COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-09-20 03:00 | 37987 | | |
| 2026-09-20 02:00 | 40644 | | |
| 2026-09-20 01:00 | 43337 | | |
| 2026-09-20 00:00 | 45375 | | |
| 2026-09-19 23:00 | 48538 | | |
| 2026-09-19 22:00 | 54644 | | |
| 2026-09-19 21:00 | 62456 | | |
| 2026-09-19 20:00 | 68025 | | |
| 2026-09-19 19:00 | 68056 | | |
| 2026-09-19 18:00 | 62169 | | |
| 2026-09-19 17:00 | 52913 | | |
| 2026-09-19 16:00 | 44006 | | |
| 2026-09-19 15:00 | 38275 | | |
| 2026-09-19 14:00 | 36500 | | |
| 2026-09-19 13:00 | 37569 | | |
| 2026-09-19 12:00 | 39288 | | |
| 2026-09-19 11:00 | 39681 | | |
| 2026-09-19 10:00 | 38250 | | |
| 2026-09-19 09:00 | 35587 | | |
| 2026-09-19 08:00 | 33319 | | |
| 2026-09-19 07:00 | 33337 | | |
| 2026-09-19 06:00 | 35188 | | |
| 2026-09-19 05:00 | 36562 | | |
| 2026-09-19 04:00 | 36525 | | |
| 2026-09-19 03:00 | 36606 | | |
| 2026-09-19 02:00 | 37981 | | |
| 2026-09-19 01:00 | 39094 | | |
| 2026-09-19 00:00 | 38800 | | |
| 2026-09-18 23:00 | 38562 | | |
| 2026-09-18 22:00 | 40288 | | |
| 2026-09-18 21:00 | 45350 | | |
| 2026-09-18 20:00 | 52962 | | |
| 2026-09-18 19:00 | 58106 | | |
| 2026-09-18 18:00 | 55994 | | |
| 2026-09-18 17:00 | 48931 | | |
| 2026-09-18 16:00 | 43763 | | |
| 2026-09-18 15:00 | 43225 | | |
| 2026-09-18 14:00 | 44650 | | |
| 2026-09-18 13:00 | 44725 | | |
| 2026-09-18 12:00 | 42456 | | |
| 2026-09-18 11:00 | 39444 | | |
| 2026-09-18 10:00 | 38138 | | |
| 2026-09-18 09:00 | 39200 | | |
| 2026-09-18 08:00 | 40044 | | |
| 2026-09-18 07:00 | 38656 | | |
| 2026-09-18 06:00 | 36919 | | |
| 2026-09-18 05:00 | 35806 | | |
| 2026-09-18 04:00 | 34087 | | |
| 2026-09-18 03:00 | 32862 | | |
| 2026-09-18 02:00 | 34513 | | |
| 2026-09-18 01:00 | 38862 | | |
| 2026-09-18 00:00 | 44000 | | |
| 2026-09-17 23:00 | 49812 | | |
| 2026-09-17 22:00 | 57612 | | |
| 2026-09-17 21:00 | 67150 | | |
| 2026-09-17 20:00 | 76050 | | |
| 2026-09-17 19:00 | 81150 | | |
| 2026-09-17 18:00 | 81056 | | |
| 2026-09-17 17:00 | 76812 | | |
| 2026-09-17 16:00 | 70619 | | |
| 2026-09-17 15:00 | 64556 | | |
| 2026-09-17 14:00 | 58869 | | |
| 2026-09-17 13:00 | 53694 | | |
| 2026-09-17 12:00 | 50656 | | |
| 2026-09-17 11:00 | 49406 | | |
| 2026-09-17 10:00 | 47669 | | |
| 2026-09-17 09:00 | 45825 | | |
| 2026-09-17 08:00 | 44775 | | |
| 2026-09-17 07:00 | 42781 | | |
| 2026-09-17 06:00 | 39281 | | |
| 2026-09-17 05:00 | 35531 | | |
| 2026-09-17 04:00 | 32850 | | |
| 2026-09-17 03:00 | 33006 | | |
| 2026-09-17 02:00 | 36700 | | |
| 2026-09-17 01:00 | 42812 | | |
| 2026-09-17 00:00 | 49138 | | |
| 2026-09-16 23:00 | 53244 | | |
| 2026-09-16 22:00 | 55069 | | |
| 2026-09-16 21:00 | 57150 | | |
| 2026-09-16 20:00 | 59737 | | |
| 2026-09-16 19:00 | 58837 | | |
| 2026-09-16 18:00 | 51987 | | |
| 2026-09-16 17:00 | 42256 | | |
