Rivermatics

USGS Streamgage 13139510

Big Wood River at Hailey Id Total Flow

Big Wood River at Hailey Id Total Flow is USGS streamgage 13139510 in Idaho, monitoring river discharge in hydrologic subbasin 17040219. It sits on the Big Wood River, alongside 7 other gauges Rivermatics tracks on the same river. It drains a watershed of about 614 square miles. Discharge records at this site go back to 1915. Typical flow runs near 515.9 cfs in July and 435.2 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
614 sq mi
Subbasin (HUC-8)
17040219
Coordinates
43.51722, -114.32167
USGS site number
13139510
Records begin
1915-06-25 (111 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Big Wood River at Hailey Id Total Flow. 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
111 116 121
109 115 121
107 114 121
106 113 120
105 113 120
104 113 121
104 112 121
102 111 120
101 110 120
99.7 110 120
99.8 110 121
98.6 110 121
97.7 109 121
97.2 109 121

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 111 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 110.1 151.5 200.5
February 113 149.3 193.2
March 124.3 172.5 278.6
April 220.6 435.2 1,005.7
May 478.6 1,072.3 2,365.8
June 478.9 1,231.7 2,736
July 210.3 515.9 1,199.1
August 118.5 223.6 424.8
September 108.5 178 303.7
October 122.4 194.2 286.4
November 119.5 182 252.2
December 108 153.7 208.5

All values in cubic feet per second (cfs).

Common questions

When does Big Wood River at Hailey Id Total Flow normally run highest?
June, on the long-term record. The median daily flow that month is about 1,231.7 cfs, against 149.3 cfs in February, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Big Wood River at Hailey Id Total Flow?
It depends on the month. In January, half of days historically fall near 151.5 cfs, with the middle 80% of days between 110.1 and 200.5 cfs. The month-by-month table on this page gives the full range.
How long has Big Wood River at Hailey Id Total Flow been measured?
Discharge records at USGS site 13139510 begin in 1915, about 111 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 Big Wood River at Hailey Id Total Flow?
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 Big Wood River at Hailey Id Total Flow?
The gauge sits at 43.51722, -114.32167, in Idaho, in hydrologic subbasin 17040219, draining roughly 614 square miles.
Can I use Big Wood River at Hailey Id Total Flow 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 Big Wood River

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

Other gauges in this subbasin