COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-09-09 09:17 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-09-10 00:001278.77    2026-09-10 11:001278.97
2026-09-09 00:001278.44    2026-09-10 17:001279.05
2026-09-08 00:001278.19    2026-09-10 23:001279.14
2026-09-07 00:001277.76    2026-09-11 05:001279.22
2026-09-06 00:001277.43    2026-09-11 11:001279.3
2026-09-05 00:001277.17    2026-09-11 17:001279.38
2026-09-04 00:001276.76    2026-09-11 23:001279.44
2026-09-03 00:001276.64    2026-09-12 05:001279.5
2026-09-02 00:001276.78    2026-09-12 11:001279.56
2026-09-01 00:001277.43    2026-09-12 17:001279.61
2026-08-31 00:001277.5    2026-09-12 23:001279.66
      2026-09-13 05:001279.71
      2026-09-13 11:001279.76
      2026-09-13 17:001279.81
      2026-09-13 23:001279.85
      2026-09-14 05:001279.92
      2026-09-14 11:001280
      2026-09-14 17:001280.07
      2026-09-14 23:001280.15
      2026-09-15 05:001280.23
      2026-09-15 11:001280.32
      2026-09-15 17:001280.4
      2026-09-15 23:001280.48
      2026-09-16 05:001280.56
      2026-09-16 11:001280.64
      2026-09-16 17:001280.73
      2026-09-16 23:001280.81
      2026-09-17 05:001280.89
      2026-09-17 11:001280.97
      2026-09-17 17:001281.06
      2026-09-17 23:001281.14
      2026-09-18 05:001281.22
      2026-09-18 11:001281.3
      2026-09-18 17:001281.38
      2026-09-18 23:001281.46
      2026-09-19 05:001281.53