COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-06-27 02:00 | 111519 | | |
| 2026-06-27 01:00 | 123931 | | |
| 2026-06-27 00:00 | 136231 | | |
| 2026-06-26 23:00 | 142825 | | |
| 2026-06-26 22:00 | 142806 | | |
| 2026-06-26 21:00 | 142600 | | |
| 2026-06-26 20:00 | 143444 | | |
| 2026-06-26 19:00 | 139250 | | |
| 2026-06-26 18:00 | 128594 | | |
| 2026-06-26 17:00 | 119394 | | |
| 2026-06-26 16:00 | 117819 | | |
| 2026-06-26 15:00 | 120319 | | |
| 2026-06-26 14:00 | 121975 | | |
| 2026-06-26 13:00 | 122737 | | |
| 2026-06-26 12:00 | 123888 | | |
| 2026-06-26 11:00 | 126050 | | |
| 2026-06-26 10:00 | 129425 | | |
| 2026-06-26 09:00 | 133781 | | |
| 2026-06-26 08:00 | 139463 | | |
| 2026-06-26 07:00 | 145469 | | |
| 2026-06-26 06:00 | 148419 | | |
| 2026-06-26 05:00 | 148281 | | |
| 2026-06-26 04:00 | 148794 | | |
| 2026-06-26 03:00 | 151850 | | |
| 2026-06-26 02:00 | 156531 | | |
| 2026-06-26 01:00 | 160356 | | |
| 2026-06-26 00:00 | 161219 | | |
| 2026-06-25 23:00 | 159031 | | |
| 2026-06-25 22:00 | 155488 | | |
| 2026-06-25 21:00 | 154463 | | |
| 2026-06-25 20:00 | 158000 | | |
| 2026-06-25 19:00 | 161025 | | |
| 2026-06-25 18:00 | 159200 | | |
| 2026-06-25 17:00 | 155194 | | |
| 2026-06-25 16:00 | 151369 | | |
| 2026-06-25 15:00 | 149081 | | |
| 2026-06-25 14:00 | 148775 | | |
| 2026-06-25 13:00 | 145456 | | |
| 2026-06-25 12:00 | 137381 | | |
| 2026-06-25 11:00 | 130688 | | |
| 2026-06-25 10:00 | 128625 | | |
| 2026-06-25 09:00 | 128894 | | |
| 2026-06-25 08:00 | 130150 | | |
| 2026-06-25 07:00 | 132256 | | |
| 2026-06-25 06:00 | 132806 | | |
| 2026-06-25 05:00 | 130275 | | |
| 2026-06-25 04:00 | 128306 | | |
| 2026-06-25 03:00 | 130662 | | |
| 2026-06-25 02:00 | 135606 | | |
| 2026-06-25 01:00 | 139494 | | |
| 2026-06-25 00:00 | 142219 | | |
| 2026-06-24 23:00 | 146188 | | |
| 2026-06-24 22:00 | 152906 | | |
| 2026-06-24 21:00 | 162075 | | |
| 2026-06-24 20:00 | 171463 | | |
| 2026-06-24 19:00 | 177644 | | |
| 2026-06-24 18:00 | 178294 | | |
| 2026-06-24 17:00 | 173769 | | |
| 2026-06-24 16:00 | 165519 | | |
| 2026-06-24 15:00 | 155019 | | |
| 2026-06-24 14:00 | 144231 | | |
| 2026-06-24 13:00 | 133831 | | |
| 2026-06-24 12:00 | 123469 | | |
| 2026-06-24 11:00 | 113281 | | |
| 2026-06-24 10:00 | 103150 | | |
| 2026-06-24 09:00 | 94594 | | |
| 2026-06-24 08:00 | 90731 | | |
| 2026-06-24 07:00 | 90088 | | |
| 2026-06-24 06:00 | 88388 | | |
| 2026-06-24 05:00 | 86963 | | |
| 2026-06-24 04:00 | 90013 | | |
| 2026-06-24 03:00 | 98444 | | |
| 2026-06-24 02:00 | 110181 | | |
