COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-07-21 04:00 | 56800 | | |
| 2026-07-21 03:00 | 57775 | | |
| 2026-07-21 02:00 | 60206 | | |
| 2026-07-21 01:00 | 65294 | | |
| 2026-07-21 00:00 | 74350 | | |
| 2026-07-20 23:00 | 87994 | | |
| 2026-07-20 22:00 | 104019 | | |
| 2026-07-20 21:00 | 116719 | | |
| 2026-07-20 20:00 | 121494 | | |
| 2026-07-20 19:00 | 119237 | | |
| 2026-07-20 18:00 | 116600 | | |
| 2026-07-20 17:00 | 118987 | | |
| 2026-07-20 16:00 | 122069 | | |
| 2026-07-20 15:00 | 118056 | | |
| 2026-07-20 14:00 | 107750 | | |
| 2026-07-20 13:00 | 96881 | | |
| 2026-07-20 12:00 | 87294 | | |
| 2026-07-20 11:00 | 79325 | | |
| 2026-07-20 10:00 | 74812 | | |
| 2026-07-20 09:00 | 72950 | | |
| 2026-07-20 08:00 | 70031 | | |
| 2026-07-20 07:00 | 64963 | | |
| 2026-07-20 06:00 | 59606 | | |
| 2026-07-20 05:00 | 55775 | | |
| 2026-07-20 04:00 | 54931 | | |
| 2026-07-20 03:00 | 58081 | | |
| 2026-07-20 02:00 | 65263 | | |
| 2026-07-20 01:00 | 74888 | | |
| 2026-07-20 00:00 | 85531 | | |
| 2026-07-19 23:00 | 97875 | | |
| 2026-07-19 22:00 | 111287 | | |
| 2026-07-19 21:00 | 123200 | | |
| 2026-07-19 20:00 | 131300 | | |
| 2026-07-19 19:00 | 133081 | | |
| 2026-07-19 18:00 | 129106 | | |
| 2026-07-19 17:00 | 123444 | | |
| 2026-07-19 16:00 | 117369 | | |
| 2026-07-19 15:00 | 109906 | | |
| 2026-07-19 14:00 | 101825 | | |
| 2026-07-19 13:00 | 94000 | | |
| 2026-07-19 12:00 | 86925 | | |
| 2026-07-19 11:00 | 81162 | | |
| 2026-07-19 10:00 | 75938 | | |
| 2026-07-19 09:00 | 69994 | | |
| 2026-07-19 08:00 | 63250 | | |
| 2026-07-19 07:00 | 57344 | | |
| 2026-07-19 06:00 | 54100 | | |
| 2026-07-19 05:00 | 53325 | | |
| 2026-07-19 04:00 | 54275 | | |
| 2026-07-19 03:00 | 57200 | | |
| 2026-07-19 02:00 | 61944 | | |
| 2026-07-19 01:00 | 67706 | | |
| 2026-07-19 00:00 | 74356 | | |
| 2026-07-18 23:00 | 82537 | | |
| 2026-07-18 22:00 | 92494 | | |
| 2026-07-18 21:00 | 103200 | | |
| 2026-07-18 20:00 | 113100 | | |
| 2026-07-18 19:00 | 120550 | | |
| 2026-07-18 18:00 | 123112 | | |
| 2026-07-18 17:00 | 119975 | | |
| 2026-07-18 16:00 | 114294 | | |
| 2026-07-18 15:00 | 108963 | | |
| 2026-07-18 14:00 | 102544 | | |
| 2026-07-18 13:00 | 92444 | | |
| 2026-07-18 12:00 | 80575 | | |
| 2026-07-18 11:00 | 72237 | | |
| 2026-07-18 10:00 | 67981 | | |
| 2026-07-18 09:00 | 62962 | | |
| 2026-07-18 08:00 | 56688 | | |
| 2026-07-18 07:00 | 53681 | | |
| 2026-07-18 06:00 | 54381 | | |
| 2026-07-18 05:00 | 55775 | | |
| 2026-07-18 04:00 | 57544 | | |
| 2026-07-18 03:00 | 60606 | | |
| 2026-07-18 02:00 | 64138 | | |
| 2026-07-18 01:00 | 67925 | | |
| 2026-07-18 00:00 | 74775 | | |
| 2026-07-17 23:00 | 86394 | | |
| 2026-07-17 22:00 | 99744 | | |
| 2026-07-17 21:00 | 111456 | | |
| 2026-07-17 20:00 | 120644 | | |
| 2026-07-17 19:00 | 125662 | | |
| 2026-07-17 18:00 | 125062 | | |
