USGS Streamgage 06090300
Missouri River near Great Falls, MT
Missouri River near Great Falls, MT is USGS streamgage 06090300 in Montana, monitoring river discharge in hydrologic subbasin 10030102. It sits on the Missouri River, alongside 51 other gauges Rivermatics tracks on the same river. It drains a watershed of about 22,881 square miles. Discharge records at this site go back to 1952. Typical flow runs near 6,907.4 cfs in July and 6,910.7 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
- 22,881 sq mi
- Gauge elevation
- 2,818 ft
- Subbasin (HUC-8)
- 10030102
- Coordinates
- 47.58444, -111.06058
- USGS site number
- 06090300
- Records begin
- 1952-05-04 (74 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Missouri River near Great Falls, 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 |
|---|---|---|---|---|
| 3,802 | 3,907 | 4,021 | ||
| 3,716 | 3,891 | 4,099 | ||
| 3,653 | 3,866 | 4,131 | ||
| 3,588 | 3,827 | 4,117 | ||
| 3,531 | 3,796 | 4,115 | ||
| 3,483 | 3,774 | 4,111 | ||
| 3,443 | 3,758 | 4,104 | ||
| 3,426 | 3,763 | 4,172 | ||
| 3,399 | 3,753 | 4,198 | ||
| 3,368 | 3,740 | 4,204 | ||
| 3,344 | 3,728 | 4,208 | ||
| 3,313 | 3,709 | 4,179 | ||
| 3,298 | 3,707 | 4,220 | ||
| 3,272 | 3,691 | 4,196 |
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 70 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 | 4,155.5 | 5,852.3 | 7,784.2 | |
| February | 4,284.5 | 6,000.7 | 8,094.5 | |
| March | 4,282.9 | 6,054.8 | 9,034.2 | |
| April | 4,361 | 6,910.7 | 10,563 | |
| May | 5,179 | 9,757.1 | 17,396.8 | |
| June | 5,245.3 | 11,061.3 | 23,490 | |
| July | 4,275.5 | 6,907.4 | 14,194.8 | |
| August | 4,041.3 | 5,376.8 | 7,812.9 | |
| September | 3,807 | 5,124.3 | 7,393.3 | |
| October | 3,956.5 | 5,253.2 | 7,721 | |
| November | 4,109 | 5,470 | 7,880 | |
| December | 3,959.7 | 5,730 | 7,450.3 |
All values in cubic feet per second (cfs).
Common questions
- When does Missouri River near Great Falls, MT normally run highest?
- June, on the long-term record. The median daily flow that month is about 11,061.3 cfs, against 5,124.3 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 Missouri River near Great Falls, MT?
- It depends on the month. In January, half of days historically fall near 5,852.3 cfs, with the middle 80% of days between 4,155.5 and 7,784.2 cfs. The month-by-month table on this page gives the full range.
- How long has Missouri River near Great Falls, MT been measured?
- Discharge records at USGS site 06090300 begin in 1952, about 74 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 near Great Falls, 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 Missouri River near Great Falls, MT?
- The gauge sits at 47.58444, -111.06058, in Montana, in hydrologic subbasin 10030102, at an elevation of about 2,818 feet, draining roughly 22,881 square miles.
- Can I use Missouri River near Great Falls, 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.
- Missouri River at Toston, MT 14,641 sq mi
- Missouri River below Hauser Dam near Helena, MT 16,669 sq mi
- Missouri River below Holter Dam near Wolf Creek, MT 16,924 sq mi
- Missouri River at Cascade, MT 18,173 sq mi
- Missouri River near Ulm, MT 20,605 sq mi
- Missouri River near Great Falls, MT this page
- Missouri River at Fort Benton, MT 24,297 sq mi
- Missouri River at Virgelle, MT 34,000 sq mi
- Missouri River near Landusky, MT 40,649 sq mi
- Missouri River near Wolf Point, MT 80,650 sq mi
- Missouri River near Culbertson, MT 89,858 sq mi
- Missouri River near Williston, ND 164,500 sq mi
- Missouri River above Stanton, ND 181,400 sq mi
- Missouri River near Stanton, ND 182,000 sq mi
- Missouri River near Hensler, ND 183,000 sq mi
- Missouri River at Washburn, ND 184,000 sq mi
- Missouri River at Price, ND 185,000 sq mi
- Missouri River at Bismarck, ND 186,400 sq mi
- Missouri River near Schmidt, ND 191,700 sq mi
- Missouri River at Pierre, SD 243,500 sq mi
- Missouri River at Laframboise Island at Pierre, SD 246,607 sq mi
- Missouri River at Farm Island near Pierre, SD 246,607 sq mi
- Missouri River at Niobrara, Nebr. 265,500 sq mi
- Missouri River at Yankton, SD 279,500 sq mi
- Missouri River at Sioux City, IA 314,600 sq mi
- Missouri River at Decatur, NE 316,200 sq mi
- Missouri River at Omaha, NE 322,800 sq mi
- Missouri River at Nebraska City, NE 410,000 sq mi
- Missouri River at Rulo, NE 414,900 sq mi
- Missouri River at St. Joseph, MO 426,500 sq mi
- Missouri River at Atchison, KS 426,865 sq mi
- Missouri River at Kansas City, MO 484,100 sq mi
- Missouri River at Napoleon, MO 485,100 sq mi
- Missouri River at Waverly, MO 485,900 sq mi
- Missouri River at Glasgow, MO 498,900 sq mi
- Missouri River at Boonville, MO 500,700 sq mi
- Missouri River at Jefferson City, MO 507,500 sq mi
- Missouri River at Hermann, MO 522,500 sq mi
- Missouri River at Washington, MO 523,200 sq mi
- Missouri River near Labadie, MO 523,300 sq mi
- Missouri River at St. Charles, MO 524,000 sq mi
- Missouri River above Parkville, MO
- Missouri River at Brownville, NE
- Missouri River at E Frazer Pump Plant near Frazer, MT
- Missouri River at Hwy 370 at Bellevue, Nebr.
- Missouri River at Hwy 92 at Omaha, Nebr.
- Missouri River at Randolph, MO
- Missouri River at W Frazer Pump Plant near Frazer, MT
- Missouri River below Greenwood, SD
- Missouri River below Ponca Creek near Verdel, Nebr.
- Missouri River near Gayville, SD
- Missouri River near Maskell, Nebr.