USGS Streamgage 06185500
Missouri River near Culbertson, MT
Missouri River near Culbertson, MT is USGS streamgage 06185500 in Montana, monitoring river discharge in hydrologic subbasin 10060005. It drains a watershed of about 89,858 square miles. Discharge records at this site go back to 1941. Typical flow runs near 9,180.3 cfs in July and 8,041 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 89,858 sq mi
- Gauge elevation
- 1,887 ft
- Subbasin (HUC-8)
- 10060005
- Coordinates
- 48.1235, -104.4733
- USGS site number
- 06185500
- Records begin
- 1941-07-01 (85 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 68 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 | 6,228.4 | 10,709.7 | 14,006.5 | |
| February | 6,300.7 | 11,241.4 | 15,217.2 | |
| March | 5,554.8 | 9,346.5 | 16,554.8 | |
| April | 5,474 | 8,041 | 18,616.7 | |
| May | 5,730.3 | 8,809.7 | 16,638.7 | |
| June | 6,597.3 | 9,446 | 17,253.3 | |
| July | 6,647.7 | 9,180.3 | 15,945.2 | |
| August | 6,373.5 | 8,914.5 | 14,945.2 | |
| September | 5,374.7 | 8,117.3 | 14,923.3 | |
| October | 4,352.6 | 6,933.2 | 14,138.7 | |
| November | 4,229.3 | 7,315.3 | 13,876.7 | |
| December | 5,885.2 | 9,581 | 12,412.9 |
All values in cubic feet per second (cfs).