COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-03-12 17:00 | 114675 | | |
| 2026-03-12 16:00 | 107037 | | |
| 2026-03-12 15:00 | 104525 | | |
| 2026-03-12 14:00 | 104787 | | |
| 2026-03-12 13:00 | 105381 | | |
| 2026-03-12 12:00 | 105256 | | |
| 2026-03-12 11:00 | 104750 | | |
| 2026-03-12 10:00 | 106306 | | |
| 2026-03-12 09:00 | 110531 | | |
| 2026-03-12 08:00 | 114388 | | |
| 2026-03-12 07:00 | 116506 | | |
| 2026-03-12 06:00 | 118425 | | |
| 2026-03-12 05:00 | 120319 | | |
| 2026-03-12 04:00 | 121744 | | |
| 2026-03-12 03:00 | 124162 | | |
| 2026-03-12 02:00 | 126987 | | |
| 2026-03-12 01:00 | 126394 | | |
| 2026-03-12 00:00 | 122737 | | |
| 2026-03-11 23:00 | 121294 | | |
| 2026-03-11 22:00 | 124306 | | |
| 2026-03-11 21:00 | 128581 | | |
| 2026-03-11 20:00 | 129306 | | |
| 2026-03-11 19:00 | 125331 | | |
| 2026-03-11 18:00 | 121206 | | |
| 2026-03-11 17:00 | 121025 | | |
| 2026-03-11 16:00 | 123019 | | |
| 2026-03-11 15:00 | 125237 | | |
| 2026-03-11 14:00 | 129419 | | |
| 2026-03-11 13:00 | 134137 | | |
| 2026-03-11 12:00 | 135325 | | |
| 2026-03-11 11:00 | 133000 | | |
| 2026-03-11 10:00 | 129106 | | |
| 2026-03-11 09:00 | 125787 | | |
| 2026-03-11 08:00 | 124881 | | |
| 2026-03-11 07:00 | 124987 | | |
| 2026-03-11 06:00 | 124581 | | |
| 2026-03-11 05:00 | 125250 | | |
| 2026-03-11 04:00 | 128781 | | |
| 2026-03-11 03:00 | 133863 | | |
| 2026-03-11 02:00 | 136938 | | |
| 2026-03-11 01:00 | 136081 | | |
| 2026-03-11 00:00 | 132838 | | |
| 2026-03-10 23:00 | 130006 | | |
| 2026-03-10 22:00 | 129188 | | |
| 2026-03-10 21:00 | 130725 | | |
| 2026-03-10 20:00 | 132488 | | |
| 2026-03-10 19:00 | 129512 | | |
| 2026-03-10 18:00 | 119069 | | |
| 2026-03-10 17:00 | 104406 | | |
| 2026-03-10 16:00 | 92294 | | |
| 2026-03-10 15:00 | 87631 | | |
| 2026-03-10 14:00 | 90006 | | |
| 2026-03-10 13:00 | 96650 | | |
| 2026-03-10 12:00 | 106931 | | |
| 2026-03-10 11:00 | 120188 | | |
| 2026-03-10 10:00 | 132463 | | |
| 2026-03-10 09:00 | 139556 | | |
| 2026-03-10 08:00 | 141863 | | |
| 2026-03-10 07:00 | 143037 | | |
| 2026-03-10 06:00 | 143025 | | |
| 2026-03-10 05:00 | 139794 | | |
| 2026-03-10 04:00 | 137225 | | |
| 2026-03-10 03:00 | 139825 | | |
| 2026-03-10 02:00 | 145300 | | |
| 2026-03-10 01:00 | 150162 | | |
| 2026-03-10 00:00 | 154787 | | |
| 2026-03-09 23:00 | 159238 | | |
| 2026-03-09 22:00 | 161706 | | |
| 2026-03-09 21:00 | 162637 | | |
| 2026-03-09 20:00 | 161231 | | |
| 2026-03-09 19:00 | 151000 | | |
| 2026-03-09 18:00 | 129969 | | |
| 2026-03-09 17:00 | 108256 | | |
| 2026-03-09 16:00 | 95769 | | |
| 2026-03-09 15:00 | 91250 | | |
| 2026-03-09 14:00 | 89919 | | |
| 2026-03-09 13:00 | 92544 | | |
| 2026-03-09 12:00 | 101763 | | |
| 2026-03-09 11:00 | 116263 | | |
| 2026-03-09 10:00 | 132394 | | |
| 2026-03-09 09:00 | 145450 | | |
| 2026-03-09 08:00 | 150688 | | |
| 2026-03-09 07:00 | 147706 | | |
| 2026-03-09 06:00 | 138175 | | |
| 2026-03-09 05:00 | 124487 | | |
| 2026-03-09 04:00 | 112744 | | |
| 2026-03-09 03:00 | 107369 | | |
