COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-07-12 01:00 | 83394 | | |
| 2026-07-12 00:00 | 94794 | | |
| 2026-07-11 23:00 | 108656 | | |
| 2026-07-11 22:00 | 124375 | | |
| 2026-07-11 21:00 | 141613 | | |
| 2026-07-11 20:00 | 156694 | | |
| 2026-07-11 19:00 | 163931 | | |
| 2026-07-11 18:00 | 162356 | | |
| 2026-07-11 17:00 | 154919 | | |
| 2026-07-11 16:00 | 144925 | | |
| 2026-07-11 15:00 | 136256 | | |
| 2026-07-11 14:00 | 130150 | | |
| 2026-07-11 13:00 | 123881 | | |
| 2026-07-11 12:00 | 116800 | | |
| 2026-07-11 11:00 | 111638 | | |
| 2026-07-11 10:00 | 107800 | | |
| 2026-07-11 09:00 | 101825 | | |
| 2026-07-11 08:00 | 93444 | | |
| 2026-07-11 07:00 | 83606 | | |
| 2026-07-11 06:00 | 73050 | | |
| 2026-07-11 05:00 | 65031 | | |
| 2026-07-11 04:00 | 61825 | | |
| 2026-07-11 03:00 | 62450 | | |
| 2026-07-11 02:00 | 66200 | | |
| 2026-07-11 01:00 | 73925 | | |
| 2026-07-11 00:00 | 87519 | | |
| 2026-07-10 23:00 | 107950 | | |
| 2026-07-10 22:00 | 131512 | | |
| 2026-07-10 21:00 | 150925 | | |
| 2026-07-10 20:00 | 161406 | | |
| 2026-07-10 19:00 | 162731 | | |
| 2026-07-10 18:00 | 157644 | | |
| 2026-07-10 17:00 | 151469 | | |
| 2026-07-10 16:00 | 149181 | | |
| 2026-07-10 15:00 | 151575 | | |
| 2026-07-10 14:00 | 154825 | | |
| 2026-07-10 13:00 | 153838 | | |
| 2026-07-10 12:00 | 147162 | | |
| 2026-07-10 11:00 | 135144 | | |
| 2026-07-10 10:00 | 117562 | | |
| 2026-07-10 09:00 | 97394 | | |
| 2026-07-10 08:00 | 78844 | | |
| 2026-07-10 07:00 | 63981 | | |
| 2026-07-10 06:00 | 55419 | | |
| 2026-07-10 05:00 | 53944 | | |
| 2026-07-10 04:00 | 56581 | | |
| 2026-07-10 03:00 | 62675 | | |
| 2026-07-10 02:00 | 72431 | | |
| 2026-07-10 01:00 | 83031 | | |
| 2026-07-10 00:00 | 94950 | | |
| 2026-07-09 23:00 | 111625 | | |
| 2026-07-09 22:00 | 131363 | | |
| 2026-07-09 21:00 | 148194 | | |
| 2026-07-09 20:00 | 157812 | | |
| 2026-07-09 19:00 | 160662 | | |
| 2026-07-09 18:00 | 159994 | | |
| 2026-07-09 17:00 | 157088 | | |
| 2026-07-09 16:00 | 152681 | | |
| 2026-07-09 15:00 | 148769 | | |
| 2026-07-09 14:00 | 144256 | | |
| 2026-07-09 13:00 | 135356 | | |
| 2026-07-09 12:00 | 121069 | | |
| 2026-07-09 11:00 | 105275 | | |
| 2026-07-09 10:00 | 93294 | | |
| 2026-07-09 09:00 | 86556 | | |
| 2026-07-09 08:00 | 81156 | | |
| 2026-07-09 07:00 | 72194 | | |
| 2026-07-09 06:00 | 60825 | | |
| 2026-07-09 05:00 | 53056 | | |
| 2026-07-09 04:00 | 51419 | | |
| 2026-07-09 03:00 | 54725 | | |
| 2026-07-09 02:00 | 63100 | | |
| 2026-07-09 01:00 | 76688 | | |
| 2026-07-09 00:00 | 92463 | | |
| 2026-07-08 23:00 | 107094 | | |
| 2026-07-08 22:00 | 119819 | | |
| 2026-07-08 21:00 | 130125 | | |
| 2026-07-08 20:00 | 136025 | | |
| 2026-07-08 19:00 | 136831 | | |
| 2026-07-08 18:00 | 134819 | | |
| 2026-07-08 17:00 | 131088 | | |
| 2026-07-08 16:00 | 124969 | | |
