Winter Weather Advisory
2026-03-07T00:00:00-07:00

* WHAT...Snow and blowing snow expected. Total snow accumulations between 5 and 8 inches, with the heaviest snow south of Castle Rock. Winds gusting as high as 35 mph. * WHERE...Castle Rock. * WHEN...From 6 AM this morning to midnight MST tonight. * IMPACTS...Travel could be very difficult. The hazardous conditions will impact the Friday morning and evening commutes.


Floyd River River Levels

Last Updated: March 6, 2026

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 177 cfs, and is expected to yield approximately 352 acre-ft of water today; about 28% of normal. River levels are low and may signify a drought. Average streamflow for this time of year is 628 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 159 cfs. This is also the highest stage along the Floyd River, with a gauge stage of 8.3 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.




15-Day Weather Outlook


River Details

Last Updated 2026-03-05
Discharge Volume 352 ACRE-FT
Streamflow 177.3 cfs
+1.2 cfs (+0.68%)
Percent of Normal 28.23%
Maximum 20,400.0 cfs
2018-09-21
Seasonal Avg 628 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Floyd River At Alton
USGS 06600100
27 cfs 5.53 ft -3.19
Floyd River At James
USGS 06600500
159 cfs 8.3 ft 1.32
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.