COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-09-23 05:00 | 45119 | | |
| 2026-09-23 04:00 | 38525 | | |
| 2026-09-23 03:00 | 37519 | | |
| 2026-09-23 02:00 | 40800 | | |
| 2026-09-23 01:00 | 46594 | | |
| 2026-09-23 00:00 | 52281 | | |
| 2026-09-22 23:00 | 55475 | | |
| 2026-09-22 22:00 | 57225 | | |
| 2026-09-22 21:00 | 59769 | | |
| 2026-09-22 20:00 | 63425 | | |
| 2026-09-22 19:00 | 64763 | | |
| 2026-09-22 18:00 | 58594 | | |
| 2026-09-22 17:00 | 47144 | | |
| 2026-09-22 16:00 | 39062 | | |
| 2026-09-22 15:00 | 36994 | | |
| 2026-09-22 14:00 | 37050 | | |
| 2026-09-22 13:00 | 37362 | | |
| 2026-09-22 12:00 | 38006 | | |
| 2026-09-22 11:00 | 38181 | | |
| 2026-09-22 10:00 | 38837 | | |
| 2026-09-22 09:00 | 42494 | | |
| 2026-09-22 08:00 | 49150 | | |
| 2026-09-22 07:00 | 55138 | | |
| 2026-09-22 06:00 | 55237 | | |
| 2026-09-22 05:00 | 49269 | | |
| 2026-09-22 04:00 | 43925 | | |
| 2026-09-22 03:00 | 43013 | | |
| 2026-09-22 02:00 | 44881 | | |
| 2026-09-22 01:00 | 47862 | | |
| 2026-09-22 00:00 | 50938 | | |
| 2026-09-21 23:00 | 53581 | | |
| 2026-09-21 22:00 | 55712 | | |
| 2026-09-21 21:00 | 58419 | | |
| 2026-09-21 20:00 | 63631 | | |
| 2026-09-21 19:00 | 69506 | | |
| 2026-09-21 18:00 | 70919 | | |
| 2026-09-21 17:00 | 65881 | | |
| 2026-09-21 16:00 | 57294 | | |
| 2026-09-21 15:00 | 49900 | | |
| 2026-09-21 14:00 | 45931 | | |
| 2026-09-21 13:00 | 43600 | | |
| 2026-09-21 12:00 | 41337 | | |
| 2026-09-21 11:00 | 39275 | | |
| 2026-09-21 10:00 | 37362 | | |
| 2026-09-21 09:00 | 36656 | | |
| 2026-09-21 08:00 | 38244 | | |
| 2026-09-21 07:00 | 39975 | | |
| 2026-09-21 06:00 | 39450 | | |
| 2026-09-21 05:00 | 37725 | | |
| 2026-09-21 04:00 | 36913 | | |
| 2026-09-21 03:00 | 37956 | | |
| 2026-09-21 02:00 | 40987 | | |
| 2026-09-21 01:00 | 45156 | | |
| 2026-09-21 00:00 | 49669 | | |
| 2026-09-20 23:00 | 55456 | | |
| 2026-09-20 22:00 | 63237 | | |
| 2026-09-20 21:00 | 71056 | | |
| 2026-09-20 20:00 | 76456 | | |
| 2026-09-20 19:00 | 78281 | | |
| 2026-09-20 18:00 | 75681 | | |
| 2026-09-20 17:00 | 69088 | | |
| 2026-09-20 16:00 | 59794 | | |
| 2026-09-20 15:00 | 49038 | | |
| 2026-09-20 14:00 | 39950 | | |
| 2026-09-20 13:00 | 35250 | | |
| 2026-09-20 12:00 | 34500 | | |
| 2026-09-20 11:00 | 35931 | | |
| 2026-09-20 10:00 | 37188 | | |
| 2026-09-20 09:00 | 37175 | | |
| 2026-09-20 08:00 | 37419 | | |
| 2026-09-20 07:00 | 38581 | | |
| 2026-09-20 06:00 | 39244 | | |
| 2026-09-20 05:00 | 38475 | | |
| 2026-09-20 04:00 | 37337 | | |
| 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 | | |