COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-07-29 08:14 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-07-29 00:001285.89    2026-07-29 23:001285.5
2026-07-28 00:001286.37    2026-07-30 05:001285.4
2026-07-27 00:001286.63    2026-07-30 11:001285.31
2026-07-26 00:001286.83    2026-07-30 17:001285.21
2026-07-25 00:001287.5    2026-07-30 23:001285.11
2026-07-24 00:001287.9    2026-07-31 05:001285.01
2026-07-23 00:001288.07    2026-07-31 11:001284.9
2026-07-22 00:001288.42    2026-07-31 17:001284.79
2026-07-21 00:001288.46    2026-07-31 23:001284.68
2026-07-20 00:001288.58    2026-08-01 05:001284.57
2026-07-19 00:001288.69    2026-08-01 11:001284.47
      2026-08-01 17:001284.37
      2026-08-01 23:001284.27
      2026-08-02 05:001284.17
      2026-08-02 11:001284.07
      2026-08-02 17:001283.98
      2026-08-02 23:001283.88
      2026-08-03 05:001283.78
      2026-08-03 11:001283.68
      2026-08-03 17:001283.58
      2026-08-03 23:001283.48
      2026-08-04 05:001283.37
      2026-08-04 11:001283.27
      2026-08-04 17:001283.17
      2026-08-04 23:001283.06
      2026-08-05 05:001282.96
      2026-08-05 11:001282.85
      2026-08-05 17:001282.75
      2026-08-05 23:001282.64
      2026-08-06 05:001282.54
      2026-08-06 11:001282.43
      2026-08-06 17:001282.32
      2026-08-06 23:001282.22
      2026-08-07 05:001282.11
      2026-08-07 11:001282
      2026-08-07 17:001281.9
      2026-08-07 23:001281.79
      2026-08-08 05:001281.68