COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-09-19 09:48 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-09-19 00:001282.65    2026-09-19 23:001283.22
2026-09-18 00:001282.26    2026-09-20 05:001283.29
2026-09-17 00:001281.94    2026-09-20 11:001283.37
2026-09-16 00:001280.43    2026-09-20 17:001283.45
2026-09-15 00:001280.74    2026-09-20 23:001283.53
2026-09-14 00:001280.33    2026-09-21 05:001283.65
2026-09-13 00:001279.96    2026-09-21 11:001283.79
2026-09-12 00:001279.49    2026-09-21 17:001283.93
2026-09-11 00:001279.14    2026-09-21 23:001284.07
2026-09-10 00:001278.77    2026-09-22 05:001284.21
2026-09-09 00:001278.44    2026-09-22 11:001284.35
      2026-09-22 17:001284.48
      2026-09-22 23:001284.62
      2026-09-23 05:001284.75
      2026-09-23 11:001284.88
      2026-09-23 17:001285.01
      2026-09-23 23:001285.13
      2026-09-24 05:001285.25
      2026-09-24 11:001285.37
      2026-09-24 17:001285.48
      2026-09-24 23:001285.6
      2026-09-25 05:001285.71
      2026-09-25 11:001285.82
      2026-09-25 17:001285.93
      2026-09-25 23:001286.03
      2026-09-26 05:001286.14
      2026-09-26 11:001286.23
      2026-09-26 17:001286.32
      2026-09-26 23:001286.39
      2026-09-27 05:001286.45
      2026-09-27 11:001286.51
      2026-09-27 17:001286.56
      2026-09-27 23:001286.62
      2026-09-28 05:001286.67
      2026-09-28 11:001286.72
      2026-09-28 17:001286.77
      2026-09-28 23:001286.81
      2026-09-29 05:001286.86