USGS Streamgage 06478690
West Fork Vermillion River near Parker, SD
West Fork Vermillion River near Parker, SD is USGS streamgage 06478690, monitoring river discharge in hydrologic subbasin 10170102. It drains a watershed of about 378 square miles. Discharge records at this site go back to 1961. Typical flow runs near 5.3 cfs in July and 21.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- Drainage area
- 378 sq mi
- Gauge elevation
- 1,353 ft
- Subbasin (HUC-8)
- 10170102
- Coordinates
- 43.41564, -97.20486
- USGS site number
- 06478690
- Records begin
- 1961-09-01 (65 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 | 0 | 0.6 | 6.7 | |
| February | 0 | 2 | 38.7 | |
| March | 0.3 | 15.4 | 402.9 | |
| April | 1.5 | 21.8 | 432 | |
| May | 0.2 | 12.6 | 222.2 | |
| June | 0.1 | 12.5 | 342.1 | |
| July | 0.1 | 5.3 | 121.4 | |
| August | 0 | 1.2 | 33.8 | |
| September | 0 | 0.6 | 17.6 | |
| October | 0 | 0.6 | 37.5 | |
| November | 0 | 0.9 | 23.6 | |
| December | 0 | 0.7 | 10.3 |
All values in cubic feet per second (cfs).