COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-09-05 08:55 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-09-05 00:001277.17    2026-09-05 17:001277.59
2026-09-04 00:001276.76    2026-09-05 23:001277.67
2026-09-03 00:001276.64    2026-09-06 05:001277.75
2026-09-02 00:001276.78    2026-09-06 11:001277.81
2026-09-01 00:001277.43    2026-09-06 17:001277.88
2026-08-31 00:001277.5    2026-09-06 23:001277.94
2026-08-30 00:001277.4    2026-09-07 05:001278.01
2026-08-29 00:001277.27    2026-09-07 11:001278.1
2026-08-28 00:001277.34    2026-09-07 17:001278.19
2026-08-27 00:001277.72    2026-09-07 23:001278.27
2026-08-26 00:001278.3    2026-09-08 05:001278.35
      2026-09-08 11:001278.43
      2026-09-08 17:001278.51
      2026-09-08 23:001278.59
      2026-09-09 05:001278.67
      2026-09-09 11:001278.75
      2026-09-09 17:001278.83
      2026-09-09 23:001278.91
      2026-09-10 05:001278.98
      2026-09-10 11:001279.06
      2026-09-10 17:001279.14
      2026-09-10 23:001279.21
      2026-09-11 05:001279.28
      2026-09-11 11:001279.35
      2026-09-11 17:001279.41
      2026-09-11 23:001279.46
      2026-09-12 05:001279.51
      2026-09-12 11:001279.55
      2026-09-12 17:001279.6
      2026-09-12 23:001279.65
      2026-09-13 05:001279.69
      2026-09-13 11:001279.73
      2026-09-13 17:001279.78
      2026-09-13 23:001279.82
      2026-09-14 05:001279.88
      2026-09-14 11:001279.95
      2026-09-14 17:001280.02
      2026-09-14 23:001280.09
      2026-09-15 05:001280.16