COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-05-31 12:00 | 97425 | | |
| 2026-05-31 11:00 | 99056 | | |
| 2026-05-31 10:00 | 101287 | | |
| 2026-05-31 09:00 | 103881 | | |
| 2026-05-31 08:00 | 108019 | | |
| 2026-05-31 07:00 | 114656 | | |
| 2026-05-31 06:00 | 121731 | | |
| 2026-05-31 05:00 | 126325 | | |
| 2026-05-31 04:00 | 129262 | | |
| 2026-05-31 03:00 | 132725 | | |
| 2026-05-31 02:00 | 137206 | | |
| 2026-05-31 01:00 | 142081 | | |
| 2026-05-31 00:00 | 144569 | | |
| 2026-05-30 23:00 | 141456 | | |
| 2026-05-30 22:00 | 134706 | | |
| 2026-05-30 21:00 | 128256 | | |
| 2026-05-30 20:00 | 120350 | | |
| 2026-05-30 19:00 | 109894 | | |
| 2026-05-30 18:00 | 101638 | | |
| 2026-05-30 17:00 | 97650 | | |
| 2026-05-30 16:00 | 95862 | | |
| 2026-05-30 15:00 | 95669 | | |
| 2026-05-30 14:00 | 97188 | | |
| 2026-05-30 13:00 | 99944 | | |
| 2026-05-30 12:00 | 103806 | | |
| 2026-05-30 11:00 | 108263 | | |
| 2026-05-30 10:00 | 111669 | | |
| 2026-05-30 09:00 | 111719 | | |
| 2026-05-30 08:00 | 109275 | | |
| 2026-05-30 07:00 | 108956 | | |
| 2026-05-30 06:00 | 111537 | | |
| 2026-05-30 05:00 | 114044 | | |
| 2026-05-30 04:00 | 115975 | | |
| 2026-05-30 03:00 | 118725 | | |
| 2026-05-30 02:00 | 123725 | | |
| 2026-05-30 01:00 | 131363 | | |
| 2026-05-30 00:00 | 138681 | | |
| 2026-05-29 23:00 | 141044 | | |
| 2026-05-29 22:00 | 138494 | | |
| 2026-05-29 21:00 | 134713 | | |
| 2026-05-29 20:00 | 129062 | | |
| 2026-05-29 19:00 | 118656 | | |
| 2026-05-29 18:00 | 106506 | | |
| 2026-05-29 17:00 | 98600 | | |
| 2026-05-29 16:00 | 95944 | | |
| 2026-05-29 15:00 | 96263 | | |
| 2026-05-29 14:00 | 97831 | | |
| 2026-05-29 13:00 | 97656 | | |
| 2026-05-29 12:00 | 92444 | | |
| 2026-05-29 11:00 | 84450 | | |
| 2026-05-29 10:00 | 80075 | | |
| 2026-05-29 09:00 | 81069 | | |
| 2026-05-29 08:00 | 84750 | | |
| 2026-05-29 07:00 | 89544 | | |
| 2026-05-29 06:00 | 95138 | | |
| 2026-05-29 05:00 | 102869 | | |
| 2026-05-29 04:00 | 112987 | | |
| 2026-05-29 03:00 | 120963 | | |
| 2026-05-29 02:00 | 125375 | | |
| 2026-05-29 01:00 | 131238 | | |
| 2026-05-29 00:00 | 139588 | | |
| 2026-05-28 23:00 | 145531 | | |
| 2026-05-28 22:00 | 148019 | | |
| 2026-05-28 21:00 | 151963 | | |
| 2026-05-28 20:00 | 158344 | | |
| 2026-05-28 19:00 | 163119 | | |
| 2026-05-28 18:00 | 166713 | | |
| 2026-05-28 17:00 | 172106 | | |
| 2026-05-28 16:00 | 177650 | | |
| 2026-05-28 15:00 | 178912 | | |
| 2026-05-28 14:00 | 173062 | | |
| 2026-05-28 13:00 | 160606 | | |
| 2026-05-28 12:00 | 144912 | | |
| 2026-05-28 11:00 | 129387 | | |
| 2026-05-28 10:00 | 116150 | | |
| 2026-05-28 09:00 | 107619 | | |
| 2026-05-28 08:00 | 107188 | | |
| 2026-05-28 07:00 | 116100 | | |
| 2026-05-28 06:00 | 128956 | | |
| 2026-05-28 05:00 | 138694 | | |
| 2026-05-28 04:00 | 144831 | | |
| 2026-05-28 03:00 | 150037 | | |
| 2026-05-28 02:00 | 153162 | | |
| 2026-05-28 01:00 | 150838 | | |
| 2026-05-28 00:00 | 145869 | | |
| 2026-05-27 23:00 | 145256 | | |
