COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-04-29 13:00 | 124844 | | |
| 2026-04-29 12:00 | 128300 | | |
| 2026-04-29 11:00 | 134694 | | |
| 2026-04-29 10:00 | 145150 | | |
| 2026-04-29 09:00 | 156756 | | |
| 2026-04-29 08:00 | 166631 | | |
| 2026-04-29 07:00 | 171625 | | |
| 2026-04-29 06:00 | 169981 | | |
| 2026-04-29 05:00 | 165225 | | |
| 2026-04-29 04:00 | 161031 | | |
| 2026-04-29 03:00 | 157569 | | |
| 2026-04-29 02:00 | 155825 | | |
| 2026-04-29 01:00 | 156769 | | |
| 2026-04-29 00:00 | 158400 | | |
| 2026-04-28 23:00 | 159062 | | |
| 2026-04-28 22:00 | 159550 | | |
| 2026-04-28 21:00 | 159731 | | |
| 2026-04-28 20:00 | 155256 | | |
| 2026-04-28 19:00 | 141975 | | |
| 2026-04-28 18:00 | 123769 | | |
| 2026-04-28 17:00 | 109256 | | |
| 2026-04-28 16:00 | 102394 | | |
| 2026-04-28 15:00 | 101844 | | |
| 2026-04-28 14:00 | 105469 | | |
| 2026-04-28 13:00 | 110056 | | |
| 2026-04-28 12:00 | 111625 | | |
| 2026-04-28 11:00 | 110306 | | |
| 2026-04-28 10:00 | 110419 | | |
| 2026-04-28 09:00 | 116375 | | |
| 2026-04-28 08:00 | 128250 | | |
| 2026-04-28 07:00 | 139181 | | |
| 2026-04-28 06:00 | 142500 | | |
| 2026-04-28 05:00 | 139363 | | |
| 2026-04-28 04:00 | 134756 | | |
| 2026-04-28 03:00 | 131381 | | |
| 2026-04-28 02:00 | 128775 | | |
| 2026-04-28 01:00 | 125638 | | |
| 2026-04-28 00:00 | 124412 | | |
| 2026-04-27 23:00 | 129037 | | |
| 2026-04-27 22:00 | 137269 | | |
| 2026-04-27 21:00 | 143431 | | |
| 2026-04-27 20:00 | 141781 | | |
| 2026-04-27 19:00 | 126944 | | |
| 2026-04-27 18:00 | 104463 | | |
| 2026-04-27 17:00 | 88562 | | |
| 2026-04-27 16:00 | 84112 | | |
| 2026-04-27 15:00 | 86506 | | |
| 2026-04-27 14:00 | 91731 | | |
| 2026-04-27 13:00 | 97419 | | |
| 2026-04-27 12:00 | 101831 | | |
| 2026-04-27 11:00 | 104312 | | |
| 2026-04-27 10:00 | 107756 | | |
| 2026-04-27 09:00 | 116994 | | |
| 2026-04-27 08:00 | 127763 | | |
| 2026-04-27 07:00 | 129806 | | |
| 2026-04-27 06:00 | 123125 | | |
| 2026-04-27 05:00 | 115388 | | |
| 2026-04-27 04:00 | 110625 | | |
| 2026-04-27 03:00 | 107838 | | |
| 2026-04-27 02:00 | 105388 | | |
| 2026-04-27 01:00 | 104881 | | |
| 2026-04-27 00:00 | 109325 | | |
| 2026-04-26 23:00 | 119631 | | |
| 2026-04-26 22:00 | 132912 | | |
| 2026-04-26 21:00 | 142631 | | |
| 2026-04-26 20:00 | 142006 | | |
| 2026-04-26 19:00 | 129219 | | |
| 2026-04-26 18:00 | 110763 | | |
| 2026-04-26 17:00 | 96331 | | |
| 2026-04-26 16:00 | 89456 | | |
| 2026-04-26 15:00 | 88013 | | |
| 2026-04-26 14:00 | 89312 | | |
