COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-03-18 16:00 | 83025 | | |
| 2026-03-18 15:00 | 79806 | | |
| 2026-03-18 14:00 | 84150 | | |
| 2026-03-18 13:00 | 88319 | | |
| 2026-03-18 12:00 | 91213 | | |
| 2026-03-18 11:00 | 94787 | | |
| 2026-03-18 10:00 | 100562 | | |
| 2026-03-18 09:00 | 110938 | | |
| 2026-03-18 08:00 | 121500 | | |
| 2026-03-18 07:00 | 120319 | | |
| 2026-03-18 06:00 | 103950 | | |
| 2026-03-18 05:00 | 83875 | | |
| 2026-03-18 04:00 | 73362 | | |
| 2026-03-18 03:00 | 74519 | | |
| 2026-03-18 02:00 | 82019 | | |
| 2026-03-18 01:00 | 93112 | | |
| 2026-03-18 00:00 | 107675 | | |
| 2026-03-17 23:00 | 123831 | | |
| 2026-03-17 22:00 | 138431 | | |
| 2026-03-17 21:00 | 148713 | | |
| 2026-03-17 20:00 | 152175 | | |
| 2026-03-17 19:00 | 145781 | | |
| 2026-03-17 18:00 | 126819 | | |
| 2026-03-17 17:00 | 101025 | | |
| 2026-03-17 16:00 | 81319 | | |
| 2026-03-17 15:00 | 71638 | | |
| 2026-03-17 14:00 | 68269 | | |
| 2026-03-17 13:00 | 71656 | | |
| 2026-03-17 12:00 | 81494 | | |
| 2026-03-17 11:00 | 92075 | | |
| 2026-03-17 10:00 | 100312 | | |
| 2026-03-17 09:00 | 108031 | | |
| 2026-03-17 08:00 | 114112 | | |
| 2026-03-17 07:00 | 114300 | | |
| 2026-03-17 06:00 | 108519 | | |
| 2026-03-17 05:00 | 101162 | | |
| 2026-03-17 04:00 | 96325 | | |
| 2026-03-17 03:00 | 94769 | | |
| 2026-03-17 02:00 | 94625 | | |
| 2026-03-17 01:00 | 95100 | | |
| 2026-03-17 00:00 | 98050 | | |
| 2026-03-16 23:00 | 104737 | | |
| 2026-03-16 22:00 | 112812 | | |
| 2026-03-16 21:00 | 118950 | | |
| 2026-03-16 20:00 | 120125 | | |
| 2026-03-16 19:00 | 112850 | | |
| 2026-03-16 18:00 | 98200 | | |
| 2026-03-16 17:00 | 83925 | | |
| 2026-03-16 16:00 | 78156 | | |
| 2026-03-16 15:00 | 82781 | | |
| 2026-03-16 14:00 | 92225 | | |
| 2026-03-16 13:00 | 100537 | | |
| 2026-03-16 12:00 | 108294 | | |
| 2026-03-16 11:00 | 117925 | | |
| 2026-03-16 10:00 | 127594 | | |
| 2026-03-16 09:00 | 133800 | | |
| 2026-03-16 08:00 | 134531 | | |
| 2026-03-16 07:00 | 129887 | | |
| 2026-03-16 06:00 | 121681 | | |
| 2026-03-16 05:00 | 112294 | | |
| 2026-03-16 04:00 | 105194 | | |
| 2026-03-16 03:00 | 102844 | | |
| 2026-03-16 02:00 | 103331 | | |
| 2026-03-16 01:00 | 103787 | | |
| 2026-03-16 00:00 | 107388 | | |
| 2026-03-15 23:00 | 120312 | | |
| 2026-03-15 22:00 | 140319 | | |
| 2026-03-15 21:00 | 157244 | | |
| 2026-03-15 20:00 | 162519 | | |
| 2026-03-15 19:00 | 153469 | | |
| 2026-03-15 18:00 | 135075 | | |
| 2026-03-15 17:00 | 116919 | | |
| 2026-03-15 16:00 | 105300 | | |
| 2026-03-15 15:00 | 100481 | | |
| 2026-03-15 14:00 | 100294 | | |
| 2026-03-15 13:00 | 103931 | | |
| 2026-03-15 12:00 | 111237 | | |
| 2026-03-15 11:00 | 121375 | | |
| 2026-03-15 10:00 | 133256 | | |
| 2026-03-15 09:00 | 141600 | | |
| 2026-03-15 08:00 | 137562 | | |
| 2026-03-15 07:00 | 120350 | | |
| 2026-03-15 06:00 | 100606 | | |
| 2026-03-15 05:00 | 89169 | | |
| 2026-03-15 04:00 | 88519 | | |
| 2026-03-15 03:00 | 95331 | | |
| 2026-03-15 02:00 | 107275 | | |
