COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-07-05 23:00 | 128600 | | |
| 2026-07-05 22:00 | 135500 | | |
| 2026-07-05 21:00 | 138731 | | |
| 2026-07-05 20:00 | 140431 | | |
| 2026-07-05 19:00 | 138894 | | |
| 2026-07-05 18:00 | 131931 | | |
| 2026-07-05 17:00 | 121444 | | |
| 2026-07-05 16:00 | 112662 | | |
| 2026-07-05 15:00 | 108388 | | |
| 2026-07-05 14:00 | 107075 | | |
| 2026-07-05 13:00 | 106756 | | |
| 2026-07-05 12:00 | 106475 | | |
| 2026-07-05 11:00 | 105031 | | |
| 2026-07-05 10:00 | 102206 | | |
| 2026-07-05 09:00 | 99594 | | |
| 2026-07-05 08:00 | 98513 | | |
| 2026-07-05 07:00 | 98569 | | |
| 2026-07-05 06:00 | 98812 | | |
| 2026-07-05 05:00 | 99456 | | |
| 2026-07-05 04:00 | 101600 | | |
| 2026-07-05 03:00 | 105550 | | |
| 2026-07-05 02:00 | 110312 | | |
| 2026-07-05 01:00 | 115400 | | |
| 2026-07-05 00:00 | 120912 | | |
| 2026-07-04 23:00 | 125131 | | |
| 2026-07-04 22:00 | 126944 | | |
| 2026-07-04 21:00 | 128312 | | |
| 2026-07-04 20:00 | 129769 | | |
| 2026-07-04 19:00 | 129812 | | |
| 2026-07-04 18:00 | 129094 | | |
| 2026-07-04 17:00 | 128300 | | |
| 2026-07-04 16:00 | 126162 | | |
| 2026-07-04 15:00 | 123700 | | |
| 2026-07-04 14:00 | 123838 | | |
| 2026-07-04 13:00 | 125969 | | |
| 2026-07-04 12:00 | 126763 | | |
| 2026-07-04 11:00 | 124644 | | |
| 2026-07-04 10:00 | 120100 | | |
| 2026-07-04 09:00 | 114106 | | |
| 2026-07-04 08:00 | 108575 | | |
| 2026-07-04 07:00 | 105769 | | |
| 2026-07-04 06:00 | 105606 | | |
| 2026-07-04 05:00 | 106150 | | |
| 2026-07-04 04:00 | 106388 | | |
| 2026-07-04 03:00 | 106175 | | |
| 2026-07-04 02:00 | 106850 | | |
| 2026-07-04 01:00 | 113100 | | |
| 2026-07-04 00:00 | 125975 | | |
| 2026-07-03 23:00 | 138269 | | |
| 2026-07-03 22:00 | 144806 | | |
| 2026-07-03 21:00 | 146688 | | |
| 2026-07-03 20:00 | 146213 | | |
| 2026-07-03 19:00 | 145200 | | |
| 2026-07-03 18:00 | 143537 | | |
| 2026-07-03 17:00 | 140406 | | |
| 2026-07-03 16:00 | 137438 | | |
| 2026-07-03 15:00 | 137869 | | |
| 2026-07-03 14:00 | 142450 | | |
| 2026-07-03 13:00 | 148069 | | |
| 2026-07-03 12:00 | 152762 | | |
| 2026-07-03 11:00 | 155606 | | |
| 2026-07-03 10:00 | 152544 | | |
| 2026-07-03 09:00 | 142206 | | |
| 2026-07-03 08:00 | 129200 | | |
| 2026-07-03 07:00 | 117662 | | |
| 2026-07-03 06:00 | 109162 | | |
| 2026-07-03 05:00 | 102513 | | |
| 2026-07-03 04:00 | 95281 | | |
| 2026-07-03 03:00 | 90162 | | |
| 2026-07-03 02:00 | 92594 | | |
| 2026-07-03 01:00 | 103050 | | |
| 2026-07-03 00:00 | 117381 | | |
| 2026-07-02 23:00 | 131056 | | |
| 2026-07-02 22:00 | 141581 | | |
| 2026-07-02 21:00 | 147194 | | |
| 2026-07-02 20:00 | 146225 | | |
| 2026-07-02 19:00 | 140800 | | |
| 2026-07-02 18:00 | 136006 | | |
| 2026-07-02 17:00 | 134044 | | |
| 2026-07-02 16:00 | 134062 | | |
| 2026-07-02 15:00 | 135581 | | |
