Floyd River River Levels

Last Updated: December 4, 2025

The Floyd River runs through Iowa and South Dakota, covering a length of 111 miles.


Summary

Total streamflow across the Floyd River was last observed at 223 cfs, and is expected to yield approximately 442 acre-ft of water today; about 46% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 480 cfs, with recent peaks last observed on 2018-09-21 when daily discharge volume was observed at 20,400 cfs.

Maximum discharge along the river is currently at the Floyd River At James reporting a streamflow rate of 187 cfs. This is also the highest stage along the Floyd River, with a gauge stage of 8.43 ft at this location. This river is monitored from 2 different streamgauging stations along the Floyd River, the highest being situated at an altitude of 1,289 ft, the Floyd River At Alton.

River Details

Last Updated 2025-12-04
Discharge Volume 442 ACRE-FT
Streamflow 222.6 cfs
-20.2 cfs (-8.32%)
Percent of Normal 46.41%
Maximum 20,400.0 cfs
2018-09-21
Seasonal Avg 480 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Floyd River At Alton
USGS 06600100
36 cfs 5.46 ft -5.82
Floyd River At James
USGS 06600500
187 cfs 8.43 ft -8.78
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Floyd River is a tributary of the Missouri River, 112 miles (180 km) long, in northwestern Iowa in the United States. It enters the Missouri at Sioux City, and is named for Charles Floyd, a member of the Lewis and Clark Expedition.