CW3E AR Update: 4-10 January 2017 Outlook

January 4, 2017

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Strong AR forecast to impact California this weekend

  • A strong AR with IVT as high as 1000 kg m-1 s-1 is forecast make landfall over the West Coast this Weekend
  • Precipitation from an AR currently impacting CA combined with the precipitation from AR this weekend are producing 7-day precipitation forecasts as high as 20 inches in the higher elevations of the Sierra Nevada Mts.
  • The hydrologic impacts associated with an event of this magnitude could be numerous and several rivers are already forecast to rise above flood stage in portions of northern/central California and western Nevada

Click IVT or IWV image to see loop of 0-138 hour GFS forecast

Valid 1200 UTC 4 Jan – 0600 UTC 10 Jan 2017








Summary provided by C. Hecht, B. Kawzenuk, and F.M. Ralph; 3 PM PT Wed 4 Jan. 2017