COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2025-07-15 14:00 | 102713 | | |
| 2025-07-15 13:00 | 97675 | | |
| 2025-07-15 12:00 | 92112 | | |
| 2025-07-15 11:00 | 86369 | | |
| 2025-07-15 10:00 | 81306 | | |
| 2025-07-15 09:00 | 76287 | | |
| 2025-07-15 08:00 | 70556 | | |
| 2025-07-15 07:00 | 63562 | | |
| 2025-07-15 06:00 | 55269 | | |
| 2025-07-15 05:00 | 48269 | | |
| 2025-07-15 04:00 | 45550 | | |
| 2025-07-15 03:00 | 47944 | | |
| 2025-07-15 02:00 | 55275 | | |
| 2025-07-15 01:00 | 66531 | | |
| 2025-07-15 00:00 | 78994 | | |
| 2025-07-14 23:00 | 88688 | | |
| 2025-07-14 22:00 | 94850 | | |
| 2025-07-14 21:00 | 100219 | | |
| 2025-07-14 20:00 | 103888 | | |
| 2025-07-14 19:00 | 103562 | | |
| 2025-07-14 18:00 | 101125 | | |
| 2025-07-14 17:00 | 98612 | | |
| 2025-07-14 16:00 | 96544 | | |
| 2025-07-14 15:00 | 95656 | | |
| 2025-07-14 14:00 | 95350 | | |
| 2025-07-14 13:00 | 94075 | | |
| 2025-07-14 12:00 | 91631 | | |
| 2025-07-14 11:00 | 88225 | | |
| 2025-07-14 10:00 | 83362 | | |
| 2025-07-14 09:00 | 77331 | | |
| 2025-07-14 08:00 | 71906 | | |
| 2025-07-14 07:00 | 68519 | | |
| 2025-07-14 06:00 | 65856 | | |
| 2025-07-14 05:00 | 62163 | | |
| 2025-07-14 04:00 | 59681 | | |
| 2025-07-14 03:00 | 61513 | | |
| 2025-07-14 02:00 | 67919 | | |
| 2025-07-14 01:00 | 79263 | | |
| 2025-07-14 00:00 | 94719 | | |
| 2025-07-13 23:00 | 109900 | | |
| 2025-07-13 22:00 | 122875 | | |
| 2025-07-13 21:00 | 134287 | | |
| 2025-07-13 20:00 | 140175 | | |
| 2025-07-13 19:00 | 137981 | | |
| 2025-07-13 18:00 | 133381 | | |
| 2025-07-13 17:00 | 129269 | | |
| 2025-07-13 16:00 | 121775 | | |
| 2025-07-13 15:00 | 111713 | | |
| 2025-07-13 14:00 | 104206 | | |
| 2025-07-13 13:00 | 99769 | | |
| 2025-07-13 12:00 | 95419 | | |
| 2025-07-13 11:00 | 89356 | | |
| 2025-07-13 10:00 | 80669 | | |
| 2025-07-13 09:00 | 69206 | | |
| 2025-07-13 08:00 | 58862 | | |
| 2025-07-13 07:00 | 55006 | | |
| 2025-07-13 06:00 | 57481 | | |
| 2025-07-13 05:00 | 62419 | | |
| 2025-07-13 04:00 | 68119 | | |
| 2025-07-13 03:00 | 75375 | | |
| 2025-07-13 02:00 | 83931 | | |
| 2025-07-13 01:00 | 91463 | | |
| 2025-07-13 00:00 | 97594 | | |
| 2025-07-12 23:00 | 104800 | | |
| 2025-07-12 22:00 | 115300 | | |
| 2025-07-12 21:00 | 128300 | | |
| 2025-07-12 20:00 | 139625 | | |
| 2025-07-12 19:00 | 147694 | | |
| 2025-07-12 18:00 | 150662 | | |
| 2025-07-12 17:00 | 140175 | | |
| 2025-07-12 16:00 | 115831 | | |
| 2025-07-12 15:00 | 90450 | | |
| 2025-07-12 14:00 | 71838 | | |
| 2025-07-12 13:00 | 58319 | | |
| 2025-07-12 12:00 | 49144 | | |
| 2025-07-12 11:00 | 45250 | | |
| 2025-07-12 10:00 | 44725 | | |
| 2025-07-12 09:00 | 45531 | | |
| 2025-07-12 08:00 | 47237 | | |
| 2025-07-12 07:00 | 48188 | | |
| 2025-07-12 06:00 | 47587 | | |
| 2025-07-12 05:00 | 47194 | | |
| 2025-07-12 04:00 | 48369 | | |
| 2025-07-12 03:00 | 52319 | | |
| 2025-07-12 02:00 | 59737 | | |
| 2025-07-12 01:00 | 68850 | | |
