River stage
Sullivan, Meramec River
- River level
- 2.92 ft
- Status
- Below flood stage
- 7-day change
- -0.10 ft
- Recent high
- 21.45 ft
- Recent low
- 2.88 ft
Last reported 2026-10-13 | NWS SLLM7
- 30-day change
- -0.19 ft
- Average
- 3.89 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 36.52 ft
In brief
The Meramec River at Sullivan, MO read 2.92 ft on Oct 13, 2026, 6.08 ft below action stage. That is 0.19 ft lower than 30 days earlier.
Source: National Weather Service gauge SLLM7
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 36.52 ft | 2017-05-01 |
| 2 | 33.50 ft | 1915-08-01 |
| 3 | 32.22 ft | 1982-12-04 |
| 4 | 32.00 ft | 1945-06-09 |
| 5 | 31.69 ft | 2008-03-20 |
| 6 | 31.48 ft | 2015-12-29 |
| 7 | 30.71 ft | 2024-11-06 |
| 8 | 29.23 ft | 1994-04-12 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 6.00 ft
When the river is rising above this height, canoe outfitters will generally not rent out canoes or rafts.
- 11.00 ft
Right Bank begins to overflow flooding wooded areas.
- 11.50 ft
A small bridge in the back of Meramec State Park park is flooded, cutting the park in two. If the river continues to rise...park officials will evacuate the campgrounds at this point.
- 12.00 ft
The main entrance gate at Onondaga Cave State Park begins flooding near this height. This may eventually force the park to use the rear entrance as the primary entrance to the park.
- 13.50 ft
Cave Road begins flooding at Onondaga Cave State Park near this height.
- 14.00 ft
The main entrance road to the Meramec State Park campground begins flooding...blocking acess to cabins 1-8...the picnic and playground areas, and the Wilderness Trailhead parking lot. At Onondaga Cave State Park...the primary entrance to the campground is closed and the secondary entrance is used near this height.
- 14.50 ft
At this height the Arapaho Campground will evacuate campers. This campground is about 8.5 river miles downstream from the gage. About 14.3 miles upstream of the gage...Cave Road access to Ozark Outdoors begins flooding near this height.
- 15.60 ft
The basic loop of the Onondaga Cave State Park campground begins flooding near this height.
- 17.00 ft
At this height the entire Arapaho campground will be under water.
- 17.30 ft
The Onondaga Cave State Park picnic shelter begins flooding near this height.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Meramec River flooding at Sullivan?
No. The Meramec River at Sullivan is at 2.92 ft, 6.08 ft below action stage.
What is the flood stage at Sullivan?
The National Weather Service sets action stage 9 ft, minor flooding 11 ft, moderate flooding 20 ft and major flooding 29 ft.
What is the highest the Meramec River has been at Sullivan?
The highest crest on record is 36.52 ft, on 2017-05-01.
Is the Meramec River high or low right now at Sullivan?
At 2.92 ft it is higher than 1% of readings over the last 122 days.
Stage and flood information from the NOAA National Weather Service (gauge SLLM7); daily history from the U.S. Geological Survey (site 07014500). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.