COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-08-13 09:30 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-08-14 00:001281.88    2026-08-14 05:001281.68
2026-08-13 00:001282.11    2026-08-14 11:001281.59
2026-08-12 00:001282.46    2026-08-14 17:001281.5
2026-08-11 00:001282.75    2026-08-14 23:001281.4
2026-08-10 00:001282.83    2026-08-15 05:001281.29
2026-08-09 00:001283    2026-08-15 11:001281.19
2026-08-08 00:001283.34    2026-08-15 17:001281.07
2026-08-07 00:001283.62    2026-08-15 23:001280.96
2026-08-06 00:001283.81    2026-08-16 05:001280.84
2026-08-05 00:001284.03    2026-08-16 11:001280.73
2026-08-04 00:001284.21    2026-08-16 17:001280.62
      2026-08-16 23:001280.51
      2026-08-17 05:001280.4
      2026-08-17 11:001280.29
      2026-08-17 17:001280.18
      2026-08-17 23:001280.08
      2026-08-18 05:001279.97
      2026-08-18 11:001279.86
      2026-08-18 17:001279.76
      2026-08-18 23:001279.66
      2026-08-19 05:001279.56
      2026-08-19 11:001279.46
      2026-08-19 17:001279.36
      2026-08-19 23:001279.26
      2026-08-20 05:001279.16
      2026-08-20 11:001279.06
      2026-08-20 17:001278.96
      2026-08-20 23:001278.86
      2026-08-21 05:001278.76
      2026-08-21 11:001278.66
      2026-08-21 17:001278.56
      2026-08-21 23:001278.46
      2026-08-22 05:001278.35
      2026-08-22 11:001278.25
      2026-08-22 17:001278.15
      2026-08-22 23:001278.05
      2026-08-23 05:001277.95