| 2026-09-16 16:00 | 34375 | | |
| 2026-09-16 15:00 | 30656 | | |
| 2026-09-16 14:00 | 30781 | | |
| 2026-09-16 13:00 | 32800 | | |
| 2026-09-16 12:00 | 35219 | | |
| 2026-09-16 11:00 | 38094 | | |
| 2026-09-16 10:00 | 41587 | | |
| 2026-09-16 09:00 | 45144 | | |
| 2026-09-16 08:00 | 47763 | | |
| 2026-09-16 07:00 | 48138 | | |
| 2026-09-16 06:00 | 45706 | | |
| 2026-09-16 05:00 | 42531 | | |
| 2026-09-16 04:00 | 42106 | | |
| 2026-09-16 03:00 | 44425 | | |
| 2026-09-16 02:00 | 45612 | | |
| 2026-09-16 01:00 | 43913 | | |
| 2026-09-16 00:00 | 41931 | | |
| 2026-09-15 23:00 | 42169 | | |
| 2026-09-15 22:00 | 44106 | | |
| 2026-09-15 21:00 | 46362 | | |
| 2026-09-15 20:00 | 48538 | | |
| 2026-09-15 19:00 | 50862 | | |
| 2026-09-15 18:00 | 52638 | | |
| 2026-09-15 17:00 | 50850 | | |
| 2026-09-15 16:00 | 45006 | | |
| 2026-09-15 15:00 | 40631 | | |
| 2026-09-15 14:00 | 41337 | | |
| 2026-09-15 13:00 | 44931 | | |
| 2026-09-15 12:00 | 49050 | | |
| 2026-09-15 11:00 | 52869 | | |
| 2026-09-15 10:00 | 55744 | | |
| 2026-09-15 09:00 | 57506 | | |
| 2026-09-15 08:00 | 58038 | | |
| 2026-09-15 07:00 | 55487 | | |
| 2026-09-15 06:00 | 48388 | | |
| 2026-09-15 05:00 | 40212 | | |
| 2026-09-15 04:00 | 35562 | | |
| 2026-09-15 03:00 | 34256 | | |
| 2026-09-15 02:00 | 34319 | | |
| 2026-09-15 01:00 | 36138 | | |
| 2026-09-15 00:00 | 40138 | | |
| 2026-09-14 23:00 | 44413 | | |
| 2026-09-14 22:00 | 48525 | | |
| 2026-09-14 21:00 | 53775 | | |
| 2026-09-14 20:00 | 58600 | | |
| 2026-09-14 19:00 | 59675 | | |
| 2026-09-14 18:00 | 54800 | | |
| 2026-09-14 17:00 | 45581 | | |
| 2026-09-14 16:00 | 38369 | | |
| 2026-09-14 15:00 | 36106 | | |
| 2026-09-14 14:00 | 34550 | | |
| 2026-09-14 13:00 | 31556 | | |
| 2026-09-14 12:00 | 29681 | | |
| 2026-09-14 11:00 | 29325 | | |
| 2026-09-14 10:00 | 29031 | | |
| 2026-09-14 09:00 | 30512 | | |
| 2026-09-14 08:00 | 36763 | | |
| 2026-09-14 07:00 | 44638 | | |
| 2026-09-14 06:00 | 46288 | | |
| 2026-09-14 05:00 | 40650 | | |
| 2026-09-14 04:00 | 34544 | | |
| 2026-09-14 03:00 | 32281 | | |
| 2026-09-14 02:00 | 32844 | | |
| 2026-09-14 01:00 | 34625 | | |
| 2026-09-14 00:00 | 37075 | | |
| 2026-09-13 23:00 | 40062 | | |
| 2026-09-13 22:00 | 44062 | | |
| 2026-09-13 21:00 | 49100 | | |
| 2026-09-13 20:00 | 53263 | | |
| 2026-09-13 19:00 | 54200 | | |
| 2026-09-13 18:00 | 51675 | | |
| 2026-09-13 17:00 | 47619 | | |
| 2026-09-13 16:00 | 44194 | | |
| 2026-09-13 15:00 | 42275 | | |
| 2026-09-13 14:00 | 41656 | | |
| 2026-09-13 13:00 | 41894 | | |
| 2026-09-13 12:00 | 42581 | | |
| 2026-09-13 11:00 | 43069 | | |
| 2026-09-13 10:00 | 42862 | | |
| 2026-09-13 09:00 | 42875 | | |
| 2026-09-13 08:00 | 43656 | | |
| 2026-09-13 07:00 | 42881 | | |
| 2026-09-13 06:00 | 39344 | | |
| 2026-09-13 05:00 | 36250 | | |
