COLUMBIA--BLO ROCK ISLAND DAM (RISW1)
| Observed | Forecast/Trend Issued: 2026-05-08 15:21 PDT | ||
| Date/Time (PDT) | Inflow | Date/Time (PDT) | Inflow |
| 2026-05-09 00:00 | 119980 | 2026-05-09 05:00 | 173930.92 |
| 2026-05-08 00:00 | 138120 | 2026-05-09 11:00 | 174297.86 |
| 2026-05-07 00:00 | 129650 | 2026-05-09 17:00 | 173698.86 |
| 2026-05-06 00:00 | 170980 | 2026-05-09 23:00 | 173336.78 |
| 2026-05-05 00:00 | 157800 | 2026-05-10 05:00 | 173462.92 |
| 2026-05-04 00:00 | 155460 | 2026-05-10 11:00 | 172692.82 |
| 2026-05-03 00:00 | 161910 | 2026-05-10 17:00 | 170579.36 |
| 2026-05-02 00:00 | 169040 | 2026-05-10 23:00 | 168978.56 |
| 2026-05-01 00:00 | 148070 | 2026-05-11 05:00 | 168470.8 |
| 2026-04-30 00:00 | 164720 | 2026-05-11 11:00 | 168306.5 |
| 2026-04-29 00:00 | 129000 | 2026-05-11 17:00 | 168077.86 |
| 2026-05-11 23:00 | 167828.86 | ||
| 2026-05-12 05:00 | 167684.27 | ||
| 2026-05-12 11:00 | 167615.59 | ||
| 2026-05-12 17:00 | 167583.07 | ||
| 2026-05-12 23:00 | 167672.76 | ||
| 2026-05-13 05:00 | 167915.72 | ||
| 2026-05-13 11:00 | 168187.36 | ||
| 2026-05-13 17:00 | 168387.34 | ||
| 2026-05-13 23:00 | 168543.48 | ||
| 2026-05-14 05:00 | 168676.14 | ||
| 2026-05-14 11:00 | 168724.16 | ||
| 2026-05-14 17:00 | 168655.24 | ||
| 2026-05-14 23:00 | 168531.9 | ||
| 2026-05-15 05:00 | 168411.16 | ||
| 2026-05-15 11:00 | 168253.52 | ||
| 2026-05-15 17:00 | 168003.52 | ||
| 2026-05-15 23:00 | 167664.47 | ||
| 2026-05-16 05:00 | 167266.16 | ||
| 2026-05-16 11:00 | 166801.76 | ||
| 2026-05-16 17:00 | 166249.1 | ||
| 2026-05-16 23:00 | 165630.72 | ||
| 2026-05-17 05:00 | 164996.4 | ||
| 2026-05-17 11:00 | 164365.88 | ||
| 2026-05-17 17:00 | 163729.66 | ||
| 2026-05-17 23:00 | 163115.17 | ||
| 2026-05-18 05:00 | 162589.43 | ||