| 2026-07-17 17:00 | 121019 | | |
| 2026-07-17 16:00 | 116744 | | |
| 2026-07-17 15:00 | 113444 | | |
| 2026-07-17 14:00 | 109763 | | |
| 2026-07-17 13:00 | 102037 | | |
| 2026-07-17 12:00 | 90025 | | |
| 2026-07-17 11:00 | 79469 | | |
| 2026-07-17 10:00 | 73025 | | |
| 2026-07-17 09:00 | 67037 | | |
| 2026-07-17 08:00 | 60456 | | |
| 2026-07-17 07:00 | 56106 | | |
| 2026-07-17 06:00 | 53987 | | |
| 2026-07-17 05:00 | 52337 | | |
| 2026-07-17 04:00 | 51450 | | |
| 2026-07-17 03:00 | 52337 | | |
| 2026-07-17 02:00 | 55862 | | |
| 2026-07-17 01:00 | 62581 | | |
| 2026-07-17 00:00 | 71037 | | |
| 2026-07-16 23:00 | 78550 | | |
| 2026-07-16 22:00 | 83931 | | |
| 2026-07-16 21:00 | 88031 | | |
| 2026-07-16 20:00 | 92100 | | |
| 2026-07-16 19:00 | 95556 | | |
| 2026-07-16 18:00 | 96100 | | |
| 2026-07-16 17:00 | 94200 | | |
| 2026-07-16 16:00 | 94281 | | |
| 2026-07-16 15:00 | 98250 | | |
| 2026-07-16 14:00 | 101600 | | |
| 2026-07-16 13:00 | 97850 | | |
| 2026-07-16 12:00 | 87638 | | |
| 2026-07-16 11:00 | 78537 | | |
| 2026-07-16 10:00 | 73112 | | |
| 2026-07-16 09:00 | 67912 | | |
| 2026-07-16 08:00 | 61438 | | |
| 2026-07-16 07:00 | 54169 | | |
| 2026-07-16 06:00 | 47256 | | |
| 2026-07-16 05:00 | 43581 | | |
| 2026-07-16 04:00 | 44862 | | |
| 2026-07-16 03:00 | 49369 | | |
| 2026-07-16 02:00 | 55569 | | |
| 2026-07-16 01:00 | 64206 | | |
| 2026-07-16 00:00 | 75875 | | |
| 2026-07-15 23:00 | 89894 | | |
| 2026-07-15 22:00 | 105862 | | |
| 2026-07-15 21:00 | 122713 | | |
| 2026-07-15 20:00 | 136369 | | |
| 2026-07-15 19:00 | 143637 | | |
| 2026-07-15 18:00 | 146800 | | |
| 2026-07-15 17:00 | 150406 | | |
| 2026-07-15 16:00 | 154006 | | |
| 2026-07-15 15:00 | 152606 | | |
| 2026-07-15 14:00 | 143169 | | |
| 2026-07-15 13:00 | 126475 | | |
| 2026-07-15 12:00 | 108888 | | |
| 2026-07-15 11:00 | 97525 | | |
| 2026-07-15 10:00 | 90031 | | |
| 2026-07-15 09:00 | 80819 | | |
| 2026-07-15 08:00 | 70606 | | |
| 2026-07-15 07:00 | 61231 | | |
| 2026-07-15 06:00 | 52438 | | |
| 2026-07-15 05:00 | 45625 | | |
| 2026-07-15 04:00 | 42500 | | |
| 2026-07-15 03:00 | 42800 | | |
| 2026-07-15 02:00 | 45950 | | |
| 2026-07-15 01:00 | 52006 | | |
| 2026-07-15 00:00 | 61256 | | |
| 2026-07-14 23:00 | 73981 | | |
| 2026-07-14 22:00 | 91544 | | |
| 2026-07-14 21:00 | 113706 | | |
| 2026-07-14 20:00 | 133356 | | |
| 2026-07-14 19:00 | 141662 | | |
| 2026-07-14 18:00 | 138037 | | |
| 2026-07-14 17:00 | 129781 | | |
| 2026-07-14 16:00 | 124037 | | |
| 2026-07-14 15:00 | 121537 | | |
| 2026-07-14 14:00 | 117994 | | |
| 2026-07-14 13:00 | 111169 | | |
| 2026-07-14 12:00 | 103106 | | |
| 2026-07-14 11:00 | 96231 | | |
| 2026-07-14 10:00 | 90744 | | |
| 2026-07-14 09:00 | 84744 | | |
| 2026-07-14 08:00 | 76938 | | |
| 2026-07-14 07:00 | 68263 | | |
| 2026-07-14 06:00 | 60125 | | |
| 2026-07-14 05:00 | 54212 | | |