| 2026-09-13 04:00 | 36781 | | |
| 2026-09-13 03:00 | 40669 | | |
| 2026-09-13 02:00 | 44837 | | |
| 2026-09-13 01:00 | 46369 | | |
| 2026-09-13 00:00 | 46663 | | |
| 2026-09-12 23:00 | 48806 | | |
| 2026-09-12 22:00 | 51763 | | |
| 2026-09-12 21:00 | 53106 | | |
| 2026-09-12 20:00 | 53806 | | |
| 2026-09-12 19:00 | 55131 | | |
| 2026-09-12 18:00 | 54987 | | |
| 2026-09-12 17:00 | 51294 | | |
| 2026-09-12 16:00 | 45888 | | |
| 2026-09-12 15:00 | 41750 | | |
| 2026-09-12 14:00 | 39556 | | |
| 2026-09-12 13:00 | 39369 | | |
| 2026-09-12 12:00 | 40906 | | |
| 2026-09-12 11:00 | 42469 | | |
| 2026-09-12 10:00 | 43025 | | |
| 2026-09-12 09:00 | 42675 | | |
| 2026-09-12 08:00 | 41131 | | |
| 2026-09-12 07:00 | 37712 | | |
| 2026-09-12 06:00 | 32875 | | |
| 2026-09-12 05:00 | 28881 | | |
| 2026-09-12 04:00 | 28038 | | |
| 2026-09-12 03:00 | 31387 | | |
| 2026-09-12 02:00 | 38013 | | |
| 2026-09-12 01:00 | 45087 | | |
| 2026-09-12 00:00 | 50194 | | |
| 2026-09-11 23:00 | 53163 | | |
| 2026-09-11 22:00 | 55969 | | |
| 2026-09-11 21:00 | 60688 | | |
| 2026-09-11 20:00 | 66300 | | |
| 2026-09-11 19:00 | 68369 | | |
| 2026-09-11 18:00 | 64088 | | |
| 2026-09-11 17:00 | 56719 | | |
| 2026-09-11 16:00 | 51519 | | |
| 2026-09-11 15:00 | 49206 | | |
| 2026-09-11 14:00 | 47812 | | |
| 2026-09-11 13:00 | 47175 | | |
| 2026-09-11 12:00 | 46925 | | |
| 2026-09-11 11:00 | 44688 | | |
| 2026-09-11 10:00 | 39888 | | |
| 2026-09-11 09:00 | 35606 | | |
| 2026-09-11 08:00 | 34781 | | |
| 2026-09-11 07:00 | 36487 | | |
| 2026-09-11 06:00 | 37288 | | |
| 2026-09-11 05:00 | 35869 | | |
| 2026-09-11 04:00 | 34263 | | |
| 2026-09-11 03:00 | 34000 | | |
| 2026-09-11 02:00 | 34156 | | |
| 2026-09-11 01:00 | 33919 | | |
| 2026-09-11 00:00 | 34337 | | |
| 2026-09-10 23:00 | 37469 | | |
| 2026-09-10 22:00 | 44862 | | |
| 2026-09-10 21:00 | 56131 | | |
| 2026-09-10 20:00 | 68119 | | |
| 2026-09-10 19:00 | 76356 | | |
| 2026-09-10 18:00 | 78569 | | |
| 2026-09-10 17:00 | 75319 | | |
| 2026-09-10 16:00 | 68075 | | |
| 2026-09-10 15:00 | 59094 | | |
| 2026-09-10 14:00 | 51281 | | |
| 2026-09-10 13:00 | 45850 | | |
| 2026-09-10 12:00 | 41725 | | |
| 2026-09-10 11:00 | 38375 | | |
| 2026-09-10 10:00 | 36525 | | |
| 2026-09-10 09:00 | 36631 | | |
| 2026-09-10 08:00 | 38481 | | |
| 2026-09-10 07:00 | 40638 | | |
| 2026-09-10 06:00 | 40594 | | |
| 2026-09-10 05:00 | 37587 | | |
| 2026-09-10 04:00 | 35087 | | |
| 2026-09-10 03:00 | 36900 | | |
| 2026-09-10 02:00 | 41469 | | |
| 2026-09-10 01:00 | 44944 | | |
| 2026-09-10 00:00 | 46775 | | |
| 2026-09-09 23:00 | 50081 | | |
| 2026-09-09 22:00 | 58856 | | |
| 2026-09-09 21:00 | 72062 | | |
| 2026-09-09 20:00 | 83412 | | |
| 2026-09-09 19:00 | 87981 | | |
| 2026-09-09 18:00 | 83050 | | |
| 2026-09-09 17:00 | 68862 | | |