CW3E AR Update: 4 January Outlook

January 4, 2019

Click here for a pdf of this information.

Multiple ARs forecast impact the US West Coast over the next several days

An AR is currently impacting the Pacific Northwest, bringing heavy rain and strong winds
As much as 5 inches of precipitation has fallen over portions of the Pacific Northwest over the past 24 hours
Another system is forecast to develop along the cold front of the current AR, which will make landfall over Northern CA
As much as 9 inches of precipitation is forecast to fall over the higher elevations of Northern CA over the next 6 days
Forecast confidence in onset, duration, and magnitude of additional ARs (days 3+) is currently low

Click IVT or IWV image to see loop of 0-180 hour GFS forecasts Valid 1200 UTC 4 January – 0000 UTC 12 January 2019

Summary provided by C. Hecht, B. Kawzenuk, and F. M. Ralph; 1 PM PT 4 January 2019

Entry posted in: Atmospheric Rivers, CW3E AR Updates, Extreme Events
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