COLUMBIA--WANAPUM DAM (WANW1)
| Observed | Forecast/Trend Issued: 2026-06-26 10:52 PDT | ||
| Date/Time (PDT) | Pool Height | Date/Time (PDT) | Pool Height |
| 2026-06-26 00:00 | 564.99 | 2026-06-26 23:00 | 565.94 |
| 2026-06-25 00:00 | 565.52 | 2026-06-27 05:00 | 565.94 |
| 2026-06-24 00:00 | 566.49 | 2026-06-27 11:00 | 565.94 |
| 2026-06-23 00:00 | 565.57 | 2026-06-27 17:00 | 565.94 |
| 2026-06-22 00:00 | 565.17 | 2026-06-27 23:00 | 565.94 |
| 2026-06-21 00:00 | 567.6 | 2026-06-28 05:00 | 565.94 |
| 2026-06-20 00:00 | 566.81 | 2026-06-28 11:00 | 565.94 |
| 2026-06-19 00:00 | 566.72 | 2026-06-28 17:00 | 565.94 |
| 2026-06-18 00:00 | 568.76 | 2026-06-28 23:00 | 565.94 |
| 2026-06-17 00:00 | 570.78 | 2026-06-29 05:00 | 565.94 |
| 2026-06-16 00:00 | 570.74 | 2026-06-29 11:00 | 565.94 |
| 2026-06-29 17:00 | 565.94 | ||
| 2026-06-29 23:00 | 565.94 | ||
| 2026-06-30 05:00 | 565.94 | ||
| 2026-06-30 11:00 | 565.94 | ||
| 2026-06-30 17:00 | 565.94 | ||
| 2026-06-30 23:00 | 565.94 | ||
| 2026-07-01 05:00 | 565.94 | ||
| 2026-07-01 11:00 | 565.94 | ||
| 2026-07-01 17:00 | 565.94 | ||
| 2026-07-01 23:00 | 565.94 | ||
| 2026-07-02 05:00 | 565.94 | ||
| 2026-07-02 11:00 | 565.94 | ||
| 2026-07-02 17:00 | 565.94 | ||
| 2026-07-02 23:00 | 565.94 | ||
| 2026-07-03 05:00 | 565.94 | ||
| 2026-07-03 11:00 | 565.94 | ||
| 2026-07-03 17:00 | 565.94 | ||
| 2026-07-03 23:00 | 565.94 | ||
| 2026-07-04 05:00 | 565.94 | ||
| 2026-07-04 11:00 | 565.94 | ||
| 2026-07-04 17:00 | 565.94 | ||
| 2026-07-04 23:00 | 565.94 | ||
| 2026-07-05 05:00 | 565.94 | ||
| 2026-07-05 11:00 | 565.94 | ||
| 2026-07-05 17:00 | 565.94 | ||
| 2026-07-05 23:00 | 565.94 | ||
| 2026-07-06 05:00 | 565.94 | ||