COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-07-30 11:00 | 87369 | | |
| 2026-07-30 10:00 | 77706 | | |
| 2026-07-30 09:00 | 70737 | | |
| 2026-07-30 08:00 | 64594 | | |
| 2026-07-30 07:00 | 57500 | | |
| 2026-07-30 06:00 | 51131 | | |
| 2026-07-30 05:00 | 48856 | | |
| 2026-07-30 04:00 | 50337 | | |
| 2026-07-30 03:00 | 54331 | | |
| 2026-07-30 02:00 | 61075 | | |
| 2026-07-30 01:00 | 69794 | | |
| 2026-07-30 00:00 | 80900 | | |
| 2026-07-29 23:00 | 96275 | | |
| 2026-07-29 22:00 | 115125 | | |
| 2026-07-29 21:00 | 134262 | | |
| 2026-07-29 20:00 | 149438 | | |
| 2026-07-29 19:00 | 156287 | | |
| 2026-07-29 18:00 | 153294 | | |
| 2026-07-29 17:00 | 143731 | | |
| 2026-07-29 16:00 | 132369 | | |
| 2026-07-29 15:00 | 120069 | | |
| 2026-07-29 14:00 | 106750 | | |
| 2026-07-29 13:00 | 95525 | | |
| 2026-07-29 12:00 | 88031 | | |
| 2026-07-29 11:00 | 81819 | | |
| 2026-07-29 10:00 | 75381 | | |
| 2026-07-29 09:00 | 70994 | | |
| 2026-07-29 08:00 | 69138 | | |
| 2026-07-29 07:00 | 65069 | | |
| 2026-07-29 06:00 | 56850 | | |
| 2026-07-29 05:00 | 49212 | | |
| 2026-07-29 04:00 | 46081 | | |
| 2026-07-29 03:00 | 47962 | | |
| 2026-07-29 02:00 | 54600 | | |
| 2026-07-29 01:00 | 64806 | | |
| 2026-07-29 00:00 | 76125 | | |
| 2026-07-28 23:00 | 86794 | | |
| 2026-07-28 22:00 | 98625 | | |
| 2026-07-28 21:00 | 114162 | | |
| 2026-07-28 20:00 | 128800 | | |
| 2026-07-28 19:00 | 134081 | | |
| 2026-07-28 18:00 | 130363 | | |
| 2026-07-28 17:00 | 125350 | | |
| 2026-07-28 16:00 | 122562 | | |
| 2026-07-28 15:00 | 119244 | | |
| 2026-07-28 14:00 | 112194 | | |
| 2026-07-28 13:00 | 103056 | | |
| 2026-07-28 12:00 | 95737 | | |
| 2026-07-28 11:00 | 90612 | | |
| 2026-07-28 10:00 | 86744 | | |
| 2026-07-28 09:00 | 84338 | | |
| 2026-07-28 08:00 | 81650 | | |
| 2026-07-28 07:00 | 76494 | | |
| 2026-07-28 06:00 | 70700 | | |
| 2026-07-28 05:00 | 67100 | | |
| 2026-07-28 04:00 | 66031 | | |
| 2026-07-28 03:00 | 68169 | | |
| 2026-07-28 02:00 | 74506 | | |
| 2026-07-28 01:00 | 84006 | | |
| 2026-07-28 00:00 | 96069 | | |
| 2026-07-27 23:00 | 111394 | | |
| 2026-07-27 22:00 | 128137 | | |
| 2026-07-27 21:00 | 141650 | | |
| 2026-07-27 20:00 | 148825 | | |
| 2026-07-27 19:00 | 149662 | | |
| 2026-07-27 18:00 | 145256 | | |
| 2026-07-27 17:00 | 137400 | | |
| 2026-07-27 16:00 | 128719 | | |
| 2026-07-27 15:00 | 120181 | | |
| 2026-07-27 14:00 | 110481 | | |
| 2026-07-27 13:00 | 99812 | | |
| 2026-07-27 12:00 | 90688 | | |
| 2026-07-27 11:00 | 84294 | | |
| 2026-07-27 10:00 | 79812 | | |
| 2026-07-27 09:00 | 76000 | | |
| 2026-07-27 08:00 | 71094 | | |
| 2026-07-27 07:00 | 63812 | | |
| 2026-07-27 06:00 | 55788 | | |
| 2026-07-27 05:00 | 50694 | | |
| 2026-07-27 04:00 | 50800 | | |
| 2026-07-27 03:00 | 55688 | | |
| 2026-07-27 02:00 | 63569 | | |
| 2026-07-27 01:00 | 73344 | | |
| 2026-07-27 00:00 | 84931 | | |
| 2026-07-26 23:00 | 97981 | | |
| 2026-07-26 22:00 | 112062 | | |
