COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-07-26 12:51 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-07-26 00:001286.83    2026-07-26 23:001286.73
2026-07-25 00:001287.5    2026-07-27 05:001286.65
2026-07-24 00:001287.9    2026-07-27 11:001286.57
2026-07-23 00:001288.07    2026-07-27 17:001286.49
2026-07-22 00:001288.42    2026-07-27 23:001286.41
2026-07-21 00:001288.46    2026-07-28 05:001286.33
2026-07-20 00:001288.58    2026-07-28 11:001286.25
2026-07-19 00:001288.69    2026-07-28 17:001286.16
2026-07-18 00:001288.76    2026-07-28 23:001286.08
2026-07-17 00:001288.57    2026-07-29 05:001286
2026-07-16 00:001288.56    2026-07-29 11:001285.92
      2026-07-29 17:001285.84
      2026-07-29 23:001285.75
      2026-07-30 05:001285.67
      2026-07-30 11:001285.59
      2026-07-30 17:001285.51
      2026-07-30 23:001285.43
      2026-07-31 05:001285.35
      2026-07-31 11:001285.27
      2026-07-31 17:001285.2
      2026-07-31 23:001285.1
      2026-08-01 05:001285
      2026-08-01 11:001284.89
      2026-08-01 17:001284.79
      2026-08-01 23:001284.69
      2026-08-02 05:001284.59
      2026-08-02 11:001284.49
      2026-08-02 17:001284.39
      2026-08-02 23:001284.29
      2026-08-03 05:001284.19
      2026-08-03 11:001284.09
      2026-08-03 17:001283.98
      2026-08-03 23:001283.88
      2026-08-04 05:001283.78
      2026-08-04 11:001283.67
      2026-08-04 17:001283.57
      2026-08-04 23:001283.46
      2026-08-05 05:001283.35