COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-07-20 10:41 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-07-20 00:001288.58    2026-07-20 23:001288.34
2026-07-19 00:001288.69    2026-07-21 05:001288.29
2026-07-18 00:001288.76    2026-07-21 11:001288.23
2026-07-17 00:001288.57    2026-07-21 17:001288.18
2026-07-16 00:001288.56    2026-07-21 23:001288.13
2026-07-15 00:001288.55    2026-07-22 05:001288.07
2026-07-14 00:001288.74    2026-07-22 11:001288.02
2026-07-13 00:001288.98    2026-07-22 17:001287.97
2026-07-12 00:001289.15    2026-07-22 23:001287.91
2026-07-11 00:001289.21    2026-07-23 05:001287.86
2026-07-10 00:001289.11    2026-07-23 11:001287.8
      2026-07-23 17:001287.75
      2026-07-23 23:001287.69
      2026-07-24 05:001287.63
      2026-07-24 11:001287.58
      2026-07-24 17:001287.52
      2026-07-24 23:001287.46
      2026-07-25 05:001287.41
      2026-07-25 11:001287.35
      2026-07-25 17:001287.29
      2026-07-25 23:001287.23
      2026-07-26 05:001287.18
      2026-07-26 11:001287.12
      2026-07-26 17:001287.05
      2026-07-26 23:001286.99
      2026-07-27 05:001286.93
      2026-07-27 11:001286.86
      2026-07-27 17:001286.8
      2026-07-27 23:001286.73
      2026-07-28 05:001286.66
      2026-07-28 11:001286.59
      2026-07-28 17:001286.52
      2026-07-28 23:001286.45
      2026-07-29 05:001286.38
      2026-07-29 11:001286.31
      2026-07-29 17:001286.24
      2026-07-29 23:001286.17
      2026-07-30 05:001286.1