Hurricane Lowell poses significant risks to Hawaii, including heavy rainfall, flash flooding, and mudslides, especially in steep terrain. Kauaʻi and Hawaiʻi Island could see rainfall totals of 76–152 mm (3–6 inches), with localized amounts exceeding 254 mm (10 inches). Maui may receive 51–102 mm (2–4 inches), while other islands could see 25–51 mm (1–2 inches). Life-threatening surf and rip currents are expected, with south-facing surf on Kauaʻi and Oʻahu forecast at 2.4–3.7 m (8–12 feet). Swells may produce extra-large surf above warning thresholds early next week, compounded by high tides.