COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-08-22 09:26 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-08-23 00:001278.98    2026-08-23 11:001278.73
2026-08-22 00:001279.08    2026-08-23 17:001278.67
2026-08-21 00:001279.41    2026-08-23 23:001278.61
2026-08-20 00:001279.85    2026-08-24 05:001278.56
2026-08-19 00:001280.1    2026-08-24 11:001278.51
2026-08-18 00:001280.4    2026-08-24 17:001278.46
2026-08-17 00:001280.75    2026-08-24 23:001278.41
2026-08-16 00:001281.13    2026-08-25 05:001278.36
2026-08-15 00:001281.59    2026-08-25 11:001278.31
2026-08-14 00:001281.88    2026-08-25 17:001278.26
2026-08-13 00:001282.11    2026-08-25 23:001278.21
      2026-08-26 05:001278.16
      2026-08-26 11:001278.11
      2026-08-26 17:001278.06
      2026-08-26 23:001278.01
      2026-08-27 05:001277.96
      2026-08-27 11:001277.91
      2026-08-27 17:001277.86
      2026-08-27 23:001277.81
      2026-08-28 05:001277.76
      2026-08-28 11:001277.71
      2026-08-28 17:001277.66
      2026-08-28 23:001277.61
      2026-08-29 05:001277.56
      2026-08-29 11:001277.5
      2026-08-29 17:001277.45
      2026-08-29 23:001277.4
      2026-08-30 05:001277.35
      2026-08-30 11:001277.3
      2026-08-30 17:001277.25
      2026-08-30 23:001277.2
      2026-08-31 05:001277.15
      2026-08-31 11:001277.1
      2026-08-31 17:001277.05
      2026-08-31 23:001277
      2026-09-01 05:001277.02