USGS Streamgage 06921590
South Grand River at Archie, MO
South Grand River at Archie, MO is USGS streamgage 06921590, monitoring river discharge in hydrologic subbasin 10290108. It drains a watershed of about 356 square miles. Discharge records at this site go back to 1969. Typical flow runs near 19.9 cfs in July and 140.6 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 356 sq mi
- Gauge elevation
- 805 ft
- Subbasin (HUC-8)
- 10290108
- Coordinates
- 38.49158, -94.34424
- USGS site number
- 06921590
- Records begin
- 1969-10-01 (57 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 57 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 | 4.9 | 43.9 | 509.5 | |
| February | 10.2 | 75.8 | 557.3 | |
| March | 20.4 | 129.4 | 1,264.4 | |
| April | 24.2 | 140.6 | 1,313.8 | |
| May | 20.5 | 130.3 | 1,850.2 | |
| June | 9.8 | 66.9 | 1,619.1 | |
| July | 1.1 | 19.9 | 512.2 | |
| August | 0.3 | 9.3 | 135.1 | |
| September | 0.4 | 8.4 | 480.6 | |
| October | 0.9 | 11.8 | 625.9 | |
| November | 3 | 29 | 353.4 | |
| December | 4 | 36.4 | 379.7 |
All values in cubic feet per second (cfs).