MetService warns thunderstorms could bring gusts up to 100km/h.

A raft of severe weather warnings and watches are in place for the West Coast and top of the South Island, and for much of the upper North Island.

MetService says heavy rain, thunderstorms and strong winds will push across much of New Zealand from Thursday, with Taranaki at risk of warning-level falls.

MetService warns thunderstorms could bring gusts up to 100km/h.

Orange heavy rain alerts are active for Taranaki and eastern Bay of Plenty.

A severe thunderstorm watch is in place for the top half of the North Island.

Temperatures will drop to seasonal averages after what has been a warm start to winter.

Temperatures will drop to seasonal averages after what has been a warm start to winter.

There is still a chance of heavy showers but the general trend is an easing of the rain that slammed into the country in the past two days.