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 of 30-40 mph with gusts as high as 85 mph in the foothills of Boulder and northern Jefferson Counties will continue until early evening. Relative humidity values had dropped into the upper single digits and lower teens. Thus, the Particularly Dangerous Situation will remain in place til around 5-6 pm, with only a slow improvement thereafter as winds slowly weaken. Red Flag conditions, however, will persist through the rest of the evening as we remain in a near record warm, dry, and windy airmass along the Front Range through midnight. In fact, strong, gusty winds will persist through much of the night with only a slow improvement in humidity values. Thus, near critical Red Flag conditions will occur into early Saturday morning. While most of the Denver metro area has seen lighter winds prevail most of the day, a period of strong, gusty winds is expected to develop this evening and likely last past midnight, producing Red Flag conditions there. * AFFECTED AREA...Fire Weather Zones 238, 240, 241, 242 and 243. * TIMING...Until midnight MST tonight. * WINDS...West 15 to 25 mph with gusts up to 50 mph. * RELATIVE HUMIDITY...As low as 9 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
Little Sioux River
was last observed at
1,624
cfs, and is expected to yield approximately
3,221
acre-ft of water today; about 48%
of normal.
River levels are low and may signify a drought.
Average streamflow for this time of year is
3,380 cfs,
with recent peaks last observed
on
2019-03-16 when daily discharge volume was observed at
75,900 cfs.
Maximum discharge along the river is currently at the
Little Sioux River Near Turin
reporting a streamflow rate of 1,040 cfs.
This is also the highest stage along the Little Sioux River, with a gauge stage of
8.36 ft at this location.
This river is monitored from 3 different streamgauging stations along the Little Sioux River, the highest being situated at an altitude of 1,249 ft, the
Little Sioux River At Linn Grove.
River Details
| Last Updated | 2025-12-04 |
| Discharge Volume | 3,221 ACRE-FT |
| Streamflow |
1,624.0 cfs
+44.0 cfs (+2.78%) |
| Percent of Normal | 48.04% |
| Maximum |
75,900.0 cfs
2019-03-16 |
| Seasonal Avg | 3,380 cfs |
River Streamflow Levels
| Streamgauge | Streamflow | Gauge Stage | 24hr Change (%) | % Normal | Minimum (cfs) | Maximum (cfs) | Air Temp | Elevation |
|---|---|---|---|---|---|---|---|---|
|
Little Sioux River At Linn Grove
USGS 06605850 |
257 cfs | 5.79 ft | 21.23 | |||||
|
Little Sioux River At Correctionville
USGS 06606600 |
327 cfs | 5.03 ft | -8.66 | |||||
|
Little Sioux River Near Turin
USGS 06607500 |
1040 cfs | 8.36 ft | 2.97 |
Seasonal Discharge Comparison
Maximum Streamflow Discharge
Streamflow Elevation Profile
The Little Sioux River is a river in the United States. It rises in southwestern Minnesota near the Iowa border, and continues to flow southwest for 258 miles (415 km) across northwest Iowa into the Missouri River at Little Sioux. The Little Sioux River was known as Eaneah-waudepon or "Stone River" to the Sioux Indians. Its tributaries include the Ocheyedan River, Maple River and the West Fork of the Little Sioux River. The Little Sioux River is integral to the Nepper Watershed Project, a major Iowa flood control and soil conservation program that was introduced in 1947.
The Little Sioux Valley was important in the Spirit Lake Massacre of 1857, when the Santee Sioux chief Inkpaduta made forays as far downstream as Smithland. The river valley also figures prominently in folklore about the nineteenth century outlaw, Jesse James, who reportedly used the secluded valley, with its wooded ravines, as a hideout and a route north to Minnesota during the 1870s.
Geologically, the Little Sioux rises in a region of glacial potholes near the "Iowa Great Lakes" (Spirit Lake, and East and West Okoboji). It then traverses a rich agricultural region on its way to the Loess Hills, from which it then flows out onto the floodplain of the Missouri River. Through much of its middle course (i.e., from Linn Grove to Smithland) the Little Sioux is a relatively wild meandered stream, with excellent canoeing, camping, and fishing opportunities. However, from Smithland downstream to its mouth, the river has been channelized and environmentally degraded.
Flooding of the river is common in early to late spring, as the often-heavy winter snow melts. This has resulted in riparian woodlands of cottonwood trees adjacent to fertile farm ground on the bottomlands. Correspondingly, hunters are rewarded with a bounty of white-tailed deer, rabbits and pheasants during the fall hunting season.
Fishing opportunities are best in late spring after flood waters have dissipated. Edible gamefish such as bullhead and channel catfish are frequently caught with nothing more than a hook and worm, with northern pike, walleye, and shovelnose sturgeon also available.