Rivermatics

USGS Streamgage 13057155

Snake River Ab Eagle Rock near Idaho Falls, ID

Snake River Ab Eagle Rock near Idaho Falls, ID is USGS streamgage 13057155 in Idaho, monitoring river discharge in hydrologic subbasin 17040201. It sits on the Snake River, alongside 30 other gauges Rivermatics tracks on the same river. It drains a watershed of about 9,533 square miles. Discharge records at this site go back to 1987. Typical flow runs near 7,134.8 cfs in July and 4,856 cfs in April, with the higher of the two arriving in July. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

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Gauge details

State
Idaho
Drainage area
9,533 sq mi
Subbasin (HUC-8)
17040201
Coordinates
43.60472, -112.05861
USGS site number
13057155
Records begin
1987-10-01 (39 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Snake River Ab Eagle Rock near Idaho Falls, 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
5,099 5,390 5,597
4,983 5,371 5,673
4,856 5,321 5,719
4,667 5,282 5,744
4,522 5,234 5,781
4,379 5,187 5,798
4,323 5,193 5,858
4,332 5,193 5,937
4,326 5,189 6,000
4,245 5,156 5,972
4,193 5,132 5,968
4,120 5,106 5,965
4,058 5,083 5,972
3,987 5,054 5,957

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 39 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 1,834.5 2,558.4 5,108.7
February 1,969 2,675.9 6,749.7
March 2,069.7 2,769.7 11,081.3
April 2,389 4,856 16,780
May 5,086.5 9,170.3 20,151.6
June 5,976.3 8,865.7 22,216.7
July 5,691.9 7,134.8 12,674.2
August 4,732.6 6,034.2 9,272.3
September 3,721.3 4,901.3 6,770.3
October 2,362.6 3,243.9 4,691.6
November 2,333 2,965 5,146.7
December 1,910 2,714.2 5,062.9

All values in cubic feet per second (cfs).

Common questions

When does Snake River Ab Eagle Rock near Idaho Falls, ID normally run highest?
May, on the long-term record. The median daily flow that month is about 9,170.3 cfs, against 2,558.4 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 Snake River Ab Eagle Rock near Idaho Falls, ID?
It depends on the month. In January, half of days historically fall near 2,558.4 cfs, with the middle 80% of days between 1,834.5 and 5,108.7 cfs. The month-by-month table on this page gives the full range.
How long has Snake River Ab Eagle Rock near Idaho Falls, ID been measured?
Discharge records at USGS site 13057155 begin in 1987, about 39 years, covering roughly 9,198 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Snake River Ab Eagle Rock near Idaho Falls, 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 Snake River Ab Eagle Rock near Idaho Falls, ID?
The gauge sits at 43.60472, -112.05861, in Idaho, in hydrologic subbasin 17040201, draining roughly 9,533 square miles.
Can I use Snake River Ab Eagle Rock near Idaho Falls, 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 Snake River

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

Other gauges in this subbasin