COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-03-30 21:00 | 137800 | | |
| 2026-03-30 20:00 | 138637 | | |
| 2026-03-30 19:00 | 136656 | | |
| 2026-03-30 18:00 | 132106 | | |
| 2026-03-30 17:00 | 130494 | | |
| 2026-03-30 16:00 | 133550 | | |
| 2026-03-30 15:00 | 137438 | | |
| 2026-03-30 14:00 | 140062 | | |
| 2026-03-30 13:00 | 141887 | | |
| 2026-03-30 12:00 | 142581 | | |
| 2026-03-30 11:00 | 141894 | | |
| 2026-03-30 10:00 | 140525 | | |
| 2026-03-30 09:00 | 139613 | | |
| 2026-03-30 08:00 | 138775 | | |
| 2026-03-30 07:00 | 136331 | | |
| 2026-03-30 06:00 | 132431 | | |
| 2026-03-30 05:00 | 127481 | | |
| 2026-03-30 04:00 | 120906 | | |
| 2026-03-30 03:00 | 113263 | | |
| 2026-03-30 02:00 | 107794 | | |
| 2026-03-30 01:00 | 109881 | | |
| 2026-03-30 00:00 | 121550 | | |
| 2026-03-29 23:00 | 137881 | | |
| 2026-03-29 22:00 | 150562 | | |
| 2026-03-29 21:00 | 153781 | | |
| 2026-03-29 20:00 | 148762 | | |
| 2026-03-29 19:00 | 139556 | | |
| 2026-03-29 18:00 | 126281 | | |
| 2026-03-29 17:00 | 111369 | | |
| 2026-03-29 16:00 | 102056 | | |
| 2026-03-29 15:00 | 99912 | | |
| 2026-03-29 14:00 | 100919 | | |
| 2026-03-29 13:00 | 103881 | | |
| 2026-03-29 12:00 | 108938 | | |
| 2026-03-29 11:00 | 113075 | | |
| 2026-03-29 10:00 | 114825 | | |
| 2026-03-29 09:00 | 116600 | | |
| 2026-03-29 08:00 | 116456 | | |
| 2026-03-29 07:00 | 110294 | | |
| 2026-03-29 06:00 | 101250 | | |
| 2026-03-29 05:00 | 94562 | | |
| 2026-03-29 04:00 | 91688 | | |
| 2026-03-29 03:00 | 91575 | | |
| 2026-03-29 02:00 | 91225 | | |
| 2026-03-29 01:00 | 90388 | | |
| 2026-03-29 00:00 | 92656 | | |
| 2026-03-28 23:00 | 98713 | | |
| 2026-03-28 22:00 | 105556 | | |
| 2026-03-28 21:00 | 109481 | | |
| 2026-03-28 20:00 | 107925 | | |
| 2026-03-28 19:00 | 102100 | | |
| 2026-03-28 18:00 | 94088 | | |
| 2026-03-28 17:00 | 83800 | | |
| 2026-03-28 16:00 | 73794 | | |
| 2026-03-28 15:00 | 69256 | | |
| 2026-03-28 14:00 | 72287 | | |
| 2026-03-28 13:00 | 81412 | | |
| 2026-03-28 12:00 | 91594 | | |
| 2026-03-28 11:00 | 98013 | | |
| 2026-03-28 10:00 | 103894 | | |
| 2026-03-28 09:00 | 115487 | | |
| 2026-03-28 08:00 | 131988 | | |
| 2026-03-28 07:00 | 147906 | | |
| 2026-03-28 06:00 | 159100 | | |
| 2026-03-28 05:00 | 163988 | | |
| 2026-03-28 04:00 | 163787 | | |
| 2026-03-28 03:00 | 161444 | | |
| 2026-03-28 02:00 | 159250 | | |
| 2026-03-28 01:00 | 157825 | | |
| 2026-03-28 00:00 | 156369 | | |
| 2026-03-27 23:00 | 154988 | | |
| 2026-03-27 22:00 | 156387 | | |
| 2026-03-27 21:00 | 160919 | | |
| 2026-03-27 20:00 | 162169 | | |
| 2026-03-27 19:00 | 152406 | | |
| 2026-03-27 18:00 | 132131 | | |
| 2026-03-27 17:00 | 112031 | | |
| 2026-03-27 16:00 | 101969 | | |
| 2026-03-27 15:00 | 102431 | | |
| 2026-03-27 14:00 | 110325 | | |
| 2026-03-27 13:00 | 123250 | | |
