COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PST) | Discharge |
| 2026-02-16 20:00 | 151775 | | |
| 2026-02-16 19:00 | 151312 | | |
| 2026-02-16 18:00 | 151025 | | |
| 2026-02-16 17:00 | 150850 | | |
| 2026-02-16 16:00 | 150425 | | |
| 2026-02-16 15:00 | 150900 | | |
| 2026-02-16 14:00 | 153100 | | |
| 2026-02-16 13:00 | 154556 | | |
| 2026-02-16 12:00 | 152506 | | |
| 2026-02-16 11:00 | 149119 | | |
| 2026-02-16 10:00 | 146225 | | |
| 2026-02-16 09:00 | 140781 | | |
| 2026-02-16 08:00 | 134056 | | |
| 2026-02-16 07:00 | 131762 | | |
| 2026-02-16 06:00 | 132506 | | |
| 2026-02-16 05:00 | 131544 | | |
| 2026-02-16 04:00 | 129050 | | |
| 2026-02-16 03:00 | 127056 | | |
| 2026-02-16 02:00 | 126525 | | |
| 2026-02-16 01:00 | 125463 | | |
| 2026-02-16 00:00 | 122200 | | |
| 2026-02-15 23:00 | 120656 | | |
| 2026-02-15 22:00 | 122950 | | |
| 2026-02-15 21:00 | 126181 | | |
| 2026-02-15 20:00 | 128500 | | |
| 2026-02-15 19:00 | 127000 | | |
| 2026-02-15 18:00 | 117237 | | |
| 2026-02-15 17:00 | 101156 | | |
| 2026-02-15 16:00 | 87662 | | |
| 2026-02-15 15:00 | 83013 | | |
| 2026-02-15 14:00 | 85963 | | |
| 2026-02-15 13:00 | 92319 | | |
| 2026-02-15 12:00 | 99325 | | |
| 2026-02-15 11:00 | 106025 | | |
| 2026-02-15 10:00 | 112287 | | |
| 2026-02-15 09:00 | 117700 | | |
| 2026-02-15 08:00 | 120694 | | |
| 2026-02-15 07:00 | 120650 | | |
| 2026-02-15 06:00 | 119731 | | |
| 2026-02-15 05:00 | 119812 | | |
| 2026-02-15 04:00 | 120456 | | |
| 2026-02-15 03:00 | 120156 | | |
| 2026-02-15 02:00 | 119150 | | |
| 2026-02-15 01:00 | 119750 | | |
| 2026-02-15 00:00 | 121612 | | |
| 2026-02-14 23:00 | 121869 | | |
| 2026-02-14 22:00 | 120856 | | |
| 2026-02-14 21:00 | 121438 | | |
| 2026-02-14 20:00 | 123156 | | |
| 2026-02-14 19:00 | 122519 | | |
| 2026-02-14 18:00 | 118069 | | |
| 2026-02-14 17:00 | 112044 | | |
| 2026-02-14 16:00 | 107688 | | |
| 2026-02-14 15:00 | 106031 | | |
| 2026-02-14 14:00 | 106700 | | |
| 2026-02-14 13:00 | 110369 | | |
| 2026-02-14 12:00 | 116850 | | |
| 2026-02-14 11:00 | 122475 | | |
| 2026-02-14 10:00 | 123562 | | |
| 2026-02-14 09:00 | 119919 | | |
| 2026-02-14 08:00 | 112944 | | |
| 2026-02-14 07:00 | 104812 | | |
| 2026-02-14 06:00 | 97912 | | |
| 2026-02-14 05:00 | 93325 | | |
| 2026-02-14 04:00 | 92075 | | |
| 2026-02-14 03:00 | 94444 | | |
| 2026-02-14 02:00 | 99062 | | |
| 2026-02-14 01:00 | 105456 | | |
| 2026-02-14 00:00 | 112625 | | |
| 2026-02-13 23:00 | 117544 | | |
| 2026-02-13 22:00 | 120575 | | |
| 2026-02-13 21:00 | 125431 | | |
| 2026-02-13 20:00 | 132188 | | |
| 2026-02-13 19:00 | 136825 | | |
| 2026-02-13 18:00 | 136175 | | |
| 2026-02-13 17:00 | 131250 | | |
| 2026-02-13 16:00 | 125850 | | |
| 2026-02-13 15:00 | 123612 | | |
| 2026-02-13 14:00 | 125862 | | |
| 2026-02-13 13:00 | 128350 | | |
| 2026-02-13 12:00 | 125350 | | |
| 2026-02-13 11:00 | 118806 | | |
| 2026-02-13 10:00 | 116181 | | |
| 2026-02-13 09:00 | 119544 | | |
| 2026-02-13 08:00 | 122000 | | |
| 2026-02-13 07:00 | 118562 | | |
| 2026-02-13 06:00 | 114400 | | |
| 2026-02-13 05:00 | 114794 | | |
