"Winds up to 120km are expected so any loose objects are certain to become airborne," he said.
Trampolines, outdoor furniture and other heavy items should be securely fixed to the ground.
"Falling branches and toppling trees are other hazards in weather events like these so downed lines must be treated as live at all times. Stay well clear and call Powerco on 0800 272727 for emergencies such as trees in power lines or lines down," he said.
Temperatures are forecast to plummet as the cold, southerly blast sweeps through.
"There is a chance of snow in the Central Plateau region so customers there should be ready to cope with that as well," he said.