Rivermatics

USGS Streamgage 06307662

Tongue River at Ashland, MT

Tongue River at Ashland, MT is USGS streamgage 06307662 in Montana, monitoring river discharge in hydrologic subbasin 10090102. It sits on the Tongue River, alongside 5 other gauges Rivermatics tracks on the same river. It drains a watershed of about 2,900 square miles. Discharge records at this site go back to 2021. Typical flow runs near 520 cfs in July and 161.9 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
Montana
Drainage area
2,900 sq mi
Gauge elevation
2,902 ft
Subbasin (HUC-8)
10090102
Coordinates
45.59775, -106.27494
USGS site number
06307662
Records begin
2021-09-28 (5 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Tongue River at Ashland, 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
93.7 101 106
90.9 100 105
87 98.6 106
85.2 98.5 108
82.5 98.3 109
80.3 98 112
80.9 99.1 116
77.5 98.9 123
74.1 98.2 125
70 97.5 126
66.2 96.7 128
62.7 96.1 133
59.2 95.4 138
55 94.4 135

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 5 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 — 129.5 —
February — 136.5 —
March — 134.4 —
April — 161.9 —
May — 793.9 —
June — 1,675.1 —
July — 520 —
August — 364.9 —
September — 306 —
October — 203.6 —
November — 182.2 —
December — 141.3 —

All values in cubic feet per second (cfs).

Common questions

When does Tongue River at Ashland, MT normally run highest?
June, on the long-term record. The median daily flow that month is about 1,675.1 cfs, against 129.5 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
How long has Tongue River at Ashland, MT been measured?
Discharge records at USGS site 06307662 begin in 2021, about 5 years, covering roughly 1,772 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Tongue River at Ashland, 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. 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 Tongue River at Ashland, MT?
The gauge sits at 45.59775, -106.27494, in Montana, in hydrologic subbasin 10090102, at an elevation of about 2,902 feet, draining roughly 2,900 square miles.
Can I use Tongue River at Ashland, 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 Tongue River

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

Other gauges in this subbasin