Rivermatics

USGS Streamgage 13304700

Lemhi River near McFarland, ID

Lemhi River near McFarland, ID is USGS streamgage 13304700 in Idaho, monitoring river discharge in hydrologic subbasin 17060204. It sits on the Lemhi River, alongside 2 other gauges Rivermatics tracks on the same river. Discharge records at this site go back to 2022. Typical flow runs near 78.6 cfs in July and 186.5 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)
17060204
Coordinates
44.80257, -113.56588
USGS site number
13304700
Records begin
2022-08-10 (4 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Lemhi River near McFarland, 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
66.9 68.5 71.2
65.8 68.5 72.2
64.6 68.6 73.7
63.3 68.5 74.9
61.5 67.9 74.7
61.6 68.9 78.4
61.5 69.3 79
61.1 69.6 80
59.7 69.1 80.1
58.3 68.5 79.8
57.2 68.2 80.1
56.4 68.1 80.7
55.7 67.8 81.1
55 67.5 81.5

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 3 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 — 140.2 —
February — 156.7 —
March — 169.3 —
April — 186.5 —
May — 142.8 —
June — 129.4 —
July — 78.6 —
August — 63.9 —
September — 68.4 —
October — 95.9 —
November — 130.5 —
December — 126.7 —

All values in cubic feet per second (cfs).

Common questions

When does Lemhi River near McFarland, ID normally run highest?
April, on the long-term record. The median daily flow that month is about 186.5 cfs, against 63.9 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
How long has Lemhi River near McFarland, ID been measured?
Discharge records at USGS site 13304700 begin in 2022, about 4 years, covering roughly 1,458 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Lemhi River near McFarland, 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 Lemhi River near McFarland, ID?
The gauge sits at 44.80257, -113.56588, in Idaho, in hydrologic subbasin 17060204.
Can I use Lemhi River near McFarland, 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 Lemhi River

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

Other gauges in this subbasin