COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-09-28 09:50 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-09-29 00:001285.69    2026-09-29 05:001285.56
2026-09-28 00:001285.48    2026-09-29 11:001285.55
2026-09-27 00:001285.44    2026-09-29 17:001285.54
2026-09-26 00:001285.18    2026-09-29 23:001285.54
2026-09-25 00:001284.81    2026-09-30 05:001285.53
2026-09-24 00:001284.55    2026-09-30 11:001285.52
2026-09-23 00:001284.08    2026-09-30 17:001285.51
2026-09-22 00:001283.63    2026-09-30 23:001285.5
2026-09-21 00:001283.33    2026-10-01 05:001285.52
2026-09-20 00:001283.11    2026-10-01 11:001285.54
2026-09-19 00:001282.65    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
      2026-10-05 11:001285.86
      2026-10-05 17:001285.88
      2026-10-05 23:001285.9
      2026-10-06 05:001285.92
      2026-10-06 11:001285.94
      2026-10-06 17:001285.96
      2026-10-06 23:001285.98
      2026-10-07 05:001286
      2026-10-07 11:001286.02
      2026-10-07 17:001286.04
      2026-10-07 23:001286.06
      2026-10-08 05:001286.08