| 2026-03-09 02:00 | 108369 | | |
| 2026-03-09 01:00 | 115969 | | |
| 2026-03-09 00:00 | 129919 | | |
| 2026-03-08 23:00 | 145481 | | |
| 2026-03-08 22:00 | 156119 | | |
| 2026-03-08 21:00 | 158250 | | |
| 2026-03-08 20:00 | 148894 | | |
| 2026-03-08 19:00 | 127287 | | |
| 2026-03-08 18:00 | 101731 | | |
| 2026-03-08 17:00 | 82831 | | |
| 2026-03-08 16:00 | 73244 | | |
| 2026-03-08 15:00 | 71131 | | |
| 2026-03-08 14:00 | 73969 | | |
| 2026-03-08 13:00 | 77856 | | |
| 2026-03-08 12:00 | 80294 | | |
| 2026-03-08 11:00 | 82206 | | |
| 2026-03-08 10:00 | 86356 | | |
| 2026-03-08 09:00 | 93481 | | |
| 2026-03-08 08:00 | 99144 | | |
| 2026-03-08 07:00 | 99781 | | |
| 2026-03-08 06:00 | 99450 | | |
| 2026-03-08 05:00 | 102231 | | |
| 2026-03-08 04:00 | 107344 | | |
| 2026-03-08 03:00 | 114519 | | |
| 2026-03-08 01:00 | 120725 | | |
| 2026-03-08 00:00 | 120206 | | |
| 2026-03-07 23:00 | 115037 | | |
| 2026-03-07 22:00 | 112750 | | |
| 2026-03-07 21:00 | 115763 | | |
| 2026-03-07 20:00 | 119025 | | |
| 2026-03-07 19:00 | 115713 | | |
| 2026-03-07 18:00 | 105225 | | |
| 2026-03-07 18:00 | 92888 | | |
| 2026-03-07 17:00 | 82919 | | |
| 2026-03-07 16:00 | 76769 | | |
| 2026-03-07 15:00 | 75650 | | |
| 2026-03-07 14:00 | 79294 | | |
| 2026-03-07 13:00 | 84881 | | |
| 2026-03-07 12:00 | 89981 | | |
| 2026-03-07 11:00 | 92862 | | |
| 2026-03-07 10:00 | 91737 | | |
| 2026-03-07 09:00 | 89550 | | |
| 2026-03-07 08:00 | 92744 | | |
| 2026-03-07 07:00 | 101000 | | |
| 2026-03-07 06:00 | 108819 | | |
| 2026-03-07 05:00 | 114625 | | |
| 2026-03-07 04:00 | 119950 | | |
| 2026-03-07 03:00 | 125106 | | |
| 2026-03-07 02:00 | 127894 | | |
| 2026-03-07 01:00 | 125475 | | |
| 2026-03-07 00:00 | 118756 | | |
| 2026-03-06 23:00 | 113600 | | |
| 2026-03-06 22:00 | 114500 | | |
| 2026-03-06 21:00 | 119394 | | |
| 2026-03-06 20:00 | 124088 | | |
| 2026-03-06 19:00 | 125306 | | |
| 2026-03-06 18:00 | 120294 | | |
| 2026-03-06 17:00 | 111344 | | |
| 2026-03-06 16:00 | 105400 | | |
| 2026-03-06 15:00 | 105713 | | |
| 2026-03-06 14:00 | 110050 | | |
| 2026-03-06 13:00 | 114706 | | |
| 2026-03-06 12:00 | 117681 | | |
| 2026-03-06 11:00 | 120650 | | |
| 2026-03-06 10:00 | 125706 | | |
| 2026-03-06 09:00 | 132219 | | |
| 2026-03-06 08:00 | 138019 | | |
| 2026-03-06 07:00 | 141456 | | |
| 2026-03-06 06:00 | 143019 | | |
| 2026-03-06 05:00 | 143363 | | |
| 2026-03-06 04:00 | 143137 | | |
| 2026-03-06 03:00 | 145094 | | |
| 2026-03-06 02:00 | 150194 | | |
| 2026-03-06 01:00 | 154219 | | |
| 2026-03-06 00:00 | 152838 | | |
| 2026-03-05 23:00 | 148887 | | |
| 2026-03-05 22:00 | 148106 | | |
| 2026-03-05 21:00 | 148375 | | |
| 2026-03-05 20:00 | 141600 | | |
| 2026-03-05 19:00 | 124800 | | |
| 2026-03-05 18:00 | 105138 | | |
| 2026-03-05 17:00 | 92550 | | |
| 2026-03-05 16:00 | 89169 | | |
| 2026-03-05 15:00 | 90325 | | |
| 2026-03-05 14:00 | 92694 | | |
| 2026-03-05 13:00 | 96412 | | |
| 2026-03-05 12:00 | 100963 | | |
| 2026-03-05 11:00 | 104831 | | |
| 2026-03-05 10:00 | 110956 | | |
