COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-06-26 08:36 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-06-26 00:001285.19    2026-06-26 17:001285.01
2026-06-25 00:001285.39    2026-06-26 23:001285
2026-06-24 00:001285.23    2026-06-27 05:001284.99
2026-06-23 00:001285.1    2026-06-27 11:001284.97
2026-06-22 00:001284.66    2026-06-27 17:001284.96
2026-06-21 00:001283.69    2026-06-27 23:001284.94
2026-06-20 00:001282.98    2026-06-28 05:001284.92
2026-06-19 00:001282.95    2026-06-28 11:001284.9
2026-06-18 00:001282.21    2026-06-28 17:001284.98
2026-06-17 00:001281.32    2026-06-28 23:001285.05
2026-06-16 00:001281.16    2026-06-29 05:001285.12
      2026-06-29 11:001285.2
      2026-06-29 17:001285.27
      2026-06-29 23:001285.34
      2026-06-30 05:001285.42
      2026-06-30 11:001285.49
      2026-06-30 17:001285.56
      2026-06-30 23:001285.63
      2026-07-01 05:001285.71
      2026-07-01 11:001285.78
      2026-07-01 17:001285.85
      2026-07-01 23:001285.93
      2026-07-02 05:001286
      2026-07-02 11:001286.07
      2026-07-02 17:001286.13
      2026-07-02 23:001286.2
      2026-07-03 05:001286.27
      2026-07-03 11:001286.33
      2026-07-03 17:001286.4
      2026-07-03 23:001286.47
      2026-07-04 05:001286.53
      2026-07-04 11:001286.6
      2026-07-04 17:001286.67
      2026-07-04 23:001286.73
      2026-07-05 05:001286.8
      2026-07-05 11:001286.87
      2026-07-05 17:001286.93
      2026-07-05 23:001287
      2026-07-06 05:001287.11