COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PST) | Discharge |
| 2026-11-05 00:00 | 92144 | | |
| 2026-11-04 23:00 | 95056 | | |
| 2026-11-04 22:00 | 101919 | | |
| 2026-11-04 21:00 | 111569 | | |
| 2026-11-04 20:00 | 123231 | | |
| 2026-11-04 19:00 | 133019 | | |
| 2026-11-04 18:00 | 134319 | | |
| 2026-11-04 17:00 | 124325 | | |
| 2026-11-04 16:00 | 107356 | | |
| 2026-11-04 15:00 | 92019 | | |
| 2026-11-04 14:00 | 85269 | | |
| 2026-11-04 13:00 | 86688 | | |
| 2026-11-04 12:00 | 91731 | | |
| 2026-11-04 11:00 | 99794 | | |
| 2026-11-04 10:00 | 111513 | | |
| 2026-11-04 09:00 | 123306 | | |
| 2026-11-04 08:00 | 129000 | | |
| 2026-11-04 07:00 | 122300 | | |
| 2026-11-04 06:00 | 101994 | | |
| 2026-11-04 05:00 | 76569 | | |
| 2026-11-04 04:00 | 57819 | | |
| 2026-11-04 03:00 | 50862 | | |
| 2026-11-04 02:00 | 52513 | | |
| 2026-11-04 01:00 | 56625 | | |
| 2026-11-04 00:00 | 61206 | | |
| 2026-11-03 23:00 | 68812 | | |
| 2026-11-03 22:00 | 79237 | | |
| 2026-11-03 21:00 | 88706 | | |
| 2026-11-03 20:00 | 95306 | | |
| 2026-11-03 19:00 | 99400 | | |
| 2026-11-03 18:00 | 100094 | | |
| 2026-11-03 17:00 | 95025 | | |
| 2026-11-03 16:00 | 85450 | | |
| 2026-11-03 15:00 | 77725 | | |
| 2026-11-03 14:00 | 76062 | | |
| 2026-11-03 13:00 | 79875 | | |
| 2026-11-03 12:00 | 87050 | | |
| 2026-11-03 11:00 | 93000 | | |
| 2026-11-03 10:00 | 94987 | | |
| 2026-11-03 09:00 | 96050 | | |
| 2026-11-03 08:00 | 96338 | | |
| 2026-11-03 07:00 | 89981 | | |
| 2026-11-03 06:00 | 74200 | | |
| 2026-11-03 05:00 | 55000 | | |
| 2026-11-03 04:00 | 41600 | | |
| 2026-11-03 03:00 | 36850 | | |
| 2026-11-03 02:00 | 36794 | | |
| 2026-11-03 01:00 | 37194 | | |
| 2026-11-03 00:00 | 37725 | | |
| 2026-11-02 23:00 | 41425 | | |
| 2026-11-02 22:00 | 48962 | | |
| 2026-11-02 21:00 | 57663 | | |
| 2026-11-02 20:00 | 65956 | | |
| 2026-11-02 19:00 | 72219 | | |
| 2026-11-02 18:00 | 73938 | | |
| 2026-11-02 17:00 | 70200 | | |
| 2026-11-02 16:00 | 62538 | | |
| 2026-11-02 15:00 | 55019 | | |
| 2026-11-02 14:00 | 52075 | | |
| 2026-11-02 13:00 | 55619 | | |
| 2026-11-02 12:00 | 64369 | | |
| 2026-11-02 11:00 | 74737 | | |
| 2026-11-02 10:00 | 83556 | | |
| 2026-11-02 09:00 | 88575 | | |
| 2026-11-02 08:00 | 86481 | | |
| 2026-11-02 07:00 | 76438 | | |
| 2026-11-02 06:00 | 62875 | | |
| 2026-11-02 05:00 | 50013 | | |
| 2026-11-02 04:00 | 39556 | | |
| 2026-11-02 03:00 | 32800 | | |
| 2026-11-02 02:00 | 29881 | | |
| 2026-11-02 01:00 | 30269 | | |
| 2026-11-02 00:00 | 34375 | | |
| 2026-11-01 23:00 | 42094 | | |
| 2026-11-01 22:00 | 51769 | | |
| 2026-11-01 21:00 | 61856 | | |
| 2026-11-01 20:00 | 71419 | | |
| 2026-11-01 19:00 | 79188 | | |
| 2026-11-01 18:00 | 82631 | | |
| 2026-11-01 17:00 | 77625 | | |
| 2026-11-01 16:00 | 63394 | | |
