COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-10-18 01:00 | 39819 | | |
| 2026-10-18 00:00 | 43200 | | |
| 2026-10-17 23:00 | 46294 | | |
| 2026-10-17 22:00 | 48725 | | |
| 2026-10-17 21:00 | 52044 | | |
| 2026-10-17 20:00 | 55919 | | |
| 2026-10-17 19:00 | 57619 | | |
| 2026-10-17 18:00 | 55188 | | |
| 2026-10-17 17:00 | 49038 | | |
| 2026-10-17 16:00 | 42281 | | |
| 2026-10-17 15:00 | 38044 | | |
| 2026-10-17 14:00 | 36438 | | |
| 2026-10-17 13:00 | 36456 | | |
| 2026-10-17 12:00 | 37244 | | |
| 2026-10-17 11:00 | 37656 | | |
| 2026-10-17 10:00 | 38356 | | |
| 2026-10-17 09:00 | 40325 | | |
| 2026-10-17 08:00 | 41263 | | |
| 2026-10-17 07:00 | 39619 | | |
| 2026-10-17 06:00 | 37669 | | |
| 2026-10-17 05:00 | 37056 | | |
| 2026-10-17 04:00 | 37600 | | |
| 2026-10-17 03:00 | 39244 | | |
| 2026-10-17 02:00 | 41494 | | |
| 2026-10-17 01:00 | 43794 | | |
| 2026-10-17 00:00 | 46150 | | |
| 2026-10-16 23:00 | 47812 | | |
| 2026-10-16 22:00 | 48056 | | |
| 2026-10-16 21:00 | 47681 | | |
| 2026-10-16 20:00 | 47938 | | |
| 2026-10-16 19:00 | 49581 | | |
| 2026-10-16 18:00 | 51188 | | |
| 2026-10-16 17:00 | 50094 | | |
| 2026-10-16 16:00 | 47163 | | |
| 2026-10-16 15:00 | 45388 | | |
| 2026-10-16 14:00 | 45587 | | |
| 2026-10-16 13:00 | 47475 | | |
| 2026-10-16 12:00 | 51950 | | |
| 2026-10-16 11:00 | 59125 | | |
| 2026-10-16 10:00 | 65088 | | |
| 2026-10-16 09:00 | 65231 | | |
| 2026-10-16 08:00 | 59381 | | |
| 2026-10-16 07:00 | 50894 | | |
| 2026-10-16 06:00 | 43600 | | |
| 2026-10-16 05:00 | 39331 | | |
| 2026-10-16 04:00 | 37569 | | |
| 2026-10-16 03:00 | 37888 | | |
| 2026-10-16 02:00 | 40081 | | |
| 2026-10-16 01:00 | 42962 | | |
| 2026-10-16 00:00 | 45175 | | |
| 2026-10-15 23:00 | 45100 | | |
| 2026-10-15 22:00 | 42506 | | |
| 2026-10-15 21:00 | 41119 | | |
| 2026-10-15 20:00 | 44688 | | |
| 2026-10-15 19:00 | 51013 | | |
| 2026-10-15 18:00 | 54413 | | |
| 2026-10-15 17:00 | 53631 | | |
| 2026-10-15 16:00 | 51650 | | |
| 2026-10-15 15:00 | 49806 | | |
| 2026-10-15 14:00 | 48119 | | |
| 2026-10-15 13:00 | 48300 | | |
| 2026-10-15 12:00 | 51513 | | |
| 2026-10-15 11:00 | 55869 | | |
| 2026-10-15 10:00 | 60069 | | |
| 2026-10-15 09:00 | 63962 | | |
| 2026-10-15 08:00 | 64325 | | |
| 2026-10-15 07:00 | 59731 | | |
| 2026-10-15 06:00 | 54650 | | |
| 2026-10-15 05:00 | 51862 | | |
| 2026-10-15 04:00 | 50562 | | |
| 2026-10-15 03:00 | 50994 | | |
| 2026-10-15 02:00 | 52788 | | |
| 2026-10-15 01:00 | 52712 | | |
| 2026-10-15 00:00 | 49406 | | |
| 2026-10-14 23:00 | 46212 | | |
| 2026-10-14 22:00 | 46319 | | |
| 2026-10-14 21:00 | 50337 | | |
| 2026-10-14 20:00 | 56681 | | |
| 2026-10-14 19:00 | 60481 | | |
| 2026-10-14 18:00 | 57688 | | |
| 2026-10-14 17:00 | 50531 | | |
| 2026-10-14 16:00 | 44669 | | |
