USGS Streamgage 06102050
Marias River near Loma, MT
Marias River near Loma, MT is USGS streamgage 06102050 in Montana, monitoring river discharge in hydrologic subbasin 10030203. It sits on the Marias River, alongside 3 other gauges Rivermatics tracks on the same river. It drains a watershed of about 7,027 square miles. Discharge records at this site go back to 1959. Typical flow runs near 695.7 cfs in July and 551.9 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, alongside daily high and low water-temperature forecasts.
View live conditions & forecast →
Gauge details
- State
- Montana
- Drainage area
- 7,027 sq mi
- Gauge elevation
- 2,574 ft
- Subbasin (HUC-8)
- 10030203
- Coordinates
- 47.9459, -110.58084
- USGS site number
- 06102050
- Records begin
- 1959-10-01 (67 years)
- Rivermatics forecast
- 14-day flow outlook + water temperature
14-day flow forecast
Based on observations through for Marias River near Loma, 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 |
|---|---|---|---|---|
| 493 | 536 | 568 | ||
| 483 | 539 | 590 | ||
| 476 | 536 | 608 | ||
| 466 | 531 | 632 | ||
| 457 | 528 | 654 | ||
| 437 | 531 | 665 | ||
| 433 | 524 | 680 | ||
| 431 | 524 | 693 | ||
| 435 | 526 | 719 | ||
| 416 | 522 | 716 | ||
| 412 | 522 | 720 | ||
| 408 | 522 | 726 | ||
| 406 | 522 | 723 | ||
| 421 | 526 | 740 |
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 67 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 | 102.3 | 294.5 | 551.8 | |
| February | 131 | 333.4 | 969.9 | |
| March | 132.2 | 391.9 | 1,485.8 | |
| April | 304.6 | 551.9 | 1,387.7 | |
| May | 411.4 | 798.1 | 2,103.5 | |
| June | 413.4 | 1,003.1 | 3,079.7 | |
| July | 328.3 | 695.7 | 2,136.1 | |
| August | 289.3 | 619.6 | 2,041.3 | |
| September | 351 | 569.1 | 1,554 | |
| October | 298.5 | 514.9 | 1,218.1 | |
| November | 116.2 | 538.4 | 1,465 | |
| December | 92.3 | 397.5 | 848.3 |
All values in cubic feet per second (cfs).
Common questions
- When does Marias River near Loma, MT normally run highest?
- June, on the long-term record. The median daily flow that month is about 1,003.1 cfs, against 294.5 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Marias River near Loma, MT?
- It depends on the month. In January, half of days historically fall near 294.5 cfs, with the middle 80% of days between 102.3 and 551.8 cfs. The month-by-month table on this page gives the full range.
- How long has Marias River near Loma, MT been measured?
- Discharge records at USGS site 06102050 begin in 1959, about 67 years, covering roughly 5,390 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Marias River near Loma, 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 Marias River near Loma, MT?
- The gauge sits at 47.9459, -110.58084, in Montana, in hydrologic subbasin 10030203, at an elevation of about 2,574 feet, draining roughly 7,027 square miles.
- Can I use Marias River near Loma, 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 Marias River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Marias River in full.
- Marias River near Shelby, MT 2,716 sq mi
- Marias River near Chester, MT 4,944 sq mi
- Marias River at Highway 223 bridge near Chester, MT 5,947 sq mi
- Marias River near Loma, MT this page