Rivermatics

USGS Streamgage 13186000

SF Boise River near Featherville, ID

SF Boise River near Featherville, ID is USGS streamgage 13186000 in Idaho, monitoring river discharge in hydrologic subbasin 17050113. It sits on the Sf Boise River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 641 square miles. Discharge records at this site go back to 1945. Typical flow runs near 601.2 cfs in July and 1,071.2 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Idaho
Drainage area
641 sq mi
Subbasin (HUC-8)
17050113
Coordinates
43.49583, -115.30806
USGS site number
13186000
Records begin
1945-05-01 (81 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for SF Boise River near Featherville, ID. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
152 157 161
148 154 160
145 152 158
143 151 158
142 150 158
140 149 158
139 148 157
137 147 157
136 146 157
134 145 157
132 143 156
131 142 155
129 141 155
128 140 154

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 81 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 168.2 219.7 316.7
February 181.7 232.8 353
March 234.4 346 716.4
April 493.7 1,071.2 2,427
May 1,045.9 2,254.8 4,464.5
June 817.6 1,958.3 3,991.7
July 249.3 601.2 1,352
August 157.2 254.4 428.3
September 145.4 207.1 313.2
October 164.6 226.3 316.1
November 169 233.7 324.3
December 155.5 219.6 313.6

All values in cubic feet per second (cfs).

Common questions

When does SF Boise River near Featherville, ID normally run highest?
May, on the long-term record. The median daily flow that month is about 2,254.8 cfs, against 207.1 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for SF Boise River near Featherville, ID?
It depends on the month. In January, half of days historically fall near 219.7 cfs, with the middle 80% of days between 168.2 and 316.7 cfs. The month-by-month table on this page gives the full range.
How long has SF Boise River near Featherville, ID been measured?
Discharge records at USGS site 13186000 begin in 1945, about 81 years, covering roughly 9,201 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for SF Boise River near Featherville, ID?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is SF Boise River near Featherville, ID?
The gauge sits at 43.49583, -115.30806, in Idaho, in hydrologic subbasin 17050113, draining roughly 641 square miles.
Can I use SF Boise River near Featherville, ID data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Sf Boise River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Sf Boise River in full.

Other gauges in this subbasin