COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-04-23 13:00 | 77769 | | |
| 2026-04-23 12:00 | 82656 | | |
| 2026-04-23 11:00 | 89831 | | |
| 2026-04-23 10:00 | 101688 | | |
| 2026-04-23 09:00 | 118631 | | |
| 2026-04-23 08:00 | 136062 | | |
| 2026-04-23 07:00 | 148450 | | |
| 2026-04-23 06:00 | 152556 | | |
| 2026-04-23 05:00 | 147331 | | |
| 2026-04-23 04:00 | 138069 | | |
| 2026-04-23 03:00 | 132850 | | |
| 2026-04-23 02:00 | 130956 | | |
| 2026-04-23 01:00 | 126050 | | |
| 2026-04-23 00:00 | 119769 | | |
| 2026-04-22 23:00 | 119088 | | |
| 2026-04-22 22:00 | 123831 | | |
| 2026-04-22 21:00 | 127906 | | |
| 2026-04-22 20:00 | 125356 | | |
| 2026-04-22 19:00 | 112450 | | |
| 2026-04-22 18:00 | 94219 | | |
| 2026-04-22 17:00 | 82550 | | |
| 2026-04-22 16:00 | 81800 | | |
| 2026-04-22 15:00 | 87612 | | |
| 2026-04-22 14:00 | 95362 | | |
| 2026-04-22 13:00 | 101244 | | |
| 2026-04-22 12:00 | 104456 | | |
| 2026-04-22 11:00 | 107912 | | |
| 2026-04-22 10:00 | 113950 | | |
| 2026-04-22 09:00 | 122881 | | |
| 2026-04-22 08:00 | 132238 | | |
| 2026-04-22 07:00 | 137650 | | |
| 2026-04-22 06:00 | 134969 | | |
| 2026-04-22 05:00 | 123994 | | |
| 2026-04-22 04:00 | 112256 | | |
| 2026-04-22 03:00 | 107481 | | |
| 2026-04-22 02:00 | 110425 | | |
| 2026-04-22 01:00 | 118463 | | |
| 2026-04-22 00:00 | 126556 | | |
| 2026-04-21 23:00 | 129812 | | |
| 2026-04-21 22:00 | 130031 | | |
| 2026-04-21 21:00 | 130175 | | |
| 2026-04-21 20:00 | 126881 | | |
| 2026-04-21 19:00 | 116506 | | |
| 2026-04-21 18:00 | 102013 | | |
| 2026-04-21 17:00 | 89731 | | |
| 2026-04-21 16:00 | 83331 | | |
| 2026-04-21 15:00 | 83888 | | |
| 2026-04-21 14:00 | 90037 | | |
| 2026-04-21 13:00 | 97162 | | |
| 2026-04-21 12:00 | 101694 | | |
| 2026-04-21 11:00 | 103112 | | |
| 2026-04-21 10:00 | 103375 | | |
| 2026-04-21 09:00 | 106775 | | |
| 2026-04-21 08:00 | 114306 | | |
| 2026-04-21 07:00 | 120306 | | |
| 2026-04-21 06:00 | 119325 | | |
| 2026-04-21 05:00 | 113287 | | |
| 2026-04-21 04:00 | 108756 | | |
| 2026-04-21 03:00 | 109362 | | |
| 2026-04-21 02:00 | 114106 | | |
| 2026-04-21 01:00 | 120850 | | |
| 2026-04-21 00:00 | 130469 | | |
| 2026-04-20 23:00 | 144719 | | |
| 2026-04-20 22:00 | 159606 | | |
| 2026-04-20 21:00 | 168050 | | |
| 2026-04-20 20:00 | 167106 | | |
| 2026-04-20 19:00 | 157713 | | |
| 2026-04-20 18:00 | 142106 | | |
| 2026-04-20 17:00 | 125406 | | |
| 2026-04-20 16:00 | 113331 | | |
| 2026-04-20 15:00 | 106388 | | |
| 2026-04-20 14:00 | 102169 | | |
| 2026-04-20 13:00 | 100250 | | |
| 2026-04-20 12:00 | 102644 | | |
| 2026-04-20 11:00 | 111362 | | |
| 2026-04-20 10:00 | 124456 | | |
| 2026-04-20 09:00 | 137188 | | |
| 2026-04-20 08:00 | 146244 | | |
| 2026-04-20 07:00 | 150019 | | |
| 2026-04-20 06:00 | 147231 | | |
| 2026-04-20 05:00 | 138475 | | |
| 2026-04-20 04:00 | 129356 | | |
| 2026-04-20 03:00 | 125537 | | |
| 2026-04-20 02:00 | 127425 | | |
| 2026-04-20 01:00 | 135344 | | |
| 2026-04-20 00:00 | 149225 | | |
