COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-10-27 08:18 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-10-28 00:001288.64    2026-10-28 11:001288.81
2026-10-27 00:001288.29    2026-10-28 17:001288.85
2026-10-26 00:001288.03    2026-10-28 23:001288.88
2026-10-25 00:001287.76    2026-10-29 05:001288.92
2026-10-24 00:001287.52    2026-10-29 11:001288.95
2026-10-23 00:001287.37    2026-10-29 17:001288.98
2026-10-22 00:001287.27    2026-10-29 23:001289.01
2026-10-21 00:001287.2    2026-10-30 05:001288.98
2026-10-20 00:001287.04    2026-10-30 11:001288.88
2026-10-19 00:001286.9    2026-10-30 17:001288.76
2026-10-18 00:001286.82    2026-10-30 23:001288.63
      2026-10-31 05:001288.47
      2026-10-31 11:001288.31
      2026-10-31 17:001288.12
      2026-11-01 00:001287.92
      2026-11-01 05:001287.7
      2026-11-01 11:001287.47
      2026-11-01 17:001287.25
      2026-11-01 23:001287.02
      2026-11-02 05:001286.79
      2026-11-02 11:001286.57
      2026-11-02 17:001286.34
      2026-11-02 23:001286.11
      2026-11-03 05:001285.89
      2026-11-03 11:001285.66
      2026-11-03 17:001285.44
      2026-11-03 23:001285.21
      2026-11-04 05:001284.98
      2026-11-04 11:001284.75
      2026-11-04 17:001284.52
      2026-11-04 23:001284.29
      2026-11-05 05:001284.06
      2026-11-05 11:001283.83
      2026-11-05 17:001283.61
      2026-11-05 23:001283.39
      2026-11-06 05:001283.19