COLUMBIA--BLO ROCK ISLAND DAM (RISW1)
| Observed | Forecast/Trend Issued: 2026-04-10 16:28 PDT | ||
| Date/Time (PDT) | Inflow | Date/Time (PDT) | Inflow |
| 2026-04-11 00:00 | 128010 | 2026-04-11 11:00 | 128967.1 |
| 2026-04-10 00:00 | 105880 | 2026-04-11 17:00 | 129501.69 |
| 2026-04-09 00:00 | 112560 | 2026-04-11 23:00 | 130291.28 |
| 2026-04-08 00:00 | 99820 | 2026-04-12 05:00 | 131174.82 |
| 2026-04-07 00:00 | 119230 | 2026-04-12 11:00 | 131975.89 |
| 2026-04-06 00:00 | 118820 | 2026-04-12 17:00 | 132595.44 |
| 2026-04-05 00:00 | 119370 | 2026-04-12 23:00 | 133068.48 |
| 2026-04-04 00:00 | 122950 | 2026-04-13 05:00 | 133492.36 |
| 2026-04-03 00:00 | 117210 | 2026-04-13 11:00 | 133963.55 |
| 2026-04-02 00:00 | 124050 | 2026-04-13 17:00 | 134481.29 |
| 2026-04-01 00:00 | 144130 | 2026-04-13 23:00 | 134983.76 |
| 2026-04-14 05:00 | 135422.68 | ||
| 2026-04-14 11:00 | 135783.83 | ||
| 2026-04-14 17:00 | 136064.64 | ||
| 2026-04-14 23:00 | 136286.9 | ||
| 2026-04-15 05:00 | 136530.18 | ||
| 2026-04-15 11:00 | 136822.31 | ||
| 2026-04-15 17:00 | 137058.96 | ||
| 2026-04-15 23:00 | 137168.2 | ||
| 2026-04-16 05:00 | 137145.92 | ||
| 2026-04-16 11:00 | 137050.96 | ||
| 2026-04-16 17:00 | 136914.58 | ||
| 2026-04-16 23:00 | 136758.9 | ||
| 2026-04-17 05:00 | 136603.67 | ||
| 2026-04-17 11:00 | 136464.31 | ||
| 2026-04-17 17:00 | 136345.26 | ||
| 2026-04-17 23:00 | 136251.88 | ||
| 2026-04-18 05:00 | 136186.43 | ||
| 2026-04-18 11:00 | 136144.73 | ||
| 2026-04-18 17:00 | 136120.5 | ||
| 2026-04-18 23:00 | 136110.61 | ||
| 2026-04-19 05:00 | 136114.56 | ||
| 2026-04-19 11:00 | 136131.13 | ||
| 2026-04-19 17:00 | 136157.47 | ||
| 2026-04-19 23:00 | 136194.66 | ||
| 2026-04-20 05:00 | 136243.01 | ||