COLUMBIA--BLO ROCK ISLAND DAM (RISW1)
| Observed | Forecast/Trend Issued: 2026-05-14 16:51 PDT | ||
| Date/Time (PDT) | Inflow | Date/Time (PDT) | Inflow |
| 2026-05-14 00:00 | 133900 | 2026-05-14 23:00 | 154682.39 |
| 2026-05-13 00:00 | 145910 | 2026-05-15 05:00 | 161516.45 |
| 2026-05-12 00:00 | 152510 | 2026-05-15 11:00 | 163367.84 |
| 2026-05-11 00:00 | 131320 | 2026-05-15 17:00 | 163415.76 |
| 2026-05-10 00:00 | 166580 | 2026-05-15 23:00 | 163216.83 |
| 2026-05-09 00:00 | 119980 | 2026-05-16 05:00 | 162943.33 |
| 2026-05-08 00:00 | 138120 | 2026-05-16 11:00 | 162631.94 |
| 2026-05-07 00:00 | 129650 | 2026-05-16 17:00 | 162262.5 |
| 2026-05-06 00:00 | 170980 | 2026-05-16 23:00 | 161860.12 |
| 2026-05-05 00:00 | 157800 | 2026-05-17 05:00 | 161399.34 |
| 2026-05-04 00:00 | 155460 | 2026-05-17 11:00 | 160865.86 |
| 2026-05-17 17:00 | 160287.77 | ||
| 2026-05-17 23:00 | 159691.24 | ||
| 2026-05-18 05:00 | 159092.06 | ||
| 2026-05-18 11:00 | 158503.56 | ||
| 2026-05-18 17:00 | 157936.65 | ||
| 2026-05-18 23:00 | 157399.58 | ||
| 2026-05-19 05:00 | 156917.24 | ||
| 2026-05-19 11:00 | 156512.82 | ||
| 2026-05-19 17:00 | 156160.22 | ||
| 2026-05-19 23:00 | 155845.98 | ||
| 2026-05-20 05:00 | 155614.15 | ||
| 2026-05-20 11:00 | 155459.95 | ||
| 2026-05-20 17:00 | 155342.38 | ||
| 2026-05-20 23:00 | 155289.7 | ||
| 2026-05-21 05:00 | 155362.23 | ||
| 2026-05-21 11:00 | 155508.44 | ||
| 2026-05-21 17:00 | 155645.31 | ||
| 2026-05-21 23:00 | 155795.12 | ||
| 2026-05-22 05:00 | 155990.66 | ||
| 2026-05-22 11:00 | 156187.96 | ||
| 2026-05-22 17:00 | 156330.72 | ||
| 2026-05-22 23:00 | 156522.69 | ||
| 2026-05-23 05:00 | 156892.87 | ||
| 2026-05-23 11:00 | 157363.78 | ||
| 2026-05-23 17:00 | 157820.22 | ||
| 2026-05-23 23:00 | 158278.2 | ||
| 2026-05-24 05:00 | 158781.54 | ||