A polar air mass moving up the country is forecast to bring cold temperatures and snow across the South Island, while heavy rain and wind stick around for the North Island.
MetService meteorologist Josh Griffin said there had been an active rain trough moving across the top of the North Island this weekend and was expected to spread across the top of the South Island today.
“In conjunction with that, starting tonight, we’re going to have a cold front moving onto the far south of the South Island which will be spreading northwards today,” he said.
“As that cold front moves northward it will meet with the warm northwesterly air moving down.”
“We are also going to potentially see some strong wind gusts with some of the heavier showers and thunderstorms,” he said.
“But heading into Monday, it looks like it will be rainy before dawn but ease off during the day.”
Heading to Monday, Griffin said there would be another cold westerly flow heading onto the South Island.
“In places like Central Otago, Southland, Clutha and Fiordland, there will be frequent showers and some of the showers could have the potential to generate heavy snow around 400 metres,” he said.
“Temperatures were forecast to reach single digits in places such as Invercargill and Southland.
“The warm moist air that brought heavy rain to the top of the North Island came from the tropics while the cold fronts came directly from Antarctica.”