A low pressure system centred over the North Island and a large high in the Tasman Sea directs in a cool southerly airflow over New Zealand today.
Rain moves into the upper North Island early this morning, possibly heavy then easing to showers around midday. Showers may become heavy late afternoon / evening in the west with a chance of thunder then easing overnight. Showers for the lower western North Island, possibly heavy from afternoon then easing this evening.
Early rain eases to showers for Wairarapa, rain moves into Hawkes Bay this morning then Gisborne around midday before easing to showers this afternoon, winds from the south.
Rain or showers for Canterbury, Marlborough and Nelson easing this afternoon becoming patchy by evening with long dry spells developing. South Canterbury may have a mainly dry day after any early showers clear. The odd light shower possible from afternoon about Southland then clearing by evening.
Image: Monday 14th January 2019 4:00pm MSLP / Rain map – weathermap.co.nz