COLUMBIA--GRAND COULEE DAM (GCDW1)
| Observed |
| Date/Time (PDT) | Discharge |
| 2026-05-10 21:00 | 149400 | | |
| 2026-05-10 20:00 | 150012 | | |
| 2026-05-10 19:00 | 138681 | | |
| 2026-05-10 18:00 | 118713 | | |
| 2026-05-10 17:00 | 99263 | | |
| 2026-05-10 16:00 | 87700 | | |
| 2026-05-10 15:00 | 84388 | | |
| 2026-05-10 14:00 | 85812 | | |
| 2026-05-10 13:00 | 89856 | | |
| 2026-05-10 12:00 | 96444 | | |
| 2026-05-10 11:00 | 103856 | | |
| 2026-05-10 10:00 | 107381 | | |
| 2026-05-10 09:00 | 105812 | | |
| 2026-05-10 08:00 | 104294 | | |
| 2026-05-10 07:00 | 106869 | | |
| 2026-05-10 06:00 | 111787 | | |
| 2026-05-10 05:00 | 116569 | | |
| 2026-05-10 04:00 | 122250 | | |
| 2026-05-10 03:00 | 130019 | | |
| 2026-05-10 02:00 | 139056 | | |
| 2026-05-10 01:00 | 148350 | | |
| 2026-05-10 00:00 | 156075 | | |
| 2026-05-09 23:00 | 159919 | | |
| 2026-05-09 22:00 | 161275 | | |
| 2026-05-09 21:00 | 163050 | | |
| 2026-05-09 20:00 | 161731 | | |
| 2026-05-09 19:00 | 150456 | | |
| 2026-05-09 18:00 | 131144 | | |
| 2026-05-09 17:00 | 113350 | | |
| 2026-05-09 16:00 | 101388 | | |
| 2026-05-09 15:00 | 93831 | | |
| 2026-05-09 14:00 | 89862 | | |
| 2026-05-09 13:00 | 87844 | | |
| 2026-05-09 12:00 | 86269 | | |
| 2026-05-09 11:00 | 86375 | | |
| 2026-05-09 10:00 | 88606 | | |
| 2026-05-09 09:00 | 93463 | | |
| 2026-05-09 08:00 | 105150 | | |
| 2026-05-09 07:00 | 122306 | | |
| 2026-05-09 06:00 | 134194 | | |
| 2026-05-09 05:00 | 136400 | | |
| 2026-05-09 04:00 | 133456 | | |
| 2026-05-09 03:00 | 128200 | | |
| 2026-05-09 02:00 | 123487 | | |
| 2026-05-09 01:00 | 123037 | | |
| 2026-05-09 00:00 | 126362 | | |
| 2026-05-08 23:00 | 130006 | | |
| 2026-05-08 22:00 | 132250 | | |
| 2026-05-08 21:00 | 134169 | | |
| 2026-05-08 20:00 | 132963 | | |
| 2026-05-08 19:00 | 120881 | | |
| 2026-05-08 18:00 | 99037 | | |
| 2026-05-08 17:00 | 79775 | | |
| 2026-05-08 16:00 | 70844 | | |
| 2026-05-08 15:00 | 71031 | | |
| 2026-05-08 14:00 | 77375 | | |
| 2026-05-08 13:00 | 85494 | | |
| 2026-05-08 12:00 | 90412 | | |
| 2026-05-08 11:00 | 92106 | | |
| 2026-05-08 10:00 | 94950 | | |
| 2026-05-08 09:00 | 101731 | | |
| 2026-05-08 08:00 | 109719 | | |
| 2026-05-08 07:00 | 114513 | | |
| 2026-05-08 06:00 | 115425 | | |
| 2026-05-08 05:00 | 114000 | | |
| 2026-05-08 04:00 | 112544 | | |
| 2026-05-08 03:00 | 113362 | | |
| 2026-05-08 02:00 | 116088 | | |
| 2026-05-08 01:00 | 118744 | | |
| 2026-05-08 00:00 | 123419 | | |
| 2026-05-07 23:00 | 134044 | | |
| 2026-05-07 22:00 | 147106 | | |
| 2026-05-07 21:00 | 154088 | | |
| 2026-05-07 20:00 | 149631 | | |
| 2026-05-07 19:00 | 134438 | | |
| 2026-05-07 18:00 | 115875 | | |
| 2026-05-07 17:00 | 101919 | | |
| 2026-05-07 16:00 | 94562 | | |
| 2026-05-07 15:00 | 92263 | | |
| 2026-05-07 14:00 | 91513 | | |