| 2026-07-14 04:00 | 52081 | | |
| 2026-07-14 03:00 | 53362 | | |
| 2026-07-14 02:00 | 57069 | | |
| 2026-07-14 01:00 | 63856 | | |
| 2026-07-14 00:00 | 75781 | | |
| 2026-07-13 23:00 | 94081 | | |
| 2026-07-13 22:00 | 116294 | | |
| 2026-07-13 21:00 | 137281 | | |
| 2026-07-13 20:00 | 154319 | | |
| 2026-07-13 19:00 | 166894 | | |
| 2026-07-13 18:00 | 172669 | | |
| 2026-07-13 17:00 | 169675 | | |
| 2026-07-13 16:00 | 160725 | | |
| 2026-07-13 15:00 | 151144 | | |
| 2026-07-13 14:00 | 143662 | | |
| 2026-07-13 13:00 | 137656 | | |
| 2026-07-13 12:00 | 131387 | | |
| 2026-07-13 11:00 | 123931 | | |
| 2026-07-13 10:00 | 114688 | | |
| 2026-07-13 09:00 | 103263 | | |
| 2026-07-13 08:00 | 92306 | | |
| 2026-07-13 07:00 | 84669 | | |
| 2026-07-13 06:00 | 78756 | | |
| 2026-07-13 05:00 | 73231 | | |
| 2026-07-13 04:00 | 70206 | | |
| 2026-07-13 03:00 | 71019 | | |
| 2026-07-13 02:00 | 74875 | | |
| 2026-07-13 01:00 | 81519 | | |
| 2026-07-13 00:00 | 90775 | | |
| 2026-07-12 23:00 | 101206 | | |
| 2026-07-12 22:00 | 112731 | | |
| 2026-07-12 21:00 | 125388 | | |
| 2026-07-12 20:00 | 134725 | | |
| 2026-07-12 19:00 | 135656 | | |
| 2026-07-12 18:00 | 129338 | | |
| 2026-07-12 17:00 | 121044 | | |
| 2026-07-12 16:00 | 114231 | | |
| 2026-07-12 15:00 | 109200 | | |
| 2026-07-12 14:00 | 104513 | | |
| 2026-07-12 13:00 | 99256 | | |
| 2026-07-12 12:00 | 94388 | | |
| 2026-07-12 11:00 | 90938 | | |
| 2026-07-12 10:00 | 87975 | | |
| 2026-07-12 09:00 | 83037 | | |
| 2026-07-12 08:00 | 74919 | | |
| 2026-07-12 07:00 | 65650 | | |
| 2026-07-12 06:00 | 58950 | | |
| 2026-07-12 05:00 | 57663 | | |
| 2026-07-12 04:00 | 61744 | | |
| 2026-07-12 03:00 | 68206 | | |
| 2026-07-12 02:00 | 75006 | | |
| 2026-07-12 01:00 | 83394 | | |
| 2026-07-12 00:00 | 94794 | | |
| 2026-07-11 23:00 | 108656 | | |
| 2026-07-11 22:00 | 124375 | | |
| 2026-07-11 21:00 | 141613 | | |
| 2026-07-11 20:00 | 156694 | | |
| 2026-07-11 19:00 | 163931 | | |
| 2026-07-11 18:00 | 162356 | | |
| 2026-07-11 17:00 | 154919 | | |
| 2026-07-11 16:00 | 144925 | | |
| 2026-07-11 15:00 | 136256 | | |
| 2026-07-11 14:00 | 130150 | | |
| 2026-07-11 13:00 | 123881 | | |
| 2026-07-11 12:00 | 116800 | | |
| 2026-07-11 11:00 | 111638 | | |
| 2026-07-11 10:00 | 107800 | | |
| 2026-07-11 09:00 | 101825 | | |
| 2026-07-11 08:00 | 93444 | | |
| 2026-07-11 07:00 | 83606 | | |
| 2026-07-11 06:00 | 73050 | | |
| 2026-07-11 05:00 | 65031 | | |
| 2026-07-11 04:00 | 61825 | | |
| 2026-07-11 03:00 | 62450 | | |
| 2026-07-11 02:00 | 66200 | | |
| 2026-07-11 01:00 | 73925 | | |
| 2026-07-11 00:00 | 87519 | | |
| 2026-07-10 23:00 | 107950 | | |
| 2026-07-10 22:00 | 131512 | | |
| 2026-07-10 21:00 | 150925 | | |
| 2026-07-10 20:00 | 161406 | | |
| 2026-07-10 19:00 | 162731 | | |
| 2026-07-10 18:00 | 157644 | | |
| 2026-07-10 17:00 | 151469 | | |