COLUMBIA--BLO ROCK ISLAND DAM (RISW1)
| Observed | Forecast/Trend Issued: 2025-12-27 10:23 PST | ||
| Date/Time (PST) | Pool Height | Date/Time (PST) | Pool Height |
| 2025-12-28 00:00 | 611.86 | 2025-12-28 10:00 | 611.63 |
| 2025-12-27 00:00 | 611.03 | 2025-12-28 16:00 | 611.63 |
| 2025-12-26 00:00 | 610.69 | 2025-12-28 22:00 | 611.63 |
| 2025-12-25 00:00 | 611.5 | 2025-12-29 04:00 | 611.63 |
| 2025-12-24 00:00 | 612.08 | 2025-12-29 10:00 | 611.63 |
| 2025-12-23 00:00 | 612.25 | 2025-12-29 16:00 | 611.63 |
| 2025-12-22 00:00 | 612.13 | 2025-12-29 22:00 | 611.63 |
| 2025-12-21 00:00 | 611.83 | 2025-12-30 04:00 | 611.63 |
| 2025-12-20 00:00 | 611.81 | 2025-12-30 10:00 | 611.63 |
| 2025-12-19 00:00 | 611.95 | 2025-12-30 16:00 | 611.63 |
| 2025-12-18 00:00 | 611.84 | 2025-12-30 22:00 | 611.63 |
| 2025-12-31 04:00 | 611.63 | ||
| 2025-12-31 10:00 | 611.63 | ||
| 2025-12-31 16:00 | 611.63 | ||
| 2025-12-31 22:00 | 611.63 | ||
| 2026-01-01 04:00 | 611.63 | ||
| 2026-01-01 10:00 | 611.63 | ||
| 2026-01-01 16:00 | 611.63 | ||
| 2026-01-01 22:00 | 611.63 | ||
| 2026-01-02 04:00 | 611.63 | ||
| 2026-01-02 10:00 | 611.63 | ||
| 2026-01-02 16:00 | 611.63 | ||
| 2026-01-02 22:00 | 611.63 | ||
| 2026-01-03 04:00 | 611.63 | ||
| 2026-01-03 10:00 | 611.63 | ||
| 2026-01-03 16:00 | 611.63 | ||
| 2026-01-03 22:00 | 611.63 | ||
| 2026-01-04 04:00 | 611.63 | ||
| 2026-01-04 10:00 | 611.63 | ||
| 2026-01-04 16:00 | 611.63 | ||
| 2026-01-04 22:00 | 611.63 | ||
| 2026-01-05 04:00 | 611.63 | ||
| 2026-01-05 10:00 | 611.63 | ||
| 2026-01-05 16:00 | 611.63 | ||
| 2026-01-05 22:00 | 611.63 | ||
| 2026-01-06 04:00 | 611.63 | ||