| 2026-02-13 04:00 | 117150 | | |
| 2026-02-13 03:00 | 118556 | | |
| 2026-02-13 02:00 | 120125 | | |
| 2026-02-13 01:00 | 122575 | | |
| 2026-02-13 00:00 | 125031 | | |
| 2026-02-12 23:00 | 126175 | | |
| 2026-02-12 22:00 | 125831 | | |
| 2026-02-12 21:00 | 126644 | | |
| 2026-02-12 20:00 | 129694 | | |
| 2026-02-12 19:00 | 131850 | | |
| 2026-02-12 18:00 | 129031 | | |
| 2026-02-12 17:00 | 118475 | | |
| 2026-02-12 16:00 | 103537 | | |
| 2026-02-12 15:00 | 94356 | | |
| 2026-02-12 14:00 | 96006 | | |
| 2026-02-12 13:00 | 103325 | | |
| 2026-02-12 12:00 | 110969 | | |
| 2026-02-12 11:00 | 119069 | | |
| 2026-02-12 10:00 | 128300 | | |
| 2026-02-12 09:00 | 136544 | | |
| 2026-02-12 08:00 | 142250 | | |
| 2026-02-12 07:00 | 145469 | | |
| 2026-02-12 06:00 | 143688 | | |
| 2026-02-12 05:00 | 135456 | | |
| 2026-02-12 04:00 | 125750 | | |
| 2026-02-12 03:00 | 119556 | | |
| 2026-02-12 02:00 | 117200 | | |
| 2026-02-12 01:00 | 117400 | | |
| 2026-02-12 00:00 | 118625 | | |
| 2026-02-11 23:00 | 119463 | | |
| 2026-02-11 22:00 | 119781 | | |
| 2026-02-11 21:00 | 120450 | | |
| 2026-02-11 20:00 | 120688 | | |
| 2026-02-11 19:00 | 116338 | | |
| 2026-02-11 18:00 | 104906 | | |
| 2026-02-11 17:00 | 91219 | | |
| 2026-02-11 16:00 | 82275 | | |
| 2026-02-11 15:00 | 79850 | | |
| 2026-02-11 14:00 | 82400 | | |
| 2026-02-11 13:00 | 89612 | | |
| 2026-02-11 12:00 | 102725 | | |
| 2026-02-11 11:00 | 120438 | | |
| 2026-02-11 10:00 | 136856 | | |
| 2026-02-11 09:00 | 147162 | | |
| 2026-02-11 08:00 | 150650 | | |
| 2026-02-11 07:00 | 147613 | | |
| 2026-02-11 06:00 | 140419 | | |
| 2026-02-11 05:00 | 134181 | | |
| 2026-02-11 04:00 | 130969 | | |
| 2026-02-11 03:00 | 128694 | | |
| 2026-02-11 02:00 | 126188 | | |
| 2026-02-11 01:00 | 124250 | | |
| 2026-02-11 00:00 | 123531 | | |
| 2026-02-10 23:00 | 123812 | | |
| 2026-02-10 22:00 | 124763 | | |
| 2026-02-10 21:00 | 126275 | | |
| 2026-02-10 20:00 | 126975 | | |
| 2026-02-10 19:00 | 125094 | | |
| 2026-02-10 18:00 | 121675 | | |
| 2026-02-10 17:00 | 118737 | | |
| 2026-02-10 16:00 | 116069 | | |
| 2026-02-10 15:00 | 113656 | | |
| 2026-02-10 14:00 | 113562 | | |
| 2026-02-10 13:00 | 117844 | | |
| 2026-02-10 12:00 | 126769 | | |
| 2026-02-10 11:00 | 137306 | | |
| 2026-02-10 10:00 | 145488 | | |
| 2026-02-10 09:00 | 151100 | | |
| 2026-02-10 08:00 | 154463 | | |
| 2026-02-10 07:00 | 152438 | | |
| 2026-02-10 06:00 | 142631 | | |
| 2026-02-10 05:00 | 129144 | | |
| 2026-02-10 04:00 | 119463 | | |
| 2026-02-10 03:00 | 115644 | | |
| 2026-02-10 02:00 | 116256 | | |
| 2026-02-10 01:00 | 121444 | | |
| 2026-02-10 00:00 | 128619 | | |
| 2026-02-09 23:00 | 132844 | | |
| 2026-02-09 22:00 | 133725 | | |
| 2026-02-09 21:00 | 135025 | | |
| 2026-02-09 20:00 | 137469 | | |
| 2026-02-09 19:00 | 137238 | | |
| 2026-02-09 18:00 | 134113 | | |
| 2026-02-09 17:00 | 132319 | | |
| 2026-02-09 16:00 | 132463 | | |
| 2026-02-09 15:00 | 132506 | | |
| 2026-02-09 14:00 | 131725 | | |
| 2026-02-09 13:00 | 130256 | | |
| 2026-02-09 12:00 | 129250 | | |
| 2026-02-09 11:00 | 129188 | | |
