COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-05-10 13:58 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-05-10 00:001254.48    2026-05-10 23:001254.89
2026-05-09 00:001253.96    2026-05-11 05:001254.93
2026-05-08 00:001253.15    2026-05-11 11:001254.99
2026-05-07 00:001251.77    2026-05-11 17:001255.07
2026-05-06 00:001251.31    2026-05-11 23:001255.17
2026-05-05 00:001251.5    2026-05-12 05:001255.3
2026-05-04 00:001251.59    2026-05-12 11:001255.45
2026-05-03 00:001251.72    2026-05-12 17:001255.61
2026-05-02 00:001252.49    2026-05-12 23:001255.79
2026-05-01 00:001253.35    2026-05-13 05:001255.98
2026-04-30 00:001253.93    2026-05-13 11:001256.17
      2026-05-13 17:001256.37
      2026-05-13 23:001256.57
      2026-05-14 05:001256.79
      2026-05-14 11:001257
      2026-05-14 17:001257.22
      2026-05-14 23:001257.45
      2026-05-15 05:001257.68
      2026-05-15 11:001257.92
      2026-05-15 17:001258.16
      2026-05-15 23:001258.42
      2026-05-16 05:001258.68
      2026-05-16 11:001258.96
      2026-05-16 17:001259.24
      2026-05-16 23:001259.53
      2026-05-17 05:001259.82
      2026-05-17 11:001260.12
      2026-05-17 17:001260.4
      2026-05-17 23:001260.69
      2026-05-18 05:001260.97
      2026-05-18 11:001261.24
      2026-05-18 17:001261.5
      2026-05-18 23:001261.76
      2026-05-19 05:001262.01
      2026-05-19 11:001262.26
      2026-05-19 17:001262.52
      2026-05-19 23:001262.78
      2026-05-20 05:001263.05