NZTA urges motorists to prepare as cold conditions threaten travel.
A significant winter storm will hit the South Island as the week progresses, MetService says.
MetService warns of heavy rain and severe gales as a front moves up the country.
Heavy rain is expected to hit southern regions over the weekend.
A number of warnings and watches are in place today.
A 36-hour heavy rain watch is in place as a significant winter storm bears down.
Heavy rain and snow are forecast as a low-pressure system reaches New Zealand.