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
Ashuelot River
was last observed at
114
cfs, and is expected to yield approximately
225
acre-ft of water today; about 4%
of normal.
River levels are low and may signify a drought.
Average streamflow for this time of year is
2,547 cfs,
with recent peaks last observed
on
2021-07-20 when daily discharge volume was observed at
11,380 cfs.
Maximum discharge along the river is currently at the
Ashuelot River At Hinsdale
reporting a streamflow rate of 225 cfs.
However, the streamgauge with the highest stage along the river is the
Ashuelot River Above The Branch
with a gauge stage of 64.69 ft.
This river is monitored from 5 different streamgauging stations along the Ashuelot River, the highest being situated at an altitude of 810 ft, the
Ashuelot River Near Gilsum.
River Details
| Last Updated | 2025-12-19 |
| Discharge Volume | 225 ACRE-FT |
| Streamflow |
113.6 cfs
+1.5 cfs (+1.34%) |
| Percent of Normal | 4.46% |
| Maximum |
11,380.0 cfs
2021-07-20 |
| Seasonal Avg | 2,547 cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Ashuelot River Near Gilsum
USGS 01157000 |
13 cfs | 1.82 ft | -14.84 | |||||
|
Ashuelot River Below Surry Mt Dam
USGS 01158000 |
19 cfs | 4.74 ft | 0 | |||||
|
Ashuelot River Above The Branch
USGS 01158110 |
21 cfs | 64.69 ft | -43.4 | |||||
|
Ashuelot River At West Swanzey
USGS 01160350 |
95 cfs | 5.29 ft | 1.61 | |||||
|
Ashuelot River At Hinsdale
USGS 01161000 |
225 cfs | 3.39 ft | 38.89 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Ashuelot River is a tributary of the Connecticut River, approximately 64 miles (103 km) long, in southwestern New Hampshire in the United States. It drains a mountainous area of 425 square miles (1,101 km2), including much of the area known as the Monadnock Region. It is the longest tributary of the Connecticut River within New Hampshire.