| 2026-10-14 15:00 | 42844 | | |
| 2026-10-14 14:00 | 43138 | | |
| 2026-10-14 13:00 | 42575 | | |
| 2026-10-14 12:00 | 41719 | | |
| 2026-10-14 11:00 | 42969 | | |
| 2026-10-14 10:00 | 46269 | | |
| 2026-10-14 09:00 | 50050 | | |
| 2026-10-14 08:00 | 51862 | | |
| 2026-10-14 07:00 | 49938 | | |
| 2026-10-14 06:00 | 46469 | | |
| 2026-10-14 05:00 | 43881 | | |
| 2026-10-14 04:00 | 42119 | | |
| 2026-10-14 03:00 | 41538 | | |
| 2026-10-14 02:00 | 43056 | | |
| 2026-10-14 01:00 | 46006 | | |
| 2026-10-14 00:00 | 48606 | | |
| 2026-10-13 23:00 | 50825 | | |
| 2026-10-13 22:00 | 54556 | | |
| 2026-10-13 21:00 | 60550 | | |
| 2026-10-13 20:00 | 66744 | | |
| 2026-10-13 19:00 | 69369 | | |
| 2026-10-13 18:00 | 65331 | | |
| 2026-10-13 17:00 | 56362 | | |
| 2026-10-13 16:00 | 48788 | | |
| 2026-10-13 15:00 | 46331 | | |
| 2026-10-13 14:00 | 47712 | | |
| 2026-10-13 13:00 | 51231 | | |
| 2026-10-13 12:00 | 57462 | | |
| 2026-10-13 11:00 | 65981 | | |
| 2026-10-13 10:00 | 74700 | | |
| 2026-10-13 09:00 | 82506 | | |
| 2026-10-13 08:00 | 85556 | | |
| 2026-10-13 07:00 | 79706 | | |
| 2026-10-13 06:00 | 67650 | | |
| 2026-10-13 05:00 | 53938 | | |
| 2026-10-13 04:00 | 41869 | | |
| 2026-10-13 03:00 | 35669 | | |
| 2026-10-13 02:00 | 36362 | | |
| 2026-10-13 01:00 | 41369 | | |
| 2026-10-13 00:00 | 49119 | | |
| 2026-10-12 23:00 | 58438 | | |
| 2026-10-12 22:00 | 66806 | | |
| 2026-10-12 21:00 | 71787 | | |
| 2026-10-12 20:00 | 72150 | | |
| 2026-10-12 19:00 | 67050 | | |
| 2026-10-12 18:00 | 57194 | | |
| 2026-10-12 17:00 | 47450 | | |
| 2026-10-12 16:00 | 42644 | | |
| 2026-10-12 15:00 | 43163 | | |
| 2026-10-12 14:00 | 47906 | | |
| 2026-10-12 13:00 | 54837 | | |
| 2026-10-12 12:00 | 61106 | | |
| 2026-10-12 11:00 | 67756 | | |
| 2026-10-12 10:00 | 77431 | | |
| 2026-10-12 09:00 | 86862 | | |
| 2026-10-12 08:00 | 89237 | | |
| 2026-10-12 07:00 | 83213 | | |
| 2026-10-12 06:00 | 73737 | | |
| 2026-10-12 05:00 | 65219 | | |
| 2026-10-12 04:00 | 58587 | | |
| 2026-10-12 03:00 | 53594 | | |
| 2026-10-12 02:00 | 50556 | | |
| 2026-10-12 01:00 | 49487 | | |
| 2026-10-12 00:00 | 49756 | | |
| 2026-10-11 23:00 | 52031 | | |
| 2026-10-11 22:00 | 57756 | | |
| 2026-10-11 21:00 | 65213 | | |
| 2026-10-11 20:00 | 69888 | | |
| 2026-10-11 19:00 | 69000 | | |
| 2026-10-11 18:00 | 63044 | | |
| 2026-10-11 17:00 | 55688 | | |
| 2026-10-11 16:00 | 51312 | | |
| 2026-10-11 15:00 | 51388 | | |
| 2026-10-11 14:00 | 55531 | | |
| 2026-10-11 13:00 | 62169 | | |
| 2026-10-11 12:00 | 68575 | | |
| 2026-10-11 11:00 | 73769 | | |
| 2026-10-11 10:00 | 77481 | | |
| 2026-10-11 09:00 | 77900 | | |
| 2026-10-11 08:00 | 74138 | | |
| 2026-10-11 07:00 | 67725 | | |
| 2026-10-11 06:00 | 61638 | | |
| 2026-10-11 05:00 | 58075 | | |