| 2026-05-27 22:00 | 149750 | | |
| 2026-05-27 21:00 | 154969 | | |
| 2026-05-27 20:00 | 155869 | | |
| 2026-05-27 19:00 | 148575 | | |
| 2026-05-27 18:00 | 135500 | | |
| 2026-05-27 17:00 | 122881 | | |
| 2026-05-27 16:00 | 113144 | | |
| 2026-05-27 15:00 | 106188 | | |
| 2026-05-27 14:00 | 101112 | | |
| 2026-05-27 13:00 | 96162 | | |
| 2026-05-27 12:00 | 92388 | | |
| 2026-05-27 11:00 | 91806 | | |
| 2026-05-27 10:00 | 93775 | | |
| 2026-05-27 09:00 | 98069 | | |
| 2026-05-27 08:00 | 105319 | | |
| 2026-05-27 07:00 | 111044 | | |
| 2026-05-27 06:00 | 109200 | | |
| 2026-05-27 05:00 | 103856 | | |
| 2026-05-27 04:00 | 103425 | | |
| 2026-05-27 03:00 | 107394 | | |
| 2026-05-27 02:00 | 111862 | | |
| 2026-05-27 01:00 | 117938 | | |
| 2026-05-27 00:00 | 126106 | | |
| 2026-05-26 23:00 | 132250 | | |
| 2026-05-26 22:00 | 134956 | | |
| 2026-05-26 21:00 | 137262 | | |
| 2026-05-26 20:00 | 137156 | | |
| 2026-05-26 19:00 | 130281 | | |
| 2026-05-26 18:00 | 121594 | | |
| 2026-05-26 17:00 | 119931 | | |
| 2026-05-26 16:00 | 126500 | | |
| 2026-05-26 15:00 | 136656 | | |
| 2026-05-26 14:00 | 145031 | | |
| 2026-05-26 13:00 | 145650 | | |
| 2026-05-26 12:00 | 136425 | | |
| 2026-05-26 11:00 | 123356 | | |
| 2026-05-26 10:00 | 112725 | | |
| 2026-05-26 09:00 | 105475 | | |
| 2026-05-26 08:00 | 101194 | | |
| 2026-05-26 07:00 | 98987 | | |
| 2026-05-26 06:00 | 96456 | | |
| 2026-05-26 05:00 | 93706 | | |
| 2026-05-26 04:00 | 93812 | | |
| 2026-05-26 03:00 | 97506 | | |
| 2026-05-26 02:00 | 103331 | | |
| 2026-05-26 01:00 | 109556 | | |
| 2026-05-26 00:00 | 113963 | | |
| 2026-05-25 23:00 | 116112 | | |
| 2026-05-25 22:00 | 118669 | | |
| 2026-05-25 21:00 | 124081 | | |
| 2026-05-25 20:00 | 128019 | | |
| 2026-05-25 19:00 | 123581 | | |
| 2026-05-25 18:00 | 115031 | | |
| 2026-05-25 17:00 | 112050 | | |
| 2026-05-25 16:00 | 113769 | | |
| 2026-05-25 15:00 | 113881 | | |
| 2026-05-25 14:00 | 111700 | | |
| 2026-05-25 13:00 | 108825 | | |
| 2026-05-25 12:00 | 104537 | | |
| 2026-05-25 11:00 | 98306 | | |
| 2026-05-25 10:00 | 91662 | | |
| 2026-05-25 09:00 | 87688 | | |
| 2026-05-25 08:00 | 89906 | | |
| 2026-05-25 07:00 | 98562 | | |
| 2026-05-25 06:00 | 108250 | | |
| 2026-05-25 05:00 | 113656 | | |
| 2026-05-25 04:00 | 115544 | | |
| 2026-05-25 03:00 | 116737 | | |
| 2026-05-25 02:00 | 117519 | | |
| 2026-05-25 01:00 | 119325 | | |
| 2026-05-25 00:00 | 126725 | | |
| 2026-05-24 23:00 | 140744 | | |
| 2026-05-24 22:00 | 155806 | | |
| 2026-05-24 21:00 | 165887 | | |
| 2026-05-24 20:00 | 166856 | | |
| 2026-05-24 19:00 | 155356 | | |
| 2026-05-24 18:00 | 133363 | | |
| 2026-05-24 17:00 | 109056 | | |
| 2026-05-24 16:00 | 89856 | | |
| 2026-05-24 15:00 | 78300 | | |
| 2026-05-24 14:00 | 72200 | | |
| 2026-05-24 13:00 | 67881 | | |
| 2026-05-24 12:00 | 64706 | | |
| 2026-05-24 11:00 | 63794 | | |
| 2026-05-24 10:00 | 64556 | | |
| 2026-05-24 09:00 | 66169 | | |
| 2026-05-24 08:00 | 70550 | | |
