COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-06-05 20:00 | 168231 | | |
| 2026-06-05 19:00 | 169438 | | |
| 2026-06-05 18:00 | 169225 | | |
| 2026-06-05 17:00 | 168169 | | |
| 2026-06-05 16:00 | 166500 | | |
| 2026-06-05 15:00 | 165731 | | |
| 2026-06-05 14:00 | 166319 | | |
| 2026-06-05 13:00 | 164387 | | |
| 2026-06-05 12:00 | 158806 | | |
| 2026-06-05 11:00 | 154850 | | |
| 2026-06-05 10:00 | 154069 | | |
| 2026-06-05 09:00 | 153000 | | |
| 2026-06-05 08:00 | 153500 | | |
| 2026-06-05 07:00 | 157269 | | |
| 2026-06-05 06:00 | 156900 | | |
| 2026-06-05 05:00 | 149113 | | |
| 2026-06-05 04:00 | 141463 | | |
| 2026-06-05 03:00 | 139425 | | |
| 2026-06-05 02:00 | 143481 | | |
| 2026-06-05 01:00 | 153525 | | |
| 2026-06-05 00:00 | 165512 | | |
| 2026-06-04 23:00 | 171875 | | |
| 2026-06-04 22:00 | 170113 | | |
| 2026-06-04 21:00 | 165287 | | |
| 2026-06-04 20:00 | 162644 | | |
| 2026-06-04 19:00 | 162169 | | |
| 2026-06-04 18:00 | 161150 | | |
| 2026-06-04 17:00 | 158831 | | |
| 2026-06-04 16:00 | 156456 | | |
| 2026-06-04 15:00 | 155425 | | |
| 2026-06-04 14:00 | 156925 | | |
| 2026-06-04 13:00 | 161169 | | |
| 2026-06-04 12:00 | 167262 | | |
| 2026-06-04 11:00 | 173213 | | |
| 2026-06-04 10:00 | 176231 | | |
| 2026-06-04 09:00 | 174869 | | |
| 2026-06-04 08:00 | 171169 | | |
| 2026-06-04 07:00 | 170019 | | |
| 2026-06-04 06:00 | 173012 | | |
| 2026-06-04 05:00 | 175831 | | |
| 2026-06-04 04:00 | 174206 | | |
| 2026-06-04 03:00 | 168519 | | |
| 2026-06-04 02:00 | 163338 | | |
| 2026-06-04 01:00 | 162556 | | |
| 2026-06-04 00:00 | 164444 | | |
| 2026-06-03 23:00 | 164812 | | |
| 2026-06-03 22:00 | 164275 | | |
| 2026-06-03 21:00 | 166044 | | |
| 2026-06-03 20:00 | 168881 | | |
| 2026-06-03 19:00 | 169250 | | |
| 2026-06-03 18:00 | 167338 | | |
| 2026-06-03 17:00 | 166688 | | |
| 2026-06-03 16:00 | 167400 | | |
| 2026-06-03 15:00 | 166669 | | |
| 2026-06-03 14:00 | 167156 | | |
| 2026-06-03 13:00 | 171281 | | |
| 2026-06-03 12:00 | 173544 | | |
| 2026-06-03 11:00 | 170706 | | |
| 2026-06-03 10:00 | 167775 | | |
| 2026-06-03 09:00 | 169062 | | |
| 2026-06-03 08:00 | 173056 | | |
| 2026-06-03 07:00 | 176350 | | |
| 2026-06-03 06:00 | 177456 | | |
| 2026-06-03 05:00 | 177144 | | |
| 2026-06-03 04:00 | 176419 | | |
| 2026-06-03 03:00 | 176113 | | |
| 2026-06-03 02:00 | 177812 | | |
| 2026-06-03 01:00 | 181287 | | |
| 2026-06-03 00:00 | 183825 | | |
| 2026-06-02 23:00 | 183969 | | |
| 2026-06-02 22:00 | 182750 | | |
| 2026-06-02 21:00 | 181831 | | |
| 2026-06-02 20:00 | 181725 | | |
| 2026-06-02 19:00 | 181550 | | |
| 2026-06-02 18:00 | 180162 | | |
| 2026-06-02 17:00 | 177500 | | |
| 2026-06-02 16:00 | 174525 | | |
| 2026-06-02 15:00 | 171519 | | |
| 2026-06-02 14:00 | 167719 | | |
| 2026-06-02 13:00 | 162431 | | |
| 2026-06-02 12:00 | 156569 | | |
| 2026-06-02 11:00 | 152894 | | |
| 2026-06-02 10:00 | 153088 | | |
| 2026-06-02 09:00 | 156231 | | |
| 2026-06-02 08:00 | 159944 | | |
| 2026-06-02 07:00 | 161275 | | |
| 2026-06-02 06:00 | 158894 | | |
| 2026-06-02 05:00 | 155550 | | |
