COLUMBIA--BLO ROCK ISLAND DAM (RISW1)
| Observed | Forecast/Trend Issued: 2026-09-27 10:35 PDT | ||
| Date/Time (PDT) | Inflow | Date/Time (PDT) | Inflow |
| 2026-09-28 00:00 | 74150 | 2026-09-28 05:00 | 66885.9 |
| 2026-09-27 00:00 | 67310 | 2026-09-28 11:00 | 66809.58 |
| 2026-09-26 00:00 | 41420 | 2026-09-28 17:00 | 66795.42 |
| 2026-09-25 00:00 | 68470 | 2026-09-28 23:00 | 66788.42 |
| 2026-09-24 00:00 | 59730 | 2026-09-29 05:00 | 66785.19 |
| 2026-09-23 00:00 | 39900 | 2026-09-29 11:00 | 66783.89 |
| 2026-09-22 00:00 | 56700 | 2026-09-29 17:00 | 66783.4 |
| 2026-09-21 00:00 | 41800 | 2026-09-29 23:00 | 66784.95 |
| 2026-09-20 00:00 | 49550 | 2026-09-30 05:00 | 69103.33 |
| 2026-09-19 00:00 | 50190 | 2026-09-30 11:00 | 73744.17 |
| 2026-09-18 00:00 | 52570 | 2026-09-30 17:00 | 76410.36 |
| 2026-09-30 23:00 | 76188.48 | ||
| 2026-10-01 05:00 | 72151.1 | ||
| 2026-10-01 11:00 | 65163.94 | ||
| 2026-10-01 17:00 | 60451.59 | ||
| 2026-10-01 23:00 | 59141.76 | ||
| 2026-10-02 05:00 | 59049.2 | ||
| 2026-10-02 11:00 | 59062.9 | ||
| 2026-10-02 17:00 | 59014.63 | ||
| 2026-10-02 23:00 | 58889.06 | ||
| 2026-10-03 05:00 | 58675.99 | ||
| 2026-10-03 11:00 | 58336.34 | ||
| 2026-10-03 17:00 | 57834.85 | ||
| 2026-10-03 23:00 | 57218.88 | ||
| 2026-10-04 05:00 | 56622.74 | ||
| 2026-10-04 11:00 | 56168.52 | ||
| 2026-10-04 17:00 | 55882.39 | ||
| 2026-10-04 23:00 | 55716.95 | ||
| 2026-10-05 05:00 | 55625.38 | ||
| 2026-10-05 11:00 | 55591.87 | ||
| 2026-10-05 17:00 | 55664.05 | ||
| 2026-10-05 23:00 | 56058.38 | ||
| 2026-10-06 05:00 | 56559.81 | ||
| 2026-10-06 11:00 | 56819.02 | ||
| 2026-10-06 17:00 | 56942.61 | ||
| 2026-10-06 23:00 | 57031.23 | ||
| 2026-10-07 05:00 | 57095.92 | ||