COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-05-31 09:31 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-05-31 00:001271.93    2026-05-31 11:001273.47
2026-05-30 00:001270.22    2026-05-31 17:001273.76
2026-05-29 00:001269.38    2026-05-31 23:001274.06
2026-05-28 00:001268.89    2026-06-01 05:001274.37
2026-05-27 00:001268.13    2026-06-01 11:001274.69
2026-05-26 00:001267.39    2026-06-01 17:001275.03
2026-05-25 00:001266.66    2026-06-01 23:001275.37
2026-05-24 00:001265.46    2026-06-02 05:001275.72
2026-05-23 00:001264.92    2026-06-02 11:001276.08
2026-05-22 00:001264.36    2026-06-02 17:001276.44
2026-05-21 00:001263.6    2026-06-02 23:001276.79
      2026-06-03 05:001277.14
      2026-06-03 11:001277.47
      2026-06-03 17:001277.8
      2026-06-03 23:001278.12
      2026-06-04 05:001278.43
      2026-06-04 11:001278.72
      2026-06-04 17:001279
      2026-06-04 23:001279.26
      2026-06-05 05:001279.49
      2026-06-05 11:001279.71
      2026-06-05 17:001279.91
      2026-06-05 23:001280.09
      2026-06-06 05:001280.26
      2026-06-06 11:001280.42
      2026-06-06 17:001280.58
      2026-06-06 23:001280.75
      2026-06-07 05:001280.91
      2026-06-07 11:001281.06
      2026-06-07 17:001281.21
      2026-06-07 23:001281.35
      2026-06-08 05:001281.49
      2026-06-08 11:001281.62
      2026-06-08 17:001281.75
      2026-06-08 23:001281.88
      2026-06-09 05:001281.99
      2026-06-09 11:001282.1
      2026-06-09 17:001282.2
      2026-06-09 23:001282.3
      2026-06-10 05:001282.38