Rivers in Illinois
Mississippi River at New Boston
Action stage
14.03ftStage
Observed Wed, Sep 23, 3:40 PM CDT
- Flood stage
- 15.00 ft
- Forecast crest
- 14.10 ftWed, Sep 23, 7:00 PM CDT
- Record crest
- 25.90 ft1993
Flood stages and impacts
| Category | Stage |
|---|---|
| Major flood | 18.50 ft |
| Moderate flood | 16.50 ft |
| Minor flood | 15.00 ft |
| Action | 14.00 ft |
- 26.00 ftWater overtops the levee at L&D 17.
- 21.10 ftWater overtops the upper spillway at Lake Odessa.
- 21.00 ftWater affects grain elevators in New Boston. Water overtops the upper lock wall of L&D 17.
- 20.60 ftThe Lake Odessa levee overtops.
- 19.20 ftWater overtops the spillway at the south end of Lake Odessa.
- 18.10 ftLock and Dam 17 is closed.
Flood outlook
Chance of flooding, September to November
| Category | Chance |
|---|---|
| Minor flooding | 8% |
| Moderate flooding | 6% |
| Major flooding | Under 5% |
The three-month chances are the River Forecast Centers’ long-range flood outlook, issued August 28, 2026.
Crest history
58 crests on NOAA’s list since 1937.
| # | Date | Stage |
|---|---|---|
| 1 | July 9, 1993 | 25.90 ft |
| 2 | June 17, 2008 | 25.20 ft |
| 3 | June 1, 2019 | 24.42 ft |
| 4 | May 3, 2019 | 23.59 ft |
| 5 | April 28, 1965 | 23.14 ft |
| 6 | April 25, 2001 | 22.46 ft |
| 7 | May 1, 2008 | 21.83 ft |
| 8 | April 25, 1973 | 21.73 ft |
| 9 | April 10, 2019 | 21.04 ft |
| 10 | April 24, 2011 | 20.96 ft |
| 11 | May 3, 2023 | 20.85 ft |
| 12 | July 11, 2024 | 20.82 ft |
| 13 | April 26, 1969 | 19.76 ft |
| 14 | May 8, 1975 | 19.70 ft |
| 15 | April 21, 1997 | 19.67 ft |
| 16 | April 28, 1951 | 19.61 ft |
| 17 | October 7, 1986 | 19.50 ft |
| 18 | April 28, 1952 | 19.44 ft |
| 19 | June 26, 1974 | 18.98 ft |
| 20 | April 7, 1979 | 18.76 ft |
| 21 | September 30, 2016 | 18.70 ft |
| 22 | April 4, 1960 | 18.68 ft |
| 23 | May 12, 2018 | 18.47 ft |
| 24 | June 2, 2004 | 18.05 ft |
| 25 | June 29, 1944 | 18.04 ft |
Most recent crests
- April 24, 2026: 17.16 ft
- July 11, 2024: 20.82 ft
- May 3, 2023: 20.85 ft
- June 1, 2019: 24.42 ft
- May 3, 2019: 23.59 ft
- April 10, 2019: 21.04 ft
- May 12, 2018: 18.47 ft
- June 1, 2017: 17.79 ft
- September 30, 2016: 18.70 ft
- March 29, 2016: 16.24 ft
Nearby
Upstream, downstream and the gauges around this one.
What this means
Forecasts by the North Central River Forecast Center. Forecasts are issued routinely year-round. 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.
Sources
Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service.