| 2026-10-11 04:00 | 56288 | | |
| 2026-10-11 03:00 | 55231 | | |
| 2026-10-11 02:00 | 55663 | | |
| 2026-10-11 01:00 | 58038 | | |
| 2026-10-11 00:00 | 62237 | | |
| 2026-10-10 23:00 | 67112 | | |
| 2026-10-10 22:00 | 70919 | | |
| 2026-10-10 21:00 | 73987 | | |
| 2026-10-10 20:00 | 76000 | | |
| 2026-10-10 19:00 | 74244 | | |
| 2026-10-10 18:00 | 68050 | | |
| 2026-10-10 17:00 | 60006 | | |
| 2026-10-10 16:00 | 53906 | | |
| 2026-10-10 15:00 | 52369 | | |
| 2026-10-10 14:00 | 53944 | | |
| 2026-10-10 13:00 | 55106 | | |
| 2026-10-10 12:00 | 55644 | | |
| 2026-10-10 11:00 | 57281 | | |
| 2026-10-10 10:00 | 58450 | | |
| 2026-10-10 09:00 | 56150 | | |
| 2026-10-10 08:00 | 50825 | | |
| 2026-10-10 07:00 | 45612 | | |
| 2026-10-10 06:00 | 42375 | | |
| 2026-10-10 05:00 | 40650 | | |
| 2026-10-10 04:00 | 39675 | | |
| 2026-10-10 03:00 | 39544 | | |
| 2026-10-10 02:00 | 41263 | | |
| 2026-10-10 01:00 | 45750 | | |
| 2026-10-10 00:00 | 51606 | | |
| 2026-10-09 23:00 | 55944 | | |
| 2026-10-09 22:00 | 58275 | | |
| 2026-10-09 21:00 | 61150 | | |
| 2026-10-09 20:00 | 65881 | | |
| 2026-10-09 19:00 | 70044 | | |
| 2026-10-09 18:00 | 70500 | | |
| 2026-10-09 17:00 | 67056 | | |
| 2026-10-09 16:00 | 63000 | | |
| 2026-10-09 15:00 | 61737 | | |
| 2026-10-09 14:00 | 63269 | | |
| 2026-10-09 13:00 | 65844 | | |
| 2026-10-09 12:00 | 69025 | | |
| 2026-10-09 11:00 | 72656 | | |
| 2026-10-09 10:00 | 75013 | | |
| 2026-10-09 09:00 | 74019 | | |
| 2026-10-09 08:00 | 68812 | | |
| 2026-10-09 07:00 | 60438 | | |
| 2026-10-09 06:00 | 51369 | | |
| 2026-10-09 05:00 | 43700 | | |
| 2026-10-09 04:00 | 39031 | | |
| 2026-10-09 03:00 | 38250 | | |
| 2026-10-09 02:00 | 39944 | | |
| 2026-10-09 01:00 | 42219 | | |
| 2026-10-09 00:00 | 46081 | | |
| 2026-10-08 23:00 | 52725 | | |
| 2026-10-08 22:00 | 61019 | | |
| 2026-10-08 21:00 | 71525 | | |
| 2026-10-08 20:00 | 84694 | | |
| 2026-10-08 19:00 | 94463 | | |
| 2026-10-08 18:00 | 93188 | | |
| 2026-10-08 17:00 | 82394 | | |
| 2026-10-08 16:00 | 71100 | | |
| 2026-10-08 15:00 | 64287 | | |
| 2026-10-08 14:00 | 60769 | | |
| 2026-10-08 13:00 | 60256 | | |
| 2026-10-08 12:00 | 63975 | | |
| 2026-10-08 11:00 | 70450 | | |
| 2026-10-08 10:00 | 76650 | | |
| 2026-10-08 09:00 | 80500 | | |
| 2026-10-08 08:00 | 79156 | | |
| 2026-10-08 07:00 | 70669 | | |
| 2026-10-08 06:00 | 59237 | | |
| 2026-10-08 05:00 | 51250 | | |
| 2026-10-08 04:00 | 47694 | | |
| 2026-10-08 03:00 | 46831 | | |
| 2026-10-08 02:00 | 48194 | | |
| 2026-10-08 01:00 | 50481 | | |
| 2026-10-08 00:00 | 53112 | | |
| 2026-10-07 23:00 | 58850 | | |
| 2026-10-07 22:00 | 69081 | | |
| 2026-10-07 21:00 | 81138 | | |
| 2026-10-07 20:00 | 91575 | | |
| 2026-10-07 19:00 | 97412 | | |
| 2026-10-07 18:00 | 96419 | | |
| 2026-10-07 17:00 | 90194 | | |