COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-09-25 08:13 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-09-25 00:001284.81    2026-09-25 23:001285.15
2026-09-24 00:001284.55    2026-09-26 05:001285.19
2026-09-23 00:001284.08    2026-09-26 11:001285.22
2026-09-22 00:001283.63    2026-09-26 17:001285.25
2026-09-21 00:001283.33    2026-09-26 23:001285.28
2026-09-20 00:001283.11    2026-09-27 05:001285.3
2026-09-19 00:001282.65    2026-09-27 11:001285.3
2026-09-18 00:001282.26    2026-09-27 17:001285.29
2026-09-17 00:001281.94    2026-09-27 23:001285.29
2026-09-16 00:001280.43    2026-09-28 05:001285.31
2026-09-15 00:001280.74    2026-09-28 11:001285.36
      2026-09-28 17:001285.4
      2026-09-28 23:001285.44
      2026-09-29 05:001285.48
      2026-09-29 11:001285.52
      2026-09-29 17:001285.54
      2026-09-29 23:001285.55
      2026-09-30 05:001285.54
      2026-09-30 11:001285.53
      2026-09-30 17:001285.51
      2026-09-30 23:001285.5
      2026-10-01 05:001285.52
      2026-10-01 11:001285.54
      2026-10-01 17:001285.56
      2026-10-01 23:001285.58
      2026-10-02 05:001285.6
      2026-10-02 11:001285.62
      2026-10-02 17:001285.64
      2026-10-02 23:001285.66
      2026-10-03 05:001285.68
      2026-10-03 11:001285.7
      2026-10-03 17:001285.72
      2026-10-03 23:001285.74
      2026-10-04 05:001285.76
      2026-10-04 11:001285.78
      2026-10-04 17:001285.8
      2026-10-04 23:001285.82
      2026-10-05 05:001285.84