COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 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 | | |
| 2026-04-12 16:00 | 117138 | | |
| 2026-04-12 15:00 | 119688 | | |
| 2026-04-12 14:00 | 124381 | | |
| 2026-04-12 13:00 | 130625 | | |
| 2026-04-12 12:00 | 136500 | | |
| 2026-04-12 11:00 | 140438 | | |
| 2026-04-12 10:00 | 142194 | | |
| 2026-04-12 09:00 | 142488 | | |
| 2026-04-12 08:00 | 141769 | | |
| 2026-04-12 07:00 | 137756 | | |
| 2026-04-12 06:00 | 128812 | | |
| 2026-04-12 05:00 | 119144 | | |
| 2026-04-12 04:00 | 114244 | | |
| 2026-04-12 03:00 | 115150 | | |
| 2026-04-12 02:00 | 119987 | | |
| 2026-04-12 01:00 | 127156 | | |
| 2026-04-12 00:00 | 135537 | | |
| 2026-04-11 23:00 | 142894 | | |
| 2026-04-11 22:00 | 148144 | | |
| 2026-04-11 21:00 | 151625 | | |
| 2026-04-11 20:00 | 148350 | | |
| 2026-04-11 19:00 | 132106 | | |
| 2026-04-11 18:00 | 108938 | | |
| 2026-04-11 17:00 | 91206 | | |
| 2026-04-11 16:00 | 82006 | | |
| 2026-04-11 15:00 | 78106 | | |
| 2026-04-11 14:00 | 77975 | | |
| 2026-04-11 13:00 | 80331 | | |
| 2026-04-11 12:00 | 82981 | | |
| 2026-04-11 11:00 | 85213 | | |
| 2026-04-11 10:00 | 88612 | | |
| 2026-04-11 09:00 | 94769 | | |
| 2026-04-11 08:00 | 103394 | | |
| 2026-04-11 07:00 | 113438 | | |
| 2026-04-11 06:00 | 122681 | | |
| 2026-04-11 05:00 | 127794 | | |
| 2026-04-11 04:00 | 129137 | | |
| 2026-04-11 03:00 | 130281 | | |
| 2026-04-11 02:00 | 132256 | | |
| 2026-04-11 01:00 | 133412 | | |
| 2026-04-11 00:00 | 132694 | | |
| 2026-04-10 23:00 | 130594 | | |
| 2026-04-10 22:00 | 129250 | | |
| 2026-04-10 21:00 | 130350 | | |
| 2026-04-10 20:00 | 129381 | | |
| 2026-04-10 19:00 | 118888 | | |
| 2026-04-10 18:00 | 100806 | | |
| 2026-04-10 17:00 | 84581 | | |
| 2026-04-10 16:00 | 74825 | | |
| 2026-04-10 15:00 | 70800 | | |
| 2026-04-10 14:00 | 72119 | | |
| 2026-04-10 13:00 | 79581 | | |
| 2026-04-10 12:00 | 91781 | | |
| 2026-04-10 11:00 | 104706 | | |
| 2026-04-10 10:00 | 117175 | | |
| 2026-04-10 09:00 | 129975 | | |
| 2026-04-10 08:00 | 140613 | | |
| 2026-04-10 07:00 | 144600 | | |
| 2026-04-10 06:00 | 139469 | | |
| 2026-04-10 05:00 | 128156 | | |
| 2026-04-10 04:00 | 117588 | | |
| 2026-04-10 03:00 | 111225 | | |
| 2026-04-10 02:00 | 107531 | | |
| 2026-04-10 01:00 | 105481 | | |
| 2026-04-10 00:00 | 106975 | | |
| 2026-04-09 23:00 | 113700 | | |
| 2026-04-09 22:00 | 124269 | | |
| 2026-04-09 21:00 | 134781 | | |
| 2026-04-09 20:00 | 136581 | | |