| 2026-07-08 15:00 | 116425 | | |
| 2026-07-08 14:00 | 105294 | | |
| 2026-07-08 13:00 | 93644 | | |
| 2026-07-08 12:00 | 85037 | | |
| 2026-07-08 11:00 | 79231 | | |
| 2026-07-08 10:00 | 73812 | | |
| 2026-07-08 09:00 | 69569 | | |
| 2026-07-08 08:00 | 69356 | | |
| 2026-07-08 07:00 | 72156 | | |
| 2026-07-08 06:00 | 74213 | | |
| 2026-07-08 05:00 | 74537 | | |
| 2026-07-08 04:00 | 74362 | | |
| 2026-07-08 03:00 | 75106 | | |
| 2026-07-08 02:00 | 76544 | | |
| 2026-07-08 01:00 | 76562 | | |
| 2026-07-08 00:00 | 77031 | | |
| 2026-07-07 23:00 | 82938 | | |
| 2026-07-07 22:00 | 94094 | | |
| 2026-07-07 21:00 | 106925 | | |
| 2026-07-07 20:00 | 119812 | | |
| 2026-07-07 19:00 | 131450 | | |
| 2026-07-07 18:00 | 138900 | | |
| 2026-07-07 17:00 | 139919 | | |
| 2026-07-07 16:00 | 136713 | | |
| 2026-07-07 15:00 | 132281 | | |
| 2026-07-07 14:00 | 125906 | | |
| 2026-07-07 13:00 | 118731 | | |
| 2026-07-07 12:00 | 114088 | | |
| 2026-07-07 11:00 | 111169 | | |
| 2026-07-07 10:00 | 107025 | | |
| 2026-07-07 09:00 | 99994 | | |
| 2026-07-07 08:00 | 89025 | | |
| 2026-07-07 07:00 | 74619 | | |
| 2026-07-07 06:00 | 61138 | | |
| 2026-07-07 05:00 | 54519 | | |
| 2026-07-07 04:00 | 56256 | | |
| 2026-07-07 03:00 | 62719 | | |
| 2026-07-07 02:00 | 69381 | | |
| 2026-07-07 01:00 | 75469 | | |
| 2026-07-07 00:00 | 84463 | | |
| 2026-07-06 23:00 | 97719 | | |
| 2026-07-06 22:00 | 113575 | | |
| 2026-07-06 21:00 | 130412 | | |
| 2026-07-06 20:00 | 143069 | | |
| 2026-07-06 19:00 | 145675 | | |
| 2026-07-06 18:00 | 139363 | | |
| 2026-07-06 17:00 | 128581 | | |
| 2026-07-06 16:00 | 115344 | | |
| 2026-07-06 15:00 | 101562 | | |
| 2026-07-06 14:00 | 90825 | | |
| 2026-07-06 13:00 | 84919 | | |
| 2026-07-06 12:00 | 81681 | | |
| 2026-07-06 11:00 | 78500 | | |
| 2026-07-06 10:00 | 75381 | | |
| 2026-07-06 09:00 | 73362 | | |
| 2026-07-06 08:00 | 72938 | | |
| 2026-07-06 07:00 | 73575 | | |
| 2026-07-06 06:00 | 74206 | | |
| 2026-07-06 05:00 | 74581 | | |
| 2026-07-06 04:00 | 75100 | | |
| 2026-07-06 03:00 | 77194 | | |
| 2026-07-06 02:00 | 84206 | | |
| 2026-07-06 01:00 | 98175 | | |
| 2026-07-06 00:00 | 115287 | | |
| 2026-07-05 23:00 | 128600 | | |
| 2026-07-05 22:00 | 135500 | | |
| 2026-07-05 21:00 | 138731 | | |
| 2026-07-05 20:00 | 140431 | | |
| 2026-07-05 19:00 | 138894 | | |
| 2026-07-05 18:00 | 131931 | | |
| 2026-07-05 17:00 | 121444 | | |
| 2026-07-05 16:00 | 112662 | | |
| 2026-07-05 15:00 | 108388 | | |
| 2026-07-05 14:00 | 107075 | | |
| 2026-07-05 13:00 | 106756 | | |
| 2026-07-05 12:00 | 106475 | | |
| 2026-07-05 11:00 | 105031 | | |
| 2026-07-05 10:00 | 102206 | | |
| 2026-07-05 09:00 | 99594 | | |
| 2026-07-05 08:00 | 98513 | | |
| 2026-07-05 07:00 | 98569 | | |
| 2026-07-05 06:00 | 98812 | | |
| 2026-07-05 05:00 | 99456 | | |
| 2026-07-05 04:00 | 101600 | | |
