2026-01-26T09:00:00-07:00
* WHAT...Very cold wind chills as low as 23 below. * WHERE...The Denver metro, including eastern Boulder County, and south into the Palmer Divide, including Castle Rock and Larkspur. * WHEN...Until 9 AM MST Monday. * IMPACTS...The dangerously cold wind chills could result in hypothermia or frostbite if precautions are not taken.
Summary
Total streamflow across the
Boulder River
was last observed at
177
cfs, and is expected to yield approximately
351
acre-ft of water today; about 87%
of normal.
Average streamflow for this time of year is
203 cfs,
with recent peaks last observed
on
2011-07-01 when daily discharge volume was observed at
9,175 cfs.
Maximum discharge along the river is currently at the
Boulder River At Big Timber Mt
reporting a streamflow rate of 148 cfs.
However, the streamgauge with the highest stage along the river is the
Boulder River Near Boulder Mt
with a gauge stage of 4.84 ft.
This river is monitored from 2 different streamgauging stations along the Boulder River, the highest being situated at an altitude of 4,823 ft, the
Boulder River Near Boulder Mt.
River Details
| Last Updated | 2026-01-12 |
| Discharge Volume | 351 ACRE-FT |
| Streamflow |
177.1 cfs
-5.5 cfs (-3.01%) |
| Percent of Normal | 87.43% |
| Maximum |
9,175.0 cfs
2011-07-01 |
| Seasonal Avg | 203 cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Boulder River Near Boulder Mt
USGS 06033000 |
15 cfs | 4.84 ft | -17.58 | |||||
|
Boulder River At Big Timber Mt
USGS 06200000 |
148 cfs | 1.29 ft | -1.99 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Boulder River is a 77-mile (124 km) tributary of the Jefferson River in southwestern Montana in the United States.It rises in the Rocky Mountains at the continental divide in the Beaverhead-Deerlodge National Forest in western Jefferson County. It flows east and southeast through the mountains past Boulder, then south to join the Jefferson near Cardwell.Game fish in the river include brook, brown, and rainbow trout, and mountain whitefish. Brown trout are most prevalent in the last 2 miles (3 km), near the mouth, and the other three species are more prevalent in the reach upstream of the town of Boulder. The lowermost 12 miles (19 km) of the river is affected by irrigation withdrawals, and the reach below the community of Basin is affected by seepage from old mines and tailings.