COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-08-04 09:59 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-08-04 00:001284.21    2026-08-05 05:001283.8
2026-08-03 00:001284.36    2026-08-05 11:001283.71
2026-08-02 00:001284.44    2026-08-05 17:001283.63
2026-08-01 00:001285.01    2026-08-05 23:001283.54
2026-07-31 00:001285.45    2026-08-06 05:001283.45
2026-07-30 00:001285.69    2026-08-06 11:001283.37
2026-07-29 00:001285.89    2026-08-06 17:001283.28
2026-07-28 00:001286.37    2026-08-06 23:001283.2
2026-07-27 00:001286.63    2026-08-07 05:001283.11
2026-07-26 00:001286.83    2026-08-07 11:001283.03
2026-07-25 00:001287.5    2026-08-07 17:001282.96
      2026-08-07 23:001282.88
      2026-08-08 05:001282.81
      2026-08-08 11:001282.73
      2026-08-08 17:001282.66
      2026-08-08 23:001282.58
      2026-08-09 05:001282.5
      2026-08-09 11:001282.43
      2026-08-09 17:001282.35
      2026-08-09 23:001282.27
      2026-08-10 05:001282.2
      2026-08-10 11:001282.13
      2026-08-10 17:001282.05
      2026-08-10 23:001281.98
      2026-08-11 05:001281.91
      2026-08-11 11:001281.84
      2026-08-11 17:001281.76
      2026-08-11 23:001281.69
      2026-08-12 05:001281.62
      2026-08-12 11:001281.56
      2026-08-12 17:001281.49
      2026-08-12 23:001281.42
      2026-08-13 05:001281.35
      2026-08-13 11:001281.29
      2026-08-13 17:001281.22
      2026-08-13 23:001281.16
      2026-08-14 05:001281.09