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
Floyd River
was last observed at
223
cfs, and is expected to yield approximately
442
acre-ft of water today; about 46%
of normal.
River levels are low and may signify a drought.
Average streamflow for this time of year is
480 cfs,
with recent peaks last observed
on
2018-09-21 when daily discharge volume was observed at
20,400 cfs.
Maximum discharge along the river is currently at the
Floyd River At James
reporting a streamflow rate of 187 cfs.
This is also the highest stage along the Floyd River, with a gauge stage of
8.73 ft at this location.
This river is monitored from 2 different streamgauging stations along the Floyd River, the highest being situated at an altitude of 1,289 ft, the
Floyd River At Alton.
River Details
| Last Updated | 2025-12-04 |
| Discharge Volume | 442 ACRE-FT |
| Streamflow |
222.6 cfs
-20.2 cfs (-8.32%) |
| Percent of Normal | 46.41% |
| Maximum |
20,400.0 cfs
2018-09-21 |
| Seasonal Avg | 480 cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Floyd River At Alton
USGS 06600100 |
36 cfs | 5.63 ft | -5.82 | |||||
|
Floyd River At James
USGS 06600500 |
187 cfs | 8.73 ft | -8.78 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Floyd River is a tributary of the Missouri River, 112 miles (180 km) long, in northwestern Iowa in the United States. It enters the Missouri at Sioux City, and is named for Charles Floyd, a member of the Lewis and Clark Expedition.