COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-08-26 08:41 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-08-26 00:001278.3    2026-08-26 11:001277.86
2026-08-25 00:001278.7    2026-08-26 17:001277.82
2026-08-24 00:001278.99    2026-08-26 23:001277.78
2026-08-23 00:001278.98    2026-08-27 05:001277.74
2026-08-22 00:001279.08    2026-08-27 11:001277.7
2026-08-21 00:001279.41    2026-08-27 17:001277.67
2026-08-20 00:001279.85    2026-08-27 23:001277.63
2026-08-19 00:001280.1    2026-08-28 05:001277.59
2026-08-18 00:001280.4    2026-08-28 11:001277.55
2026-08-17 00:001280.75    2026-08-28 17:001277.51
2026-08-16 00:001281.13    2026-08-28 23:001277.47
      2026-08-29 05:001277.43
      2026-08-29 11:001277.39
      2026-08-29 17:001277.35
      2026-08-29 23:001277.31
      2026-08-30 05:001277.28
      2026-08-30 11:001277.24
      2026-08-30 17:001277.2
      2026-08-30 23:001277.16
      2026-08-31 05:001277.12
      2026-08-31 11:001277.08
      2026-08-31 17:001277.04
      2026-08-31 23:001277
      2026-09-01 05:001276.96
      2026-09-01 11:001276.91
      2026-09-01 17:001276.86
      2026-09-01 23:001276.83
      2026-09-02 05:001276.79
      2026-09-02 11:001276.77
      2026-09-02 17:001276.75
      2026-09-02 23:001276.73
      2026-09-03 05:001276.72
      2026-09-03 11:001276.72
      2026-09-03 17:001276.72
      2026-09-03 23:001276.73
      2026-09-04 05:001276.74
      2026-09-04 11:001276.76
      2026-09-04 17:001276.77
      2026-09-04 23:001276.79
      2026-09-05 05:001276.8