Heavy showers and localized thunderstorms may affect the Big Island and Maui County, particularly on windward sides, with potential spillover onto leeward areas. Rainfall rates of up to 0.50 inches per hour have been observed, posing a risk of localized flooding in vulnerable areas. Marginal instability could lead to isolated thunderstorms, especially over the Big Island's interior. By Friday, conditions are expected to improve, with reduced humidity and lighter trade winds. Residents should remain alert for changing weather conditions and potential hazards associated with heavy rainfall.