COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-07-23 09:24 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-07-23 00:001288.07    2026-07-23 23:001287.69
2026-07-22 00:001288.42    2026-07-24 05:001287.62
2026-07-21 00:001288.46    2026-07-24 11:001287.55
2026-07-20 00:001288.58    2026-07-24 17:001287.47
2026-07-19 00:001288.69    2026-07-24 23:001287.39
2026-07-18 00:001288.76    2026-07-25 05:001287.3
2026-07-17 00:001288.57    2026-07-25 11:001287.22
2026-07-16 00:001288.56    2026-07-25 17:001287.15
2026-07-15 00:001288.55    2026-07-25 23:001287.08
2026-07-14 00:001288.74    2026-07-26 05:001287.02
2026-07-13 00:001288.98    2026-07-26 11:001286.96
      2026-07-26 17:001286.9
      2026-07-26 23:001286.83
      2026-07-27 05:001286.76
      2026-07-27 11:001286.69
      2026-07-27 17:001286.61
      2026-07-27 23:001286.53
      2026-07-28 05:001286.45
      2026-07-28 11:001286.37
      2026-07-28 17:001286.29
      2026-07-28 23:001286.21
      2026-07-29 05:001286.13
      2026-07-29 11:001286.05
      2026-07-29 17:001285.97
      2026-07-29 23:001285.89
      2026-07-30 05:001285.81
      2026-07-30 11:001285.73
      2026-07-30 17:001285.65
      2026-07-30 23:001285.57
      2026-07-31 05:001285.49
      2026-07-31 11:001285.41
      2026-07-31 17:001285.33
      2026-07-31 23:001285.25
      2026-08-01 05:001285.18
      2026-08-01 11:001285.11
      2026-08-01 17:001285.05
      2026-08-01 23:001284.99
      2026-08-02 05:001284.93