| 2026-05-07 13:00 | 87612 | | |
| 2026-05-07 12:00 | 81106 | | |
| 2026-05-07 11:00 | 76750 | | |
| 2026-05-07 10:00 | 76469 | | |
| 2026-05-07 09:00 | 80225 | | |
| 2026-05-07 08:00 | 86500 | | |
| 2026-05-07 07:00 | 89138 | | |
| 2026-05-07 06:00 | 82675 | | |
| 2026-05-07 05:00 | 70912 | | |
| 2026-05-07 04:00 | 62237 | | |
| 2026-05-07 03:00 | 60788 | | |
| 2026-05-07 02:00 | 67106 | | |
| 2026-05-07 01:00 | 79494 | | |
| 2026-05-07 00:00 | 94525 | | |
| 2026-05-06 23:00 | 108581 | | |
| 2026-05-06 22:00 | 118606 | | |
| 2026-05-06 21:00 | 124537 | | |
| 2026-05-06 20:00 | 126369 | | |
| 2026-05-06 19:00 | 118688 | | |
| 2026-05-06 18:00 | 99431 | | |
| 2026-05-06 17:00 | 79006 | | |
| 2026-05-06 16:00 | 67112 | | |
| 2026-05-06 15:00 | 62644 | | |
| 2026-05-06 14:00 | 62425 | | |
| 2026-05-06 13:00 | 64075 | | |
| 2026-05-06 12:00 | 65569 | | |
| 2026-05-06 11:00 | 68463 | | |
| 2026-05-06 10:00 | 74194 | | |
| 2026-05-06 09:00 | 81806 | | |
| 2026-05-06 08:00 | 90062 | | |
| 2026-05-06 07:00 | 96219 | | |
| 2026-05-06 06:00 | 97013 | | |
| 2026-05-06 05:00 | 94750 | | |
| 2026-05-06 04:00 | 96531 | | |
| 2026-05-06 03:00 | 105025 | | |
| 2026-05-06 02:00 | 117869 | | |
| 2026-05-06 01:00 | 133306 | | |
| 2026-05-06 00:00 | 148181 | | |
| 2026-05-05 23:00 | 157106 | | |
| 2026-05-05 22:00 | 159031 | | |
| 2026-05-05 21:00 | 158744 | | |
| 2026-05-05 20:00 | 159488 | | |
| 2026-05-05 19:00 | 159044 | | |
| 2026-05-05 18:00 | 155606 | | |
| 2026-05-05 17:00 | 152731 | | |
| 2026-05-05 16:00 | 153488 | | |
| 2026-05-05 15:00 | 155294 | | |
| 2026-05-05 14:00 | 154544 | | |
| 2026-05-05 13:00 | 149619 | | |
| 2026-05-05 12:00 | 141575 | | |
| 2026-05-05 11:00 | 134694 | | |
| 2026-05-05 10:00 | 131713 | | |
| 2026-05-05 09:00 | 131194 | | |
| 2026-05-05 08:00 | 129188 | | |
| 2026-05-05 07:00 | 122306 | | |
| 2026-05-05 06:00 | 111888 | | |
| 2026-05-05 05:00 | 102688 | | |
| 2026-05-05 04:00 | 97344 | | |
| 2026-05-05 03:00 | 95950 | | |
| 2026-05-05 02:00 | 100775 | | |
| 2026-05-05 01:00 | 114481 | | |
| 2026-05-05 00:00 | 133731 | | |
| 2026-05-04 23:00 | 151419 | | |
| 2026-05-04 22:00 | 162900 | | |
| 2026-05-04 21:00 | 169150 | | |
| 2026-05-04 20:00 | 174738 | | |
| 2026-05-04 19:00 | 180400 | | |
| 2026-05-04 18:00 | 181162 | | |
| 2026-05-04 17:00 | 173412 | | |
| 2026-05-04 16:00 | 161894 | | |
| 2026-05-04 15:00 | 154012 | | |
| 2026-05-04 14:00 | 148269 | | |
| 2026-05-04 13:00 | 139988 | | |
| 2026-05-04 12:00 | 131125 | | |
| 2026-05-04 11:00 | 126194 | | |
| 2026-05-04 10:00 | 128144 | | |
| 2026-05-04 09:00 | 135062 | | |
| 2026-05-04 08:00 | 138644 | | |
| 2026-05-04 07:00 | 134356 | | |
| 2026-05-04 06:00 | 125494 | | |
| 2026-05-04 05:00 | 116550 | | |
| 2026-05-04 04:00 | 111438 | | |
| 2026-05-04 03:00 | 112362 | | |
