COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-09-16 07:58 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-09-16 00:001280.43    2026-09-16 17:001282.02
2026-09-15 00:001280.74    2026-09-16 23:001282.13
2026-09-14 00:001280.33    2026-09-17 05:001282.23
2026-09-13 00:001279.96    2026-09-17 11:001282.34
2026-09-12 00:001279.49    2026-09-17 17:001282.45
2026-09-11 00:001279.14    2026-09-17 23:001282.56
2026-09-10 00:001278.77    2026-09-18 05:001282.68
2026-09-09 00:001278.44    2026-09-18 11:001282.79
2026-09-08 00:001278.19    2026-09-18 17:001282.91
2026-09-07 00:001277.76    2026-09-18 23:001283.02
2026-09-06 00:001277.43    2026-09-19 05:001283.11
      2026-09-19 11:001283.18
      2026-09-19 17:001283.23
      2026-09-19 23:001283.29
      2026-09-20 05:001283.34
      2026-09-20 11:001283.39
      2026-09-20 17:001283.44
      2026-09-20 23:001283.48
      2026-09-21 05:001283.56
      2026-09-21 11:001283.65
      2026-09-21 17:001283.75
      2026-09-21 23:001283.84
      2026-09-22 05:001283.94
      2026-09-22 11:001284.05
      2026-09-22 17:001284.16
      2026-09-22 23:001284.28
      2026-09-23 05:001284.4
      2026-09-23 11:001284.52
      2026-09-23 17:001284.65
      2026-09-23 23:001284.77
      2026-09-24 05:001284.88
      2026-09-24 11:001285
      2026-09-24 17:001285.11
      2026-09-24 23:001285.22
      2026-09-25 05:001285.33
      2026-09-25 11:001285.43
      2026-09-25 17:001285.53
      2026-09-25 23:001285.63
      2026-09-26 05:001285.73