| 2026-04-19 23:00 | 163363 | | |
| 2026-04-19 22:00 | 171931 | | |
| 2026-04-19 21:00 | 175094 | | |
| 2026-04-19 20:00 | 173412 | | |
| 2026-04-19 19:00 | 164106 | | |
| 2026-04-19 18:00 | 149619 | | |
| 2026-04-19 17:00 | 137137 | | |
| 2026-04-19 16:00 | 128344 | | |
| 2026-04-19 15:00 | 122638 | | |
| 2026-04-19 14:00 | 121513 | | |
| 2026-04-19 13:00 | 124862 | | |
| 2026-04-19 12:00 | 129631 | | |
| 2026-04-19 11:00 | 131081 | | |
| 2026-04-19 10:00 | 128631 | | |
| 2026-04-19 09:00 | 128956 | | |
| 2026-04-19 08:00 | 135669 | | |
| 2026-04-19 07:00 | 141156 | | |
| 2026-04-19 06:00 | 137919 | | |
| 2026-04-19 05:00 | 130438 | | |
| 2026-04-19 04:00 | 126475 | | |
| 2026-04-19 03:00 | 126581 | | |
| 2026-04-19 02:00 | 126194 | | |
| 2026-04-19 01:00 | 121581 | | |
| 2026-04-19 00:00 | 114244 | | |
| 2026-04-18 23:00 | 107406 | | |
| 2026-04-18 22:00 | 101369 | | |
| 2026-04-18 21:00 | 96213 | | |
| 2026-04-18 20:00 | 90269 | | |
| 2026-04-18 19:00 | 79081 | | |
| 2026-04-18 18:00 | 64219 | | |
| 2026-04-18 17:00 | 53375 | | |
| 2026-04-18 16:00 | 49031 | | |
| 2026-04-18 15:00 | 48069 | | |
| 2026-04-18 14:00 | 49212 | | |
| 2026-04-18 13:00 | 52913 | | |
| 2026-04-18 12:00 | 59475 | | |
| 2026-04-18 11:00 | 69319 | | |
| 2026-04-18 10:00 | 82213 | | |
| 2026-04-18 09:00 | 99000 | | |
| 2026-04-18 08:00 | 120231 | | |
| 2026-04-18 07:00 | 139475 | | |
| 2026-04-18 06:00 | 147425 | | |
| 2026-04-18 05:00 | 144050 | | |
| 2026-04-18 04:00 | 138456 | | |
| 2026-04-18 03:00 | 138025 | | |
| 2026-04-18 02:00 | 142281 | | |
| 2026-04-18 01:00 | 147456 | | |
| 2026-04-18 00:00 | 152312 | | |
| 2026-04-17 23:00 | 156375 | | |
| 2026-04-17 22:00 | 158781 | | |
| 2026-04-17 21:00 | 158794 | | |
| 2026-04-17 20:00 | 152381 | | |
| 2026-04-17 19:00 | 134581 | | |
| 2026-04-17 18:00 | 108950 | | |
| 2026-04-17 17:00 | 86844 | | |
| 2026-04-17 16:00 | 75150 | | |
| 2026-04-17 15:00 | 72188 | | |
| 2026-04-17 14:00 | 74213 | | |
| 2026-04-17 13:00 | 78994 | | |
| 2026-04-17 12:00 | 85500 | | |
| 2026-04-17 11:00 | 94956 | | |
| 2026-04-17 10:00 | 109125 | | |
| 2026-04-17 09:00 | 124906 | | |
| 2026-04-17 08:00 | 136075 | | |
| 2026-04-17 07:00 | 140238 | | |
| 2026-04-17 06:00 | 139206 | | |
| 2026-04-17 05:00 | 134975 | | |
| 2026-04-17 04:00 | 129106 | | |
| 2026-04-17 03:00 | 124231 | | |
| 2026-04-17 02:00 | 121969 | | |
| 2026-04-17 01:00 | 121556 | | |
| 2026-04-17 00:00 | 122006 | | |
| 2026-04-16 23:00 | 121588 | | |
| 2026-04-16 22:00 | 119938 | | |
| 2026-04-16 21:00 | 117463 | | |
| 2026-04-16 20:00 | 108894 | | |
| 2026-04-16 19:00 | 91737 | | |
| 2026-04-16 18:00 | 73175 | | |
| 2026-04-16 17:00 | 59825 | | |
| 2026-04-16 16:00 | 53844 | | |
| 2026-04-16 15:00 | 54606 | | |
| 2026-04-16 14:00 | 59306 | | |
| 2026-04-16 13:00 | 66994 | | |
| 2026-04-16 12:00 | 78737 | | |
| 2026-04-16 11:00 | 94869 | | |
| 2026-04-16 10:00 | 114263 | | |
| 2026-04-16 09:00 | 131031 | | |