| 2026-03-05 09:00 | 123081 | | |
| 2026-03-05 08:00 | 136275 | | |
| 2026-03-05 07:00 | 142556 | | |
| 2026-03-05 06:00 | 140438 | | |
| 2026-03-05 05:00 | 134625 | | |
| 2026-03-05 04:00 | 132100 | | |
| 2026-03-05 03:00 | 135231 | | |
| 2026-03-05 02:00 | 141088 | | |
| 2026-03-05 01:00 | 147338 | | |
| 2026-03-05 00:00 | 151156 | | |
| 2026-03-04 23:00 | 149363 | | |
| 2026-03-04 22:00 | 144175 | | |
| 2026-03-04 21:00 | 139900 | | |
| 2026-03-04 20:00 | 134037 | | |
| 2026-03-04 19:00 | 120794 | | |
| 2026-03-04 18:00 | 102850 | | |
| 2026-03-04 17:00 | 89131 | | |
| 2026-03-04 16:00 | 83500 | | |
| 2026-03-04 15:00 | 84769 | | |
| 2026-03-04 14:00 | 90112 | | |
| 2026-03-04 13:00 | 96150 | | |
| 2026-03-04 12:00 | 101756 | | |
| 2026-03-04 11:00 | 107156 | | |
| 2026-03-04 10:00 | 112706 | | |
| 2026-03-04 09:00 | 118931 | | |
| 2026-03-04 08:00 | 123631 | | |
| 2026-03-04 07:00 | 122875 | | |
| 2026-03-04 06:00 | 118487 | | |
| 2026-03-04 05:00 | 116944 | | |
| 2026-03-04 04:00 | 119763 | | |
| 2026-03-04 03:00 | 123369 | | |
| 2026-03-04 02:00 | 124775 | | |
| 2026-03-04 01:00 | 124438 | | |
| 2026-03-04 00:00 | 126156 | | |
| 2026-03-03 23:00 | 132525 | | |
| 2026-03-03 22:00 | 141619 | | |
| 2026-03-03 21:00 | 150113 | | |
| 2026-03-03 20:00 | 154575 | | |
| 2026-03-03 19:00 | 147631 | | |
| 2026-03-03 18:00 | 125194 | | |
| 2026-03-03 17:00 | 98494 | | |
| 2026-03-03 16:00 | 83375 | | |
| 2026-03-03 15:00 | 81856 | | |
| 2026-03-03 14:00 | 86181 | | |
| 2026-03-03 13:00 | 91013 | | |
| 2026-03-03 12:00 | 94469 | | |
| 2026-03-03 11:00 | 97269 | | |
| 2026-03-03 10:00 | 103463 | | |
| 2026-03-03 09:00 | 114688 | | |
| 2026-03-03 08:00 | 124906 | | |
| 2026-03-03 07:00 | 127825 | | |
| 2026-03-03 06:00 | 125175 | | |
| 2026-03-03 05:00 | 122188 | | |
| 2026-03-03 04:00 | 121281 | | |
| 2026-03-03 03:00 | 120388 | | |
| 2026-03-03 02:00 | 114869 | | |
| 2026-03-03 01:00 | 105669 | | |
| 2026-03-03 00:00 | 99963 | | |
| 2026-03-02 23:00 | 101081 | | |
| 2026-03-02 22:00 | 106900 | | |
| 2026-03-02 21:00 | 112294 | | |
| 2026-03-02 20:00 | 109594 | | |
| 2026-03-02 19:00 | 96419 | | |
| 2026-03-02 18:00 | 78706 | | |
| 2026-03-02 17:00 | 64275 | | |
| 2026-03-02 16:00 | 58319 | | |
| 2026-03-02 15:00 | 60344 | | |
| 2026-03-02 14:00 | 66588 | | |
| 2026-03-02 13:00 | 75700 | | |
| 2026-03-02 12:00 | 88013 | | |
| 2026-03-02 11:00 | 102963 | | |
| 2026-03-02 10:00 | 118444 | | |
| 2026-03-02 09:00 | 131006 | | |
| 2026-03-02 08:00 | 137875 | | |
| 2026-03-02 07:00 | 137269 | | |
| 2026-03-02 06:00 | 129369 | | |
| 2026-03-02 05:00 | 119862 | | |
| 2026-03-02 04:00 | 114569 | | |
| 2026-03-02 03:00 | 112875 | | |
| 2026-03-02 02:00 | 113906 | | |
| 2026-03-02 01:00 | 120463 | | |
| 2026-03-02 00:00 | 132450 | | |
| 2026-03-01 23:00 | 144194 | | |
| 2026-03-01 22:00 | 150025 | | |
| 2026-03-01 21:00 | 148562 | | |
| 2026-03-01 20:00 | 141719 | | |
| 2026-03-01 19:00 | 129938 | | |
| 2026-03-01 18:00 | 112119 | | |
| 2026-03-01 17:00 | 93088 | | |