River stage
Thebes, Mississippi River
- River level
- 20.36 ft
- Status
- Below flood stage
- 7-day change
- -6.32 ft
- Recent high
- 30.77 ft
- Recent low
- 6.77 ft
Last reported 2026-10-13 | NWS THBI2
- 30-day change
- +12.47 ft
- Average
- 18.34 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 47.74 ft
In brief
The Mississippi River at Thebes, IL read 20.36 ft on Oct 13, 2026, 9.64 ft below action stage. That is 12.47 ft higher than 30 days earlier.
Source: National Weather Service gauge THBI2
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 47.74 ft | 2016-01-02 |
| 2 | 45.91 ft | 1995-05-23 |
| 3 | 45.52 ft | 2011-05-03 |
| 4 | 45.51 ft | 1993-08-07 |
| 5 | 45.15 ft | 1844-07-04 |
| 6 | 44.74 ft | 2011-04-29 |
| 7 | 44.31 ft | 2002-05-18 |
| 8 | 43.66 ft | 2019-06-11 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 33.00 ft
The town of Gale begins to flood.
- 34.00 ft
The town of Thebes begins to flood.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Mississippi River flooding at Thebes?
No. The Mississippi River at Thebes is at 20.36 ft, 9.64 ft below action stage.
What is the flood stage at Thebes?
The National Weather Service sets action stage 30 ft, minor flooding 33 ft, moderate flooding 37 ft and major flooding 42 ft.
What is the highest the Mississippi River has been at Thebes?
The highest crest on record is 47.74 ft, on 2016-01-02.
Is the Mississippi River high or low right now at Thebes?
At 20.36 ft it is higher than 57% of readings over the last 122 days.
Stage and flood information from the NOAA National Weather Service (gauge THBI2); daily history from the U.S. Geological Survey (site 07022000). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.