USGS Streamgage 06185110
Big Muddy Creek near mouth near Culbertson, MT
Big Muddy Creek near mouth near Culbertson, MT is USGS streamgage 06185110 in Montana, monitoring river discharge in hydrologic subbasin 10060006. It sits on the Big Muddy Creek, alongside 1 other gauge Rivermatics tracks on the same river. It drains a watershed of about 2,717 square miles. Discharge records at this site go back to 1981. Typical flow runs near 9.8 cfs in July and 31.8 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
- 2,717 sq mi
- Gauge elevation
- 1,902 ft
- Subbasin (HUC-8)
- 10060006
- Coordinates
- 48.16448, -104.62952
- USGS site number
- 06185110
- Records begin
- 1981-10-01 (45 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Big Muddy Creek near mouth near Culbertson, 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 |
|---|---|---|---|---|
| 0.7 | 1.1 | 1.6 | ||
| 0.5 | 1 | 2 | ||
| 0.4 | 1 | 2.5 | ||
| 0.3 | 1 | 3.4 | ||
| 0.2 | 1 | 3.6 | ||
| 0.2 | 1 | 4 | ||
| 0.1 | 1 | 4.4 | ||
| 0 | 0.9 | 4.6 | ||
| 0 | 0.8 | 4.7 | ||
| 0 | 0.8 | 4.8 | ||
| 0 | 0.8 | 4.8 | ||
| 0 | 0.7 | 4.6 | ||
| 0 | 0.7 | 4.3 | ||
| 0 | 0.7 | 4.3 |
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 44 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 | 0 | 1.2 | 9.6 | |
| February | 0 | 2.4 | 17.6 | |
| March | 0.5 | 13.9 | 428.3 | |
| April | 3.3 | 31.8 | 502.7 | |
| May | 0.7 | 28 | 241.4 | |
| June | 0.1 | 11.2 | 195.5 | |
| July | 0 | 9.8 | 122.3 | |
| August | 0 | 2.7 | 73.7 | |
| September | 0 | 1.2 | 80.3 | |
| October | 0 | 4.6 | 70.2 | |
| November | 0 | 5.7 | 27.8 | |
| December | 0 | 3.3 | 17 |
All values in cubic feet per second (cfs).
Common questions
- When does Big Muddy Creek near mouth near Culbertson, MT normally run highest?
- April, on the long-term record. The median daily flow that month is about 31.8 cfs, against 1.2 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 Big Muddy Creek near mouth near Culbertson, MT?
- It depends on the month. In January, half of days historically fall near 1.2 cfs, with the middle 80% of days between 0 and 9.6 cfs. The month-by-month table on this page gives the full range.
- How long has Big Muddy Creek near mouth near Culbertson, MT been measured?
- Discharge records at USGS site 06185110 begin in 1981, about 45 years, covering roughly 5,172 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Big Muddy Creek near mouth near Culbertson, 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 Big Muddy Creek near mouth near Culbertson, MT?
- The gauge sits at 48.16448, -104.62952, in Montana, in hydrologic subbasin 10060006, at an elevation of about 1,902 feet, draining roughly 2,717 square miles.
- Can I use Big Muddy Creek near mouth near Culbertson, 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 Big Muddy Creek
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Big Muddy Creek in full.
- Big Muddy Creek near Antelope, MT 955 sq mi
- Big Muddy Creek near mouth near Culbertson, MT this page