| 2026-05-04 02:00 | 119338 | | |
| 2026-05-04 01:00 | 131213 | | |
| 2026-05-04 00:00 | 144963 | | |
| 2026-05-03 23:00 | 156950 | | |
| 2026-05-03 22:00 | 163775 | | |
| 2026-05-03 21:00 | 164719 | | |
| 2026-05-03 20:00 | 162113 | | |
| 2026-05-03 19:00 | 155356 | | |
| 2026-05-03 18:00 | 144050 | | |
| 2026-05-03 17:00 | 131863 | | |
| 2026-05-03 16:00 | 120206 | | |
| 2026-05-03 15:00 | 109956 | | |
| 2026-05-03 14:00 | 104669 | | |
| 2026-05-03 13:00 | 104144 | | |
| 2026-05-03 12:00 | 103519 | | |
| 2026-05-03 11:00 | 100269 | | |
| 2026-05-03 10:00 | 97681 | | |
| 2026-05-03 09:00 | 100737 | | |
| 2026-05-03 08:00 | 108350 | | |
| 2026-05-03 07:00 | 113906 | | |
| 2026-05-03 06:00 | 115656 | | |
| 2026-05-03 05:00 | 117494 | | |
| 2026-05-03 04:00 | 121025 | | |
| 2026-05-03 03:00 | 126362 | | |
| 2026-05-03 02:00 | 134650 | | |
| 2026-05-03 01:00 | 146463 | | |
| 2026-05-03 00:00 | 160463 | | |
| 2026-05-02 23:00 | 171481 | | |
| 2026-05-02 22:00 | 175213 | | |
| 2026-05-02 21:00 | 174506 | | |
| 2026-05-02 20:00 | 170894 | | |
| 2026-05-02 19:00 | 158981 | | |
| 2026-05-02 18:00 | 137569 | | |
| 2026-05-02 17:00 | 112850 | | |
| 2026-05-02 16:00 | 91575 | | |
| 2026-05-02 15:00 | 78956 | | |
| 2026-05-02 14:00 | 75588 | | |
| 2026-05-02 13:00 | 77263 | | |
| 2026-05-02 12:00 | 80681 | | |
| 2026-05-02 11:00 | 84237 | | |
| 2026-05-02 10:00 | 87394 | | |
| 2026-05-02 09:00 | 93925 | | |
| 2026-05-02 08:00 | 109388 | | |
| 2026-05-02 07:00 | 130344 | | |
| 2026-05-02 06:00 | 145556 | | |
| 2026-05-02 05:00 | 152144 | | |
| 2026-05-02 04:00 | 156275 | | |
| 2026-05-02 03:00 | 161044 | | |
| 2026-05-02 02:00 | 166037 | | |
| 2026-05-02 01:00 | 171162 | | |
| 2026-05-02 00:00 | 176075 | | |
| 2026-05-01 23:00 | 179306 | | |
| 2026-05-01 22:00 | 180525 | | |
| 2026-05-01 21:00 | 180206 | | |
| 2026-05-01 20:00 | 174981 | | |
| 2026-05-01 19:00 | 163762 | | |
| 2026-05-01 18:00 | 154169 | | |
| 2026-05-01 17:00 | 150300 | | |
| 2026-05-01 16:00 | 147050 | | |
| 2026-05-01 15:00 | 141912 | | |
| 2026-05-01 14:00 | 136594 | | |
| 2026-05-01 13:00 | 132456 | | |
| 2026-05-01 12:00 | 132625 | | |
| 2026-05-01 11:00 | 139125 | | |
| 2026-05-01 10:00 | 149113 | | |
| 2026-05-01 09:00 | 159363 | | |
| 2026-05-01 08:00 | 169525 | | |
| 2026-05-01 07:00 | 176669 | | |
| 2026-05-01 06:00 | 175019 | | |
| 2026-05-01 05:00 | 166769 | | |
| 2026-05-01 04:00 | 160869 | | |
| 2026-05-01 03:00 | 160750 | | |
| 2026-05-01 02:00 | 164213 | | |
| 2026-05-01 01:00 | 169100 | | |
| 2026-05-01 00:00 | 172231 | | |
| 2026-04-30 23:00 | 170175 | | |
| 2026-04-30 22:00 | 166625 | | |
| 2026-04-30 21:00 | 168875 | | |
| 2026-04-30 20:00 | 171969 | | |
| 2026-04-30 19:00 | 160375 | | |
| 2026-04-30 18:00 | 131550 | | |
| 2026-04-30 17:00 | 103569 | | |