| 2026-07-02 14:00 | 136650 | | |
| 2026-07-02 13:00 | 133656 | | |
| 2026-07-02 12:00 | 127675 | | |
| 2026-07-02 11:00 | 123444 | | |
| 2026-07-02 10:00 | 122456 | | |
| 2026-07-02 09:00 | 123850 | | |
| 2026-07-02 08:00 | 126519 | | |
| 2026-07-02 07:00 | 127950 | | |
| 2026-07-02 06:00 | 125912 | | |
| 2026-07-02 05:00 | 121869 | | |
| 2026-07-02 04:00 | 119925 | | |
| 2026-07-02 03:00 | 121638 | | |
| 2026-07-02 02:00 | 125094 | | |
| 2026-07-02 01:00 | 128750 | | |
| 2026-07-02 00:00 | 133506 | | |
| 2026-07-01 23:00 | 139488 | | |
| 2026-07-01 22:00 | 143412 | | |
| 2026-07-01 21:00 | 142287 | | |
| 2026-07-01 20:00 | 137175 | | |
| 2026-07-01 19:00 | 132875 | | |
| 2026-07-01 18:00 | 132838 | | |
| 2026-07-01 17:00 | 135494 | | |
| 2026-07-01 16:00 | 138338 | | |
| 2026-07-01 15:00 | 140869 | | |
| 2026-07-01 14:00 | 141950 | | |
| 2026-07-01 13:00 | 138925 | | |
| 2026-07-01 12:00 | 131956 | | |
| 2026-07-01 11:00 | 126250 | | |
| 2026-07-01 10:00 | 125481 | | |
| 2026-07-01 09:00 | 126931 | | |
| 2026-07-01 08:00 | 127856 | | |
| 2026-07-01 07:00 | 128969 | | |
| 2026-07-01 06:00 | 130006 | | |
| 2026-07-01 05:00 | 131331 | | |
| 2026-07-01 04:00 | 135088 | | |
| 2026-07-01 03:00 | 140831 | | |
| 2026-07-01 02:00 | 145856 | | |
| 2026-07-01 01:00 | 147600 | | |
| 2026-07-01 00:00 | 146662 | | |
| 2026-06-30 23:00 | 147575 | | |
| 2026-06-30 22:00 | 152144 | | |
| 2026-06-30 21:00 | 157175 | | |
| 2026-06-30 20:00 | 160419 | | |
| 2026-06-30 19:00 | 159125 | | |
| 2026-06-30 18:00 | 149144 | | |
| 2026-06-30 17:00 | 137162 | | |
| 2026-06-30 16:00 | 134156 | | |
| 2026-06-30 15:00 | 136312 | | |
| 2026-06-30 14:00 | 135525 | | |
| 2026-06-30 13:00 | 133050 | | |
| 2026-06-30 12:00 | 132275 | | |
| 2026-06-30 11:00 | 131969 | | |
| 2026-06-30 10:00 | 128744 | | |
| 2026-06-30 09:00 | 123906 | | |
| 2026-06-30 08:00 | 122300 | | |
| 2026-06-30 07:00 | 123325 | | |
| 2026-06-30 06:00 | 121763 | | |
| 2026-06-30 05:00 | 117812 | | |
| 2026-06-30 04:00 | 117737 | | |
| 2026-06-30 03:00 | 123675 | | |
| 2026-06-30 02:00 | 130025 | | |
| 2026-06-30 01:00 | 130800 | | |
| 2026-06-30 00:00 | 128669 | | |
| 2026-06-29 23:00 | 131200 | | |
| 2026-06-29 22:00 | 137994 | | |
| 2026-06-29 21:00 | 142537 | | |
| 2026-06-29 20:00 | 141688 | | |
| 2026-06-29 19:00 | 136069 | | |
| 2026-06-29 18:00 | 128169 | | |
| 2026-06-29 17:00 | 121075 | | |
| 2026-06-29 16:00 | 116312 | | |
| 2026-06-29 15:00 | 114263 | | |
| 2026-06-29 14:00 | 114925 | | |
| 2026-06-29 13:00 | 115919 | | |
| 2026-06-29 12:00 | 114362 | | |
| 2026-06-29 11:00 | 111450 | | |
| 2026-06-29 10:00 | 110312 | | |
| 2026-06-29 09:00 | 113406 | | |
| 2026-06-29 08:00 | 120381 | | |
| 2026-06-29 07:00 | 123787 | | |
| 2026-06-29 06:00 | 117737 | | |
| 2026-06-29 05:00 | 108138 | | |
| 2026-06-29 04:00 | 103594 | | |
