COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-08-29 09:10 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-08-30 00:001277.4    2026-08-30 11:001277.27
2026-08-29 00:001277.27    2026-08-30 17:001277.23
2026-08-28 00:001277.34    2026-08-30 23:001277.18
2026-08-27 00:001277.72    2026-08-31 05:001277.14
2026-08-26 00:001278.3    2026-08-31 11:001277.09
2026-08-25 00:001278.7    2026-08-31 17:001277.05
2026-08-24 00:001278.99    2026-08-31 23:001277
2026-08-23 00:001278.98    2026-09-01 05:001277.05
2026-08-22 00:001279.08    2026-09-01 11:001277.19
2026-08-21 00:001279.41    2026-09-01 17:001277.33
2026-08-20 00:001279.85    2026-09-01 23:001277.47
      2026-09-02 05:001277.62
      2026-09-02 11:001277.76
      2026-09-02 17:001277.91
      2026-09-02 23:001278.06
      2026-09-03 05:001278.19
      2026-09-03 11:001278.32
      2026-09-03 17:001278.44
      2026-09-03 23:001278.57
      2026-09-04 05:001278.69
      2026-09-04 11:001278.82
      2026-09-04 17:001278.95
      2026-09-04 23:001279.08
      2026-09-05 05:001279.21
      2026-09-05 11:001279.34
      2026-09-05 17:001279.47
      2026-09-05 23:001279.6
      2026-09-06 05:001279.74
      2026-09-06 11:001279.87
      2026-09-06 17:001280
      2026-09-06 23:001280.13
      2026-09-07 05:001280.26
      2026-09-07 11:001280.38
      2026-09-07 17:001280.5
      2026-09-07 23:001280.61
      2026-09-08 05:001280.72