VIDEO: Another big low coming, more rain and squalls

More deep low pressure is about to influence NZ’s weather pattern this week bringing more rain, more wind and more squally showers off the Tasman Sea.

There may be a few isolated thunderstorms in the west and north later this week too as we transition from milder winds (that are about to develop) and the colder change on the way end of week.

NZ: Another big low coming this week, more rain coming too (+3 Maps)

NZ saw some big frosts over the past couple nights but now we're heading into a milder northerly flow for many places ahead of the next rain band and big low.

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Sunday's national forecast

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A colder change moves over the North Island while a large high expands over the South Island and into the North Island. This will help clear rain and showers away from northern NZ as the day goes on.

The high also means much colder nights with some of the heaviest frosts of the year tonight in some South Island regions.

Heavy frosts this weekend for some, colder Sunday for many regions

Heavy frosts down to -8C are in the forecast with potentially some of the heaviest of the year tonight and tomorrow night thanks to a cold southerly followed by a large high.

The big high will lock in the cold air tonight over the South Island then much of the country on Sunday night.

Cold southerly to snake its way up NZ this weekend (+3 Maps)

A few low level snow flurries in the forecast for the lower South Island today is a reminder we have cold change moving up NZ this weekend.

No video today, so instead we have 9 Weather Maps!

Another cold front is coming with rain and snow. While fairly dry conditions remain over the North Island today the next area of rain starts to affect the western South Island. The westerly flow brings moderate to heavy rain/mountain snow and helps lift temperatures in the east for a time.

Polar southerly coming in again this weekend, snow to low levels for a time (+5 Maps)

Today and Friday are warmer than average in a number of regions but it's ahead of another polar change arriving Friday night in Southland and spreading up the South Island over Saturday.

Later on Saturday it moves into the North Island with a cold Sunday on the way for some areas, especially those in the east.

More rain and snow coming - 3 Day Accumulation Maps (x2)

Make the most of the dry weather today because the rain clouds are building up again. Rain returns to the West Coast on Friday and spreads into Southland later with a cold southerly.

VIDEO: Your Weekend outlook and a look at next week’s weather

We have some warmer weather on the way but it’s ahead of a cold Saturday southerly moving up the South Island while a low pressure system forms around the country this weekend too.