A 4,797 km² sub-basin of the Missouri region in SD. Drought coverage is from the US Drought Monitor (map of 2026-10-13); streamflow classes place each USGS gauge's latest reading against its own day-of-year record.
| Date | DSCI | D2+ % | Gauges low | Flow pct |
|---|---|---|---|---|
| 2026-10-21 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-20 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-19 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-18 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-17 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-16 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-15 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-14 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-13 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-12 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-11 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-10 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-09 | 207 | 6.67 | 1/1 | p10 |
| 2026-10-08 | 207 | 6.67 | 1/1 | p10 |