| 2026-07-05 03:00 | 105550 | | |
| 2026-07-05 02:00 | 110312 | | |
| 2026-07-05 01:00 | 115400 | | |
| 2026-07-05 00:00 | 120912 | | |
| 2026-07-04 23:00 | 125131 | | |
| 2026-07-04 22:00 | 126944 | | |
| 2026-07-04 21:00 | 128312 | | |
| 2026-07-04 20:00 | 129769 | | |
| 2026-07-04 19:00 | 129812 | | |
| 2026-07-04 18:00 | 129094 | | |
| 2026-07-04 17:00 | 128300 | | |
| 2026-07-04 16:00 | 126162 | | |
| 2026-07-04 15:00 | 123700 | | |
| 2026-07-04 14:00 | 123838 | | |
| 2026-07-04 13:00 | 125969 | | |
| 2026-07-04 12:00 | 126763 | | |
| 2026-07-04 11:00 | 124644 | | |
| 2026-07-04 10:00 | 120100 | | |
| 2026-07-04 09:00 | 114106 | | |
| 2026-07-04 08:00 | 108575 | | |
| 2026-07-04 07:00 | 105769 | | |
| 2026-07-04 06:00 | 105606 | | |
| 2026-07-04 05:00 | 106150 | | |
| 2026-07-04 04:00 | 106388 | | |
| 2026-07-04 03:00 | 106175 | | |
| 2026-07-04 02:00 | 106850 | | |
| 2026-07-04 01:00 | 113100 | | |
| 2026-07-04 00:00 | 125975 | | |
| 2026-07-03 23:00 | 138269 | | |
| 2026-07-03 22:00 | 144806 | | |
| 2026-07-03 21:00 | 146688 | | |
| 2026-07-03 20:00 | 146213 | | |
| 2026-07-03 19:00 | 145200 | | |
| 2026-07-03 18:00 | 143537 | | |
| 2026-07-03 17:00 | 140406 | | |
| 2026-07-03 16:00 | 137438 | | |
| 2026-07-03 15:00 | 137869 | | |
| 2026-07-03 14:00 | 142450 | | |
| 2026-07-03 13:00 | 148069 | | |
| 2026-07-03 12:00 | 152762 | | |
| 2026-07-03 11:00 | 155606 | | |
| 2026-07-03 10:00 | 152544 | | |
| 2026-07-03 09:00 | 142206 | | |
| 2026-07-03 08:00 | 129200 | | |
| 2026-07-03 07:00 | 117662 | | |
| 2026-07-03 06:00 | 109162 | | |
| 2026-07-03 05:00 | 102513 | | |
| 2026-07-03 04:00 | 95281 | | |
| 2026-07-03 03:00 | 90162 | | |
| 2026-07-03 02:00 | 92594 | | |
| 2026-07-03 01:00 | 103050 | | |
| 2026-07-03 00:00 | 117381 | | |
| 2026-07-02 23:00 | 131056 | | |
| 2026-07-02 22:00 | 141581 | | |
| 2026-07-02 21:00 | 147194 | | |
| 2026-07-02 20:00 | 146225 | | |
| 2026-07-02 19:00 | 140800 | | |
| 2026-07-02 18:00 | 136006 | | |
| 2026-07-02 17:00 | 134044 | | |
| 2026-07-02 16:00 | 134062 | | |
| 2026-07-02 15:00 | 135581 | | |
| 2026-07-02 14:00 | 136650 | | |
| 2026-07-02 13:00 | 133656 | | |
| 2026-07-02 12:00 | 127675 | | |
| 2026-07-02 11:00 | 123444 | | |
| 2026-07-02 10:00 | 122456 | | |
| 2026-07-02 09:00 | 123850 | | |
| 2026-07-02 08:00 | 126519 | | |
| 2026-07-02 07:00 | 127950 | | |
| 2026-07-02 06:00 | 125912 | | |
| 2026-07-02 05:00 | 121869 | | |
| 2026-07-02 04:00 | 119925 | | |
| 2026-07-02 03:00 | 121638 | | |
| 2026-07-02 02:00 | 125094 | | |
| 2026-07-02 01:00 | 128750 | | |
| 2026-07-02 00:00 | 133506 | | |
| 2026-07-01 23:00 | 139488 | | |
| 2026-07-01 22:00 | 143412 | | |
| 2026-07-01 21:00 | 142287 | | |
| 2026-07-01 20:00 | 137175 | | |
| 2026-07-01 19:00 | 132875 | | |
| 2026-07-01 18:00 | 132838 | | |
| 2026-07-01 17:00 | 135494 | | |