COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed | Forecast/Trend |
| Date/Time (PST) | Inflow | Date/Time (PST) | Inflow |
| 2022-12-01 00:00 | 78900 | 2022-12-01 22:00 | 88895.13 |
| 2022-11-30 23:59 | 78900 | 2022-12-02 04:00 | 92077.74 |
| 2022-11-30 00:00 | 98500 | 2022-12-02 10:00 | 94839.55 |
| 2022-11-29 23:59 | 98500 | 2022-12-02 16:00 | 96594.81 |
| 2022-11-29 00:00 | 80000 | 2022-12-02 22:00 | 97161.05 |
| 2022-11-28 23:59 | 80000 | 2022-12-03 04:00 | 95843.59 |
| 2022-11-28 00:00 | 84100 | 2022-12-03 10:00 | 91262.81 |
| 2022-11-27 23:59 | 84100 | 2022-12-03 16:00 | 84789.91 |
| 2022-11-27 00:00 | 89200 | 2022-12-03 22:00 | 80143.93 |
| 2022-11-26 23:59 | 89200 | 2022-12-04 04:00 | 78362.21 |
| 2022-11-26 00:00 | 76800 | 2022-12-04 10:00 | 77914.05 |
| 2022-11-25 23:59 | 76800 | 2022-12-04 16:00 | 77774.86 |
| 2022-11-25 00:00 | 83900 | 2022-12-04 22:00 | 77719.39 |
| 2022-11-24 23:59 | 83900 | 2022-12-05 04:00 | 77694.98 |
| 2022-11-24 00:00 | 83700 | 2022-12-05 10:00 | 77680.27 |
| 2022-11-23 23:59 | 83700 | 2022-12-05 16:00 | 77666.26 |
| 2022-11-23 00:00 | 88200 | 2022-12-05 22:00 | 77651.71 |
| 2022-11-22 23:59 | 88200 | 2022-12-06 04:00 | 77675.4 |
| 2022-11-22 00:00 | 97800 | 2022-12-06 10:00 | 77819.15 |
| 2022-11-21 23:59 | 97800 | 2022-12-06 16:00 | 78055.75 |
| 2022-11-21 00:00 | 87700 | 2022-12-06 22:00 | 78230.76 |
| 2022-11-20 23:59 | 87700 | 2022-12-07 04:00 | 78287.57 |
| | | 2022-12-07 10:00 | 78290.16 |
| | | 2022-12-07 16:00 | 78283.18 |
| | | 2022-12-07 22:00 | 78275 |
| | | 2022-12-08 04:00 | 78267.37 |
| | | 2022-12-08 10:00 | 78260.01 |
| | | 2022-12-08 16:00 | 78251.12 |
| | | 2022-12-08 22:00 | 78240.71 |
| | | 2022-12-09 04:00 | 78204 |
| | | 2022-12-09 10:00 | 78083.13 |
| | | 2022-12-09 16:00 | 77896.44 |
| | | 2022-12-09 22:00 | 77754.65 |
| | | 2022-12-10 04:00 | 77736.98 |
| | | 2022-12-10 10:00 | 77710.02 |
| | | 2022-12-10 16:00 | 77608.27 |
| | | 2022-12-10 22:00 | 77381.27 |
| | | 2022-12-11 04:00 | 77249.89 |