| 2026-06-02 04:00 | 155512 | | |
| 2026-06-02 03:00 | 160119 | | |
| 2026-06-02 02:00 | 168044 | | |
| 2026-06-02 01:00 | 176025 | | |
| 2026-06-02 00:00 | 179881 | | |
| 2026-06-01 23:00 | 178900 | | |
| 2026-06-01 22:00 | 176287 | | |
| 2026-06-01 21:00 | 174550 | | |
| 2026-06-01 20:00 | 172750 | | |
| 2026-06-01 19:00 | 169938 | | |
| 2026-06-01 18:00 | 169231 | | |
| 2026-06-01 17:00 | 173056 | | |
| 2026-06-01 16:00 | 178606 | | |
| 2026-06-01 15:00 | 181769 | | |
| 2026-06-01 14:00 | 180656 | | |
| 2026-06-01 13:00 | 176350 | | |
| 2026-06-01 12:00 | 170669 | | |
| 2026-06-01 11:00 | 163169 | | |
| 2026-06-01 10:00 | 155506 | | |
| 2026-06-01 09:00 | 151756 | | |
| 2026-06-01 08:00 | 152062 | | |
| 2026-06-01 07:00 | 154931 | | |
| 2026-06-01 06:00 | 158344 | | |
| 2026-06-01 05:00 | 158356 | | |
| 2026-06-01 04:00 | 155106 | | |
| 2026-06-01 03:00 | 152981 | | |
| 2026-06-01 02:00 | 154869 | | |
| 2026-06-01 01:00 | 161200 | | |
| 2026-06-01 00:00 | 169700 | | |
| 2026-05-31 23:00 | 176256 | | |
| 2026-05-31 22:00 | 179681 | | |
| 2026-05-31 21:00 | 181800 | | |
| 2026-05-31 20:00 | 179463 | | |
| 2026-05-31 19:00 | 165044 | | |
| 2026-05-31 18:00 | 141425 | | |
| 2026-05-31 17:00 | 121700 | | |
| 2026-05-31 16:00 | 110694 | | |
| 2026-05-31 15:00 | 104000 | | |
| 2026-05-31 14:00 | 99419 | | |
| 2026-05-31 13:00 | 97312 | | |
| 2026-05-31 12:00 | 97425 | | |
| 2026-05-31 11:00 | 99056 | | |
| 2026-05-31 10:00 | 101287 | | |
| 2026-05-31 09:00 | 103881 | | |
| 2026-05-31 08:00 | 108019 | | |
| 2026-05-31 07:00 | 114656 | | |
| 2026-05-31 06:00 | 121731 | | |
| 2026-05-31 05:00 | 126325 | | |
| 2026-05-31 04:00 | 129262 | | |
| 2026-05-31 03:00 | 132725 | | |
| 2026-05-31 02:00 | 137206 | | |
| 2026-05-31 01:00 | 142081 | | |
| 2026-05-31 00:00 | 144569 | | |
| 2026-05-30 23:00 | 141456 | | |
| 2026-05-30 22:00 | 134706 | | |
| 2026-05-30 21:00 | 128256 | | |
| 2026-05-30 20:00 | 120350 | | |
| 2026-05-30 19:00 | 109894 | | |
| 2026-05-30 18:00 | 101638 | | |
| 2026-05-30 17:00 | 97650 | | |
| 2026-05-30 16:00 | 95862 | | |
| 2026-05-30 15:00 | 95669 | | |
| 2026-05-30 14:00 | 97188 | | |
| 2026-05-30 13:00 | 99944 | | |
| 2026-05-30 12:00 | 103806 | | |
| 2026-05-30 11:00 | 108263 | | |
| 2026-05-30 10:00 | 111669 | | |
| 2026-05-30 09:00 | 111719 | | |
| 2026-05-30 08:00 | 109275 | | |
| 2026-05-30 07:00 | 108956 | | |
| 2026-05-30 06:00 | 111537 | | |
| 2026-05-30 05:00 | 114044 | | |
| 2026-05-30 04:00 | 115975 | | |
| 2026-05-30 03:00 | 118725 | | |
| 2026-05-30 02:00 | 123725 | | |
| 2026-05-30 01:00 | 131363 | | |
| 2026-05-30 00:00 | 138681 | | |
| 2026-05-29 23:00 | 141044 | | |
| 2026-05-29 22:00 | 138494 | | |
| 2026-05-29 21:00 | 134713 | | |
| 2026-05-29 20:00 | 129062 | | |
| 2026-05-29 19:00 | 118656 | | |
| 2026-05-29 18:00 | 106506 | | |
| 2026-05-29 17:00 | 98600 | | |
| 2026-05-29 16:00 | 95944 | | |
| 2026-05-29 15:00 | 96263 | | |
| 2026-05-29 14:00 | 97831 | | |
| 2026-05-29 13:00 | 97656 | | |
| 2026-05-29 12:00 | 92444 | | |
| 2026-05-29 11:00 | 84450 | | |