| 2026-05-24 07:00 | 79888 | | |
| 2026-05-24 06:00 | 91081 | | |
| 2026-05-24 05:00 | 98806 | | |
| 2026-05-24 04:00 | 102381 | | |
| 2026-05-24 03:00 | 103475 | | |
| 2026-05-24 02:00 | 102463 | | |
| 2026-05-24 01:00 | 101787 | | |
| 2026-05-24 00:00 | 105806 | | |
| 2026-05-23 23:00 | 113125 | | |
| 2026-05-23 22:00 | 118331 | | |
| 2026-05-23 21:00 | 120825 | | |
| 2026-05-23 20:00 | 120925 | | |
| 2026-05-23 19:00 | 114400 | | |
| 2026-05-23 18:00 | 100537 | | |
| 2026-05-23 17:00 | 86456 | | |
| 2026-05-23 16:00 | 78194 | | |
| 2026-05-23 15:00 | 75763 | | |
| 2026-05-23 14:00 | 76556 | | |
| 2026-05-23 13:00 | 77625 | | |
| 2026-05-23 12:00 | 77181 | | |
| 2026-05-23 11:00 | 75550 | | |
| 2026-05-23 10:00 | 74431 | | |
| 2026-05-23 09:00 | 76494 | | |
| 2026-05-23 08:00 | 84062 | | |
| 2026-05-23 07:00 | 97237 | | |
| 2026-05-23 06:00 | 111725 | | |
| 2026-05-23 05:00 | 121263 | | |
| 2026-05-23 04:00 | 126444 | | |
| 2026-05-23 03:00 | 133606 | | |
| 2026-05-23 02:00 | 144219 | | |
| 2026-05-23 01:00 | 154262 | | |
| 2026-05-23 00:00 | 161238 | | |
| 2026-05-22 23:00 | 165738 | | |
| 2026-05-22 22:00 | 169944 | | |
| 2026-05-22 21:00 | 174475 | | |
| 2026-05-22 20:00 | 174656 | | |
| 2026-05-22 19:00 | 166044 | | |
| 2026-05-22 18:00 | 151325 | | |
| 2026-05-22 17:00 | 136444 | | |
| 2026-05-22 16:00 | 124550 | | |
| 2026-05-22 15:00 | 116200 | | |
| 2026-05-22 14:00 | 110775 | | |
| 2026-05-22 13:00 | 106481 | | |
| 2026-05-22 12:00 | 102581 | | |
| 2026-05-22 11:00 | 99150 | | |
| 2026-05-22 10:00 | 95750 | | |
| 2026-05-22 09:00 | 94375 | | |
| 2026-05-22 08:00 | 97519 | | |
| 2026-05-22 07:00 | 102725 | | |
| 2026-05-22 06:00 | 104713 | | |
| 2026-05-22 05:00 | 103369 | | |
| 2026-05-22 04:00 | 104588 | | |
| 2026-05-22 03:00 | 111987 | | |
| 2026-05-22 02:00 | 124394 | | |
| 2026-05-22 01:00 | 138475 | | |
| 2026-05-22 00:00 | 150200 | | |
| 2026-05-21 23:00 | 157156 | | |
| 2026-05-21 22:00 | 161675 | | |
| 2026-05-21 21:00 | 167731 | | |
| 2026-05-21 20:00 | 170825 | | |
| 2026-05-21 19:00 | 163387 | | |
| 2026-05-21 18:00 | 149113 | | |
| 2026-05-21 17:00 | 136650 | | |
| 2026-05-21 16:00 | 127994 | | |
| 2026-05-21 15:00 | 120094 | | |
| 2026-05-21 14:00 | 110294 | | |
| 2026-05-21 13:00 | 100606 | | |
| 2026-05-21 12:00 | 95619 | | |
| 2026-05-21 11:00 | 95906 | | |
| 2026-05-21 10:00 | 99269 | | |
| 2026-05-21 09:00 | 104806 | | |
| 2026-05-21 08:00 | 111400 | | |
| 2026-05-21 07:00 | 115731 | | |
| 2026-05-21 06:00 | 113806 | | |
| 2026-05-21 05:00 | 106381 | | |
| 2026-05-21 04:00 | 100438 | | |
| 2026-05-21 03:00 | 102263 | | |
| 2026-05-21 02:00 | 114675 | | |
| 2026-05-21 01:00 | 135919 | | |
| 2026-05-21 00:00 | 155844 | | |
| 2026-05-20 23:00 | 166025 | | |
| 2026-05-20 22:00 | 170875 | | |
| 2026-05-20 21:00 | 174575 | | |
| 2026-05-20 20:00 | 171613 | | |
| 2026-05-20 19:00 | 158825 | | |
| 2026-05-20 18:00 | 140262 | | |
| 2026-05-20 17:00 | 121969 | | |