COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-05-26 16:26 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-05-27 00:001268.13    2026-05-27 11:001268.25
2026-05-26 00:001267.39    2026-05-27 17:001268.28
2026-05-25 00:001266.66    2026-05-27 23:001268.3
2026-05-24 00:001265.46    2026-05-28 05:001268.33
2026-05-23 00:001264.92    2026-05-28 11:001268.35
2026-05-22 00:001264.36    2026-05-28 17:001268.38
2026-05-21 00:001263.6    2026-05-28 23:001268.4
2026-05-20 00:001262.87    2026-05-29 05:001268.43
2026-05-19 00:001262.35    2026-05-29 11:001268.47
2026-05-18 00:001261.14    2026-05-29 17:001268.53
2026-05-17 00:001259.44    2026-05-29 23:001268.6
      2026-05-30 05:001268.7
      2026-05-30 11:001268.81
      2026-05-30 17:001268.95
      2026-05-30 23:001269.11
      2026-05-31 05:001269.29
      2026-05-31 11:001269.49
      2026-05-31 17:001269.72
      2026-05-31 23:001269.96
      2026-06-01 05:001270.23
      2026-06-01 11:001270.5
      2026-06-01 17:001270.8
      2026-06-01 23:001271.09
      2026-06-02 05:001271.4
      2026-06-02 11:001271.71
      2026-06-02 17:001272.02
      2026-06-02 23:001272.33
      2026-06-03 05:001272.63
      2026-06-03 11:001272.94
      2026-06-03 17:001273.24
      2026-06-03 23:001273.53
      2026-06-04 05:001273.82
      2026-06-04 11:001274.1
      2026-06-04 17:001274.37
      2026-06-04 23:001274.64
      2026-06-05 05:001274.9