COLUMBIA--GRAND COULEE DAM (GCDW1)

Observed    Forecast/Trend Issued: 2026-05-17 09:05 PDT
Date/Time (PDT)Pool Height    Date/Time (PDT)Pool Height
2026-05-17 00:001259.44    2026-05-18 05:001261.59
2026-05-16 00:001258.22    2026-05-18 11:001261.81
2026-05-15 00:001257.07    2026-05-18 17:001262.02
2026-05-14 00:001256.2    2026-05-18 23:001262.22
2026-05-13 00:001255.67    2026-05-19 05:001262.42
2026-05-12 00:001255.45    2026-05-19 11:001262.62
2026-05-11 00:001254.87    2026-05-19 17:001262.82
2026-05-10 00:001254.48    2026-05-19 23:001263.01
2026-05-09 00:001253.96    2026-05-20 05:001263.2
2026-05-08 00:001253.15    2026-05-20 11:001263.38
2026-05-07 00:001251.77    2026-05-20 17:001263.57
      2026-05-20 23:001263.75
      2026-05-21 05:001263.93
      2026-05-21 11:001264.1
      2026-05-21 17:001264.27
      2026-05-21 23:001264.44
      2026-05-22 05:001264.61
      2026-05-22 11:001264.77
      2026-05-22 17:001264.93
      2026-05-22 23:001265.08
      2026-05-23 05:001265.23
      2026-05-23 11:001265.38
      2026-05-23 17:001265.52
      2026-05-23 23:001265.67
      2026-05-24 05:001265.81
      2026-05-24 11:001265.95
      2026-05-24 17:001266.1
      2026-05-24 23:001266.24
      2026-05-25 05:001266.38
      2026-05-25 11:001266.51
      2026-05-25 17:001266.64
      2026-05-25 23:001266.77
      2026-05-26 05:001266.9
      2026-05-26 11:001267.02
      2026-05-26 17:001267.15
      2026-05-26 23:001267.27
      2026-05-27 05:001267.39