COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-09-01 21:00 | 75581 | | |
| 2026-09-01 20:00 | 82056 | | |
| 2026-09-01 19:00 | 87381 | | |
| 2026-09-01 18:00 | 85919 | | |
| 2026-09-01 17:00 | 76400 | | |
| 2026-09-01 16:00 | 66525 | | |
| 2026-09-01 15:00 | 61844 | | |
| 2026-09-01 14:00 | 60656 | | |
| 2026-09-01 13:00 | 62269 | | |
| 2026-09-01 12:00 | 67088 | | |
| 2026-09-01 11:00 | 72612 | | |
| 2026-09-01 10:00 | 76781 | | |
| 2026-09-01 09:00 | 79106 | | |
| 2026-09-01 08:00 | 78494 | | |
| 2026-09-01 07:00 | 74131 | | |
| 2026-09-01 06:00 | 68031 | | |
| 2026-09-01 05:00 | 64362 | | |
| 2026-09-01 04:00 | 65388 | | |
| 2026-09-01 03:00 | 71188 | | |
| 2026-09-01 02:00 | 81206 | | |
| 2026-09-01 01:00 | 93213 | | |
| 2026-09-01 00:00 | 105950 | | |
| 2026-08-31 23:00 | 119925 | | |
| 2026-08-31 22:00 | 131856 | | |
| 2026-08-31 21:00 | 138800 | | |
| 2026-08-31 20:00 | 143731 | | |
| 2026-08-31 19:00 | 146831 | | |
| 2026-08-31 18:00 | 144294 | | |
| 2026-08-31 17:00 | 138463 | | |
| 2026-08-31 16:00 | 135588 | | |
| 2026-08-31 15:00 | 135006 | | |
| 2026-08-31 14:00 | 129950 | | |
| 2026-08-31 13:00 | 117750 | | |
| 2026-08-31 12:00 | 103756 | | |
| 2026-08-31 11:00 | 94706 | | |
| 2026-08-31 10:00 | 89769 | | |
| 2026-08-31 09:00 | 84000 | | |
| 2026-08-31 08:00 | 76787 | | |
| 2026-08-31 07:00 | 67350 | | |
| 2026-08-31 06:00 | 54281 | | |
| 2026-08-31 05:00 | 43025 | | |
| 2026-08-31 04:00 | 39175 | | |
| 2026-08-31 03:00 | 41106 | | |
| 2026-08-31 02:00 | 45056 | | |
| 2026-08-31 01:00 | 48962 | | |
| 2026-08-31 00:00 | 53469 | | |
| 2026-08-30 23:00 | 61419 | | |
| 2026-08-30 22:00 | 72500 | | |
| 2026-08-30 21:00 | 81519 | | |
| 2026-08-30 20:00 | 85275 | | |
| 2026-08-30 19:00 | 85112 | | |
| 2026-08-30 18:00 | 81725 | | |
| 2026-08-30 17:00 | 74775 | | |
| 2026-08-30 16:00 | 66331 | | |
| 2026-08-30 15:00 | 59719 | | |
| 2026-08-30 14:00 | 56344 | | |
| 2026-08-30 13:00 | 54875 | | |
| 2026-08-30 12:00 | 53319 | | |
| 2026-08-30 11:00 | 50756 | | |
| 2026-08-30 10:00 | 46775 | | |
| 2026-08-30 09:00 | 42913 | | |
| 2026-08-30 08:00 | 42925 | | |
| 2026-08-30 07:00 | 46769 | | |
| 2026-08-30 06:00 | 49562 | | |
| 2026-08-30 05:00 | 49019 | | |
| 2026-08-30 04:00 | 47763 | | |
| 2026-08-30 03:00 | 49069 | | |
| 2026-08-30 02:00 | 53156 | | |
| 2026-08-30 01:00 | 57969 | | |
| 2026-08-30 00:00 | 64200 | | |
| 2026-08-29 23:00 | 73900 | | |
| 2026-08-29 22:00 | 84119 | | |
| 2026-08-29 21:00 | 90912 | | |
| 2026-08-29 20:00 | 94706 | | |
| 2026-08-29 19:00 | 95888 | | |
| 2026-08-29 18:00 | 92619 | | |
| 2026-08-29 17:00 | 84100 | | |
| 2026-08-29 16:00 | 73588 | | |
| 2026-08-29 15:00 | 66119 | | |
| 2026-08-29 14:00 | 61919 | | |
| 2026-08-29 13:00 | 58131 | | |
