The storm systems pose risks of localized flooding, strong winds, and travel disruptions, particularly in mountainous regions. Coastal areas in Northern and Central California may experience heavy rainfall and ocean swells, while Southern California could see isolated thunderstorms and localized flooding. Arizona and other western states face risks of rain, thunderstorms, and mountain snow, with flooding concerns in areas with saturated ground. The interior West, including Nevada, Utah, and Idaho, may experience deteriorating travel conditions due to snow and reduced visibility.