COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-07-14 09:43 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-07-14 00:001288.74    2026-07-14 23:001288.38
2026-07-13 00:001288.98    2026-07-15 05:001288.31
2026-07-12 00:001289.15    2026-07-15 11:001288.24
2026-07-11 00:001289.21    2026-07-15 17:001288.18
2026-07-10 00:001289.11    2026-07-15 23:001288.11
2026-07-09 00:001288.84    2026-07-16 05:001288.04
2026-07-08 00:001288.3    2026-07-16 11:001287.98
2026-07-07 00:001287.59    2026-07-16 17:001287.91
2026-07-06 00:001286.88    2026-07-16 23:001287.84
2026-07-05 00:001286.51    2026-07-17 05:001287.76
2026-07-04 00:001286.25    2026-07-17 11:001287.69
      2026-07-17 17:001287.61
      2026-07-17 23:001287.54
      2026-07-18 05:001287.46
      2026-07-18 11:001287.38
      2026-07-18 17:001287.3
      2026-07-18 23:001287.21
      2026-07-19 05:001287.13
      2026-07-19 11:001287.04
      2026-07-19 17:001286.96
      2026-07-19 23:001286.87
      2026-07-20 05:001286.78
      2026-07-20 11:001286.69
      2026-07-20 17:001286.6
      2026-07-20 23:001286.5
      2026-07-21 05:001286.41
      2026-07-21 11:001286.31
      2026-07-21 17:001286.21
      2026-07-21 23:001286.11
      2026-07-22 05:001286.01
      2026-07-22 11:001285.9
      2026-07-22 17:001285.8
      2026-07-22 23:001285.69
      2026-07-23 05:001285.58
      2026-07-23 11:001285.47
      2026-07-23 17:001285.36
      2026-07-23 23:001285.24
      2026-07-24 05:001285.13