Weather: Snow on the way for some as 'unsettled southwesterly flow' moves across New Zealand

Weather: Snow on the way for some as 'unsettled southwesterly flow' moves across New Zealand
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A snowy change is on the way for the South Island with a drop to more wintry temperatures expected as a southwesterly flow moves in.

MetService is expecting to see snow as low as 300 metres to 400 metres in Southland and Otago on Monday afternoon.

As a result, there are a number of road snowfall warnings across the South Island. These are for Arthur's Pass, Porters Pass, Lindis Pass, Crown Range Road, Milford Road, and the Dunedin to Waitati Highway State Highway 1.

"A fittingly wintry feel to the weather this week - with snow, frosts and low temperatures," MetService tweeted.

"An unsettled southwesterly flow is expected across the country with a succession of fronts bringing a continuous influx of cold air from the south."

High-pressure is dominating New Zealand's weather at the moment, WeatherWatch said, and it's bringing fairly dry weather. Rainfall totals are highest in the southwest corner of the North Island with just 15 millimetres forecast over the next 24 hours.

As a series of fronts move north over the South Island on Monday, rain and showers can be expected in the west and far south.

While temperatures are warmer for Monday, with some regions several degrees higher than average, they will reset closer to normal for this time of year for most of the country by Tuesday.

In the meantime, it'll be fairly cold in Northland and over the South Island on Monday night, and Tuesday night will be even colder across New Zealand.