Red Flag Warning
2026-04-23T00:00:00-06:00

* AFFECTED AREA...Fire Weather Zones 214, 215, 216, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250 and 251. * TIMING...From 10 AM Wednesday to midnight MDT Wednesday night. * WINDS...Southwest 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 6 percent. * IMPACTS...Conditions will be favorable for rapid fire spread. Avoid outdoor burning and any activity that may produce a spark and start a wildfire.

Marmaton River

Last Updated: April 21, 2026

Total streamflow across the Marmaton River was last observed at 10,590 cfs, and is expected to yield approximately 21,005 acre-ft of water today; about 204% of normal. River levels are high. Average streamflow for this time of year is 5,198 cfs, with recent peaks last observed on 2019-05-22 when daily discharge volume was observed at 39,650 cfs.

Maximum discharge along the river is currently at the Marmaton River Near Nevada reporting a streamflow rate of 8,740 cfs. This is also the highest stage along the Marmaton River, with a gauge stage of 23.27 ft at this location. This river is monitored from 3 different streamgauging stations along the Marmaton River, the highest being situated at an altitude of 881 ft, the Marmaton R Nr Uniontown.

The Marmaton River is a tributary of the Little Osage River and spans approximately 102 miles in length, flowing through southeastern Kansas and southwestern Missouri.


15-Day Long Term Forecast


River Details

Last Updated 2026-04-21
Discharge Volume 21,005 ACRE-FT
Streamflow 10,590.0 cfs
Past 24 Hours: -3183.0 cfs (-23.11%)
Percent of Normal 203.74%
Maximum 39,650.0 cfs
2019-05-22
Seasonal Avg 5,198 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Marmaton R Nr Uniontown
USGS 06917240
240 cfs 2.07 ft -27.93
Marmaton R Nr Fort Scott
USGS 06917500
1610 cfs 19.48 ft -54.39
Marmaton River Near Nevada
USGS 06918060
8740 cfs 23.27 ft -11.81
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Marmaton River (MAR-muh-tuhn) is a 102-mile-long (164 km) tributary of the Little Osage River in southeastern Kansas and western Missouri in the United States. Via the Little Osage, Osage and Missouri rivers, it is part of the watershed of the Mississippi River.