Rivermatics

USGS Streamgage 13138000

East Fork Big Wood River at Gimlet, ID

East Fork Big Wood River at Gimlet, ID is USGS streamgage 13138000 in Idaho, monitoring river discharge in hydrologic subbasin 17040219. It drains a watershed of about 86 square miles. Discharge records at this site go back to 2010. Typical flow runs near 42.7 cfs in July and 27.9 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.

View live conditions & forecast →

Gauge details

State
Idaho
Drainage area
86 sq mi
Subbasin (HUC-8)
17040219
Coordinates
43.60306, -114.33028
USGS site number
13138000
Records begin
2010-10-19 (16 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for East Fork Big Wood River at Gimlet, 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
6.1 6.8 7.2
5.8 6.6 7.2
5.6 6.4 7.1
5.4 6.3 7.1
5.3 6.2 7.1
5.3 6.3 7.5
5.3 6.5 7.9
5.2 6.4 7.9
5.1 6.2 7.6
4.9 6 7.4
4.7 5.9 7.3
4.5 5.7 7.2
4.3 5.5 7
4.2 5.4 7.1

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 16 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 5.7 10.2 16.2
February 6.2 10.4 16.4
March 6.8 14.3 28
April 12.9 27.9 86.1
May 33.4 90.5 270.9
June 61.9 136.8 451
July 15.4 42.7 212.7
August 5.1 13.3 56.5
September 3 10.6 30.3
October 5.7 14.8 34.2
November 6.3 14.2 27.9
December 4 11.1 19.8

All values in cubic feet per second (cfs).

Common questions

When does East Fork Big Wood River at Gimlet, ID normally run highest?
June, on the long-term record. The median daily flow that month is about 136.8 cfs, against 10.2 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 East Fork Big Wood River at Gimlet, ID?
It depends on the month. In January, half of days historically fall near 10.2 cfs, with the middle 80% of days between 5.7 and 16.2 cfs. The month-by-month table on this page gives the full range.
How long has East Fork Big Wood River at Gimlet, ID been measured?
Discharge records at USGS site 13138000 begin in 2010, about 16 years, covering roughly 5,770 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for East Fork Big Wood River at Gimlet, 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 East Fork Big Wood River at Gimlet, ID?
The gauge sits at 43.60306, -114.33028, in Idaho, in hydrologic subbasin 17040219, draining roughly 86 square miles.
Can I use East Fork Big Wood River at Gimlet, 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.

Other gauges in this subbasin