COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-08-08 07:00 | 39156 | | |
| 2026-08-08 06:00 | 37281 | | |
| 2026-08-08 05:00 | 38612 | | |
| 2026-08-08 04:00 | 41731 | | |
| 2026-08-08 03:00 | 48081 | | |
| 2026-08-08 02:00 | 58194 | | |
| 2026-08-08 01:00 | 71100 | | |
| 2026-08-08 00:00 | 86787 | | |
| 2026-08-07 23:00 | 106500 | | |
| 2026-08-07 22:00 | 128750 | | |
| 2026-08-07 21:00 | 147944 | | |
| 2026-08-07 20:00 | 159319 | | |
| 2026-08-07 19:00 | 161675 | | |
| 2026-08-07 18:00 | 157594 | | |
| 2026-08-07 17:00 | 152113 | | |
| 2026-08-07 16:00 | 147350 | | |
| 2026-08-07 15:00 | 140925 | | |
| 2026-08-07 14:00 | 130137 | | |
| 2026-08-07 13:00 | 115213 | | |
| 2026-08-07 12:00 | 99194 | | |
| 2026-08-07 11:00 | 85500 | | |
| 2026-08-07 10:00 | 75062 | | |
| 2026-08-07 09:00 | 66287 | | |
| 2026-08-07 08:00 | 58575 | | |
| 2026-08-07 07:00 | 53237 | | |
| 2026-08-07 06:00 | 50331 | | |
| 2026-08-07 05:00 | 47938 | | |
| 2026-08-07 04:00 | 45169 | | |
| 2026-08-07 03:00 | 44112 | | |
| 2026-08-07 02:00 | 47894 | | |
| 2026-08-07 01:00 | 57487 | | |
| 2026-08-07 00:00 | 71469 | | |
| 2026-08-06 23:00 | 88713 | | |
| 2026-08-06 22:00 | 109350 | | |
| 2026-08-06 21:00 | 131062 | | |
| 2026-08-06 20:00 | 147806 | | |
| 2026-08-06 19:00 | 155075 | | |
| 2026-08-06 18:00 | 153762 | | |
| 2026-08-06 17:00 | 147725 | | |
| 2026-08-06 16:00 | 139181 | | |
| 2026-08-06 15:00 | 128700 | | |
| 2026-08-06 14:00 | 117475 | | |
| 2026-08-06 13:00 | 106725 | | |
| 2026-08-06 12:00 | 97225 | | |
| 2026-08-06 11:00 | 89019 | | |
| 2026-08-06 10:00 | 80669 | | |
| 2026-08-06 09:00 | 71106 | | |
| 2026-08-06 08:00 | 61906 | | |
| 2026-08-06 07:00 | 55381 | | |
| 2026-08-06 06:00 | 51131 | | |
| 2026-08-06 05:00 | 47594 | | |
| 2026-08-06 04:00 | 45663 | | |
| 2026-08-06 03:00 | 48050 | | |
| 2026-08-06 02:00 | 56600 | | |
| 2026-08-06 01:00 | 70300 | | |
| 2026-08-06 00:00 | 85612 | | |
| 2026-08-05 23:00 | 100700 | | |
| 2026-08-05 22:00 | 116831 | | |
| 2026-08-05 21:00 | 133444 | | |
| 2026-08-05 20:00 | 146194 | | |
| 2026-08-05 19:00 | 151544 | | |
| 2026-08-05 18:00 | 149938 | | |
| 2026-08-05 17:00 | 144394 | | |
| 2026-08-05 16:00 | 135988 | | |
| 2026-08-05 15:00 | 121162 | | |
| 2026-08-05 14:00 | 100169 | | |
| 2026-08-05 13:00 | 81700 | | |
| 2026-08-05 12:00 | 70781 | | |
| 2026-08-05 11:00 | 64850 | | |
| 2026-08-05 10:00 | 61794 | | |
