COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-04-07 00:00 | 117088 | | |
| 2026-04-06 23:00 | 130831 | | |
| 2026-04-06 22:00 | 137556 | | |
| 2026-04-06 21:00 | 138838 | | |
| 2026-04-06 20:00 | 133562 | | |
| 2026-04-06 19:00 | 114781 | | |
| 2026-04-06 18:00 | 86700 | | |
| 2026-04-06 17:00 | 65312 | | |
| 2026-04-06 16:00 | 56975 | | |
| 2026-04-06 15:00 | 56575 | | |
| 2026-04-06 14:00 | 59044 | | |
| 2026-04-06 13:00 | 62069 | | |
| 2026-04-06 12:00 | 67713 | | |
| 2026-04-06 11:00 | 80794 | | |
| 2026-04-06 10:00 | 102800 | | |
| 2026-04-06 09:00 | 127756 | | |
| 2026-04-06 08:00 | 144331 | | |
| 2026-04-06 07:00 | 146387 | | |
| 2026-04-06 06:00 | 137412 | | |
| 2026-04-06 05:00 | 123763 | | |
| 2026-04-06 04:00 | 111444 | | |
| 2026-04-06 03:00 | 104569 | | |
| 2026-04-06 02:00 | 102088 | | |
| 2026-04-06 01:00 | 100787 | | |
| 2026-04-06 00:00 | 102519 | | |
| 2026-04-05 23:00 | 112156 | | |
| 2026-04-05 22:00 | 127250 | | |
| 2026-04-05 21:00 | 138419 | | |
| 2026-04-05 20:00 | 138387 | | |
| 2026-04-05 19:00 | 125062 | | |
| 2026-04-05 18:00 | 102606 | | |
| 2026-04-05 17:00 | 80925 | | |
| 2026-04-05 16:00 | 67844 | | |
| 2026-04-05 15:00 | 64306 | | |
| 2026-04-05 14:00 | 67469 | | |
| 2026-04-05 13:00 | 73544 | | |
| 2026-04-05 12:00 | 80650 | | |
| 2026-04-05 11:00 | 90144 | | |
| 2026-04-05 10:00 | 102844 | | |
| 2026-04-05 09:00 | 115794 | | |
| 2026-04-05 08:00 | 122844 | | |
| 2026-04-05 07:00 | 120631 | | |
| 2026-04-05 06:00 | 114638 | | |
| 2026-04-05 05:00 | 111806 | | |
| 2026-04-05 04:00 | 110388 | | |
| 2026-04-05 03:00 | 107925 | | |
| 2026-04-05 02:00 | 109975 | | |
| 2026-04-05 01:00 | 119662 | | |
| 2026-04-05 00:00 | 131306 | | |
| 2026-04-04 23:00 | 139306 | | |
| 2026-04-04 22:00 | 142012 | | |
| 2026-04-04 21:00 | 138156 | | |
| 2026-04-04 20:00 | 125394 | | |
| 2026-04-04 19:00 | 102750 | | |
| 2026-04-04 18:00 | 76656 | | |
| 2026-04-04 17:00 | 58181 | | |
| 2026-04-04 16:00 | 50794 | | |
| 2026-04-04 15:00 | 50781 | | |
| 2026-04-04 14:00 | 55350 | | |
| 2026-04-04 13:00 | 62981 | | |
| 2026-04-04 12:00 | 72450 | | |
| 2026-04-04 11:00 | 83388 | | |
| 2026-04-04 10:00 | 96075 | | |
| 2026-04-04 09:00 | 111812 | | |
| 2026-04-04 08:00 | 129463 | | |
| 2026-04-04 07:00 | 142169 | | |
| 2026-04-04 06:00 | 146044 | | |
| 2026-04-04 05:00 | 144856 | | |
| 2026-04-04 04:00 | 141775 | | |
| 2026-04-04 03:00 | 138213 | | |
| 2026-04-04 02:00 | 136506 | | |
| 2026-04-04 01:00 | 137569 | | |
| 2026-04-04 00:00 | 140519 | | |
| 2026-04-03 23:00 | 142312 | | |
| 2026-04-03 22:00 | 140387 | | |
| 2026-04-03 21:00 | 137469 | | |
| 2026-04-03 20:00 | 134387 | | |
| 2026-04-03 19:00 | 124031 | | |
| 2026-04-03 18:00 | 104388 | | |
| 2026-04-03 17:00 | 85106 | | |
| 2026-04-03 16:00 | 73588 | | |
| 2026-04-03 15:00 | 69250 | | |
| 2026-04-03 14:00 | 70681 | | |
| 2026-04-03 13:00 | 77537 | | |
| 2026-04-03 12:00 | 88406 | | |
| 2026-04-03 11:00 | 100888 | | |
