COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-06-17 07:00 | 86094 | | |
| 2026-06-17 06:00 | 84537 | | |
| 2026-06-17 05:00 | 80188 | | |
| 2026-06-17 04:00 | 75281 | | |
| 2026-06-17 03:00 | 74331 | | |
| 2026-06-17 02:00 | 80338 | | |
| 2026-06-17 01:00 | 92463 | | |
| 2026-06-17 00:00 | 107781 | | |
| 2026-06-16 23:00 | 124138 | | |
| 2026-06-16 22:00 | 139875 | | |
| 2026-06-16 21:00 | 152575 | | |
| 2026-06-16 20:00 | 159606 | | |
| 2026-06-16 19:00 | 160644 | | |
| 2026-06-16 18:00 | 156181 | | |
| 2026-06-16 17:00 | 146144 | | |
| 2026-06-16 16:00 | 133131 | | |
| 2026-06-16 15:00 | 121531 | | |
| 2026-06-16 14:00 | 113194 | | |
| 2026-06-16 13:00 | 106656 | | |
| 2026-06-16 12:00 | 100200 | | |
| 2026-06-16 11:00 | 94513 | | |
| 2026-06-16 10:00 | 91250 | | |
| 2026-06-16 09:00 | 91231 | | |
| 2026-06-16 08:00 | 95731 | | |
| 2026-06-16 07:00 | 104112 | | |
| 2026-06-16 06:00 | 110825 | | |
| 2026-06-16 05:00 | 113700 | | |
| 2026-06-16 04:00 | 118862 | | |
| 2026-06-16 03:00 | 130119 | | |
| 2026-06-16 02:00 | 143481 | | |
| 2026-06-16 01:00 | 153844 | | |
| 2026-06-16 00:00 | 159194 | | |
| 2026-06-15 23:00 | 160075 | | |
| 2026-06-15 22:00 | 160119 | | |
| 2026-06-15 21:00 | 163356 | | |
| 2026-06-15 20:00 | 167731 | | |
| 2026-06-15 19:00 | 168831 | | |
| 2026-06-15 18:00 | 167025 | | |
| 2026-06-15 17:00 | 164131 | | |
| 2026-06-15 16:00 | 161900 | | |
| 2026-06-15 15:00 | 161925 | | |
| 2026-06-15 14:00 | 162619 | | |
| 2026-06-15 13:00 | 162075 | | |
| 2026-06-15 12:00 | 158512 | | |
| 2026-06-15 11:00 | 148506 | | |
| 2026-06-15 10:00 | 132519 | | |
| 2026-06-15 09:00 | 117881 | | |
| 2026-06-15 08:00 | 113562 | | |
| 2026-06-15 07:00 | 121144 | | |
| 2026-06-15 06:00 | 132088 | | |
| 2026-06-15 05:00 | 139525 | | |
| 2026-06-15 04:00 | 145425 | | |
| 2026-06-15 03:00 | 152000 | | |
| 2026-06-15 02:00 | 158900 | | |
| 2026-06-15 01:00 | 167281 | | |
| 2026-06-15 00:00 | 176994 | | |
| 2026-06-14 23:00 | 184531 | | |
| 2026-06-14 22:00 | 187213 | | |
| 2026-06-14 21:00 | 186119 | | |
| 2026-06-14 20:00 | 183262 | | |
| 2026-06-14 19:00 | 178488 | | |
| 2026-06-14 18:00 | 171069 | | |
| 2026-06-14 17:00 | 162469 | | |
| 2026-06-14 16:00 | 155356 | | |
| 2026-06-14 15:00 | 149894 | | |
| 2026-06-14 14:00 | 144375 | | |
| 2026-06-14 13:00 | 138250 | | |
| 2026-06-14 12:00 | 131019 | | |
| 2026-06-14 11:00 | 122131 | | |
| 2026-06-14 10:00 | 112850 | | |
| 2026-06-14 09:00 | 105531 | | |
| 2026-06-14 08:00 | 103756 | | |
| 2026-06-14 07:00 | 110406 | | |
| 2026-06-14 06:00 | 122594 | | |
| 2026-06-14 05:00 | 134938 | | |
| 2026-06-14 04:00 | 146319 | | |
| 2026-06-14 03:00 | 157262 | | |
| 2026-06-14 02:00 | 166100 | | |
| 2026-06-14 01:00 | 172062 | | |
| 2026-06-14 00:00 | 177525 | | |
| 2026-06-13 23:00 | 184306 | | |
| 2026-06-13 22:00 | 190331 | | |
| 2026-06-13 21:00 | 192450 | | |
| 2026-06-13 20:00 | 189950 | | |