| 2026-08-05 09:00 | 60456 | | |
| 2026-08-05 08:00 | 59069 | | |
| 2026-08-05 07:00 | 57337 | | |
| 2026-08-05 06:00 | 55750 | | |
| 2026-08-05 05:00 | 54413 | | |
| 2026-08-05 04:00 | 54263 | | |
| 2026-08-05 03:00 | 56938 | | |
| 2026-08-05 02:00 | 63150 | | |
| 2026-08-05 01:00 | 71850 | | |
| 2026-08-05 00:00 | 81862 | | |
| 2026-08-04 23:00 | 93925 | | |
| 2026-08-04 22:00 | 109456 | | |
| 2026-08-04 21:00 | 127194 | | |
| 2026-08-04 20:00 | 141662 | | |
| 2026-08-04 19:00 | 149019 | | |
| 2026-08-04 18:00 | 151363 | | |
| 2026-08-04 17:00 | 150475 | | |
| 2026-08-04 16:00 | 143706 | | |
| 2026-08-04 15:00 | 127581 | | |
| 2026-08-04 14:00 | 104881 | | |
| 2026-08-04 13:00 | 84144 | | |
| 2026-08-04 12:00 | 70244 | | |
| 2026-08-04 11:00 | 63931 | | |
| 2026-08-04 10:00 | 64331 | | |
| 2026-08-04 09:00 | 66525 | | |
| 2026-08-04 08:00 | 64750 | | |
| 2026-08-04 07:00 | 59181 | | |
| 2026-08-04 06:00 | 54831 | | |
| 2026-08-04 05:00 | 53806 | | |
| 2026-08-04 04:00 | 54619 | | |
| 2026-08-04 03:00 | 56856 | | |
| 2026-08-04 02:00 | 61462 | | |
| 2026-08-04 01:00 | 69256 | | |
| 2026-08-04 00:00 | 80750 | | |
| 2026-08-03 23:00 | 95731 | | |
| 2026-08-03 22:00 | 112206 | | |
| 2026-08-03 21:00 | 127319 | | |
| 2026-08-03 20:00 | 138000 | | |
| 2026-08-03 19:00 | 142400 | | |
| 2026-08-03 18:00 | 142025 | | |
| 2026-08-03 17:00 | 136556 | | |
| 2026-08-03 16:00 | 123294 | | |
| 2026-08-03 15:00 | 104894 | | |
| 2026-08-03 14:00 | 88213 | | |
| 2026-08-03 13:00 | 76794 | | |
| 2026-08-03 12:00 | 69338 | | |
| 2026-08-03 11:00 | 64844 | | |
| 2026-08-03 10:00 | 63763 | | |
| 2026-08-03 09:00 | 64487 | | |
| 2026-08-03 08:00 | 65463 | | |
| 2026-08-03 07:00 | 67287 | | |
| 2026-08-03 06:00 | 68838 | | |
| 2026-08-03 05:00 | 67831 | | |
| 2026-08-03 04:00 | 65662 | | |
| 2026-08-03 03:00 | 65369 | | |
| 2026-08-03 02:00 | 67531 | | |
| 2026-08-03 01:00 | 71838 | | |
| 2026-08-03 00:00 | 78756 | | |
| 2026-08-02 23:00 | 88100 | | |
| 2026-08-02 22:00 | 99237 | | |
| 2026-08-02 21:00 | 110537 | | |
| 2026-08-02 20:00 | 116425 | | |
| 2026-08-02 19:00 | 112956 | | |
| 2026-08-02 18:00 | 105094 | | |
| 2026-08-02 17:00 | 99225 | | |
| 2026-08-02 16:00 | 95088 | | |
| 2026-08-02 15:00 | 90287 | | |
| 2026-08-02 14:00 | 85237 | | |
| 2026-08-02 13:00 | 81412 | | |
| 2026-08-02 12:00 | 78881 | | |
| 2026-08-02 11:00 | 76612 | | |
| 2026-08-02 10:00 | 72213 | | |
