COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed | Forecast/Trend Issued: 2026-02-12 08:45 PST | ||
| Date/Time (PST) | Inflow | Date/Time (PST) | Inflow |
| 2026-02-12 00:00 | 103500 | 2026-02-12 22:00 | 100846.23 |
| 2026-02-11 00:00 | 104600 | 2026-02-13 04:00 | 100804.31 |
| 2026-02-10 00:00 | 103500 | 2026-02-13 10:00 | 100850.86 |
| 2026-02-09 00:00 | 100700 | 2026-02-13 16:00 | 100924.01 |
| 2026-02-08 00:00 | 100500 | 2026-02-13 22:00 | 101006.02 |
| 2026-02-07 00:00 | 100100 | 2026-02-14 04:00 | 101095.12 |
| 2026-02-06 00:00 | 104800 | 2026-02-14 10:00 | 101158.72 |
| 2026-02-05 00:00 | 107700 | 2026-02-14 16:00 | 101164.47 |
| 2026-02-04 00:00 | 101300 | 2026-02-14 22:00 | 101154.12 |
| 2026-02-03 00:00 | 107300 | 2026-02-15 04:00 | 101153.9 |
| 2026-02-02 00:00 | 109600 | 2026-02-15 10:00 | 101201.53 |
| 2026-02-15 16:00 | 101469.09 | ||
| 2026-02-15 22:00 | 102272.05 | ||
| 2026-02-16 04:00 | 103769.55 | ||
| 2026-02-16 10:00 | 105661.46 | ||
| 2026-02-16 16:00 | 107315.88 | ||
| 2026-02-16 22:00 | 108424.8 | ||
| 2026-02-17 04:00 | 109045.62 | ||
| 2026-02-17 10:00 | 109351.07 | ||
| 2026-02-17 16:00 | 109504.89 | ||
| 2026-02-17 22:00 | 109581.09 | ||
| 2026-02-18 04:00 | 109645.1 | ||
| 2026-02-18 10:00 | 109682.35 | ||
| 2026-02-18 16:00 | 109679.47 | ||
| 2026-02-18 22:00 | 109640.75 | ||
| 2026-02-19 04:00 | 109594.78 | ||
| 2026-02-19 10:00 | 109544.13 | ||
| 2026-02-19 16:00 | 109501.87 | ||
| 2026-02-19 22:00 | 109460.75 | ||
| 2026-02-20 04:00 | 109433.14 | ||
| 2026-02-20 10:00 | 109409.07 | ||
| 2026-02-20 16:00 | 109388.3 | ||
| 2026-02-20 22:00 | 109359.56 | ||
| 2026-02-21 04:00 | 109338.6 | ||
| 2026-02-21 10:00 | 109312.03 | ||
| 2026-02-21 16:00 | 109276.7 | ||
| 2026-02-21 22:00 | 109232.01 | ||
| 2026-02-22 04:00 | 109197.45 | ||