| 2026-06-24 01:00 | 121869 | | |
| 2026-06-24 00:00 | 133169 | | |
| 2026-06-23 23:00 | 145812 | | |
| 2026-06-23 22:00 | 156312 | | |
| 2026-06-23 21:00 | 160113 | | |
| 2026-06-23 20:00 | 158769 | | |
| 2026-06-23 19:00 | 155744 | | |
| 2026-06-23 18:00 | 152088 | | |
| 2026-06-23 17:00 | 148200 | | |
| 2026-06-23 16:00 | 145312 | | |
| 2026-06-23 15:00 | 142588 | | |
| 2026-06-23 14:00 | 136556 | | |
| 2026-06-23 13:00 | 126969 | | |
| 2026-06-23 12:00 | 116756 | | |
| 2026-06-23 11:00 | 106906 | | |
| 2026-06-23 10:00 | 98612 | | |
| 2026-06-23 09:00 | 95119 | | |
| 2026-06-23 08:00 | 97369 | | |
| 2026-06-23 07:00 | 102112 | | |
| 2026-06-23 06:00 | 104562 | | |
| 2026-06-23 05:00 | 103444 | | |
| 2026-06-23 04:00 | 102688 | | |
| 2026-06-23 03:00 | 105862 | | |
| 2026-06-23 02:00 | 112369 | | |
| 2026-06-23 01:00 | 119869 | | |
| 2026-06-23 00:00 | 128275 | | |
| 2026-06-22 23:00 | 138925 | | |
| 2026-06-22 22:00 | 150188 | | |
| 2026-06-22 21:00 | 159044 | | |
| 2026-06-22 20:00 | 163169 | | |
| 2026-06-22 19:00 | 160075 | | |
| 2026-06-22 18:00 | 151456 | | |
| 2026-06-22 17:00 | 143650 | | |
| 2026-06-22 16:00 | 139556 | | |
| 2026-06-22 15:00 | 136706 | | |
| 2026-06-22 14:00 | 132756 | | |
| 2026-06-22 13:00 | 127000 | | |
| 2026-06-22 12:00 | 119000 | | |
| 2026-06-22 11:00 | 109856 | | |
| 2026-06-22 10:00 | 101900 | | |
| 2026-06-22 09:00 | 96438 | | |
| 2026-06-22 08:00 | 94362 | | |
| 2026-06-22 07:00 | 95831 | | |
| 2026-06-22 06:00 | 97487 | | |
| 2026-06-22 05:00 | 96275 | | |
| 2026-06-22 04:00 | 95156 | | |
| 2026-06-22 03:00 | 98394 | | |
| 2026-06-22 02:00 | 105206 | | |
| 2026-06-22 01:00 | 111775 | | |
| 2026-06-22 00:00 | 117200 | | |
| 2026-06-21 23:00 | 123838 | | |
| 2026-06-21 22:00 | 130925 | | |
| 2026-06-21 21:00 | 134781 | | |
| 2026-06-21 20:00 | 134875 | | |
| 2026-06-21 19:00 | 132162 | | |
| 2026-06-21 18:00 | 124494 | | |
| 2026-06-21 17:00 | 110581 | | |
| 2026-06-21 16:00 | 95325 | | |
| 2026-06-21 15:00 | 85338 | | |
| 2026-06-21 14:00 | 81425 | | |
| 2026-06-21 13:00 | 79438 | | |
| 2026-06-21 12:00 | 76894 | | |
| 2026-06-21 11:00 | 74612 | | |
| 2026-06-21 10:00 | 72725 | | |
| 2026-06-21 09:00 | 70463 | | |
| 2026-06-21 08:00 | 69469 | | |
| 2026-06-21 07:00 | 72281 | | |
| 2026-06-21 06:00 | 77831 | | |
| 2026-06-21 05:00 | 82331 | | |
| 2026-06-21 04:00 | 84575 | | |
| 2026-06-21 03:00 | 87963 | | |
| 2026-06-21 02:00 | 95144 | | |
| 2026-06-21 01:00 | 103150 | | |
| 2026-06-21 00:00 | 108475 | | |
| 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 | | |