COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-06-20 23:00 | 111325 | | |
| 2026-06-20 22:00 | 112875 | | |
| 2026-06-20 21:00 | 114494 | | |
| 2026-06-20 20:00 | 116556 | | |
| 2026-06-20 19:00 | 116037 | | |
| 2026-06-20 18:00 | 108900 | | |
| 2026-06-20 17:00 | 94706 | | |
| 2026-06-20 16:00 | 78562 | | |
| 2026-06-20 15:00 | 67369 | | |
| 2026-06-20 14:00 | 63169 | | |
| 2026-06-20 13:00 | 62519 | | |
| 2026-06-20 12:00 | 61925 | | |
| 2026-06-20 11:00 | 60763 | | |
| 2026-06-20 10:00 | 59981 | | |
| 2026-06-20 09:00 | 61619 | | |
| 2026-06-20 08:00 | 67350 | | |
| 2026-06-20 07:00 | 73981 | | |
| 2026-06-20 06:00 | 75019 | | |
| 2026-06-20 05:00 | 70106 | | |
| 2026-06-20 04:00 | 66206 | | |
| 2026-06-20 03:00 | 68162 | | |
| 2026-06-20 02:00 | 75556 | | |
| 2026-06-20 01:00 | 87312 | | |
| 2026-06-20 00:00 | 102875 | | |
| 2026-06-19 23:00 | 119756 | | |
| 2026-06-19 22:00 | 136750 | | |
| 2026-06-19 21:00 | 155769 | | |
| 2026-06-19 20:00 | 173181 | | |
| 2026-06-19 19:00 | 180544 | | |
| 2026-06-19 18:00 | 176506 | | |
| 2026-06-19 17:00 | 166137 | | |
| 2026-06-19 16:00 | 153688 | | |
| 2026-06-19 15:00 | 142100 | | |
| 2026-06-19 14:00 | 133019 | | |
| 2026-06-19 13:00 | 126644 | | |
| 2026-06-19 12:00 | 122194 | | |
| 2026-06-19 11:00 | 117569 | | |
| 2026-06-19 10:00 | 111025 | | |
| 2026-06-19 09:00 | 104725 | | |
| 2026-06-19 08:00 | 105237 | | |
| 2026-06-19 07:00 | 114206 | | |
| 2026-06-19 06:00 | 123513 | | |
| 2026-06-19 05:00 | 127619 | | |
| 2026-06-19 04:00 | 130181 | | |
| 2026-06-19 03:00 | 136119 | | |
| 2026-06-19 02:00 | 145150 | | |
| 2026-06-19 01:00 | 152738 | | |
| 2026-06-19 00:00 | 156119 | | |
| 2026-06-18 23:00 | 156519 | | |
| 2026-06-18 22:00 | 156525 | | |
| 2026-06-18 21:00 | 158656 | | |
| 2026-06-18 20:00 | 162175 | | |
| 2026-06-18 19:00 | 162775 | | |
| 2026-06-18 18:00 | 157963 | | |
| 2026-06-18 17:00 | 148988 | | |
| 2026-06-18 16:00 | 138931 | | |
| 2026-06-18 15:00 | 129963 | | |
| 2026-06-18 14:00 | 121737 | | |
| 2026-06-18 13:00 | 114119 | | |
| 2026-06-18 12:00 | 108494 | | |
| 2026-06-18 11:00 | 104069 | | |
| 2026-06-18 10:00 | 98500 | | |
| 2026-06-18 09:00 | 93550 | | |
| 2026-06-18 08:00 | 94319 | | |
| 2026-06-18 07:00 | 101781 | | |
| 2026-06-18 06:00 | 108356 | | |
| 2026-06-18 05:00 | 107819 | | |
| 2026-06-18 04:00 | 106081 | | |
| 2026-06-18 03:00 | 109956 | | |
| 2026-06-18 02:00 | 116256 | | |
| 2026-06-18 01:00 | 120219 | | |
| 2026-06-18 00:00 | 123069 | | |
| 2026-06-17 23:00 | 127781 | | |
| 2026-06-17 22:00 | 133844 | | |
| 2026-06-17 21:00 | 137363 | | |
| 2026-06-17 20:00 | 133225 | | |
| 2026-06-17 19:00 | 120744 | | |
| 2026-06-17 18:00 | 107675 | | |
| 2026-06-17 17:00 | 101763 | | |
| 2026-06-17 16:00 | 100963 | | |
| 2026-06-17 15:00 | 99219 | | |
| 2026-06-17 14:00 | 96412 | | |
| 2026-06-17 13:00 | 95575 | | |
| 2026-06-17 12:00 | 96219 | | |
| 2026-06-17 11:00 | 95775 | | |
| 2026-06-17 10:00 | 93394 | | |
| 2026-06-17 09:00 | 89894 | | |
| 2026-06-17 08:00 | 87094 | | |
| 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 | | |