The storm is expected to bring moderate-to-heavy rainfall across California, with potential mountain snow in the Sierra Nevada. Urban areas like Los Angeles and San Diego may experience periods of heavy rain, posing risks of localized flooding. The Southwest and Great Basin regions will also see scattered showers and mountain snow as the system moves inland. Coastal areas are already experiencing tidal flooding, exacerbated by El Niño conditions, which could lead to further disruptions along the shoreline.