Big River at Byrnesville, MO
Is Big River at Byrnesville, MO flooding right now?
Big River at Byrnesville, MO measured 1.79 ft on 2026-09-22 21:45:00 UTC. That observation was 14.2 ft below its 16 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
1.79 ft
Streamflow
128 cfs
Minor flooding here begins at 16 ft, with major flooding at 28 ft. The highest crest on record was 30.2 ft on Sat, Aug 21, 1915.
Streamflow outlook
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 13 ft | 11.2 ft below |
| Minor flood | 16 ft | 14.2 ft below |
| Moderate flood | 20 ft | 18.2 ft below |
| Major flood | 28 ft | 26.2 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 30.2 ft | 1915-08-21 |
| 30.09 ft | 2017-05-01 |
| 29.37 ft | 1993-09-25 |
| 27.61 ft | 1993-11-16 |
| 27.57 ft | 1994-04-12 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Meramec River at Pacific, MO | 7.4 mi | Franklin County |
| Fox Creek at Allenton, MO | 7.9 mi | St. Louis County |
| Meramec River near Eureka, MO | 8.2 mi | St. Louis County |
| Williams Creek near Peerless Park, MO | 11.9 mi | St. Louis County |
| Keifer Creek near Ballwin, MO | 12.2 mi | St. Louis County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.