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 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.
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)
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).