| 2026-05-29 10:00 | 80075 | | |
| 2026-05-29 09:00 | 81069 | | |
| 2026-05-29 08:00 | 84750 | | |
| 2026-05-29 07:00 | 89544 | | |
| 2026-05-29 06:00 | 95138 | | |
| 2026-05-29 05:00 | 102869 | | |
| 2026-05-29 04:00 | 112987 | | |
| 2026-05-29 03:00 | 120963 | | |
| 2026-05-29 02:00 | 125375 | | |
| 2026-05-29 01:00 | 131238 | | |
| 2026-05-29 00:00 | 139588 | | |
| 2026-05-28 23:00 | 145531 | | |
| 2026-05-28 22:00 | 148019 | | |
| 2026-05-28 21:00 | 151963 | | |
| 2026-05-28 20:00 | 158344 | | |
| 2026-05-28 19:00 | 163119 | | |
| 2026-05-28 18:00 | 166713 | | |
| 2026-05-28 17:00 | 172106 | | |
| 2026-05-28 16:00 | 177650 | | |
| 2026-05-28 15:00 | 178912 | | |
| 2026-05-28 14:00 | 173062 | | |
| 2026-05-28 13:00 | 160606 | | |
| 2026-05-28 12:00 | 144912 | | |
| 2026-05-28 11:00 | 129387 | | |
| 2026-05-28 10:00 | 116150 | | |
| 2026-05-28 09:00 | 107619 | | |
| 2026-05-28 08:00 | 107188 | | |
| 2026-05-28 07:00 | 116100 | | |
| 2026-05-28 06:00 | 128956 | | |
| 2026-05-28 05:00 | 138694 | | |
| 2026-05-28 04:00 | 144831 | | |
| 2026-05-28 03:00 | 150037 | | |
| 2026-05-28 02:00 | 153162 | | |
| 2026-05-28 01:00 | 150838 | | |
| 2026-05-28 00:00 | 145869 | | |
| 2026-05-27 23:00 | 145256 | | |
| 2026-05-27 22:00 | 149750 | | |
| 2026-05-27 21:00 | 154969 | | |
| 2026-05-27 20:00 | 155869 | | |
| 2026-05-27 19:00 | 148575 | | |
| 2026-05-27 18:00 | 135500 | | |
| 2026-05-27 17:00 | 122881 | | |
| 2026-05-27 16:00 | 113144 | | |
| 2026-05-27 15:00 | 106188 | | |
| 2026-05-27 14:00 | 101112 | | |
| 2026-05-27 13:00 | 96162 | | |
| 2026-05-27 12:00 | 92388 | | |
| 2026-05-27 11:00 | 91806 | | |
| 2026-05-27 10:00 | 93775 | | |
| 2026-05-27 09:00 | 98069 | | |
| 2026-05-27 08:00 | 105319 | | |
| 2026-05-27 07:00 | 111044 | | |
| 2026-05-27 06:00 | 109200 | | |
| 2026-05-27 05:00 | 103856 | | |
| 2026-05-27 04:00 | 103425 | | |
| 2026-05-27 03:00 | 107394 | | |
| 2026-05-27 02:00 | 111862 | | |
| 2026-05-27 01:00 | 117938 | | |
| 2026-05-27 00:00 | 126106 | | |
| 2026-05-26 23:00 | 132250 | | |
| 2026-05-26 22:00 | 134956 | | |
| 2026-05-26 21:00 | 137262 | | |
| 2026-05-26 20:00 | 137156 | | |
| 2026-05-26 19:00 | 130281 | | |
| 2026-05-26 18:00 | 121594 | | |
| 2026-05-26 17:00 | 119931 | | |
| 2026-05-26 16:00 | 126500 | | |
| 2026-05-26 15:00 | 136656 | | |
| 2026-05-26 14:00 | 145031 | | |
| 2026-05-26 13:00 | 145650 | | |
| 2026-05-26 12:00 | 136425 | | |
| 2026-05-26 11:00 | 123356 | | |
| 2026-05-26 10:00 | 112725 | | |
| 2026-05-26 09:00 | 105475 | | |
| 2026-05-26 08:00 | 101194 | | |
| 2026-05-26 07:00 | 98987 | | |
| 2026-05-26 06:00 | 96456 | | |
| 2026-05-26 05:00 | 93706 | | |
| 2026-05-26 04:00 | 93812 | | |
| 2026-05-26 03:00 | 97506 | | |
| 2026-05-26 02:00 | 103331 | | |
| 2026-05-26 01:00 | 109556 | | |
| 2026-05-26 00:00 | 113963 | | |
| 2026-05-25 23:00 | 116112 | | |
| 2026-05-25 22:00 | 118669 | | |
| 2026-05-25 21:00 | 124081 | | |
| 2026-05-25 20:00 | 128019 | | |
| 2026-05-25 19:00 | 123581 | | |
| 2026-05-25 18:00 | 115031 | | |
| 2026-05-25 17:00 | 112050 | | |