| 2026-11-01 15:00 | 48131 | | |
| 2026-11-01 14:00 | 41825 | | |
| 2026-11-01 13:00 | 44688 | | |
| 2026-11-01 12:00 | 50431 | | |
| 2026-11-01 11:00 | 55987 | | |
| 2026-11-01 10:00 | 61344 | | |
| 2026-11-01 09:00 | 65487 | | |
| 2026-11-01 08:00 | 65987 | | |
| 2026-11-01 07:00 | 61169 | | |
| 2026-11-01 06:00 | 53038 | | |
| 2026-11-01 05:00 | 45531 | | |
| 2026-11-01 04:00 | 40688 | | |
| 2026-11-01 03:00 | 39025 | | |
| 2026-11-01 02:00 | 40456 | | |
| 2026-11-01 01:00 | 43269 | | |
| 2026-11-01 01:00 | 44844 | | |
| 2026-11-01 00:00 | 45188 | | |
| 2026-10-31 23:00 | 46481 | | |
| 2026-10-31 22:00 | 49094 | | |
| 2026-10-31 21:00 | 52406 | | |
| 2026-10-31 20:00 | 55644 | | |
| 2026-10-31 19:00 | 56944 | | |
| 2026-10-31 18:00 | 56481 | | |
| 2026-10-31 16:00 | 56500 | | |
| 2026-10-31 15:00 | 57431 | | |
| 2026-10-31 14:00 | 59031 | | |
| 2026-10-31 13:00 | 62281 | | |
| 2026-10-31 12:00 | 67831 | | |
| 2026-10-31 11:00 | 74781 | | |
| 2026-10-31 10:00 | 80794 | | |
| 2026-10-31 09:00 | 83569 | | |
| 2026-10-31 08:00 | 81713 | | |
| 2026-10-31 07:00 | 75269 | | |
| 2026-10-31 06:00 | 66963 | | |
| 2026-10-31 05:00 | 59406 | | |
| 2026-10-31 04:00 | 52769 | | |
| 2026-10-31 03:00 | 47550 | | |
| 2026-10-31 02:00 | 44906 | | |
| 2026-10-31 01:00 | 45275 | | |
| 2026-10-31 00:00 | 49212 | | |
| 2026-10-30 23:00 | 55869 | | |
| 2026-10-30 22:00 | 61794 | | |
| 2026-10-30 21:00 | 65569 | | |
| 2026-10-30 20:00 | 68819 | | |
| 2026-10-30 19:00 | 70844 | | |
| 2026-10-30 18:00 | 69781 | | |
| 2026-10-30 17:00 | 66969 | | |
| 2026-10-30 16:00 | 64825 | | |
| 2026-10-30 15:00 | 64750 | | |
| 2026-10-30 14:00 | 67294 | | |
| 2026-10-30 13:00 | 70525 | | |
| 2026-10-30 12:00 | 72106 | | |
| 2026-10-30 11:00 | 73100 | | |
| 2026-10-30 10:00 | 75481 | | |
| 2026-10-30 09:00 | 79144 | | |
| 2026-10-30 08:00 | 81681 | | |
| 2026-10-30 07:00 | 79981 | | |
| 2026-10-30 06:00 | 73075 | | |
| 2026-10-30 05:00 | 62156 | | |
| 2026-10-30 04:00 | 50706 | | |
| 2026-10-30 03:00 | 43369 | | |
| 2026-10-30 02:00 | 41288 | | |
| 2026-10-30 01:00 | 42237 | | |
| 2026-10-30 00:00 | 44388 | | |
| 2026-10-29 23:00 | 47825 | | |
| 2026-10-29 22:00 | 53513 | | |
| 2026-10-29 21:00 | 60756 | | |
| 2026-10-29 20:00 | 67694 | | |
| 2026-10-29 19:00 | 73013 | | |
| 2026-10-29 18:00 | 75175 | | |
| 2026-10-29 17:00 | 72231 | | |
| 2026-10-29 16:00 | 64406 | | |
| 2026-10-29 15:00 | 56531 | | |
| 2026-10-29 14:00 | 54094 | | |
| 2026-10-29 13:00 | 57388 | | |
| 2026-10-29 12:00 | 63469 | | |
| 2026-10-29 11:00 | 70237 | | |
| 2026-10-29 10:00 | 76469 | | |
| 2026-10-29 09:00 | 81894 | | |
| 2026-10-29 08:00 | 85987 | | |
| 2026-10-29 07:00 | 86062 | | |
| 2026-10-29 06:00 | 79875 | | |
| 2026-10-29 05:00 | 68037 | | |
| 2026-10-29 04:00 | 54444 | | |
