River gauges›Missouri
RIVER GAUGE · BIG RIVER

Big River at Byrnesville

Jefferson County, Missouri

Water level1.79 ft
Flow128 cfs
Last readingSep 16, 2026, 4:45 PM UTC (last recorded)
Action13 ft
Minor flood16 ft
Moderate flood20 ft
Major flood28 ft

The past week

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What floods at each level

Highest crests on record

DateLevelFlow
Aug 20, 191530.2 ft80,000 cfs
May 1, 201730.09 ft62,900 cfs
Sep 24, 199329.37 ft63,600 cfs

Flood map

See which streets and areas flood at each water level here. Open the flood map ↗

More on Big River

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