| 2026-03-27 12:00 | 137012 | | |
| 2026-03-27 11:00 | 147094 | | |
| 2026-03-27 10:00 | 152881 | | |
| 2026-03-27 09:00 | 157637 | | |
| 2026-03-27 08:00 | 162656 | | |
| 2026-03-27 07:00 | 165956 | | |
| 2026-03-27 06:00 | 168006 | | |
| 2026-03-27 05:00 | 169825 | | |
| 2026-03-27 04:00 | 168881 | | |
| 2026-03-27 03:00 | 164363 | | |
| 2026-03-27 02:00 | 159369 | | |
| 2026-03-27 01:00 | 156319 | | |
| 2026-03-27 00:00 | 155744 | | |
| 2026-03-26 23:00 | 156681 | | |
| 2026-03-26 22:00 | 156338 | | |
| 2026-03-26 21:00 | 152194 | | |
| 2026-03-26 20:00 | 143400 | | |
| 2026-03-26 19:00 | 129431 | | |
| 2026-03-26 18:00 | 111688 | | |
| 2026-03-26 17:00 | 95919 | | |
| 2026-03-26 16:00 | 87925 | | |
| 2026-03-26 15:00 | 88713 | | |
| 2026-03-26 14:00 | 95969 | | |
| 2026-03-26 13:00 | 107331 | | |
| 2026-03-26 12:00 | 120525 | | |
| 2026-03-26 11:00 | 132069 | | |
| 2026-03-26 10:00 | 138281 | | |
| 2026-03-26 09:00 | 138488 | | |
| 2026-03-26 08:00 | 136881 | | |
| 2026-03-26 07:00 | 137875 | | |
| 2026-03-26 06:00 | 141037 | | |
| 2026-03-26 05:00 | 144319 | | |
| 2026-03-26 04:00 | 147294 | | |
| 2026-03-26 03:00 | 149925 | | |
| 2026-03-26 02:00 | 152194 | | |
| 2026-03-26 01:00 | 153794 | | |
| 2026-03-26 00:00 | 154056 | | |
| 2026-03-25 23:00 | 152756 | | |
| 2026-03-25 22:00 | 149631 | | |
| 2026-03-25 21:00 | 145056 | | |
| 2026-03-25 20:00 | 140631 | | |
| 2026-03-25 19:00 | 135675 | | |
| 2026-03-25 18:00 | 126125 | | |
| 2026-03-25 17:00 | 111400 | | |
| 2026-03-25 16:00 | 98381 | | |
| 2026-03-25 15:00 | 93475 | | |
| 2026-03-25 14:00 | 95237 | | |
| 2026-03-25 13:00 | 98781 | | |
| 2026-03-25 12:00 | 103444 | | |
| 2026-03-25 11:00 | 112031 | | |
| 2026-03-25 10:00 | 124644 | | |
| 2026-03-25 09:00 | 137950 | | |
| 2026-03-25 08:00 | 148031 | | |
| 2026-03-25 07:00 | 152131 | | |
| 2026-03-25 06:00 | 150194 | | |
| 2026-03-25 05:00 | 144213 | | |
| 2026-03-25 04:00 | 137581 | | |
| 2026-03-25 03:00 | 133606 | | |
| 2026-03-25 02:00 | 130613 | | |
| 2026-03-25 01:00 | 123881 | | |
| 2026-03-25 00:00 | 116144 | | |
| 2026-03-24 23:00 | 116119 | | |
| 2026-03-24 22:00 | 124425 | | |
| 2026-03-24 21:00 | 132631 | | |
| 2026-03-24 20:00 | 133494 | | |
| 2026-03-24 19:00 | 124537 | | |
| 2026-03-24 18:00 | 108719 | | |
| 2026-03-24 17:00 | 94294 | | |
| 2026-03-24 16:00 | 88013 | | |
| 2026-03-24 15:00 | 90175 | | |
| 2026-03-24 14:00 | 97281 | | |
| 2026-03-24 13:00 | 104794 | | |
| 2026-03-24 12:00 | 110269 | | |
| 2026-03-24 11:00 | 115019 | | |
| 2026-03-24 10:00 | 121513 | | |
| 2026-03-24 09:00 | 131156 | | |
| 2026-03-24 08:00 | 139569 | | |
| 2026-03-24 07:00 | 136963 | | |
| 2026-03-24 06:00 | 123062 | | |
| 2026-03-24 05:00 | 111312 | | |
| 2026-03-24 04:00 | 109956 | | |
| 2026-03-24 03:00 | 114188 | | |