| 2026-03-15 01:00 | 124269 | | |
| 2026-03-15 00:00 | 141619 | | |
| 2026-03-14 23:00 | 150906 | | |
| 2026-03-14 22:00 | 150719 | | |
| 2026-03-14 21:00 | 144825 | | |
| 2026-03-14 20:00 | 132387 | | |
| 2026-03-14 19:00 | 110062 | | |
| 2026-03-14 18:00 | 83019 | | |
| 2026-03-14 17:00 | 63812 | | |
| 2026-03-14 16:00 | 57281 | | |
| 2026-03-14 15:00 | 58631 | | |
| 2026-03-14 14:00 | 63612 | | |
| 2026-03-14 13:00 | 70300 | | |
| 2026-03-14 12:00 | 77775 | | |
| 2026-03-14 11:00 | 87138 | | |
| 2026-03-14 10:00 | 99463 | | |
| 2026-03-14 09:00 | 113438 | | |
| 2026-03-14 08:00 | 126069 | | |
| 2026-03-14 07:00 | 134531 | | |
| 2026-03-14 06:00 | 137475 | | |
| 2026-03-14 05:00 | 136150 | | |
| 2026-03-14 04:00 | 133088 | | |
| 2026-03-14 03:00 | 130312 | | |
| 2026-03-14 02:00 | 130787 | | |
| 2026-03-14 01:00 | 135056 | | |
| 2026-03-14 00:00 | 140000 | | |
| 2026-03-13 23:00 | 145456 | | |
| 2026-03-13 22:00 | 153356 | | |
| 2026-03-13 21:00 | 161469 | | |
| 2026-03-13 20:00 | 163456 | | |
| 2026-03-13 19:00 | 154606 | | |
| 2026-03-13 18:00 | 137131 | | |
| 2026-03-13 17:00 | 119131 | | |
| 2026-03-13 16:00 | 107644 | | |
| 2026-03-13 15:00 | 104669 | | |
| 2026-03-13 14:00 | 108481 | | |
| 2026-03-13 13:00 | 114856 | | |
| 2026-03-13 12:00 | 120006 | | |
| 2026-03-13 11:00 | 124431 | | |
| 2026-03-13 10:00 | 131006 | | |
| 2026-03-13 09:00 | 139488 | | |
| 2026-03-13 08:00 | 146494 | | |
| 2026-03-13 07:00 | 149700 | | |
| 2026-03-13 06:00 | 149669 | | |
| 2026-03-13 05:00 | 149113 | | |
| 2026-03-13 04:00 | 149556 | | |
| 2026-03-13 03:00 | 150606 | | |
| 2026-03-13 02:00 | 152506 | | |
| 2026-03-13 01:00 | 154588 | | |
| 2026-03-13 00:00 | 154769 | | |
| 2026-03-12 23:00 | 152944 | | |
| 2026-03-12 22:00 | 150375 | | |
| 2026-03-12 21:00 | 146900 | | |
| 2026-03-12 20:00 | 141769 | | |
| 2026-03-12 19:00 | 134744 | | |
| 2026-03-12 18:00 | 125319 | | |
| 2026-03-12 17:00 | 114675 | | |
| 2026-03-12 16:00 | 107037 | | |
| 2026-03-12 15:00 | 104525 | | |
| 2026-03-12 14:00 | 104787 | | |
| 2026-03-12 13:00 | 105381 | | |
| 2026-03-12 12:00 | 105256 | | |
| 2026-03-12 11:00 | 104750 | | |
| 2026-03-12 10:00 | 106306 | | |
| 2026-03-12 09:00 | 110531 | | |
| 2026-03-12 08:00 | 114388 | | |
| 2026-03-12 07:00 | 116506 | | |
| 2026-03-12 06:00 | 118425 | | |
| 2026-03-12 05:00 | 120319 | | |
| 2026-03-12 04:00 | 121744 | | |
| 2026-03-12 03:00 | 124162 | | |
| 2026-03-12 02:00 | 126987 | | |
| 2026-03-12 01:00 | 126394 | | |
| 2026-03-12 00:00 | 122737 | | |
| 2026-03-11 23:00 | 121294 | | |
| 2026-03-11 22:00 | 124306 | | |
| 2026-03-11 21:00 | 128581 | | |
| 2026-03-11 20:00 | 129306 | | |
| 2026-03-11 19:00 | 125331 | | |
| 2026-03-11 18:00 | 121206 | | |
| 2026-03-11 17:00 | 121025 | | |
| 2026-03-11 16:00 | 123019 | | |
| 2026-03-11 15:00 | 125237 | | |
| 2026-03-11 14:00 | 129419 | | |
| 2026-03-11 13:00 | 134137 | | |
| 2026-03-11 12:00 | 135325 | | |
| 2026-03-11 11:00 | 133000 | | |
| 2026-03-11 10:00 | 129106 | | |
