COLUMBIA--BLO ROCK ISLAND DAM (RISW1)
| Observed | Forecast/Trend Issued: 2026-11-13 08:17 PST | ||
| Date/Time (PST) | Pool Height | Date/Time (PST) | Pool Height |
| 2026-11-14 00:00 | 611.94 | 2026-11-14 10:00 | 612.35 |
| 2026-11-13 00:00 | 612.14 | 2026-11-14 16:00 | 612.35 |
| 2026-11-12 00:00 | 612.09 | 2026-11-14 22:00 | 612.35 |
| 2026-11-11 00:00 | 611.95 | 2026-11-15 04:00 | 612.35 |
| 2026-11-10 00:00 | 612 | 2026-11-15 10:00 | 612.35 |
| 2026-11-09 00:00 | 612.2 | 2026-11-15 16:00 | 612.35 |
| 2026-11-08 00:00 | 611.84 | 2026-11-15 22:00 | 612.35 |
| 2026-11-07 00:00 | 612.01 | 2026-11-16 04:00 | 612.35 |
| 2026-11-06 00:00 | 612.04 | 2026-11-16 10:00 | 612.35 |
| 2026-11-05 00:00 | 612.12 | 2026-11-16 16:00 | 612.35 |
| 2026-11-04 00:00 | 612.12 | 2026-11-16 22:00 | 612.35 |
| 2026-11-17 04:00 | 612.35 | ||
| 2026-11-17 10:00 | 612.35 | ||
| 2026-11-17 16:00 | 612.35 | ||
| 2026-11-17 22:00 | 612.35 | ||
| 2026-11-18 04:00 | 612.35 | ||
| 2026-11-18 10:00 | 612.35 | ||
| 2026-11-18 16:00 | 612.35 | ||
| 2026-11-18 22:00 | 612.35 | ||
| 2026-11-19 04:00 | 612.35 | ||
| 2026-11-19 10:00 | 612.35 | ||
| 2026-11-19 16:00 | 612.35 | ||
| 2026-11-19 22:00 | 612.35 | ||
| 2026-11-20 04:00 | 612.35 | ||
| 2026-11-20 10:00 | 612.35 | ||
| 2026-11-20 16:00 | 612.35 | ||
| 2026-11-20 22:00 | 612.35 | ||
| 2026-11-21 04:00 | 612.35 | ||
| 2026-11-21 10:00 | 612.35 | ||
| 2026-11-21 16:00 | 612.35 | ||
| 2026-11-21 22:00 | 612.35 | ||
| 2026-11-22 04:00 | 612.35 | ||
| 2026-11-22 10:00 | 612.35 | ||
| 2026-11-22 16:00 | 612.35 | ||
| 2026-11-22 22:00 | 612.35 | ||
| 2026-11-23 04:00 | 612.35 | ||