| 2026-04-03 10:00 | 112475 | | |
| 2026-04-03 09:00 | 120744 | | |
| 2026-04-03 08:00 | 124612 | | |
| 2026-04-03 07:00 | 124419 | | |
| 2026-04-03 06:00 | 119750 | | |
| 2026-04-03 05:00 | 111481 | | |
| 2026-04-03 04:00 | 103994 | | |
| 2026-04-03 03:00 | 100219 | | |
| 2026-04-03 02:00 | 98644 | | |
| 2026-04-03 01:00 | 97719 | | |
| 2026-04-03 00:00 | 98619 | | |
| 2026-04-02 23:00 | 102200 | | |
| 2026-04-02 22:00 | 105769 | | |
| 2026-04-02 21:00 | 105344 | | |
| 2026-04-02 20:00 | 99044 | | |
| 2026-04-02 19:00 | 87194 | | |
| 2026-04-02 18:00 | 74269 | | |
| 2026-04-02 17:00 | 66900 | | |
| 2026-04-02 16:00 | 66125 | | |
| 2026-04-02 15:00 | 68000 | | |
| 2026-04-02 14:00 | 69463 | | |
| 2026-04-02 13:00 | 70231 | | |
| 2026-04-02 12:00 | 72650 | | |
| 2026-04-02 11:00 | 80056 | | |
| 2026-04-02 10:00 | 94050 | | |
| 2026-04-02 09:00 | 110250 | | |
| 2026-04-02 08:00 | 119819 | | |
| 2026-04-02 07:00 | 120494 | | |
| 2026-04-02 06:00 | 117575 | | |
| 2026-04-02 05:00 | 115088 | | |
| 2026-04-02 04:00 | 113400 | | |
| 2026-04-02 03:00 | 110688 | | |
| 2026-04-02 02:00 | 107888 | | |
| 2026-04-02 01:00 | 108631 | | |
| 2026-04-02 00:00 | 111544 | | |
| 2026-04-01 23:00 | 112800 | | |
| 2026-04-01 22:00 | 113594 | | |
| 2026-04-01 21:00 | 117862 | | |
| 2026-04-01 20:00 | 124450 | | |
| 2026-04-01 19:00 | 126269 | | |
| 2026-04-01 18:00 | 120100 | | |
| 2026-04-01 17:00 | 111287 | | |
| 2026-04-01 16:00 | 105950 | | |
| 2026-04-01 15:00 | 104706 | | |
| 2026-04-01 14:00 | 105281 | | |
| 2026-04-01 13:00 | 107188 | | |
| 2026-04-01 12:00 | 111612 | | |
| 2026-04-01 11:00 | 117494 | | |
| 2026-04-01 10:00 | 122200 | | |
| 2026-04-01 09:00 | 127013 | | |
| 2026-04-01 08:00 | 133438 | | |
| 2026-04-01 07:00 | 135775 | | |
| 2026-04-01 06:00 | 128787 | | |
| 2026-04-01 05:00 | 116875 | | |
| 2026-04-01 04:00 | 107031 | | |
| 2026-04-01 03:00 | 100812 | | |
| 2026-04-01 02:00 | 98300 | | |
| 2026-04-01 01:00 | 101644 | | |
| 2026-04-01 00:00 | 111056 | | |
| 2026-03-31 23:00 | 123044 | | |
| 2026-03-31 22:00 | 132800 | | |
| 2026-03-31 21:00 | 137369 | | |
| 2026-03-31 20:00 | 137369 | | |
| 2026-03-31 19:00 | 133762 | | |
| 2026-03-31 18:00 | 126688 | | |
| 2026-03-31 17:00 | 118619 | | |
| 2026-03-31 16:00 | 112706 | | |
| 2026-03-31 15:00 | 109525 | | |
| 2026-03-31 14:00 | 108400 | | |
| 2026-03-31 13:00 | 108469 | | |
| 2026-03-31 12:00 | 110431 | | |
| 2026-03-31 11:00 | 118375 | | |
| 2026-03-31 10:00 | 132269 | | |
| 2026-03-31 09:00 | 144344 | | |
| 2026-03-31 08:00 | 149944 | | |
| 2026-03-31 07:00 | 151519 | | |
| 2026-03-31 06:00 | 152294 | | |
| 2026-03-31 05:00 | 152281 | | |
| 2026-03-31 04:00 | 148350 | | |
| 2026-03-31 03:00 | 140363 | | |
| 2026-03-31 02:00 | 133075 | | |
| 2026-03-31 01:00 | 129562 | | |
| 2026-03-31 00:00 | 130325 | | |
| 2026-03-30 23:00 | 133906 | | |
| 2026-03-30 22:00 | 136588 | | |
| 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 | | |