| 2026-08-29 12:00 | 55125 | | |
| 2026-08-29 11:00 | 55375 | | |
| 2026-08-29 10:00 | 58763 | | |
| 2026-08-29 09:00 | 61388 | | |
| 2026-08-29 08:00 | 60669 | | |
| 2026-08-29 07:00 | 58544 | | |
| 2026-08-29 06:00 | 57119 | | |
| 2026-08-29 05:00 | 56356 | | |
| 2026-08-29 04:00 | 55962 | | |
| 2026-08-29 03:00 | 56587 | | |
| 2026-08-29 02:00 | 59038 | | |
| 2026-08-29 01:00 | 62163 | | |
| 2026-08-29 00:00 | 64044 | | |
| 2026-08-28 23:00 | 65475 | | |
| 2026-08-28 22:00 | 69244 | | |
| 2026-08-28 21:00 | 76588 | | |
| 2026-08-28 20:00 | 85619 | | |
| 2026-08-28 19:00 | 92600 | | |
| 2026-08-28 18:00 | 94819 | | |
| 2026-08-28 17:00 | 92463 | | |
| 2026-08-28 16:00 | 88119 | | |
| 2026-08-28 15:00 | 84487 | | |
| 2026-08-28 14:00 | 82350 | | |
| 2026-08-28 13:00 | 81444 | | |
| 2026-08-28 12:00 | 81419 | | |
| 2026-08-28 11:00 | 81044 | | |
| 2026-08-28 10:00 | 79250 | | |
| 2026-08-28 09:00 | 76019 | | |
| 2026-08-28 08:00 | 71600 | | |
| 2026-08-28 07:00 | 65925 | | |
| 2026-08-28 06:00 | 58425 | | |
| 2026-08-28 05:00 | 50306 | | |
| 2026-08-28 04:00 | 46231 | | |
| 2026-08-28 03:00 | 50131 | | |
| 2026-08-28 02:00 | 59269 | | |
| 2026-08-28 01:00 | 66794 | | |
| 2026-08-28 00:00 | 71894 | | |
| 2026-08-27 23:00 | 80031 | | |
| 2026-08-27 22:00 | 91494 | | |
| 2026-08-27 21:00 | 101600 | | |
| 2026-08-27 20:00 | 110250 | | |
| 2026-08-27 19:00 | 118412 | | |
| 2026-08-27 18:00 | 122650 | | |
| 2026-08-27 17:00 | 119700 | | |
| 2026-08-27 16:00 | 110806 | | |
| 2026-08-27 15:00 | 100250 | | |
| 2026-08-27 14:00 | 90625 | | |
| 2026-08-27 13:00 | 82644 | | |
| 2026-08-27 12:00 | 77831 | | |
| 2026-08-27 11:00 | 77475 | | |
| 2026-08-27 10:00 | 77844 | | |
| 2026-08-27 09:00 | 71756 | | |
| 2026-08-27 08:00 | 60419 | | |
| 2026-08-27 07:00 | 51144 | | |
| 2026-08-27 06:00 | 45031 | | |
| 2026-08-27 05:00 | 41612 | | |
| 2026-08-27 04:00 | 42775 | | |
| 2026-08-27 03:00 | 47150 | | |
| 2026-08-27 02:00 | 54000 | | |
| 2026-08-27 01:00 | 66237 | | |
| 2026-08-27 00:00 | 83912 | | |
| 2026-08-26 23:00 | 103763 | | |
| 2026-08-26 22:00 | 123056 | | |
| 2026-08-26 21:00 | 140369 | | |
| 2026-08-26 20:00 | 156238 | | |
| 2026-08-26 19:00 | 167912 | | |
| 2026-08-26 18:00 | 166356 | | |
| 2026-08-26 17:00 | 148856 | | |
| 2026-08-26 16:00 | 125319 | | |
| 2026-08-26 15:00 | 104169 | | |
| 2026-08-26 14:00 | 85875 | | |
| 2026-08-26 13:00 | 72088 | | |
| 2026-08-26 12:00 | 64612 | | |
| 2026-08-26 11:00 | 60981 | | |
| 2026-08-26 10:00 | 60288 | | |
| 2026-08-26 09:00 | 62675 | | |
| 2026-08-26 08:00 | 65213 | | |
| 2026-08-26 07:00 | 64756 | | |
| 2026-08-26 06:00 | 60931 | | |
| 2026-08-26 05:00 | 56869 | | |
| 2026-08-26 04:00 | 56306 | | |
| 2026-08-26 03:00 | 60112 | | |
