River stage
Byrnesville, Big River
- River level
- 1.62 ft
- Status
- Below flood stage
- 7-day change
- -0.06 ft
- Recent high
- 7.04 ft
- Recent low
- 1.63 ft
Last reported 2026-10-13 | NWS BYRM7
- 30-day change
- -0.22 ft
- Average
- 2.48 ft
- Readings
- 122
- Data span
- 122 days
- Record crest
- 30.20 ft
In brief
The Big River at Byrnesville, MO read 1.62 ft on Oct 13, 2026, 11.38 ft below action stage. That is 0.22 ft lower than 30 days earlier.
Source: National Weather Service gauge BYRM7
River level timeline
Stage threshold profile
Highest crests on record
| Rank | Crest | Date |
|---|---|---|
| 1 | 30.20 ft | 1915-08-21 |
| 2 | 30.09 ft | 2017-05-01 |
| 3 | 29.37 ft | 1993-09-25 |
| 4 | 27.61 ft | 1993-11-16 |
| 5 | 27.57 ft | 1994-04-12 |
| 6 | 27.57 ft | 2008-03-20 |
| 7 | 27.57 ft | 2024-11-06 |
| 8 | 27.18 ft | 2015-12-29 |
Flood crests recorded at this gauge by the National Weather Service.
What happens at each level
- 15.50 ft
Rockford Beach Park at the Highway MM bridge begins flooding.
- 18.00 ft
Cedar Hill Road at Cedar Hill and Klondike Road south of Cedar Hill begin to flood near this height.
- 18.10 ft
State Highway BB southeast of Cedar Hill will be closed near this height.
- 19.00 ft
Dutch Creek Road south of Byrnesville and Byrnesville Road near John McKeever Road north of Byrnesville begin to flood.
- 19.10 ft
Backyards and one basement along Burgan Grove Road 2 miles west of House Springs begin to flood.
- 19.30 ft
South Byrnesville Road begins flooding near this level.
- 20.50 ft
Burgan Grove Road begins flooding near Cottage Grove Road, cutting off access to Cottage Grove Road. Highway W near Hoene Spring is closed as water crosses the pavement.
- 22.40 ft
At this level, Twin Rivers Bridge Road must be closed.
- 26.00 ft
Based on NWC stage-based categorical flood inundation mapping, at this height water will begin flooding the outfields of the 2 easternmost ball fields at the Northwest Jefferson County Sports Complex.
- 28.00 ft
At this height, several homes along Burgan Grove Road are flooded.
Written by the local National Weather Service forecast office for this exact gauge.
Frequently asked questions
Is the Big River flooding at Byrnesville?
No. The Big River at Byrnesville is at 1.62 ft, 11.38 ft below action stage.
What is the flood stage at Byrnesville?
The National Weather Service sets action stage 13 ft, minor flooding 16 ft, moderate flooding 20 ft and major flooding 28 ft.
What is the highest the Big River has been at Byrnesville?
The highest crest on record is 30.2 ft, on 1915-08-21.
Is the Big River high or low right now at Byrnesville?
At 1.62 ft it is higher than 0% of readings over the last 122 days.
Stage and flood information from the NOAA National Weather Service (gauge BYRM7); daily history from the U.S. Geological Survey (site 07018500). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.