| 2025-07-12 00:00 | 78875 | | |
| 2025-07-11 23:00 | 90513 | | |
| 2025-07-11 22:00 | 102825 | | |
| 2025-07-11 21:00 | 114031 | | |
| 2025-07-11 20:00 | 121019 | | |
| 2025-07-11 19:00 | 122838 | | |
| 2025-07-11 18:00 | 122419 | | |
| 2025-07-11 17:00 | 117706 | | |
| 2025-07-11 16:00 | 105744 | | |
| 2025-07-11 15:00 | 91656 | | |
| 2025-07-11 14:00 | 80463 | | |
| 2025-07-11 13:00 | 72100 | | |
| 2025-07-11 12:00 | 64513 | | |
| 2025-07-11 11:00 | 55525 | | |
| 2025-07-11 10:00 | 46331 | | |
| 2025-07-11 09:00 | 40400 | | |
| 2025-07-11 08:00 | 38969 | | |
| 2025-07-11 07:00 | 39706 | | |
| 2025-07-11 06:00 | 38906 | | |
| 2025-07-11 05:00 | 36481 | | |
| 2025-07-11 04:00 | 36112 | | |
| 2025-07-11 03:00 | 41006 | | |
| 2025-07-11 02:00 | 50794 | | |
| 2025-07-11 01:00 | 61675 | | |
| 2025-07-11 00:00 | 72006 | | |
| 2025-07-10 23:00 | 82156 | | |
| 2025-07-10 22:00 | 90781 | | |
| 2025-07-10 21:00 | 97256 | | |
| 2025-07-10 20:00 | 100362 | | |
| 2025-07-10 19:00 | 98888 | | |
| 2025-07-10 18:00 | 94519 | | |
| 2025-07-10 17:00 | 86981 | | |
| 2025-07-10 16:00 | 75694 | | |
| 2025-07-10 15:00 | 64631 | | |
| 2025-07-10 14:00 | 57206 | | |
| 2025-07-10 13:00 | 52275 | | |
| 2025-07-10 12:00 | 47025 | | |
| 2025-07-10 11:00 | 41244 | | |
| 2025-07-10 10:00 | 37069 | | |
| 2025-07-10 09:00 | 35406 | | |
| 2025-07-10 08:00 | 36156 | | |
| 2025-07-10 07:00 | 39225 | | |
| 2025-07-10 06:00 | 43031 | | |
| 2025-07-10 05:00 | 45600 | | |
| 2025-07-10 04:00 | 47131 | | |
| 2025-07-10 03:00 | 49644 | | |
| 2025-07-10 02:00 | 54944 | | |
| 2025-07-10 01:00 | 62513 | | |
| 2025-07-10 00:00 | 70106 | | |
| 2025-07-09 23:00 | 76162 | | |
| 2025-07-09 22:00 | 80431 | | |
| 2025-07-09 21:00 | 83775 | | |
| 2025-07-09 20:00 | 86706 | | |
| 2025-07-09 19:00 | 88331 | | |
| 2025-07-09 18:00 | 87037 | | |
| 2025-07-09 17:00 | 82794 | | |
| 2025-07-09 16:00 | 78125 | | |
| 2025-07-09 15:00 | 73919 | | |
| 2025-07-09 14:00 | 69138 | | |
| 2025-07-09 13:00 | 64138 | | |
| 2025-07-09 12:00 | 58931 | | |
| 2025-07-09 11:00 | 52994 | | |
| 2025-07-09 10:00 | 47325 | | |
| 2025-07-09 09:00 | 43419 | | |
| 2025-07-09 08:00 | 41894 | | |
| 2025-07-09 07:00 | 42206 | | |
| 2025-07-09 06:00 | 43181 | | |
| 2025-07-09 05:00 | 44100 | | |
| 2025-07-09 04:00 | 45594 | | |
| 2025-07-09 03:00 | 49594 | | |
| 2025-07-09 02:00 | 56688 | | |
| 2025-07-09 01:00 | 65144 | | |
| 2025-07-09 00:00 | 74275 | | |
| 2025-07-08 23:00 | 83644 | | |
| 2025-07-08 22:00 | 90769 | | |
| 2025-07-08 21:00 | 95050 | | |
| 2025-07-08 20:00 | 98231 | | |
| 2025-07-08 19:00 | 100600 | | |
| 2025-07-08 18:00 | 100688 | | |
| 2025-07-08 17:00 | 96213 | | |
| 2025-07-08 16:00 | 87019 | | |
| 2025-07-08 15:00 | 76394 | | |
| 2025-07-08 14:00 | 66700 | | |
| 2025-07-08 13:00 | 58337 | | |
| 2025-07-08 12:00 | 52487 | | |
| 2025-07-08 11:00 | 49894 | | |
| 2025-07-08 10:00 | 48806 | | |
| 2025-07-08 09:00 | 47381 | | |