| 2026-08-26 02:00 | 67769 | | |
| 2026-08-26 01:00 | 78838 | | |
| 2026-08-26 00:00 | 92106 | | |
| 2026-08-25 23:00 | 106844 | | |
| 2026-08-25 22:00 | 124919 | | |
| 2026-08-25 21:00 | 146531 | | |
| 2026-08-25 20:00 | 165625 | | |
| 2026-08-25 19:00 | 175900 | | |
| 2026-08-25 18:00 | 175125 | | |
| 2026-08-25 17:00 | 163219 | | |
| 2026-08-25 16:00 | 146137 | | |
| 2026-08-25 15:00 | 132287 | | |
| 2026-08-25 14:00 | 120925 | | |
| 2026-08-25 13:00 | 107487 | | |
| 2026-08-25 12:00 | 93044 | | |
| 2026-08-25 11:00 | 80306 | | |
| 2026-08-25 10:00 | 69825 | | |
| 2026-08-25 09:00 | 61462 | | |
| 2026-08-25 08:00 | 55225 | | |
| 2026-08-25 07:00 | 49819 | | |
| 2026-08-25 06:00 | 43231 | | |
| 2026-08-25 05:00 | 36975 | | |
| 2026-08-25 04:00 | 35337 | | |
| 2026-08-25 03:00 | 39712 | | |
| 2026-08-25 02:00 | 48719 | | |
| 2026-08-25 01:00 | 61569 | | |
| 2026-08-25 00:00 | 77300 | | |
| 2026-08-24 23:00 | 94975 | | |
| 2026-08-24 22:00 | 115681 | | |
| 2026-08-24 21:00 | 139300 | | |
| 2026-08-24 20:00 | 158969 | | |
| 2026-08-24 19:00 | 166363 | | |
| 2026-08-24 18:00 | 162088 | | |
| 2026-08-24 17:00 | 150713 | | |
| 2026-08-24 16:00 | 134688 | | |
| 2026-08-24 15:00 | 118319 | | |
| 2026-08-24 14:00 | 104331 | | |
| 2026-08-24 13:00 | 91081 | | |
| 2026-08-24 12:00 | 77838 | | |
| 2026-08-24 11:00 | 66375 | | |
| 2026-08-24 10:00 | 58894 | | |
| 2026-08-24 09:00 | 55106 | | |
| 2026-08-24 08:00 | 52106 | | |
| 2026-08-24 07:00 | 48850 | | |
| 2026-08-24 06:00 | 46469 | | |
| 2026-08-24 05:00 | 45369 | | |
| 2026-08-24 04:00 | 46413 | | |
| 2026-08-24 03:00 | 51625 | | |
| 2026-08-24 02:00 | 62269 | | |
| 2026-08-24 01:00 | 75725 | | |
| 2026-08-24 00:00 | 86112 | | |
| 2026-08-23 23:00 | 92737 | | |
| 2026-08-23 22:00 | 100475 | | |
| 2026-08-23 21:00 | 111056 | | |
| 2026-08-23 20:00 | 122125 | | |
| 2026-08-23 19:00 | 128875 | | |
| 2026-08-23 18:00 | 126513 | | |
| 2026-08-23 17:00 | 116200 | | |
| 2026-08-23 16:00 | 102994 | | |
| 2026-08-23 15:00 | 89375 | | |
| 2026-08-23 14:00 | 76581 | | |
| 2026-08-23 13:00 | 67362 | | |
| 2026-08-23 12:00 | 62175 | | |
| 2026-08-23 11:00 | 57837 | | |
| 2026-08-23 10:00 | 52856 | | |
| 2026-08-23 09:00 | 48144 | | |
| 2026-08-23 08:00 | 43781 | | |
| 2026-08-23 07:00 | 39600 | | |
| 2026-08-23 06:00 | 35650 | | |
| 2026-08-23 05:00 | 31837 | | |
| 2026-08-23 04:00 | 29488 | | |
| 2026-08-23 03:00 | 30475 | | |
| 2026-08-23 02:00 | 34519 | | |
| 2026-08-23 01:00 | 40788 | | |
| 2026-08-23 00:00 | 50038 | | |
| 2026-08-22 23:00 | 62706 | | |
| 2026-08-22 22:00 | 77481 | | |
| 2026-08-22 21:00 | 92806 | | |
| 2026-08-22 20:00 | 107769 | | |
| 2026-08-22 19:00 | 119963 | | |
| 2026-08-22 18:00 | 124338 | | |
| 2026-08-22 17:00 | 116737 | | |