CW3E Event Summary: 26 January – 2 February 2020

February 3, 2020

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Active weather pattern brings heavy rainfall and flooding to the Pacific Northwest

  • A series of landfalling ARs resulted in heavy precipitation and river flooding between the last week of January and beginning of February
  • The last landfalling AR produced AR3 conditions along the coast of Washington and Oregon
  • Total estimated 7-day precipitation between 26 Jan and 2 Feb exceeded 5 inches over portions of western WA and northwestern OR, with more than 10 inches over the Olympic Mountains and North Cascades

Click IVT or IWV image to see loop of GFS analyses

Valid 1200 UTC 26 January – 1200 UTC 2 February 2020






Summary provided by C. Castellano, C. Hecht, B. Kawzenuk, and F. M. Ralph; 3 February 2020