COLUMBIA--BLO ROCK ISLAND DAM (RISW1)
| Observed | Forecast/Trend Issued: 2026-05-19 10:19 PDT | ||
| Date/Time (PDT) | Inflow | Date/Time (PDT) | Inflow |
| 2026-05-19 00:00 | 156210 | 2026-05-19 17:00 | 154251.71 |
| 2026-05-18 00:00 | 128290 | 2026-05-19 23:00 | 153731.38 |
| 2026-05-17 00:00 | 123270 | 2026-05-20 05:00 | 153482.53 |
| 2026-05-16 00:00 | 148080 | 2026-05-20 11:00 | 153328.06 |
| 2026-05-15 00:00 | 147170 | 2026-05-20 17:00 | 153217.33 |
| 2026-05-14 00:00 | 133900 | 2026-05-20 23:00 | 153182.39 |
| 2026-05-13 00:00 | 145910 | 2026-05-21 05:00 | 153293.24 |
| 2026-05-12 00:00 | 152510 | 2026-05-21 11:00 | 153488.33 |
| 2026-05-11 00:00 | 131320 | 2026-05-21 17:00 | 153677.83 |
| 2026-05-10 00:00 | 166580 | 2026-05-21 23:00 | 153916.41 |
| 2026-05-09 00:00 | 119980 | 2026-05-22 05:00 | 154256.64 |
| 2026-05-22 11:00 | 154601.52 | ||
| 2026-05-22 17:00 | 154886.32 | ||
| 2026-05-22 23:00 | 155192.57 | ||
| 2026-05-23 05:00 | 155573.93 | ||
| 2026-05-23 11:00 | 155943.85 | ||
| 2026-05-23 17:00 | 156242.87 | ||
| 2026-05-23 23:00 | 156530.87 | ||
| 2026-05-24 05:00 | 156841.86 | ||
| 2026-05-24 11:00 | 157098.98 | ||
| 2026-05-24 17:00 | 157240.28 | ||
| 2026-05-24 23:00 | 157304.08 | ||
| 2026-05-25 05:00 | 157337.83 | ||
| 2026-05-25 11:00 | 157310.47 | ||
| 2026-05-25 17:00 | 157176.8 | ||
| 2026-05-25 23:00 | 156939.88 | ||
| 2026-05-26 05:00 | 156623.96 | ||
| 2026-05-26 11:00 | 156236.24 | ||
| 2026-05-26 17:00 | 155783.17 | ||
| 2026-05-26 23:00 | 155300.03 | ||
| 2026-05-27 05:00 | 154847.49 | ||
| 2026-05-27 11:00 | 154438.89 | ||
| 2026-05-27 17:00 | 154053.54 | ||
| 2026-05-27 23:00 | 153709.84 | ||
| 2026-05-28 05:00 | 153443.25 | ||
| 2026-05-28 11:00 | 153226.55 | ||
| 2026-05-28 17:00 | 153010.48 | ||
| 2026-05-28 23:00 | 152797.16 | ||
| 2026-05-29 05:00 | 152616.65 | ||