| 2026-06-13 19:00 | 184050 | | |
| 2026-06-13 18:00 | 174944 | | |
| 2026-06-13 17:00 | 161831 | | |
| 2026-06-13 16:00 | 147569 | | |
| 2026-06-13 15:00 | 136100 | | |
| 2026-06-13 14:00 | 126562 | | |
| 2026-06-13 13:00 | 117100 | | |
| 2026-06-13 12:00 | 109106 | | |
| 2026-06-13 11:00 | 103838 | | |
| 2026-06-13 10:00 | 99975 | | |
| 2026-06-13 09:00 | 98019 | | |
| 2026-06-13 08:00 | 101925 | | |
| 2026-06-13 07:00 | 112050 | | |
| 2026-06-13 06:00 | 122906 | | |
| 2026-06-13 05:00 | 130725 | | |
| 2026-06-13 04:00 | 136262 | | |
| 2026-06-13 03:00 | 141088 | | |
| 2026-06-13 02:00 | 146381 | | |
| 2026-06-13 01:00 | 152619 | | |
| 2026-06-13 00:00 | 159106 | | |
| 2026-06-12 23:00 | 164569 | | |
| 2026-06-12 22:00 | 168012 | | |
| 2026-06-12 21:00 | 169931 | | |
| 2026-06-12 20:00 | 171025 | | |
| 2026-06-12 19:00 | 171006 | | |
| 2026-06-12 18:00 | 169994 | | |
| 2026-06-12 17:00 | 167094 | | |
| 2026-06-12 16:00 | 160419 | | |
| 2026-06-12 15:00 | 151375 | | |
| 2026-06-12 14:00 | 143262 | | |
| 2026-06-12 13:00 | 136338 | | |
| 2026-06-12 12:00 | 128988 | | |
| 2026-06-12 11:00 | 121575 | | |
| 2026-06-12 10:00 | 116319 | | |
| 2026-06-12 09:00 | 115162 | | |
| 2026-06-12 08:00 | 118656 | | |
| 2026-06-12 07:00 | 123625 | | |
| 2026-06-12 06:00 | 123581 | | |
| 2026-06-12 05:00 | 116312 | | |
| 2026-06-12 04:00 | 107006 | | |
| 2026-06-12 03:00 | 101806 | | |
| 2026-06-12 02:00 | 103000 | | |
| 2026-06-12 01:00 | 109713 | | |
| 2026-06-12 00:00 | 120469 | | |
| 2026-06-11 23:00 | 133650 | | |
| 2026-06-11 22:00 | 146188 | | |
| 2026-06-11 21:00 | 155031 | | |
| 2026-06-11 20:00 | 158431 | | |
| 2026-06-11 19:00 | 155750 | | |
| 2026-06-11 18:00 | 148144 | | |
| 2026-06-11 17:00 | 137375 | | |
| 2026-06-11 16:00 | 125375 | | |
| 2026-06-11 15:00 | 115081 | | |
| 2026-06-11 14:00 | 108025 | | |
| 2026-06-11 13:00 | 103019 | | |
| 2026-06-11 12:00 | 99356 | | |
| 2026-06-11 11:00 | 98744 | | |
| 2026-06-11 10:00 | 102200 | | |
| 2026-06-11 09:00 | 107944 | | |
| 2026-06-11 08:00 | 112994 | | |
| 2026-06-11 07:00 | 113794 | | |
| 2026-06-11 06:00 | 108844 | | |
| 2026-06-11 05:00 | 102213 | | |
| 2026-06-11 04:00 | 99581 | | |
| 2026-06-11 03:00 | 102487 | | |
| 2026-06-11 02:00 | 109569 | | |
| 2026-06-11 01:00 | 120562 | | |
| 2026-06-11 00:00 | 133750 | | |
| 2026-06-10 23:00 | 143531 | | |
| 2026-06-10 22:00 | 147644 | | |
| 2026-06-10 21:00 | 149162 | | |
| 2026-06-10 20:00 | 149075 | | |
| 2026-06-10 19:00 | 144238 | | |
| 2026-06-10 18:00 | 133012 | | |
| 2026-06-10 17:00 | 119881 | | |
| 2026-06-10 16:00 | 111600 | | |
| 2026-06-10 15:00 | 109631 | | |
| 2026-06-10 14:00 | 108213 | | |
| 2026-06-10 13:00 | 100969 | | |
| 2026-06-10 12:00 | 90350 | | |
| 2026-06-10 11:00 | 85894 | | |
| 2026-06-10 10:00 | 92075 | | |
| 2026-06-10 09:00 | 104256 | | |
| 2026-06-10 08:00 | 115294 | | |
| 2026-06-10 07:00 | 120000 | | |
| 2026-06-10 06:00 | 116181 | | |
