COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed | Forecast/Trend Issued: 2026-11-06 07:27 PST | ||
| Date/Time (PST) | Inflow | Date/Time (PST) | Inflow |
| 2026-11-07 00:00 | 74100 | 2026-11-07 10:00 | 75387.76 |
| 2026-11-06 00:00 | 73700 | 2026-11-07 16:00 | 75092.46 |
| 2026-11-05 00:00 | 77400 | 2026-11-07 22:00 | 74949.29 |
| 2026-11-04 00:00 | 74000 | 2026-11-08 04:00 | 74866.35 |
| 2026-11-03 00:00 | 76400 | 2026-11-08 10:00 | 74722.31 |
| 2026-11-02 00:00 | 63400 | 2026-11-08 16:00 | 74345.64 |
| 2026-11-01 00:00 | 58000 | 2026-11-08 22:00 | 73652.2 |
| 2026-10-30 23:00 | 59200 | 2026-11-09 04:00 | 72778.44 |
| 2026-10-29 23:00 | 59000 | 2026-11-09 10:00 | 71972.9 |
| 2026-10-28 23:00 | 57700 | 2026-11-09 16:00 | 71384.41 |
| 2026-10-27 23:00 | 51500 | 2026-11-09 22:00 | 71013.87 |
| 2026-11-10 04:00 | 70803.87 | ||
| 2026-11-10 10:00 | 70720.97 | ||
| 2026-11-10 16:00 | 70755.17 | ||
| 2026-11-10 22:00 | 70895.01 | ||
| 2026-11-11 04:00 | 71128.75 | ||
| 2026-11-11 10:00 | 71437.45 | ||
| 2026-11-11 16:00 | 71771.99 | ||
| 2026-11-11 22:00 | 72072.53 | ||
| 2026-11-12 04:00 | 72299.58 | ||
| 2026-11-12 10:00 | 72447.33 | ||
| 2026-11-12 16:00 | 72531.89 | ||
| 2026-11-12 22:00 | 72577.88 | ||
| 2026-11-13 04:00 | 72607.9 | ||
| 2026-11-13 10:00 | 72640.18 | ||
| 2026-11-13 16:00 | 72684.5 | ||
| 2026-11-13 22:00 | 72744.62 | ||
| 2026-11-14 04:00 | 72823.05 | ||
| 2026-11-14 10:00 | 72931.81 | ||
| 2026-11-14 16:00 | 73093.46 | ||
| 2026-11-14 22:00 | 73328.18 | ||
| 2026-11-15 04:00 | 73610.86 | ||
| 2026-11-15 10:00 | 73793.89 | ||
| 2026-11-15 16:00 | 73604.66 | ||
| 2026-11-15 22:00 | 72876.53 | ||
| 2026-11-16 04:00 | 71775.73 | ||