Red Flag Warning
2025-12-20T00:00:00-07:00

...THIS IS A PARTICULARLY DANGEROUS SITUATION FOR IN AND IMMEDIATELY ADJACENT TO THE FOOTHILLS, BETWEEN 5500 AND 9000 FEET, FOR BOULDER AND JEFFERSON COUNTIES ON FRIDAY... Strong west winds, sustained 45-55 mph with gusts upwards of 85- 105 mph, are expected in the foothills of Larimer, Boulder and Jefferson Counties beginning early Friday morning. Relative humidity values are expected to drop into the low teens, possibly upper single digits. While Red Flag conditions, critical fire weather, are expected across a larger area in northern Colorado, the most extreme conditions are expected to be along Highway 93 from Jefferson County into Boulder County and along US-36 north of Boulder to the Larimer County line and westward. There will be a high potential for fast moving wildfires, should any new starts occur. Winds toward I-25 and eastward will be slower to develop, and also speeds will be considerably lighter. That said, gusts of 25- 40 mph are still expected to combine with very low humidity and cured grasses to support critical fire weather conditions. Such conditions may be a longer duration than usual, with potential for low humidity to extend well into the evening hours. * AFFECTED AREA...Fire Weather Zones 238, 240, 241, 242 and 243. * TIMING...From 10 AM this morning to midnight MST tonight. * WINDS...West 15 to 25 mph with gusts up to 60 mph possible west of I-25, and gusts to 40 mph possible along and east of I- 25. * RELATIVE HUMIDITY...As low as 12 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.


Little Bighorn River River Levels

Last Updated: December 19, 2025

The Little Bighorn River is a 138-mile-long tributary of the Bighorn River in Montana and Wyoming.


Summary

Total streamflow across the Little Bighorn River was last observed at 306 cfs, and is expected to yield approximately 606 acre-ft of water today; about 103% of normal. Average streamflow for this time of year is 297 cfs, with recent peaks last observed on 2019-12-01 when daily discharge volume was observed at 5,766 cfs.

Maximum discharge along the river is currently at the Little Bighorn River Near Hardin Mt reporting a streamflow rate of 222 cfs. This is also the highest stage along the Little Bighorn River, with a gauge stage of 3.12 ft at this location. This river is monitored from 2 different streamgauging stations along the Little Bighorn River, the highest being situated at an altitude of 4,332 ft, the Little Bighorn River At State Line Nr Wyola Mt.

River Details

Last Updated 2025-12-12
Discharge Volume 606 ACRE-FT
Streamflow 305.6 cfs
+22.7 cfs (+8.02%)
Percent of Normal 102.74%
Maximum 5,765.5 cfs
2019-12-01
Seasonal Avg 297 cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Little Bighorn River At State Line Nr Wyola Mt
USGS 06289000
78 cfs 2.06 ft 0
Little Bighorn River Near Hardin Mt
USGS 06294000
222 cfs 3.12 ft 9.36
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The Little Bighorn River is a 138-mile-long (222 km) tributary of the Bighorn River in the United States in the states of Montana and Wyoming. The Battle of the Little Bighorn, also known as the Battle of the Greasy Grass, was fought on its banks on June 25–26, 1876, as well as the Battle of Crow Agency in 1887.