The Pacific Northwest may face drier winters, reduced mountain snowpacks, and milder temperatures, potentially impacting water resources and winter recreation. California, on the other hand, could experience intensified atmospheric rivers, leading to flooding and infrastructure challenges. Emergency planners in California are particularly concerned about the possibility of record-breaking rainstorms. Additionally, warmer ocean temperatures off Mexico could increase the likelihood of tropical systems impacting Southern California, though such events remain rare. The broader U.S. may see more severe weather in southern states during winter, while global impacts could include droughts and flooding in other regions.