COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-09-22 08:03 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-09-23 00:001284.08    2026-09-23 05:001284.24
2026-09-22 00:001283.63    2026-09-23 11:001284.33
2026-09-21 00:001283.33    2026-09-23 17:001284.44
2026-09-20 00:001283.11    2026-09-23 23:001284.55
2026-09-19 00:001282.65    2026-09-24 05:001284.64
2026-09-18 00:001282.26    2026-09-24 11:001284.72
2026-09-17 00:001281.94    2026-09-24 17:001284.8
2026-09-16 00:001280.43    2026-09-24 23:001284.88
2026-09-15 00:001280.74    2026-09-25 05:001284.96
2026-09-14 00:001280.33    2026-09-25 11:001285.03
2026-09-13 00:001279.96    2026-09-25 17:001285.11
      2026-09-25 23:001285.18
      2026-09-26 05:001285.24
      2026-09-26 11:001285.3
      2026-09-26 17:001285.35
      2026-09-26 23:001285.4
      2026-09-27 05:001285.44
      2026-09-27 11:001285.47
      2026-09-27 17:001285.5
      2026-09-27 23:001285.53
      2026-09-28 05:001285.58
      2026-09-28 11:001285.65
      2026-09-28 17:001285.73
      2026-09-28 23:001285.8
      2026-09-29 05:001285.86
      2026-09-29 11:001285.93
      2026-09-29 17:001285.98
      2026-09-29 23:001285.98
      2026-09-30 05:001285.99
      2026-09-30 11:001285.99
      2026-09-30 17:001286
      2026-09-30 23:001286
      2026-10-01 05:001286.02
      2026-10-01 11:001286.03
      2026-10-01 17:001286.05
      2026-10-01 23:001286.07
      2026-10-02 05:001286.08