The areas that could see particularly severe rainfall as the large plume of moisture heads toward land will likely stretch from the south of Portland, Oregon, to the north of the San Francisco area.
Observations From Members 
Explosive cyclogenesis
:quality(70)/cloudfront-us-east-1.images.arcpublishing.com/adn/YRANT3VWN34PUJAICFFMDRU25A.jpg){kind=link}