Rivermatics

USGS Streamgage 06025500

Big Hole River near Melrose, MT

Big Hole River near Melrose, MT is USGS streamgage 06025500 in Montana, monitoring river discharge in hydrologic subbasin 10020004. It sits on the Big Hole River, alongside 6 other gauges Rivermatics tracks on the same river. It drains a watershed of about 2,472 square miles. Discharge records at this site go back to 1923. Typical flow runs near 1,081.6 cfs in July and 1,220.4 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, alongside daily high and low water-temperature forecasts.

View live conditions & forecast →

Gauge details

State
Montana
Drainage area
2,472 sq mi
Gauge elevation
5,037 ft
Subbasin (HUC-8)
10020004
Coordinates
45.52658, -112.70172
USGS site number
06025500
Records begin
1923-10-01 (103 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Big Hole River near Melrose, MT. 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
228 245 261
218 238 258
210 232 255
204 228 252
198 222 248
194 221 252
192 220 255
188 217 254
183 214 255
181 214 263
177 212 269
174 210 270
171 208 270
168 207 279

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 102 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 224.9 341.6 479.9
February 244.8 341.6 478.4
March 307.3 413.5 762
April 569.9 1,220.4 2,730
May 1,271.7 2,781.3 5,899.4
June 1,232.2 3,407.3 7,147.3
July 370.3 1,081.6 2,317.1
August 176.9 372.7 779.7
September 171.4 305.5 602.6
October 273.1 451.3 751.5
November 301.9 463.3 698.8
December 243.9 363.3 532.9

All values in cubic feet per second (cfs).

Common questions

When does Big Hole River near Melrose, MT normally run highest?
June, on the long-term record. The median daily flow that month is about 3,407.3 cfs, against 305.5 cfs in September, 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 Hole River near Melrose, MT?
It depends on the month. In January, half of days historically fall near 341.6 cfs, with the middle 80% of days between 224.9 and 479.9 cfs. The month-by-month table on this page gives the full range.
How long has Big Hole River near Melrose, MT been measured?
Discharge records at USGS site 06025500 begin in 1923, about 103 years, covering roughly 9,200 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 Hole River near Melrose, MT?
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. A companion model forecasts each day's water-temperature high and low. 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 Hole River near Melrose, MT?
The gauge sits at 45.52658, -112.70172, in Montana, in hydrologic subbasin 10020004, at an elevation of about 5,037 feet, draining roughly 2,472 square miles.
Can I use Big Hole River near Melrose, MT 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 Hole River

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

Other gauges in this subbasin