Rivermatics

USGS Streamgage 13132373

Big Lost River at Arco at Sunset Road, ID

Big Lost River at Arco at Sunset Road, ID is USGS streamgage 13132373 in Idaho, monitoring river discharge in hydrologic subbasin 17040218. It sits on the Big Lost River, alongside 8 other gauges Rivermatics tracks on the same river. It drains a watershed of about 1,348 square miles. Discharge records at this site go back to 2019. Typical flow runs near 0 cfs in July and 0 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
1,348 sq mi
Subbasin (HUC-8)
17040218
Coordinates
43.63819, -113.3265
USGS site number
13132373
Records begin
2019-03-25 (7 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Big Lost River at Arco at Sunset Road, 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 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 0

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 8 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 —
February — 1 —
March — 0 —
April — 0 —
May — 1.7 —
June — 0.4 —
July — 0 —
August — 0 —
September — 0 —
October — 0 —
November — 0 —
December — 0 —

All values in cubic feet per second (cfs).

Common questions

When does Big Lost River at Arco at Sunset Road, ID normally run highest?
May, on the long-term record. The median daily flow that month is about 1.7 cfs, against 0 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
How long has Big Lost River at Arco at Sunset Road, ID been measured?
Discharge records at USGS site 13132373 begin in 2019, about 7 years, covering roughly 2,692 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 Lost River at Arco at Sunset Road, 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 Big Lost River at Arco at Sunset Road, ID?
The gauge sits at 43.63819, -113.3265, in Idaho, in hydrologic subbasin 17040218, draining roughly 1,348 square miles.
Can I use Big Lost River at Arco at Sunset Road, 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 Big Lost River

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

Other gauges in this subbasin