordinates 41.1914°N, 91.0556°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Mississippi River
On This River
More Resources
Source & Notes
Data provided by: U.S. Army Corps of Engineers, Observations courtesy of U.S. Army Corps of Engineers
- River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 48 hours into the future from the forecast issuance time.