| 2026-03-11 09:00 | 125787 | | |
| 2026-03-11 08:00 | 124881 | | |
| 2026-03-11 07:00 | 124987 | | |
| 2026-03-11 06:00 | 124581 | | |
| 2026-03-11 05:00 | 125250 | | |
| 2026-03-11 04:00 | 128781 | | |
| 2026-03-11 03:00 | 133863 | | |
| 2026-03-11 02:00 | 136938 | | |
| 2026-03-11 01:00 | 136081 | | |
| 2026-03-11 00:00 | 132838 | | |
| 2026-03-10 23:00 | 130006 | | |
| 2026-03-10 22:00 | 129188 | | |
| 2026-03-10 21:00 | 130725 | | |
| 2026-03-10 20:00 | 132488 | | |
| 2026-03-10 19:00 | 129512 | | |
| 2026-03-10 18:00 | 119069 | | |
| 2026-03-10 17:00 | 104406 | | |
| 2026-03-10 16:00 | 92294 | | |
| 2026-03-10 15:00 | 87631 | | |
| 2026-03-10 14:00 | 90006 | | |
| 2026-03-10 13:00 | 96650 | | |
| 2026-03-10 12:00 | 106931 | | |
| 2026-03-10 11:00 | 120188 | | |
| 2026-03-10 10:00 | 132463 | | |
| 2026-03-10 09:00 | 139556 | | |
| 2026-03-10 08:00 | 141863 | | |
| 2026-03-10 07:00 | 143037 | | |
| 2026-03-10 06:00 | 143025 | | |
| 2026-03-10 05:00 | 139794 | | |
| 2026-03-10 04:00 | 137225 | | |
| 2026-03-10 03:00 | 139825 | | |
| 2026-03-10 02:00 | 145300 | | |
| 2026-03-10 01:00 | 150162 | | |
| 2026-03-10 00:00 | 154787 | | |
| 2026-03-09 23:00 | 159238 | | |
| 2026-03-09 22:00 | 161706 | | |
| 2026-03-09 21:00 | 162637 | | |
| 2026-03-09 20:00 | 161231 | | |
| 2026-03-09 19:00 | 151000 | | |
| 2026-03-09 18:00 | 129969 | | |
| 2026-03-09 17:00 | 108256 | | |
| 2026-03-09 16:00 | 95769 | | |
| 2026-03-09 15:00 | 91250 | | |
| 2026-03-09 14:00 | 89919 | | |
| 2026-03-09 13:00 | 92544 | | |
| 2026-03-09 12:00 | 101763 | | |
| 2026-03-09 11:00 | 116263 | | |
| 2026-03-09 10:00 | 132394 | | |
| 2026-03-09 09:00 | 145450 | | |
| 2026-03-09 08:00 | 150688 | | |
| 2026-03-09 07:00 | 147706 | | |
| 2026-03-09 06:00 | 138175 | | |
| 2026-03-09 05:00 | 124487 | | |
| 2026-03-09 04:00 | 112744 | | |
| 2026-03-09 03:00 | 107369 | | |
| 2026-03-09 02:00 | 108369 | | |
| 2026-03-09 01:00 | 115969 | | |
| 2026-03-09 00:00 | 129919 | | |
| 2026-03-08 23:00 | 145481 | | |
| 2026-03-08 22:00 | 156119 | | |
| 2026-03-08 21:00 | 158250 | | |
| 2026-03-08 20:00 | 148894 | | |
| 2026-03-08 19:00 | 127287 | | |
| 2026-03-08 18:00 | 101731 | | |
| 2026-03-08 17:00 | 82831 | | |
| 2026-03-08 16:00 | 73244 | | |
| 2026-03-08 15:00 | 71131 | | |
| 2026-03-08 14:00 | 73969 | | |
| 2026-03-08 13:00 | 77856 | | |
| 2026-03-08 12:00 | 80294 | | |
| 2026-03-08 11:00 | 82206 | | |
| 2026-03-08 10:00 | 86356 | | |
| 2026-03-08 09:00 | 93481 | | |
| 2026-03-08 08:00 | 99144 | | |
| 2026-03-08 07:00 | 99781 | | |
| 2026-03-08 06:00 | 99450 | | |
| 2026-03-08 05:00 | 102231 | | |
| 2026-03-08 04:00 | 107344 | | |
| 2026-03-08 03:00 | 114519 | | |
| 2026-03-08 01:00 | 120725 | | |
| 2026-03-08 00:00 | 120206 | | |
| 2026-03-07 23:00 | 115037 | | |
| 2026-03-07 22:00 | 112750 | | |
| 2026-03-07 21:00 | 115763 | | |
| 2026-03-07 20:00 | 119025 | | |
| 2026-03-07 19:00 | 115713 | | |
| 2026-03-07 18:00 | 105225 | | |
| 2026-03-07 18:00 | 92888 | | |
| 2026-03-07 17:00 | 82919 | | |