CW3E AR Update: 15 January 2020 Outlook

January 15, 2020

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A weak atmospheric river is forecast to make landfall over coastal Oregon today

  • The weak AR is predicted to bring AR 1 conditions to several locations along the Washington and Oregon coasts
  • The AR is forecast to weaken and propagate southward impacting Northern California Wednesday evening into Thursday
  • While the moisture content associated with this storm is forecast to be low, cold temperatures and low freezing level elevations are forecast to combine to bring as much as 3 feet of snow to locations in the Coastal and Sierra Nevada Mountains

GFS Forecast Valid:
1200 UTC 15 Jan – 0000 UTC 23 Jan 2020









Summary provided by C. Hecht, B. Kawzenuk, C. Castellano, & F. M. Ralph; 15 January 2020