Angus Hines, a meteorologist at the bureau, said some “major weather hazards” were possible as Narelle made landfall, with maximum wind gusts expected to exceed 250 kilometers per hour — just over 155 miles per hour. That would make the storm a Category 5 cyclone, according to the bureau’s five-point system, which is equivalent to a Category 4 hurricane on the Saffir-Simpson scale that governs North American storms.