| 2026-04-16 08:00 | 137381 | | |
| 2026-04-16 07:00 | 133588 | | |
| 2026-04-16 06:00 | 125331 | | |
| 2026-04-16 05:00 | 116775 | | |
| 2026-04-16 04:00 | 111375 | | |
| 2026-04-16 03:00 | 110644 | | |
| 2026-04-16 02:00 | 114425 | | |
| 2026-04-16 01:00 | 123037 | | |
| 2026-04-16 00:00 | 133050 | | |
| 2026-04-15 23:00 | 137950 | | |
| 2026-04-15 22:00 | 138188 | | |
| 2026-04-15 21:00 | 138081 | | |
| 2026-04-15 20:00 | 132669 | | |
| 2026-04-15 19:00 | 114569 | | |
| 2026-04-15 18:00 | 90169 | | |
| 2026-04-15 17:00 | 73650 | | |
| 2026-04-15 16:00 | 69781 | | |
| 2026-04-15 15:00 | 71350 | | |
| 2026-04-15 14:00 | 70713 | | |
| 2026-04-15 13:00 | 70125 | | |
| 2026-04-15 12:00 | 75737 | | |
| 2026-04-15 11:00 | 86162 | | |
| 2026-04-15 10:00 | 97025 | | |
| 2026-04-15 09:00 | 108588 | | |
| 2026-04-15 08:00 | 120775 | | |
| 2026-04-15 07:00 | 128463 | | |
| 2026-04-15 06:00 | 127812 | | |
| 2026-04-15 05:00 | 122175 | | |
| 2026-04-15 04:00 | 117519 | | |
| 2026-04-15 03:00 | 116088 | | |
| 2026-04-15 02:00 | 117037 | | |
| 2026-04-15 01:00 | 121612 | | |
| 2026-04-15 00:00 | 131144 | | |
| 2026-04-14 23:00 | 140706 | | |
| 2026-04-14 22:00 | 146044 | | |
| 2026-04-14 21:00 | 148387 | | |
| 2026-04-14 20:00 | 144600 | | |
| 2026-04-14 19:00 | 128494 | | |
| 2026-04-14 18:00 | 104388 | | |
| 2026-04-14 17:00 | 84944 | | |
| 2026-04-14 16:00 | 76019 | | |
| 2026-04-14 15:00 | 73775 | | |
| 2026-04-14 14:00 | 73800 | | |
| 2026-04-14 13:00 | 76250 | | |
| 2026-04-14 12:00 | 83237 | | |
| 2026-04-14 11:00 | 94806 | | |
| 2026-04-14 10:00 | 108944 | | |
| 2026-04-14 09:00 | 121331 | | |
| 2026-04-14 08:00 | 127231 | | |
| 2026-04-14 07:00 | 127412 | | |
| 2026-04-14 06:00 | 123806 | | |
| 2026-04-14 05:00 | 115194 | | |
| 2026-04-14 04:00 | 104656 | | |
| 2026-04-14 03:00 | 98056 | | |
| 2026-04-14 02:00 | 96975 | | |
| 2026-04-14 01:00 | 100638 | | |
| 2026-04-14 00:00 | 107469 | | |
| 2026-04-13 23:00 | 115900 | | |
| 2026-04-13 22:00 | 125362 | | |
| 2026-04-13 21:00 | 132463 | | |
| 2026-04-13 20:00 | 130894 | | |
| 2026-04-13 19:00 | 118737 | | |
| 2026-04-13 18:00 | 102912 | | |
| 2026-04-13 17:00 | 92100 | | |
| 2026-04-13 16:00 | 86787 | | |
| 2026-04-13 15:00 | 83456 | | |
| 2026-04-13 14:00 | 82619 | | |
| 2026-04-13 13:00 | 85112 | | |
| 2026-04-13 12:00 | 88912 | | |
| 2026-04-13 11:00 | 92537 | | |
| 2026-04-13 10:00 | 96894 | | |
| 2026-04-13 09:00 | 104544 | | |
| 2026-04-13 08:00 | 115456 | | |
| 2026-04-13 07:00 | 123625 | | |
| 2026-04-13 06:00 | 123000 | | |
| 2026-04-13 05:00 | 115619 | | |
| 2026-04-13 04:00 | 108938 | | |
| 2026-04-13 03:00 | 106906 | | |
| 2026-04-13 02:00 | 107800 | | |
| 2026-04-13 01:00 | 108938 | | |
| 2026-04-13 00:00 | 112300 | | |
| 2026-04-12 23:00 | 122487 | | |
| 2026-04-12 22:00 | 137144 | | |
| 2026-04-12 21:00 | 147600 | | |
| 2026-04-12 20:00 | 148431 | | |
| 2026-04-12 19:00 | 139781 | | |
| 2026-04-12 18:00 | 127031 | | |
| 2026-04-12 17:00 | 118544 | | |