| 2026-06-29 03:00 | 105000 | | |
| 2026-06-29 02:00 | 110312 | | |
| 2026-06-29 01:00 | 120569 | | |
| 2026-06-29 00:00 | 134781 | | |
| 2026-06-28 23:00 | 147113 | | |
| 2026-06-28 22:00 | 153025 | | |
| 2026-06-28 21:00 | 151931 | | |
| 2026-06-28 20:00 | 144244 | | |
| 2026-06-28 19:00 | 131331 | | |
| 2026-06-28 18:00 | 117362 | | |
| 2026-06-28 17:00 | 105044 | | |
| 2026-06-28 16:00 | 94931 | | |
| 2026-06-28 15:00 | 90112 | | |
| 2026-06-28 14:00 | 91750 | | |
| 2026-06-28 13:00 | 95525 | | |
| 2026-06-28 12:00 | 97594 | | |
| 2026-06-28 11:00 | 97481 | | |
| 2026-06-28 10:00 | 95237 | | |
| 2026-06-28 09:00 | 91075 | | |
| 2026-06-28 08:00 | 87400 | | |
| 2026-06-28 07:00 | 86812 | | |
| 2026-06-28 06:00 | 88213 | | |
| 2026-06-28 05:00 | 88794 | | |
| 2026-06-28 04:00 | 88506 | | |
| 2026-06-28 03:00 | 88919 | | |
| 2026-06-28 02:00 | 90325 | | |
| 2026-06-28 01:00 | 92287 | | |
| 2026-06-28 00:00 | 95731 | | |
| 2026-06-27 23:00 | 101731 | | |
| 2026-06-27 22:00 | 108869 | | |
| 2026-06-27 21:00 | 114825 | | |
| 2026-06-27 20:00 | 117138 | | |
| 2026-06-27 19:00 | 112975 | | |
| 2026-06-27 18:00 | 102731 | | |
| 2026-06-27 17:00 | 91237 | | |
| 2026-06-27 16:00 | 83306 | | |
| 2026-06-27 15:00 | 80525 | | |
| 2026-06-27 14:00 | 82425 | | |
| 2026-06-27 13:00 | 87219 | | |
| 2026-06-27 12:00 | 90763 | | |
| 2026-06-27 11:00 | 88169 | | |
| 2026-06-27 10:00 | 79094 | | |
| 2026-06-27 09:00 | 69200 | | |
| 2026-06-27 08:00 | 64412 | | |
| 2026-06-27 07:00 | 65475 | | |
| 2026-06-27 06:00 | 69344 | | |
| 2026-06-27 05:00 | 75556 | | |
| 2026-06-27 04:00 | 86156 | | |
| 2026-06-27 03:00 | 99263 | | |
| 2026-06-27 02:00 | 111519 | | |
| 2026-06-27 01:00 | 123931 | | |
| 2026-06-27 00:00 | 136231 | | |
| 2026-06-26 23:00 | 142825 | | |
| 2026-06-26 22:00 | 142806 | | |
| 2026-06-26 21:00 | 142600 | | |
| 2026-06-26 20:00 | 143444 | | |
| 2026-06-26 19:00 | 139250 | | |
| 2026-06-26 18:00 | 128594 | | |
| 2026-06-26 17:00 | 119394 | | |
| 2026-06-26 16:00 | 117819 | | |
| 2026-06-26 15:00 | 120319 | | |
| 2026-06-26 14:00 | 121975 | | |
| 2026-06-26 13:00 | 122737 | | |
| 2026-06-26 12:00 | 123888 | | |
| 2026-06-26 11:00 | 126050 | | |
| 2026-06-26 10:00 | 129425 | | |
| 2026-06-26 09:00 | 133781 | | |
| 2026-06-26 08:00 | 139463 | | |
| 2026-06-26 07:00 | 145469 | | |
| 2026-06-26 06:00 | 148419 | | |
| 2026-06-26 05:00 | 148281 | | |
| 2026-06-26 04:00 | 148794 | | |
| 2026-06-26 03:00 | 151850 | | |
| 2026-06-26 02:00 | 156531 | | |
| 2026-06-26 01:00 | 160356 | | |
| 2026-06-26 00:00 | 161219 | | |
| 2026-06-25 23:00 | 159031 | | |
| 2026-06-25 22:00 | 155488 | | |
| 2026-06-25 21:00 | 154463 | | |
| 2026-06-25 20:00 | 158000 | | |
| 2026-06-25 19:00 | 161025 | | |
| 2026-06-25 18:00 | 159200 | | |
| 2026-06-25 17:00 | 155194 | | |