| 2026-04-09 19:00 | 120287 | | |
| 2026-04-09 18:00 | 91306 | | |
| 2026-04-09 17:00 | 67006 | | |
| 2026-04-09 16:00 | 55575 | | |
| 2026-04-09 15:00 | 52462 | | |
| 2026-04-09 14:00 | 52681 | | |
| 2026-04-09 13:00 | 56594 | | |
| 2026-04-09 12:00 | 66188 | | |
| 2026-04-09 11:00 | 79719 | | |
| 2026-04-09 10:00 | 93344 | | |
| 2026-04-09 09:00 | 106312 | | |
| 2026-04-09 08:00 | 117763 | | |
| 2026-04-09 07:00 | 123025 | | |
| 2026-04-09 06:00 | 119237 | | |
| 2026-04-09 05:00 | 108938 | | |
| 2026-04-09 04:00 | 98162 | | |
| 2026-04-09 03:00 | 91819 | | |
| 2026-04-09 02:00 | 90775 | | |
| 2026-04-09 01:00 | 95419 | | |
| 2026-04-09 00:00 | 105269 | | |
| 2026-04-08 23:00 | 116438 | | |
| 2026-04-08 22:00 | 125456 | | |
| 2026-04-08 21:00 | 130494 | | |
| 2026-04-08 20:00 | 127419 | | |
| 2026-04-08 19:00 | 110725 | | |
| 2026-04-08 18:00 | 83344 | | |
| 2026-04-08 17:00 | 59931 | | |
| 2026-04-08 16:00 | 51875 | | |
| 2026-04-08 15:00 | 56481 | | |
| 2026-04-08 14:00 | 65681 | | |
| 2026-04-08 13:00 | 75450 | | |
| 2026-04-08 12:00 | 85469 | | |
| 2026-04-08 11:00 | 96888 | | |
| 2026-04-08 10:00 | 110438 | | |
| 2026-04-08 09:00 | 123787 | | |
| 2026-04-08 08:00 | 131062 | | |
| 2026-04-08 07:00 | 127356 | | |
| 2026-04-08 06:00 | 115081 | | |
| 2026-04-08 05:00 | 102075 | | |
| 2026-04-08 04:00 | 93894 | | |
| 2026-04-08 03:00 | 92525 | | |
| 2026-04-08 02:00 | 98056 | | |
| 2026-04-08 01:00 | 108281 | | |
| 2026-04-08 00:00 | 118938 | | |
| 2026-04-07 23:00 | 126100 | | |
| 2026-04-07 22:00 | 129181 | | |
| 2026-04-07 21:00 | 127894 | | |
| 2026-04-07 20:00 | 117237 | | |
| 2026-04-07 19:00 | 93612 | | |
| 2026-04-07 18:00 | 65569 | | |
| 2026-04-07 17:00 | 46656 | | |
| 2026-04-07 16:00 | 39650 | | |
| 2026-04-07 15:00 | 39913 | | |
| 2026-04-07 14:00 | 44475 | | |
| 2026-04-07 13:00 | 50844 | | |
| 2026-04-07 12:00 | 57394 | | |
| 2026-04-07 11:00 | 65175 | | |
| 2026-04-07 10:00 | 75456 | | |
| 2026-04-07 09:00 | 87119 | | |
| 2026-04-07 08:00 | 97469 | | |
| 2026-04-07 07:00 | 104219 | | |
| 2026-04-07 06:00 | 103931 | | |
| 2026-04-07 05:00 | 95825 | | |
| 2026-04-07 04:00 | 87981 | | |
| 2026-04-07 03:00 | 87425 | | |
| 2026-04-07 02:00 | 92481 | | |
| 2026-04-07 01:00 | 102231 | | |
| 2026-04-07 00:00 | 117088 | | |
| 2026-04-06 23:00 | 130831 | | |
| 2026-04-06 22:00 | 137556 | | |
| 2026-04-06 21:00 | 138838 | | |
| 2026-04-06 20:00 | 133562 | | |
| 2026-04-06 19:00 | 114781 | | |
| 2026-04-06 18:00 | 86700 | | |
