Rivermatics

USGS Streamgage 06054500

Missouri River at Toston, MT

Missouri River at Toston, MT is USGS streamgage 06054500 in Montana, monitoring river discharge in hydrologic subbasin 10030101. It sits on the Missouri River, alongside 51 other gauges Rivermatics tracks on the same river. It drains a watershed of about 14,641 square miles. Discharge records at this site go back to 1890. Typical flow runs near 4,345.2 cfs in July and 5,139 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
14,641 sq mi
Gauge elevation
3,908 ft
Subbasin (HUC-8)
10030101
Coordinates
46.14657, -111.42028
USGS site number
06054500
Records begin
1890-04-01 (136 years)
Rivermatics forecast
14-day flow outlook + water temperature

14-day flow forecast

Based on observations through for Missouri River at Toston, 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
1,659 1,720 1,783
1,610 1,694 1,791
1,573 1,677 1,812
1,537 1,656 1,832
1,502 1,637 1,883
1,480 1,632 1,935
1,458 1,632 2,049
1,440 1,638 2,165
1,421 1,638 2,246
1,402 1,640 2,351
1,382 1,643 2,534
1,370 1,653 2,744
1,359 1,660 2,880
1,347 1,663 2,981

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 136 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 2,338.7 3,330.6 4,403.5
February 2,621.7 3,591.4 4,601
March 3,023.5 3,848.4 5,302.6
April 3,329.3 5,139 8,134.7
May 3,870.6 7,977.1 14,507.7
June 4,635 11,186.7 20,706.7
July 1,707.4 4,345.2 8,911.3
August 1,304.8 2,263.5 4,274.5
September 1,768.7 3,081 4,854
October 2,811.3 4,011.3 5,719.4
November 3,233.7 4,344.7 5,912
December 2,533.5 3,624.8 4,714.5

All values in cubic feet per second (cfs).

Common questions

When does Missouri River at Toston, MT normally run highest?
June, on the long-term record. The median daily flow that month is about 11,186.7 cfs, against 2,263.5 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Missouri River at Toston, MT?
It depends on the month. In January, half of days historically fall near 3,330.6 cfs, with the middle 80% of days between 2,338.7 and 4,403.5 cfs. The month-by-month table on this page gives the full range.
How long has Missouri River at Toston, MT been measured?
Discharge records at USGS site 06054500 begin in 1890, about 136 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 Missouri River at Toston, 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 Missouri River at Toston, MT?
The gauge sits at 46.14657, -111.42028, in Montana, in hydrologic subbasin 10030101, at an elevation of about 3,908 feet, draining roughly 14,641 square miles.
Can I use Missouri River at Toston, 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 Missouri River

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

Other gauges in this subbasin