COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-10-23 07:57 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-10-23 00:001287.37    2026-10-23 11:001287.52
2026-10-22 00:001287.27    2026-10-23 17:001287.53
2026-10-21 00:001287.2    2026-10-23 23:001287.55
2026-10-20 00:001287.04    2026-10-24 05:001287.56
2026-10-19 00:001286.9    2026-10-24 11:001287.58
2026-10-18 00:001286.82    2026-10-24 17:001287.6
2026-10-17 00:001286.48    2026-10-24 23:001287.61
2026-10-16 00:001285.99    2026-10-25 05:001287.63
2026-10-15 00:001285.62    2026-10-25 11:001287.65
2026-10-14 00:001285.31    2026-10-25 17:001287.66
2026-10-13 00:001285.21    2026-10-25 23:001287.68
      2026-10-26 05:001287.69
      2026-10-26 11:001287.71
      2026-10-26 17:001287.73
      2026-10-26 23:001287.74
      2026-10-27 05:001287.76
      2026-10-27 11:001287.77
      2026-10-27 17:001287.79
      2026-10-27 23:001287.81
      2026-10-28 05:001287.82
      2026-10-28 11:001287.84
      2026-10-28 17:001287.85
      2026-10-28 23:001287.87
      2026-10-29 05:001287.89
      2026-10-29 11:001287.9
      2026-10-29 17:001287.92
      2026-10-29 23:001287.93
      2026-10-30 05:001287.95
      2026-10-30 11:001287.97
      2026-10-30 17:001287.98
      2026-10-30 23:001288
      2026-10-31 05:001287.96
      2026-10-31 11:001287.86
      2026-10-31 17:001287.74
      2026-11-01 00:001287.62
      2026-11-01 05:001287.48
      2026-11-01 11:001287.32
      2026-11-01 17:001287.15
      2026-11-01 23:001286.95
      2026-11-02 05:001286.74