| 2026-04-06 17:00 | 65312 | | |
| 2026-04-06 16:00 | 56975 | | |
| 2026-04-06 15:00 | 56575 | | |
| 2026-04-06 14:00 | 59044 | | |
| 2026-04-06 13:00 | 62069 | | |
| 2026-04-06 12:00 | 67713 | | |
| 2026-04-06 11:00 | 80794 | | |
| 2026-04-06 10:00 | 102800 | | |
| 2026-04-06 09:00 | 127756 | | |
| 2026-04-06 08:00 | 144331 | | |
| 2026-04-06 07:00 | 146387 | | |
| 2026-04-06 06:00 | 137412 | | |
| 2026-04-06 05:00 | 123763 | | |
| 2026-04-06 04:00 | 111444 | | |
| 2026-04-06 03:00 | 104569 | | |
| 2026-04-06 02:00 | 102088 | | |
| 2026-04-06 01:00 | 100787 | | |
| 2026-04-06 00:00 | 102519 | | |
| 2026-04-05 23:00 | 112156 | | |
| 2026-04-05 22:00 | 127250 | | |
| 2026-04-05 21:00 | 138419 | | |
| 2026-04-05 20:00 | 138387 | | |
| 2026-04-05 19:00 | 125062 | | |
| 2026-04-05 18:00 | 102606 | | |
| 2026-04-05 17:00 | 80925 | | |
| 2026-04-05 16:00 | 67844 | | |
| 2026-04-05 15:00 | 64306 | | |
| 2026-04-05 14:00 | 67469 | | |
| 2026-04-05 13:00 | 73544 | | |
| 2026-04-05 12:00 | 80650 | | |
| 2026-04-05 11:00 | 90144 | | |
| 2026-04-05 10:00 | 102844 | | |
| 2026-04-05 09:00 | 115794 | | |
| 2026-04-05 08:00 | 122844 | | |
| 2026-04-05 07:00 | 120631 | | |
| 2026-04-05 06:00 | 114638 | | |
| 2026-04-05 05:00 | 111806 | | |
| 2026-04-05 04:00 | 110388 | | |
| 2026-04-05 03:00 | 107925 | | |
| 2026-04-05 02:00 | 109975 | | |
| 2026-04-05 01:00 | 119662 | | |
| 2026-04-05 00:00 | 131306 | | |
| 2026-04-04 23:00 | 139306 | | |
| 2026-04-04 22:00 | 142012 | | |
| 2026-04-04 21:00 | 138156 | | |
| 2026-04-04 20:00 | 125394 | | |
| 2026-04-04 19:00 | 102750 | | |
| 2026-04-04 18:00 | 76656 | | |
| 2026-04-04 17:00 | 58181 | | |
| 2026-04-04 16:00 | 50794 | | |
| 2026-04-04 15:00 | 50781 | | |
| 2026-04-04 14:00 | 55350 | | |
| 2026-04-04 13:00 | 62981 | | |
| 2026-04-04 12:00 | 72450 | | |
| 2026-04-04 11:00 | 83388 | | |
| 2026-04-04 10:00 | 96075 | | |
| 2026-04-04 09:00 | 111812 | | |
| 2026-04-04 08:00 | 129463 | | |
| 2026-04-04 07:00 | 142169 | | |
| 2026-04-04 06:00 | 146044 | | |
| 2026-04-04 05:00 | 144856 | | |
| 2026-04-04 04:00 | 141775 | | |
| 2026-04-04 03:00 | 138213 | | |
| 2026-04-04 02:00 | 136506 | | |
| 2026-04-04 01:00 | 137569 | | |
| 2026-04-04 00:00 | 140519 | | |
| 2026-04-03 23:00 | 142312 | | |
| 2026-04-03 22:00 | 140387 | | |
| 2026-04-03 21:00 | 137469 | | |
| 2026-04-03 20:00 | 134387 | | |
| 2026-04-03 19:00 | 124031 | | |
| 2026-04-03 18:00 | 104388 | | |
| 2026-04-03 17:00 | 85106 | | |