| 2026-10-29 03:00 | 44675 | | |
| 2026-10-29 02:00 | 40587 | | |
| 2026-10-29 01:00 | 39781 | | |
| 2026-10-29 00:00 | 41031 | | |
| 2026-10-28 23:00 | 45581 | | |
| 2026-10-28 22:00 | 52788 | | |
| 2026-10-28 21:00 | 59237 | | |
| 2026-10-28 20:00 | 63075 | | |
| 2026-10-28 19:00 | 64225 | | |
| 2026-10-28 18:00 | 62781 | | |
| 2026-10-28 17:00 | 60306 | | |
| 2026-10-28 16:00 | 58256 | | |
| 2026-10-28 15:00 | 56381 | | |
| 2026-10-28 14:00 | 55506 | | |
| 2026-10-28 13:00 | 57075 | | |
| 2026-10-28 12:00 | 60362 | | |
| 2026-10-28 11:00 | 63663 | | |
| 2026-10-28 10:00 | 65875 | | |
| 2026-10-28 09:00 | 67044 | | |
| 2026-10-28 08:00 | 68062 | | |
| 2026-10-28 07:00 | 68556 | | |
| 2026-10-28 06:00 | 66444 | | |
| 2026-10-28 05:00 | 61000 | | |
| 2026-10-28 04:00 | 54800 | | |
| 2026-10-28 03:00 | 50469 | | |
| 2026-10-28 02:00 | 47850 | | |
| 2026-10-28 01:00 | 46362 | | |
| 2026-10-28 00:00 | 45719 | | |
| 2026-10-27 23:00 | 44825 | | |
| 2026-10-27 22:00 | 43919 | | |
| 2026-10-27 21:00 | 45194 | | |
| 2026-10-27 20:00 | 49538 | | |
| 2026-10-27 19:00 | 54075 | | |
| 2026-10-27 18:00 | 55369 | | |
| 2026-10-27 17:00 | 53631 | | |
| 2026-10-27 16:00 | 50913 | | |
| 2026-10-27 15:00 | 49337 | | |
| 2026-10-27 14:00 | 50644 | | |
| 2026-10-27 13:00 | 53700 | | |
| 2026-10-27 12:00 | 55544 | | |
| 2026-10-27 11:00 | 55531 | | |
| 2026-10-27 10:00 | 56150 | | |
| 2026-10-27 09:00 | 59725 | | |
| 2026-10-27 08:00 | 65100 | | |
| 2026-10-27 07:00 | 68713 | | |
| 2026-10-27 06:00 | 68219 | | |
| 2026-10-27 05:00 | 61819 | | |
| 2026-10-27 04:00 | 49225 | | |
| 2026-10-27 03:00 | 36675 | | |
| 2026-10-27 02:00 | 30669 | | |
| 2026-10-27 01:00 | 29806 | | |
| 2026-10-27 00:00 | 30694 | | |
| 2026-10-26 23:00 | 32888 | | |
| 2026-10-26 22:00 | 36275 | | |
| 2026-10-26 21:00 | 40456 | | |
| 2026-10-26 20:00 | 45419 | | |
| 2026-10-26 19:00 | 49769 | | |
| 2026-10-26 18:00 | 49837 | | |
| 2026-10-26 17:00 | 43869 | | |
| 2026-10-26 16:00 | 36106 | | |
| 2026-10-26 15:00 | 32431 | | |
| 2026-10-26 14:00 | 33881 | | |
| 2026-10-26 13:00 | 37431 | | |
| 2026-10-26 12:00 | 40356 | | |
| 2026-10-26 11:00 | 43175 | | |
| 2026-10-26 10:00 | 47969 | | |
| 2026-10-26 09:00 | 55038 | | |
| 2026-10-26 08:00 | 62906 | | |
| 2026-10-26 07:00 | 66419 | | |
| 2026-10-26 06:00 | 59562 | | |
| 2026-10-26 05:00 | 45544 | | |
| 2026-10-26 04:00 | 34175 | | |
| 2026-10-26 03:00 | 29988 | | |
| 2026-10-26 02:00 | 30575 | | |
| 2026-10-26 01:00 | 32394 | | |
| 2026-10-26 00:00 | 33725 | | |
| 2026-10-25 23:00 | 34544 | | |
| 2026-10-25 22:00 | 35775 | | |
| 2026-10-25 21:00 | 38737 | | |
| 2026-10-25 20:00 | 44700 | | |
| 2026-10-25 19:00 | 52050 | | |
| 2026-10-25 18:00 | 55763 | | |
| 2026-10-25 17:00 | 53269 | | |
| 2026-10-25 16:00 | 47350 | | |