| 2026-06-10 05:00 | 106769 | | |
| 2026-06-10 04:00 | 98125 | | |
| 2026-06-10 03:00 | 94325 | | |
| 2026-06-10 02:00 | 96075 | | |
| 2026-06-10 01:00 | 102638 | | |
| 2026-06-10 00:00 | 112444 | | |
| 2026-06-09 23:00 | 123075 | | |
| 2026-06-09 22:00 | 131056 | | |
| 2026-06-09 21:00 | 133775 | | |
| 2026-06-09 20:00 | 130375 | | |
| 2026-06-09 19:00 | 120831 | | |
| 2026-06-09 18:00 | 107950 | | |
| 2026-06-09 17:00 | 97375 | | |
| 2026-06-09 16:00 | 93044 | | |
| 2026-06-09 15:00 | 94350 | | |
| 2026-06-09 14:00 | 98000 | | |
| 2026-06-09 13:00 | 102706 | | |
| 2026-06-09 12:00 | 108894 | | |
| 2026-06-09 11:00 | 114906 | | |
| 2026-06-09 10:00 | 119100 | | |
| 2026-06-09 09:00 | 121269 | | |
| 2026-06-09 08:00 | 121219 | | |
| 2026-06-09 07:00 | 119362 | | |
| 2026-06-09 06:00 | 115706 | | |
| 2026-06-09 05:00 | 111450 | | |
| 2026-06-09 04:00 | 111906 | | |
| 2026-06-09 03:00 | 120938 | | |
| 2026-06-09 02:00 | 134344 | | |
| 2026-06-09 01:00 | 145025 | | |
| 2026-06-09 00:00 | 152044 | | |
| 2026-06-08 23:00 | 156956 | | |
| 2026-06-08 22:00 | 158956 | | |
| 2026-06-08 21:00 | 159325 | | |
| 2026-06-08 20:00 | 160625 | | |
| 2026-06-08 19:00 | 162931 | | |
| 2026-06-08 18:00 | 164550 | | |
| 2026-06-08 17:00 | 164494 | | |
| 2026-06-08 16:00 | 163581 | | |
| 2026-06-08 15:00 | 161988 | | |
| 2026-06-08 14:00 | 158706 | | |
| 2026-06-08 13:00 | 153925 | | |
| 2026-06-08 12:00 | 150662 | | |
| 2026-06-08 11:00 | 151550 | | |
| 2026-06-08 10:00 | 154344 | | |
| 2026-06-08 09:00 | 155412 | | |
| 2026-06-08 08:00 | 153406 | | |
| 2026-06-08 07:00 | 148431 | | |
| 2026-06-08 06:00 | 143319 | | |
| 2026-06-08 05:00 | 142219 | | |
| 2026-06-08 04:00 | 145150 | | |
| 2026-06-08 03:00 | 149000 | | |
| 2026-06-08 02:00 | 152762 | | |
| 2026-06-08 01:00 | 157325 | | |
| 2026-06-08 00:00 | 162731 | | |
| 2026-06-07 23:00 | 167831 | | |
| 2026-06-07 22:00 | 171387 | | |
| 2026-06-07 21:00 | 172756 | | |
| 2026-06-07 20:00 | 169919 | | |
| 2026-06-07 19:00 | 159419 | | |
| 2026-06-07 18:00 | 143600 | | |
| 2026-06-07 17:00 | 131119 | | |
| 2026-06-07 16:00 | 125731 | | |
| 2026-06-07 15:00 | 124487 | | |
| 2026-06-07 14:00 | 124969 | | |
| 2026-06-07 13:00 | 126169 | | |
| 2026-06-07 12:00 | 127588 | | |
| 2026-06-07 11:00 | 129113 | | |
| 2026-06-07 10:00 | 128806 | | |
| 2026-06-07 09:00 | 125312 | | |
| 2026-06-07 08:00 | 123013 | | |
| 2026-06-07 07:00 | 126869 | | |
| 2026-06-07 06:00 | 133644 | | |
| 2026-06-07 05:00 | 137713 | | |
| 2026-06-07 04:00 | 139150 | | |
| 2026-06-07 03:00 | 140400 | | |
| 2026-06-07 02:00 | 143731 | | |
| 2026-06-07 01:00 | 150369 | | |
| 2026-06-07 00:00 | 158262 | | |
| 2026-06-06 23:00 | 164056 | | |
| 2026-06-06 22:00 | 167256 | | |
| 2026-06-06 21:00 | 169812 | | |
| 2026-06-06 20:00 | 170713 | | |
| 2026-06-06 19:00 | 167356 | | |
| 2026-06-06 18:00 | 161925 | | |
| 2026-06-06 17:00 | 157713 | | |