A front slowly moves northwards over the South Island during the day on Wednesday, reaching the lower North Island in the evening.
Expect heavy rain on the West Coast of the South Island, while there’s a chance of thunderstorms here also.
High cloud above in the east of the island, with strong to gale northerly winds blowing through.
Some spillover rain is possible at times in the east also, especially with the passing of the front.
Northerly winds through Cook Strait are likely to reach gale, as well as across western parts of the North Island during the evening and overnight.
The East Coast of the North Island sees strong northerlies develop overnight also, with a risk of gales by dawn on Thursday.
Rain spreads onto the west of the North Island – Taranaki southwards – in the evening, then elsewhere overnight. Rain in the west of the North Island may contain heavy falls.
– Aaron Wilkinson & Drew Chappell, WeatherWatch.co.nz