CW3E AR Update: 21 January 2020 Outlook

January 21, 2020

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Multiple landfalling ARs will bring heavy rainfall and mountain snowfall to the Pacific Northwest this week

  • A landfalling AR is forecast to impact Oregon and Washington during 22–24 Jan
  • Some areas along the coast may experience AR conditions for more than 48 hours
  • At least 3–7 inches of rainfall is expected over portions of western WA and northwestern OR during next 3 days, with 1–2 feet of snow possible in the North Cascades
  • A second AR is expected to bring additional precipitation to coastal OR and Northern CA on 25–26 Jan

Click IVT or IWV image to see loop of GFS analyses/forecasts

Valid 0000 UTC 22 January – 0000 UTC 27 January 2020






Summary provided by C. Castellano; 21 January 2020