USGS Streamgage 06076690
Smith River near Ft Logan, MT
Smith River near Ft Logan, MT is USGS streamgage 06076690 in Montana, monitoring river discharge in hydrologic subbasin 10030103. It sits on the Smith River, alongside 2 other gauges Rivermatics tracks on the same river. It drains a watershed of about 845 square miles. Discharge records at this site go back to 1977. Typical flow runs near 135.5 cfs in July and 139.2 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
- Montana
- Drainage area
- 845 sq mi
- Gauge elevation
- 4,391 ft
- Subbasin (HUC-8)
- 10030103
- Coordinates
- 46.7958, -111.17856
- USGS site number
- 06076690
- Records begin
- 1977-10-01 (49 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Smith River near Ft Logan, 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.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 55.7 | 63.9 | 76.7 | ||
| 54 | 65.9 | 84 | ||
| 51.7 | 63.6 | 81.1 | ||
| 49.3 | 61.3 | 78.5 | ||
| 48.7 | 61.2 | 78.8 | ||
| 46.4 | 58.5 | 75.1 | ||
| 46.4 | 59 | 76 | ||
| 45.1 | 58.1 | 76 | ||
| 45.8 | 60.4 | 81.3 | ||
| 44.8 | 59.6 | 80.9 | ||
| 43.2 | 57.7 | 79 | ||
| 42.9 | 58.2 | 81.3 | ||
| 43.3 | 59.8 | 85.8 | ||
| 42.5 | 58.9 | 84.5 |
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 49 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 46.7 | 78.2 | 126.5 | |
| February | 46.9 | 90 | 154.2 | |
| March | 71.3 | 120.3 | 248.2 | |
| April | 83.7 | 139.2 | 340.1 | |
| May | 94.5 | 229.5 | 615.4 | |
| June | 75.4 | 256.8 | 768.1 | |
| July | 42 | 135.5 | 371.2 | |
| August | 30.7 | 66.8 | 124.9 | |
| September | 46.6 | 85.3 | 162.8 | |
| October | 67.2 | 103.3 | 155.4 | |
| November | 55.2 | 95.2 | 144.2 | |
| December | 46.3 | 81 | 136 |
All values in cubic feet per second (cfs).
Common questions
- When does Smith River near Ft Logan, MT normally run highest?
- June, on the long-term record. The median daily flow that month is about 256.8 cfs, against 66.8 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 Smith River near Ft Logan, MT?
- It depends on the month. In January, half of days historically fall near 78.2 cfs, with the middle 80% of days between 46.7 and 126.5 cfs. The month-by-month table on this page gives the full range.
- How long has Smith River near Ft Logan, MT been measured?
- Discharge records at USGS site 06076690 begin in 1977, about 49 years, covering roughly 5,663 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Smith River near Ft Logan, 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 Smith River near Ft Logan, MT?
- The gauge sits at 46.7958, -111.17856, in Montana, in hydrologic subbasin 10030103, at an elevation of about 4,391 feet, draining roughly 845 square miles.
- Can I use Smith River near Ft Logan, 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 Smith River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Smith River in full.
- Smith River near Ft Logan, MT this page
- Smith River below Eagle Creek near Fort Logan, MT 1,087 sq mi
- Smith River near Eden, MT 1,588 sq mi