| 2026-04-26 13:00 | 91112 | | |
| 2026-04-26 12:00 | 93294 | | |
| 2026-04-26 11:00 | 97806 | | |
| 2026-04-26 10:00 | 106081 | | |
| 2026-04-26 09:00 | 117263 | | |
| 2026-04-26 08:00 | 126375 | | |
| 2026-04-26 07:00 | 128613 | | |
| 2026-04-26 06:00 | 126656 | | |
| 2026-04-26 05:00 | 125544 | | |
| 2026-04-26 04:00 | 124831 | | |
| 2026-04-26 03:00 | 123156 | | |
| 2026-04-26 02:00 | 123825 | | |
| 2026-04-26 01:00 | 132450 | | |
| 2026-04-26 00:00 | 148519 | | |
| 2026-04-25 23:00 | 162169 | | |
| 2026-04-25 22:00 | 166319 | | |
| 2026-04-25 21:00 | 164500 | | |
| 2026-04-25 20:00 | 159825 | | |
| 2026-04-25 19:00 | 146863 | | |
| 2026-04-25 18:00 | 122506 | | |
| 2026-04-25 17:00 | 94469 | | |
| 2026-04-25 16:00 | 72881 | | |
| 2026-04-25 15:00 | 62119 | | |
| 2026-04-25 14:00 | 60281 | | |
| 2026-04-25 13:00 | 63700 | | |
| 2026-04-25 12:00 | 72050 | | |
| 2026-04-25 11:00 | 86131 | | |
| 2026-04-25 10:00 | 105331 | | |
| 2026-04-25 09:00 | 128306 | | |
| 2026-04-25 08:00 | 149512 | | |
| 2026-04-25 07:00 | 161756 | | |
| 2026-04-25 06:00 | 165850 | | |
| 2026-04-25 05:00 | 166806 | | |
| 2026-04-25 04:00 | 164856 | | |
| 2026-04-25 03:00 | 159381 | | |
| 2026-04-25 02:00 | 153894 | | |
| 2026-04-25 01:00 | 152231 | | |
| 2026-04-25 00:00 | 154387 | | |
| 2026-04-24 23:00 | 157831 | | |
| 2026-04-24 22:00 | 160963 | | |
| 2026-04-24 21:00 | 163144 | | |
| 2026-04-24 20:00 | 158150 | | |
| 2026-04-24 19:00 | 136006 | | |
| 2026-04-24 18:00 | 101644 | | |
| 2026-04-24 17:00 | 72987 | | |
| 2026-04-24 16:00 | 57344 | | |
| 2026-04-24 15:00 | 50450 | | |
| 2026-04-24 14:00 | 49750 | | |
| 2026-04-24 13:00 | 56575 | | |
| 2026-04-24 12:00 | 70562 | | |
| 2026-04-24 11:00 | 88469 | | |
| 2026-04-24 10:00 | 109219 | | |
| 2026-04-24 09:00 | 132125 | | |
| 2026-04-24 08:00 | 151456 | | |
| 2026-04-24 07:00 | 161887 | | |
| 2026-04-24 06:00 | 165319 | | |
| 2026-04-24 05:00 | 166381 | | |
| 2026-04-24 04:00 | 166750 | | |
| 2026-04-24 03:00 | 165631 | | |
| 2026-04-24 02:00 | 162463 | | |
| 2026-04-24 01:00 | 158838 | | |
| 2026-04-24 00:00 | 157494 | | |
| 2026-04-23 23:00 | 158769 | | |
| 2026-04-23 22:00 | 159387 | | |
| 2026-04-23 21:00 | 156312 | | |
| 2026-04-23 20:00 | 146831 | | |
| 2026-04-23 19:00 | 125838 | | |
| 2026-04-23 18:00 | 96594 | | |
| 2026-04-23 17:00 | 74588 | | |
| 2026-04-23 16:00 | 67562 | | |
| 2026-04-23 15:00 | 69406 | | |
| 2026-04-23 14:00 | 73506 | | |
| 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 | | |