| 2026-08-02 09:00 | 63788 | | |
| 2026-08-02 08:00 | 54763 | | |
| 2026-08-02 07:00 | 50181 | | |
| 2026-08-02 06:00 | 49425 | | |
| 2026-08-02 05:00 | 49812 | | |
| 2026-08-02 04:00 | 51794 | | |
| 2026-08-02 03:00 | 56256 | | |
| 2026-08-02 02:00 | 62056 | | |
| 2026-08-02 01:00 | 67950 | | |
| 2026-08-02 00:00 | 74694 | | |
| 2026-08-01 23:00 | 83681 | | |
| 2026-08-01 22:00 | 94644 | | |
| 2026-08-01 21:00 | 105544 | | |
| 2026-08-01 20:00 | 113119 | | |
| 2026-08-01 19:00 | 115456 | | |
| 2026-08-01 18:00 | 114325 | | |
| 2026-08-01 17:00 | 111150 | | |
| 2026-08-01 16:00 | 104694 | | |
| 2026-08-01 15:00 | 96662 | | |
| 2026-08-01 14:00 | 91431 | | |
| 2026-08-01 13:00 | 88169 | | |
| 2026-08-01 12:00 | 82644 | | |
| 2026-08-01 11:00 | 75463 | | |
| 2026-08-01 10:00 | 70106 | | |
| 2026-08-01 09:00 | 67162 | | |
| 2026-08-01 08:00 | 66244 | | |
| 2026-08-01 07:00 | 67575 | | |
| 2026-08-01 06:00 | 68769 | | |
| 2026-08-01 05:00 | 66081 | | |
| 2026-08-01 04:00 | 61519 | | |
| 2026-08-01 03:00 | 61788 | | |
| 2026-08-01 02:00 | 68619 | | |
| 2026-08-01 01:00 | 78644 | | |
| 2026-08-01 00:00 | 91625 | | |
| 2026-07-31 23:00 | 111838 | | |
| 2026-07-31 22:00 | 140019 | | |
| 2026-07-31 21:00 | 167400 | | |
| 2026-07-31 20:00 | 182781 | | |
| 2026-07-31 19:00 | 182419 | | |
| 2026-07-31 18:00 | 171200 | | |
| 2026-07-31 17:00 | 159700 | | |
| 2026-07-31 16:00 | 154781 | | |
| 2026-07-31 15:00 | 151225 | | |
| 2026-07-31 14:00 | 141994 | | |
| 2026-07-31 13:00 | 129312 | | |
| 2026-07-31 12:00 | 118356 | | |
| 2026-07-31 11:00 | 109506 | | |
| 2026-07-31 10:00 | 100713 | | |
| 2026-07-31 09:00 | 92219 | | |
| 2026-07-31 08:00 | 84831 | | |
| 2026-07-31 07:00 | 78287 | | |
| 2026-07-31 06:00 | 73550 | | |
| 2026-07-31 05:00 | 71425 | | |
| 2026-07-31 04:00 | 73088 | | |
| 2026-07-31 03:00 | 80263 | | |
| 2026-07-31 02:00 | 88644 | | |
| 2026-07-31 01:00 | 91919 | | |
| 2026-07-31 00:00 | 92456 | | |
| 2026-07-30 23:00 | 97688 | | |
| 2026-07-30 22:00 | 110194 | | |
| 2026-07-30 21:00 | 124537 | | |
| 2026-07-30 20:00 | 132931 | | |
| 2026-07-30 19:00 | 133850 | | |
| 2026-07-30 18:00 | 131950 | | |
| 2026-07-30 17:00 | 131025 | | |
| 2026-07-30 16:00 | 130012 | | |
| 2026-07-30 15:00 | 126381 | | |
| 2026-07-30 14:00 | 120356 | | |
| 2026-07-30 13:00 | 111787 | | |
| 2026-07-30 12:00 | 99825 | | |
| 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 | | |