USGS Streamgage 06154100
Milk River near Harlem, MT
Milk River near Harlem, MT is USGS streamgage 06154100 in Montana, monitoring river discharge in hydrologic subbasin 10050004. It sits on the Milk River, alongside 8 other gauges Rivermatics tracks on the same river. It drains a watershed of about 9,652 square miles. Discharge records at this site go back to 1952. Typical flow runs near 508.3 cfs in July and 286.9 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
- 9,652 sq mi
- Gauge elevation
- 2,330 ft
- Subbasin (HUC-8)
- 10050004
- Coordinates
- 48.48964, -108.75895
- USGS site number
- 06154100
- Records begin
- 1952-04-01 (74 years)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Milk River near Harlem, 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 |
|---|---|---|---|---|
| 156 | 182 | 200 | ||
| 149 | 179 | 211 | ||
| 141 | 178 | 224 | ||
| 135 | 177 | 235 | ||
| 133 | 177 | 234 | ||
| 128 | 176 | 250 | ||
| 123 | 174 | 249 | ||
| 114 | 170 | 251 | ||
| 102 | 164 | 245 | ||
| 113 | 174 | 269 | ||
| 107 | 171 | 263 | ||
| 96.4 | 164 | 258 | ||
| 95.6 | 165 | 259 | ||
| 87.4 | 159 | 251 |
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 65 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 | 25.3 | 64.8 | 120.1 | |
| February | 27 | 81.3 | 142 | |
| March | 56.5 | 142.3 | 1,185.2 | |
| April | 57.6 | 286.9 | 1,755.7 | |
| May | 286.5 | 548.6 | 1,174.6 | |
| June | 298.8 | 515.3 | 1,172 | |
| July | 280.8 | 508.3 | 822.1 | |
| August | 111.5 | 414.4 | 609.6 | |
| September | 53.3 | 272.4 | 530.7 | |
| October | 48.5 | 111.4 | 399.2 | |
| November | 30.1 | 73.8 | 198.1 | |
| December | 26.1 | 60 | 138.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Milk River near Harlem, MT normally run highest?
- May, on the long-term record. The median daily flow that month is about 548.6 cfs, against 60 cfs in December, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Milk River near Harlem, MT?
- It depends on the month. In January, half of days historically fall near 64.8 cfs, with the middle 80% of days between 25.3 and 120.1 cfs. The month-by-month table on this page gives the full range.
- How long has Milk River near Harlem, MT been measured?
- Discharge records at USGS site 06154100 begin in 1952, about 74 years, covering roughly 6,165 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Milk River near Harlem, 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 Milk River near Harlem, MT?
- The gauge sits at 48.48964, -108.75895, in Montana, in hydrologic subbasin 10050004, at an elevation of about 2,330 feet, draining roughly 9,652 square miles.
- Can I use Milk River near Harlem, 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 Milk River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Milk River in full.
- Milk River at Eastern Crossing of Int Bndry 2,452 sq mi
- Milk River at Havre, MT 5,655 sq mi
- Milk River at Merrill Rd, near Harlem, MT 8,925 sq mi
- Milk River near Harlem, MT this page
- Milk River near Dodson, MT 11,134 sq mi
- Milk River at Malta, MT 11,654 sq mi
- Milk River at Juneberg Bridge near Saco, MT 17,691 sq mi
- Milk River at Tampico, MT 21,341 sq mi
- Milk River at Nashua, MT 22,452 sq mi