A northwesterly airflow lies over New Zealand today, sandwiched between a large low in the south Tasman Sea and an anticyclone to the northeast in the Pacific. The flow tilts more northerly on Tuesday then changing northwesterly and finally westerly later in the day as a series of fronts moves through.

May be a morning fog patch for some upper North Island regions this morning then expect cloudy areas and a few showers, especially in the east then clearing evening. Mainly sunny weather for the east coast. The West Coast of the South Island sees heavy rain, thunderstorms possible too. Mainly dry out east however Southland and perhaps Otago sees some rain morning and afternoon respectively.

As a front sweeps down over the upper North Island in the morning / early afternoon there may be isolated heavy falls and thunderstorms then easing. Mainly dry about the lower western North Island then areas of rain develop in the afternoon, a similar story for the east coast with some morning sun likely before clouding over with scattered rain after midday. Heavy rain for the South Island’s West Coast, mainly dry in the east with some high cloud although Nelson and Marlborough will likely see some rain.

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz