COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-05-23 10:33 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-05-24 00:001265.46    2026-05-24 05:001265.66
2026-05-23 00:001264.92    2026-05-24 11:001265.81
2026-05-22 00:001264.36    2026-05-24 17:001265.97
2026-05-21 00:001263.6    2026-05-24 23:001266.13
2026-05-20 00:001262.87    2026-05-25 05:001266.28
2026-05-19 00:001262.35    2026-05-25 11:001266.44
2026-05-18 00:001261.14    2026-05-25 17:001266.59
2026-05-17 00:001259.44    2026-05-25 23:001266.75
2026-05-16 00:001258.22    2026-05-26 05:001266.91
2026-05-15 00:001257.07    2026-05-26 11:001267.07
2026-05-14 00:001256.2    2026-05-26 17:001267.23
      2026-05-26 23:001267.4
      2026-05-27 05:001267.56
      2026-05-27 11:001267.73
      2026-05-27 17:001267.91
      2026-05-27 23:001268.09
      2026-05-28 05:001268.27
      2026-05-28 11:001268.46
      2026-05-28 17:001268.65
      2026-05-28 23:001268.84
      2026-05-29 05:001269.03
      2026-05-29 11:001269.22
      2026-05-29 17:001269.41
      2026-05-29 23:001269.59
      2026-05-30 05:001269.77
      2026-05-30 11:001269.95
      2026-05-30 17:001270.12
      2026-05-30 23:001270.29
      2026-05-31 05:001270.46
      2026-05-31 11:001270.62
      2026-05-31 17:001270.78
      2026-05-31 23:001270.93
      2026-06-01 05:001271.09
      2026-06-01 11:001271.25
      2026-06-01 17:001271.41
      2026-06-01 23:001271.57
      2026-06-02 05:001271.72