COLUMBIA--BLO ROCK ISLAND DAM (RISW1)
| Observed | Forecast/Trend Issued: 2026-07-28 09:50 PDT | ||
| Date/Time (PDT) | Inflow | Date/Time (PDT) | Inflow |
| 2026-07-28 00:00 | 103840 | 2026-07-28 23:00 | 99764.93 |
| 2026-07-27 00:00 | 91510 | 2026-07-29 05:00 | 99704.28 |
| 2026-07-26 00:00 | 78050 | 2026-07-29 11:00 | 99981.11 |
| 2026-07-25 00:00 | 106130 | 2026-07-29 17:00 | 100260.12 |
| 2026-07-24 00:00 | 110610 | 2026-07-29 23:00 | 100514.53 |
| 2026-07-23 00:00 | 106640 | 2026-07-30 05:00 | 100778.17 |
| 2026-07-22 00:00 | 92420 | 2026-07-30 11:00 | 101060.36 |
| 2026-07-21 00:00 | 94530 | 2026-07-30 17:00 | 101333.43 |
| 2026-07-20 00:00 | 101400 | 2026-07-30 23:00 | 101596.61 |
| 2026-07-19 00:00 | 81000 | 2026-07-31 05:00 | 101867.59 |
| 2026-07-18 00:00 | 84230 | 2026-07-31 11:00 | 102144.49 |
| 2026-07-31 17:00 | 102421.79 | ||
| 2026-07-31 23:00 | 102697.11 | ||
| 2026-08-01 05:00 | 102915.75 | ||
| 2026-08-01 11:00 | 103016.22 | ||
| 2026-08-01 17:00 | 103031.81 | ||
| 2026-08-01 23:00 | 103021.19 | ||
| 2026-08-02 05:00 | 103007.58 | ||
| 2026-08-02 11:00 | 102994.85 | ||
| 2026-08-02 17:00 | 102981.05 | ||
| 2026-08-02 23:00 | 102964.67 | ||
| 2026-08-03 05:00 | 102948.49 | ||
| 2026-08-03 11:00 | 102934.08 | ||
| 2026-08-03 17:00 | 102921.1 | ||
| 2026-08-03 23:00 | 102909.23 | ||
| 2026-08-04 05:00 | 102898.85 | ||
| 2026-08-04 11:00 | 102890.33 | ||
| 2026-08-04 17:00 | 102882.63 | ||
| 2026-08-04 23:00 | 102873.87 | ||
| 2026-08-05 05:00 | 102865.46 | ||
| 2026-08-05 11:00 | 102857.47 | ||
| 2026-08-05 17:00 | 102848.65 | ||
| 2026-08-05 23:00 | 102839.73 | ||
| 2026-08-06 05:00 | 102831.85 | ||
| 2026-08-06 11:00 | 102824.81 | ||
| 2026-08-06 17:00 | 102817.34 | ||
| 2026-08-06 23:00 | 102808.49 | ||
| 2026-08-07 05:00 | 102799.73 | ||