COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-06-20 10:38 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-06-20 00:001282.98    2026-06-20 17:001283.45
2026-06-19 00:001282.95    2026-06-20 23:001283.52
2026-06-18 00:001282.21    2026-06-21 05:001283.59
2026-06-17 00:001281.32    2026-06-21 11:001283.67
2026-06-16 00:001281.16    2026-06-21 17:001283.72
2026-06-15 00:001281.43    2026-06-21 23:001283.77
2026-06-14 00:001281.55    2026-06-22 05:001283.83
2026-06-13 00:001281.58    2026-06-22 11:001283.88
2026-06-12 00:001281.06    2026-06-22 17:001283.94
2026-06-11 00:001280.08    2026-06-22 23:001283.99
2026-06-10 00:001278.74    2026-06-23 05:001284.05
      2026-06-23 11:001284.1
      2026-06-23 17:001284.15
      2026-06-23 23:001284.21
      2026-06-24 05:001284.26
      2026-06-24 11:001284.32
      2026-06-24 17:001284.37
      2026-06-24 23:001284.43
      2026-06-25 05:001284.48
      2026-06-25 11:001284.53
      2026-06-25 17:001284.59
      2026-06-25 23:001284.64
      2026-06-26 05:001284.7
      2026-06-26 11:001284.75
      2026-06-26 17:001284.81
      2026-06-26 23:001284.86
      2026-06-27 05:001284.91
      2026-06-27 11:001284.97
      2026-06-27 17:001285.02
      2026-06-27 23:001285.08
      2026-06-28 05:001285.13
      2026-06-28 11:001285.19
      2026-06-28 17:001285.24
      2026-06-28 23:001285.3
      2026-06-29 05:001285.35
      2026-06-29 11:001285.4
      2026-06-29 17:001285.46
      2026-06-29 23:001285.51
      2026-06-30 05:001285.57