COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-07-17 09:54 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-07-17 00:001288.57    2026-07-17 23:001288.56
2026-07-16 00:001288.56    2026-07-18 05:001288.47
2026-07-15 00:001288.55    2026-07-18 11:001288.38
2026-07-14 00:001288.74    2026-07-18 17:001288.28
2026-07-13 00:001288.98    2026-07-18 23:001288.19
2026-07-12 00:001289.15    2026-07-19 05:001288.09
2026-07-11 00:001289.21    2026-07-19 11:001288
2026-07-10 00:001289.11    2026-07-19 17:001287.9
2026-07-09 00:001288.84    2026-07-19 23:001287.81
2026-07-08 00:001288.3    2026-07-20 05:001287.72
2026-07-07 00:001287.59    2026-07-20 11:001287.62
      2026-07-20 17:001287.53
      2026-07-20 23:001287.44
      2026-07-21 05:001287.34
      2026-07-21 11:001287.24
      2026-07-21 17:001287.15
      2026-07-21 23:001287.05
      2026-07-22 05:001286.95
      2026-07-22 11:001286.85
      2026-07-22 17:001286.75
      2026-07-22 23:001286.65
      2026-07-23 05:001286.54
      2026-07-23 11:001286.44
      2026-07-23 17:001286.34
      2026-07-23 23:001286.23
      2026-07-24 05:001286.13
      2026-07-24 11:001286.02
      2026-07-24 17:001285.91
      2026-07-24 23:001285.81
      2026-07-25 05:001285.7
      2026-07-25 11:001285.59
      2026-07-25 17:001285.48
      2026-07-25 23:001285.37
      2026-07-26 05:001285.26
      2026-07-26 11:001285.15
      2026-07-26 17:001285.04
      2026-07-26 23:001284.93
      2026-07-27 05:001284.81