Kauai and Niihau are expected to experience tropical storm conditions starting Monday afternoon, with sustained winds of 35-55 mph (56-88 km/h) and higher gusts in elevated areas. Heavy rainfall could lead to significant flash flooding and mudslides, particularly in Kauai County and parts of Hawaii Island. Coastal flooding and inundation of low-lying areas are possible due to high surf coinciding with monthly high tides, with waves reaching up to 14 feet (4.3 meters) along south-facing shores. Offshore waters near the Northwestern Hawaiian Islands could see seas peaking at 19 feet (5.8 meters) and thunderstorms. Power outages are anticipated, and restoration may take several days depending on the extent of the damage.