COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-09-06 08:13 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-09-07 00:001277.76    2026-09-07 11:001277.94
2026-09-06 00:001277.43    2026-09-07 17:001278.01
2026-09-05 00:001277.17    2026-09-07 23:001278.09
2026-09-04 00:001276.76    2026-09-08 05:001278.17
2026-09-03 00:001276.64    2026-09-08 11:001278.25
2026-09-02 00:001276.78    2026-09-08 17:001278.33
2026-09-01 00:001277.43    2026-09-08 23:001278.41
2026-08-31 00:001277.5    2026-09-09 05:001278.49
2026-08-30 00:001277.4    2026-09-09 11:001278.57
2026-08-29 00:001277.27    2026-09-09 17:001278.65
2026-08-28 00:001277.34    2026-09-09 23:001278.74
      2026-09-10 05:001278.82
      2026-09-10 11:001278.9
      2026-09-10 17:001278.98
      2026-09-10 23:001279.05
      2026-09-11 05:001279.13
      2026-09-11 11:001279.2
      2026-09-11 17:001279.26
      2026-09-11 23:001279.32
      2026-09-12 05:001279.37
      2026-09-12 11:001279.42
      2026-09-12 17:001279.47
      2026-09-12 23:001279.51
      2026-09-13 05:001279.56
      2026-09-13 11:001279.61
      2026-09-13 17:001279.65
      2026-09-13 23:001279.7
      2026-09-14 05:001279.76
      2026-09-14 11:001279.83
      2026-09-14 17:001279.9
      2026-09-14 23:001279.98
      2026-09-15 05:001280.05
      2026-09-15 11:001280.11
      2026-09-15 17:001280.18
      2026-09-15 23:001280.24
      2026-09-16 05:001280.31