COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-08-16 10:10 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-08-17 00:001280.75    2026-08-17 11:001280.25
2026-08-16 00:001281.13    2026-08-17 17:001280.14
2026-08-15 00:001281.59    2026-08-17 23:001280.03
2026-08-14 00:001281.88    2026-08-18 05:001279.92
2026-08-13 00:001282.11    2026-08-18 11:001279.82
2026-08-12 00:001282.46    2026-08-18 17:001279.71
2026-08-11 00:001282.75    2026-08-18 23:001279.62
2026-08-10 00:001282.83    2026-08-19 05:001279.52
2026-08-09 00:001283    2026-08-19 11:001279.43
2026-08-08 00:001283.34    2026-08-19 17:001279.34
2026-08-07 00:001283.62    2026-08-19 23:001279.25
      2026-08-20 05:001279.15
      2026-08-20 11:001279.06
      2026-08-20 17:001278.96
      2026-08-20 23:001278.85
      2026-08-21 05:001278.75
      2026-08-21 11:001278.64
      2026-08-21 17:001278.54
      2026-08-21 23:001278.43
      2026-08-22 05:001278.32
      2026-08-22 11:001278.22
      2026-08-22 17:001278.11
      2026-08-22 23:001278
      2026-08-23 05:001277.9
      2026-08-23 11:001277.79
      2026-08-23 17:001277.69
      2026-08-23 23:001277.58
      2026-08-24 05:001277.48
      2026-08-24 11:001277.37
      2026-08-24 17:001277.27
      2026-08-24 23:001277.16
      2026-08-25 05:001277.16
      2026-08-25 11:001277.15
      2026-08-25 17:001277.14
      2026-08-25 23:001277.14
      2026-08-26 05:001277.13