| 2026-07-26 21:00 | 126681 | | |
| 2026-07-26 20:00 | 138350 | | |
| 2026-07-26 19:00 | 140556 | | |
| 2026-07-26 18:00 | 132900 | | |
| 2026-07-26 17:00 | 123306 | | |
| 2026-07-26 16:00 | 115156 | | |
| 2026-07-26 15:00 | 106037 | | |
| 2026-07-26 14:00 | 96919 | | |
| 2026-07-26 13:00 | 89831 | | |
| 2026-07-26 12:00 | 84331 | | |
| 2026-07-26 11:00 | 79925 | | |
| 2026-07-26 10:00 | 75819 | | |
| 2026-07-26 09:00 | 69500 | | |
| 2026-07-26 08:00 | 60694 | | |
| 2026-07-26 07:00 | 53644 | | |
| 2026-07-26 06:00 | 51069 | | |
| 2026-07-26 05:00 | 51519 | | |
| 2026-07-26 04:00 | 53356 | | |
| 2026-07-26 03:00 | 56331 | | |
| 2026-07-26 02:00 | 60612 | | |
| 2026-07-26 01:00 | 66569 | | |
| 2026-07-26 00:00 | 74831 | | |
| 2026-07-25 23:00 | 85256 | | |
| 2026-07-25 22:00 | 95950 | | |
| 2026-07-25 21:00 | 105044 | | |
| 2026-07-25 20:00 | 113400 | | |
| 2026-07-25 19:00 | 121188 | | |
| 2026-07-25 18:00 | 124031 | | |
| 2026-07-25 17:00 | 119444 | | |
| 2026-07-25 16:00 | 111581 | | |
| 2026-07-25 15:00 | 105256 | | |
| 2026-07-25 14:00 | 100719 | | |
| 2026-07-25 13:00 | 95650 | | |
| 2026-07-25 12:00 | 89144 | | |
| 2026-07-25 11:00 | 81900 | | |
| 2026-07-25 10:00 | 74938 | | |
| 2026-07-25 09:00 | 69644 | | |
| 2026-07-25 08:00 | 66306 | | |
| 2026-07-25 07:00 | 63681 | | |
| 2026-07-25 06:00 | 61181 | | |
| 2026-07-25 05:00 | 59931 | | |
| 2026-07-25 04:00 | 61719 | | |
| 2026-07-25 03:00 | 67487 | | |
| 2026-07-25 02:00 | 76888 | | |
| 2026-07-25 01:00 | 88669 | | |
| 2026-07-25 00:00 | 102638 | | |
| 2026-07-24 23:00 | 119231 | | |
| 2026-07-24 22:00 | 136719 | | |
| 2026-07-24 21:00 | 151963 | | |
| 2026-07-24 20:00 | 161325 | | |
| 2026-07-24 19:00 | 162850 | | |
| 2026-07-24 18:00 | 160000 | | |
| 2026-07-24 17:00 | 157081 | | |
| 2026-07-24 16:00 | 152012 | | |
| 2026-07-24 15:00 | 140994 | | |
| 2026-07-24 14:00 | 127419 | | |
| 2026-07-24 13:00 | 117731 | | |
| 2026-07-24 12:00 | 111869 | | |
| 2026-07-24 11:00 | 106406 | | |
| 2026-07-24 10:00 | 101931 | | |
| 2026-07-24 09:00 | 99400 | | |
| 2026-07-24 08:00 | 95644 | | |
| 2026-07-24 07:00 | 87869 | | |
| 2026-07-24 06:00 | 77669 | | |
| 2026-07-24 05:00 | 68719 | | |
| 2026-07-24 04:00 | 63394 | | |
| 2026-07-24 03:00 | 62194 | | |
| 2026-07-24 02:00 | 64537 | | |
| 2026-07-24 01:00 | 69556 | | |
| 2026-07-24 00:00 | 77375 | | |
| 2026-07-23 23:00 | 88956 | | |
| 2026-07-23 22:00 | 103694 | | |
| 2026-07-23 21:00 | 118650 | | |
| 2026-07-23 20:00 | 130656 | | |
| 2026-07-23 19:00 | 137306 | | |
| 2026-07-23 18:00 | 136831 | | |
| 2026-07-23 17:00 | 131181 | | |
| 2026-07-23 16:00 | 126475 | | |
| 2026-07-23 15:00 | 125394 | | |
| 2026-07-23 14:00 | 123100 | | |
| 2026-07-23 13:00 | 114256 | | |
| 2026-07-23 12:00 | 100769 | | |
| 2026-07-23 11:00 | 89056 | | |
| 2026-07-23 10:00 | 83000 | | |
| 2026-07-23 09:00 | 81562 | | |
| 2026-07-23 08:00 | 79737 | | |
