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.


SISQUOC RIVER

Last Updated: December 19, 2025

Get the latest River Levels, Streamflow, and Hydrology for in River flows across 2 streamgages of the Sisquoc River


Summary

Total streamflow across the Sisquoc River was last observed at 244 cfs, and is expected to yield approximately 484 acre-ft of water today; about 100% of normal. Average streamflow for this time of year is 244 cfs, with recent peaks last observed on 2024-02-05 when daily discharge volume was observed at 5,530 cfs.

Maximum discharge along the river is currently at the Sisquoc R Nr Sisquoc Ca reporting a streamflow rate of 301 cfs. However, the streamgauge with the highest stage along the river is the Sisquoc R Nr Garey with a gauge stage of 7.1 ft. This river is monitored from 2 different streamgauging stations along the Sisquoc River, the highest being situated at an altitude of 627 ft, the Sisquoc R Nr Sisquoc Ca.

River Details

Last Updated 2025-02-15
Discharge Volume 484 ACRE-FT
Streamflow 244.0 cfs
None cfs (None%)
Percent of Normal 100.0%
Maximum 5,530.0 cfs
2024-02-05
Seasonal Avg cfs
       
River Streamflow Levels
Streamgauge Streamflow Gauge Stage 24hr Change (%) % Normal Minimum (cfs) Maximum (cfs) Air Temp Elevation
Sisquoc R Nr Sisquoc Ca
USGS 11138500
301 cfs 1.16 ft 23.36
Sisquoc R Nr Garey
USGS 11140000
0 cfs 7.1 ft None
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile

The river has a rich history as it was once inhabited by Chumash Indians and later served as a vital transportation route for Spanish explorers. The river is fed by several creeks and springs, making it an important hydrological resource for the region. The Twitchell Reservoir and Jameson Reservoir are two major dam and reservoir systems on the Sisquoc River that are used for agricultural irrigation purposes. The river also supports recreational activities such as camping, hiking, and fishing. Despite its importance, the Sisquoc River faces threats from habitat destruction and water pollution, and efforts are being made to conserve and restore this valuable resource.