| 2025-07-08 08:00 | 47131 | | |
| 2025-07-08 07:00 | 49956 | | |
| 2025-07-08 06:00 | 52700 | | |
| 2025-07-08 05:00 | 51469 | | |
| 2025-07-08 04:00 | 47819 | | |
| 2025-07-08 03:00 | 45544 | | |
| 2025-07-08 02:00 | 45987 | | |
| 2025-07-08 01:00 | 48156 | | |
| 2025-07-08 00:00 | 52600 | | |
| 2025-07-07 23:00 | 61438 | | |
| 2025-07-07 22:00 | 74725 | | |
| 2025-07-07 21:00 | 90169 | | |
| 2025-07-07 20:00 | 103250 | | |
| 2025-07-07 19:00 | 110881 | | |
| 2025-07-07 18:00 | 114287 | | |
| 2025-07-07 17:00 | 114213 | | |
| 2025-07-07 16:00 | 110281 | | |
| 2025-07-07 15:00 | 104075 | | |
| 2025-07-07 14:00 | 97388 | | |
| 2025-07-07 13:00 | 91506 | | |
| 2025-07-07 12:00 | 88237 | | |
| 2025-07-07 11:00 | 87688 | | |
| 2025-07-07 10:00 | 87487 | | |
| 2025-07-07 09:00 | 86662 | | |
| 2025-07-07 08:00 | 86375 | | |
| 2025-07-07 07:00 | 84756 | | |
| 2025-07-07 06:00 | 78850 | | |
| 2025-07-07 05:00 | 72088 | | |
| 2025-07-07 04:00 | 69381 | | |
| 2025-07-07 03:00 | 70019 | | |
| 2025-07-07 02:00 | 70350 | | |
| 2025-07-07 01:00 | 66619 | | |
| 2025-07-07 00:00 | 59875 | | |
| 2025-07-06 23:00 | 57294 | | |
| 2025-07-06 22:00 | 62569 | | |
| 2025-07-06 21:00 | 71500 | | |
| 2025-07-06 20:00 | 76713 | | |
| 2025-07-06 19:00 | 75475 | | |
| 2025-07-06 18:00 | 73444 | | |
| 2025-07-06 17:00 | 76612 | | |
| 2025-07-06 16:00 | 84175 | | |
| 2025-07-06 15:00 | 91250 | | |
| 2025-07-06 14:00 | 94213 | | |
| 2025-07-06 13:00 | 94225 | | |
| 2025-07-06 12:00 | 95731 | | |
| 2025-07-06 11:00 | 99237 | | |
| 2025-07-06 10:00 | 100150 | | |
| 2025-07-06 09:00 | 97175 | | |
| 2025-07-06 08:00 | 93069 | | |
| 2025-07-06 07:00 | 88425 | | |
| 2025-07-06 06:00 | 83275 | | |
| 2025-07-06 05:00 | 79406 | | |
| 2025-07-06 04:00 | 76969 | | |
| 2025-07-06 03:00 | 74119 | | |
| 2025-07-06 02:00 | 70150 | | |
| 2025-07-06 01:00 | 67031 | | |
| 2025-07-06 00:00 | 68150 | | |
| 2025-07-05 23:00 | 73806 | | |
| 2025-07-05 22:00 | 80450 | | |
| 2025-07-05 21:00 | 85069 | | |
| 2025-07-05 20:00 | 86006 | | |
| 2025-07-05 19:00 | 83400 | | |
| 2025-07-05 18:00 | 79475 | | |
| 2025-07-05 17:00 | 75162 | | |
| 2025-07-05 16:00 | 70500 | | |
| 2025-07-05 15:00 | 66031 | | |
| 2025-07-05 14:00 | 61931 | | |
| 2025-07-05 13:00 | 58156 | | |
| 2025-07-05 12:00 | 53487 | | |
| 2025-07-05 11:00 | 47725 | | |
| 2025-07-05 10:00 | 44050 | | |
| 2025-07-05 09:00 | 44006 | | |
| 2025-07-05 08:00 | 45169 | | |
| 2025-07-05 07:00 | 46981 | | |
| 2025-07-05 06:00 | 52875 | | |
| 2025-07-05 05:00 | 62719 | | |
| 2025-07-05 04:00 | 70912 | | |
| 2025-07-05 03:00 | 75894 | | |
| 2025-07-05 02:00 | 81469 | | |
| 2025-07-05 01:00 | 88294 | | |
| 2025-07-05 00:00 | 93350 | | |
| 2025-07-04 23:00 | 95662 | | |
| 2025-07-04 22:00 | 96144 | | |
| 2025-07-04 21:00 | 95162 | | |
| 2025-07-04 20:00 | 92981 | | |
| 2025-07-04 19:00 | 89950 | | |
| 2025-07-04 18:00 | 86200 | | |
| 2025-07-04 17:00 | 82056 | | |