| 2026-07-23 07:00 | 73919 | | |
| 2026-07-23 06:00 | 66513 | | |
| 2026-07-23 05:00 | 61531 | | |
| 2026-07-23 04:00 | 59494 | | |
| 2026-07-23 03:00 | 60006 | | |
| 2026-07-23 02:00 | 64594 | | |
| 2026-07-23 01:00 | 73675 | | |
| 2026-07-23 00:00 | 85119 | | |
| 2026-07-22 23:00 | 96838 | | |
| 2026-07-22 22:00 | 107469 | | |
| 2026-07-22 21:00 | 118094 | | |
| 2026-07-22 20:00 | 130669 | | |
| 2026-07-22 19:00 | 141900 | | |
| 2026-07-22 18:00 | 147369 | | |
| 2026-07-22 17:00 | 147631 | | |
| 2026-07-22 16:00 | 145550 | | |
| 2026-07-22 15:00 | 142775 | | |
| 2026-07-22 14:00 | 138463 | | |
| 2026-07-22 13:00 | 131250 | | |
| 2026-07-22 12:00 | 120700 | | |
| 2026-07-22 11:00 | 107269 | | |
| 2026-07-22 10:00 | 93794 | | |
| 2026-07-22 09:00 | 83394 | | |
| 2026-07-22 08:00 | 76156 | | |
| 2026-07-22 07:00 | 70950 | | |
| 2026-07-22 06:00 | 66925 | | |
| 2026-07-22 05:00 | 63487 | | |
| 2026-07-22 04:00 | 62675 | | |
| 2026-07-22 03:00 | 67831 | | |
| 2026-07-22 02:00 | 78225 | | |
| 2026-07-22 01:00 | 89731 | | |
| 2026-07-22 00:00 | 101713 | | |
| 2026-07-21 23:00 | 116594 | | |
| 2026-07-21 22:00 | 132644 | | |
| 2026-07-21 21:00 | 145675 | | |
| 2026-07-21 20:00 | 153963 | | |
| 2026-07-21 19:00 | 157775 | | |
| 2026-07-21 18:00 | 157537 | | |
| 2026-07-21 17:00 | 152700 | | |
| 2026-07-21 16:00 | 144244 | | |
| 2026-07-21 15:00 | 134431 | | |
| 2026-07-21 14:00 | 123244 | | |
| 2026-07-21 13:00 | 109869 | | |
| 2026-07-21 12:00 | 95550 | | |
| 2026-07-21 11:00 | 83037 | | |
| 2026-07-21 10:00 | 73769 | | |
| 2026-07-21 09:00 | 67225 | | |
| 2026-07-21 08:00 | 62731 | | |
| 2026-07-21 07:00 | 59894 | | |
| 2026-07-21 06:00 | 58119 | | |
| 2026-07-21 05:00 | 56987 | | |
| 2026-07-21 04:00 | 56800 | | |
| 2026-07-21 03:00 | 57775 | | |
| 2026-07-21 02:00 | 60206 | | |
| 2026-07-21 01:00 | 65294 | | |
| 2026-07-21 00:00 | 74350 | | |
| 2026-07-20 23:00 | 87994 | | |
| 2026-07-20 22:00 | 104019 | | |
| 2026-07-20 21:00 | 116719 | | |
| 2026-07-20 20:00 | 121494 | | |
| 2026-07-20 19:00 | 119237 | | |
| 2026-07-20 18:00 | 116600 | | |
| 2026-07-20 17:00 | 118987 | | |
| 2026-07-20 16:00 | 122069 | | |
| 2026-07-20 15:00 | 118056 | | |
| 2026-07-20 14:00 | 107750 | | |
| 2026-07-20 13:00 | 96881 | | |
| 2026-07-20 12:00 | 87294 | | |
| 2026-07-20 11:00 | 79325 | | |
| 2026-07-20 10:00 | 74812 | | |
| 2026-07-20 09:00 | 72950 | | |
| 2026-07-20 08:00 | 70031 | | |
| 2026-07-20 07:00 | 64963 | | |
| 2026-07-20 06:00 | 59606 | | |
| 2026-07-20 05:00 | 55775 | | |
| 2026-07-20 04:00 | 54931 | | |
| 2026-07-20 03:00 | 58081 | | |
| 2026-07-20 02:00 | 65263 | | |
| 2026-07-20 01:00 | 74888 | | |
| 2026-07-20 00:00 | 85531 | | |
| 2026-07-19 23:00 | 97875 | | |
| 2026-07-19 22:00 | 111287 | | |
| 2026-07-19 21:00 | 123200 | | |
| 2026-07-19 20:00 | 131300 | | |
| 2026-07-19 19:00 | 133081 | | |
| 2026-07-19 18:00 | 129106 | | |
| 2026-07-19 17:00 | 123444 | | |