COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-08-19 09:41 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-08-20 00:001279.85    2026-08-20 05:001279.8
2026-08-19 00:001280.1    2026-08-20 11:001279.75
2026-08-18 00:001280.4    2026-08-20 17:001279.69
2026-08-17 00:001280.75    2026-08-20 23:001279.63
2026-08-16 00:001281.13    2026-08-21 05:001279.56
2026-08-15 00:001281.59    2026-08-21 11:001279.48
2026-08-14 00:001281.88    2026-08-21 17:001279.4
2026-08-13 00:001282.11    2026-08-21 23:001279.32
2026-08-12 00:001282.46    2026-08-22 05:001279.24
2026-08-11 00:001282.75    2026-08-22 11:001279.16
2026-08-10 00:001282.83    2026-08-22 17:001279.08
      2026-08-22 23:001279
      2026-08-23 05:001278.92
      2026-08-23 11:001278.83
      2026-08-23 17:001278.75
      2026-08-23 23:001278.67
      2026-08-24 05:001278.62
      2026-08-24 11:001278.57
      2026-08-24 17:001278.52
      2026-08-24 23:001278.47
      2026-08-25 05:001278.41
      2026-08-25 11:001278.36
      2026-08-25 17:001278.31
      2026-08-25 23:001278.26
      2026-08-26 05:001278.2
      2026-08-26 11:001278.15
      2026-08-26 17:001278.1
      2026-08-26 23:001278.05
      2026-08-27 05:001278
      2026-08-27 11:001277.94
      2026-08-27 17:001277.89
      2026-08-27 23:001277.84
      2026-08-28 05:001277.79
      2026-08-28 11:001277.73
      2026-08-28 17:001277.68
      2026-08-28 23:001277.63
      2026-08-29 05:001277.58