CW3E AR Update: 2 April Outlook

April 2, 2019

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Multiple Atmospheric Rivers Forecast to Impact Northern California, Oregon and Washington Later this Week

  • The GFS is currently forecasting two weak and successive ARs to make landfall between 05 and 08 April 2019
  • There is currently large uncertainty in the overall onset, magnitude, and duration of both ARs
  • Precipitation forecasts currently suggest as much as 9 inches of precipitation over the Coastal Mountains of Northern California and Oregon
  • Freezing levels are currently forecast to remain above 5,000 feet over the Northern Sierra Nevada Mountains, which could lead to rain falling on the currently large snowpack and increased runoff associated with these events

Click IVT or IWV image to see loop of 0-180 hour GFS forecasts

Valid 1200 UTC 2 April – 0000 UTC 10 April 2019







Summary provided by C. Hecht, B.Kawzenuk, J. Kalansky, F. M. Ralph; 3 PM PT 2 April 2019