| 2026-02-09 10:00 | 128894 | | |
| 2026-02-09 09:00 | 127162 | | |
| 2026-02-09 08:00 | 122931 | | |
| 2026-02-09 07:00 | 116862 | | |
| 2026-02-09 06:00 | 111894 | | |
| 2026-02-09 05:00 | 108969 | | |
| 2026-02-09 04:00 | 106506 | | |
| 2026-02-09 03:00 | 103869 | | |
| 2026-02-09 02:00 | 101794 | | |
| 2026-02-09 01:00 | 102250 | | |
| 2026-02-09 00:00 | 107956 | | |
| 2026-02-08 23:00 | 117956 | | |
| 2026-02-08 22:00 | 127694 | | |
| 2026-02-08 21:00 | 135750 | | |
| 2026-02-08 20:00 | 143169 | | |
| 2026-02-08 19:00 | 149369 | | |
| 2026-02-08 18:00 | 151306 | | |
| 2026-02-08 17:00 | 143706 | | |
| 2026-02-08 16:00 | 128438 | | |
| 2026-02-08 15:00 | 116281 | | |
| 2026-02-08 14:00 | 111950 | | |
| 2026-02-08 13:00 | 111912 | | |
| 2026-02-08 12:00 | 112750 | | |
| 2026-02-08 11:00 | 112500 | | |
| 2026-02-08 10:00 | 111200 | | |
| 2026-02-08 09:00 | 110431 | | |
| 2026-02-08 08:00 | 108463 | | |
| 2026-02-08 07:00 | 101188 | | |
| 2026-02-08 06:00 | 91119 | | |
| 2026-02-08 05:00 | 85244 | | |
| 2026-02-08 04:00 | 84306 | | |
| 2026-02-08 03:00 | 84981 | | |
| 2026-02-08 02:00 | 86481 | | |
| 2026-02-08 01:00 | 89619 | | |
| 2026-02-08 00:00 | 93775 | | |
| 2026-02-07 23:00 | 96794 | | |
| 2026-02-07 22:00 | 98912 | | |
| 2026-02-07 21:00 | 103731 | | |
| 2026-02-07 20:00 | 112994 | | |
| 2026-02-07 19:00 | 122500 | | |
| 2026-02-07 18:00 | 124731 | | |
| 2026-02-07 17:00 | 116869 | | |
| 2026-02-07 16:00 | 105444 | | |
| 2026-02-07 15:00 | 99619 | | |
| 2026-02-07 14:00 | 100906 | | |
| 2026-02-07 13:00 | 104119 | | |
| 2026-02-07 12:00 | 105694 | | |
| 2026-02-07 11:00 | 106450 | | |
| 2026-02-07 10:00 | 107675 | | |
| 2026-02-07 09:00 | 108150 | | |
| 2026-02-07 08:00 | 106819 | | |
| 2026-02-07 07:00 | 104994 | | |
| 2026-02-07 06:00 | 103975 | | |
| 2026-02-07 05:00 | 103875 | | |
| 2026-02-07 04:00 | 104263 | | |
| 2026-02-07 03:00 | 104237 | | |
| 2026-02-07 02:00 | 103269 | | |
| 2026-02-07 01:00 | 101456 | | |
| 2026-02-07 00:00 | 99938 | | |
| 2026-02-06 23:00 | 100550 | | |
| 2026-02-06 22:00 | 103544 | | |
| 2026-02-06 21:00 | 107931 | | |
| 2026-02-06 20:00 | 112150 | | |
| 2026-02-06 19:00 | 113737 | | |
| 2026-02-06 18:00 | 111237 | | |
| 2026-02-06 17:00 | 105525 | | |
| 2026-02-06 16:00 | 99575 | | |
| 2026-02-06 15:00 | 96644 | | |
| 2026-02-06 14:00 | 97881 | | |
| 2026-02-06 13:00 | 103719 | | |
| 2026-02-06 12:00 | 114050 | | |
| 2026-02-06 11:00 | 125319 | | |
| 2026-02-06 10:00 | 135419 | | |
| 2026-02-06 09:00 | 147162 | | |
| 2026-02-06 08:00 | 157406 | | |
| 2026-02-06 07:00 | 156631 | | |
| 2026-02-06 06:00 | 145188 | | |
| 2026-02-06 05:00 | 132225 | | |
| 2026-02-06 04:00 | 122369 | | |
| 2026-02-06 03:00 | 116031 | | |
| 2026-02-06 02:00 | 112806 | | |
| 2026-02-06 01:00 | 111138 | | |
| 2026-02-06 00:00 | 110763 | | |
| 2026-02-05 23:00 | 112888 | | |
| 2026-02-05 22:00 | 117756 | | |
| 2026-02-05 21:00 | 124588 | | |
| 2026-02-05 20:00 | 130262 | | |
| 2026-02-05 19:00 | 130000 | | |
| 2026-02-05 18:00 | 123950 | | |
| 2026-02-05 17:00 | 115775 | | |
| 2026-02-05 16:00 | 106737 | | |