| 2026-03-24 02:00 | 119500 | | |
| 2026-03-24 01:00 | 127506 | | |
| 2026-03-24 00:00 | 139269 | | |
| 2026-03-23 23:00 | 152106 | | |
| 2026-03-23 22:00 | 163744 | | |
| 2026-03-23 21:00 | 173319 | | |
| 2026-03-23 20:00 | 175650 | | |
| 2026-03-23 19:00 | 162881 | | |
| 2026-03-23 18:00 | 135975 | | |
| 2026-03-23 17:00 | 108681 | | |
| 2026-03-23 16:00 | 94375 | | |
| 2026-03-23 15:00 | 93356 | | |
| 2026-03-23 14:00 | 99562 | | |
| 2026-03-23 13:00 | 110838 | | |
| 2026-03-23 12:00 | 125919 | | |
| 2026-03-23 11:00 | 141113 | | |
| 2026-03-23 10:00 | 153919 | | |
| 2026-03-23 09:00 | 163631 | | |
| 2026-03-23 08:00 | 168537 | | |
| 2026-03-23 07:00 | 165475 | | |
| 2026-03-23 06:00 | 152456 | | |
| 2026-03-23 05:00 | 133762 | | |
| 2026-03-23 04:00 | 118406 | | |
| 2026-03-23 03:00 | 110244 | | |
| 2026-03-23 02:00 | 107213 | | |
| 2026-03-23 01:00 | 109150 | | |
| 2026-03-23 00:00 | 117869 | | |
| 2026-03-22 23:00 | 132213 | | |
| 2026-03-22 22:00 | 148531 | | |
| 2026-03-22 21:00 | 162456 | | |
| 2026-03-22 20:00 | 166512 | | |
| 2026-03-22 19:00 | 154450 | | |
| 2026-03-22 18:00 | 131294 | | |
| 2026-03-22 17:00 | 109787 | | |
| 2026-03-22 16:00 | 97644 | | |
| 2026-03-22 15:00 | 94812 | | |
| 2026-03-22 14:00 | 99581 | | |
| 2026-03-22 13:00 | 111531 | | |
| 2026-03-22 12:00 | 128537 | | |
| 2026-03-22 11:00 | 144156 | | |
| 2026-03-22 10:00 | 152338 | | |
| 2026-03-22 09:00 | 153919 | | |
| 2026-03-22 08:00 | 151225 | | |
| 2026-03-22 07:00 | 142050 | | |
| 2026-03-22 06:00 | 127256 | | |
| 2026-03-22 05:00 | 113200 | | |
| 2026-03-22 04:00 | 104263 | | |
| 2026-03-22 03:00 | 101062 | | |
| 2026-03-22 02:00 | 103581 | | |
| 2026-03-22 01:00 | 110938 | | |
| 2026-03-22 00:00 | 118519 | | |
| 2026-03-21 23:00 | 123275 | | |
| 2026-03-21 22:00 | 128425 | | |
| 2026-03-21 21:00 | 134656 | | |
| 2026-03-21 20:00 | 137225 | | |
| 2026-03-21 19:00 | 130787 | | |
| 2026-03-21 18:00 | 111631 | | |
| 2026-03-21 17:00 | 87319 | | |
| 2026-03-21 16:00 | 73750 | | |
| 2026-03-21 15:00 | 75088 | | |
| 2026-03-21 14:00 | 84031 | | |
| 2026-03-21 13:00 | 94213 | | |
| 2026-03-21 12:00 | 102606 | | |
| 2026-03-21 11:00 | 109588 | | |
| 2026-03-21 10:00 | 116938 | | |
| 2026-03-21 09:00 | 123050 | | |
| 2026-03-21 08:00 | 121588 | | |
| 2026-03-21 07:00 | 109819 | | |
| 2026-03-21 06:00 | 96763 | | |
| 2026-03-21 05:00 | 92506 | | |
| 2026-03-21 04:00 | 96112 | | |
| 2026-03-21 03:00 | 102612 | | |
| 2026-03-21 02:00 | 110938 | | |
| 2026-03-21 01:00 | 121525 | | |
| 2026-03-21 00:00 | 133669 | | |
| 2026-03-20 23:00 | 145044 | | |
| 2026-03-20 22:00 | 153425 | | |
| 2026-03-20 21:00 | 158600 | | |
| 2026-03-20 20:00 | 158287 | | |
| 2026-03-20 19:00 | 146906 | | |
| 2026-03-20 18:00 | 123588 | | |
| 2026-03-20 17:00 | 96819 | | |