CW3E AR Update: 5 December 2019 Outlook

December 5, 2019

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Another storm to bring AR conditions and heavy precipitation to the U.S. West Coast

  • A landfalling AR associated with a large cyclone will produce heavy rainfall and mountain snowfall in Northern CA and southwestern OR on 6–8 Dec
  • A second landfalling AR further south will likely bring AR conditions and lighter rainfall amounts to Southern CA on 7–8 Dec
  • Long-range ensemble forecasts continue to suggest a period of less active weather over California next week

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

Valid 1200 UTC 5 December – 1200 UTC 9 December 2019







Summary provided by C. Castellano, C. Hecht, B.Kawzenuk, J. Kalansky, F. M. Ralph; 5 December 2019