Rivermatics

USGS Streamgage 13068495

Blackfoot River Bypass near Blackfoot, ID

Blackfoot River Bypass near Blackfoot, ID is USGS streamgage 13068495 in Idaho, monitoring river discharge in hydrologic subbasin 17040207. Discharge records at this site go back to 1964. Typical flow runs near 13.3 cfs in July and 44.1 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
Subbasin (HUC-8)
17040207
Coordinates
43.17083, -112.38778
USGS site number
13068495
Records begin
1964-04-16 (62 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Blackfoot River Bypass near Blackfoot, 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
0 0.1 1.1
0 0.1 7.1
0 0.1 3
0 0 2.8
0 0 4.5
0 0 4.7
0 0 5.1
0 0 1.9
0 0.1 1.1
0 0 1.5
0 0 2.2
0 0 3
0 0 2.2
0 0 1.9

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 62 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 0 3 83.7
February 0 6.3 122.9
March 0 13 239.8
April 0 44.1 436.9
May 0 66.3 755.7
June 0 36.7 420.5
July 0 13.3 159.6
August 0 11.1 190.9
September 0 19.4 154.2
October 4.2 103.9 286.5
November 1 26.4 247.1
December 0 4.9 58.8

All values in cubic feet per second (cfs).

Common questions

When does Blackfoot River Bypass near Blackfoot, ID normally run highest?
October, on the long-term record. The median daily flow that month is about 103.9 cfs, against 3 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Blackfoot River Bypass near Blackfoot, ID?
It depends on the month. In January, half of days historically fall near 3 cfs, with the middle 80% of days between 0 and 83.7 cfs. The month-by-month table on this page gives the full range.
How long has Blackfoot River Bypass near Blackfoot, ID been measured?
Discharge records at USGS site 13068495 begin in 1964, about 62 years, covering roughly 9,199 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Blackfoot River Bypass near Blackfoot, 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 Blackfoot River Bypass near Blackfoot, ID?
The gauge sits at 43.17083, -112.38778, in Idaho, in hydrologic subbasin 17040207.
Can I use Blackfoot River Bypass near Blackfoot, 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.

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