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.
Summary
Total streamflow across the
Okanogan River
was last observed at
16,167
cfs, and is expected to yield approximately
32,067
acre-ft of water today; about 348%
of normal.
River levels are high.
Average streamflow for this time of year is
4,642 cfs,
with recent peaks last observed
on
2018-05-12 when daily discharge volume was observed at
69,180 cfs.
Maximum discharge along the river is currently at the
Okanogan River At Malott
reporting a streamflow rate of 8,010 cfs.
However, the streamgauge with the highest stage along the river is the
Okanogan River Near Tonasket
with a gauge stage of 10.04 ft.
This river is monitored from 3 different streamgauging stations along the Okanogan River, the highest being situated at an altitude of 887 ft, the
Okanogan River At Oroville.
River Details
| Last Updated | 2025-12-19 |
| Discharge Volume | 32,067 ACRE-FT |
| Streamflow |
16,167.0 cfs
-2532.0 cfs (-13.54%) |
| Percent of Normal | 348.31% |
| Maximum |
69,180.0 cfs
2018-05-12 |
| Seasonal Avg | 4,642 cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Okanogan River At Oroville
USGS 12439500 |
347 cfs | 6.36 ft | 12.3 | |||||
|
Okanogan River Near Tonasket
USGS 12445000 |
7810 cfs | 10.04 ft | -12.15 | |||||
|
Okanogan River At Malott
USGS 12447200 |
8010 cfs | 7.87 ft | -15.68 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Okanogan River (known as the Okanagan River in Canada) is a tributary of the Columbia River, approximately 115 mi (185 km) long, in southern British Columbia and north central Washington. It drains a scenic plateau region called the Okanagan Country east of the Cascade Range and north and west of the Columbia, and also the Okanagan region of British Columbia. The Canadian portion of the river has been channelized since the mid-1950s.
Similkameen River Segment 2
Similkameen River Segment 1