A large anticyclone to the southwest directs a cold southerly airflow over the South Island on Friday, this southerly airflow gradually pushes over the North Island during the day.
A mix of sun and cloud for the upper North Island on Friday, chance of a shower or two otherwise mainly dry, winds from the south. Showers about Wairarapa, becoming heavy in the afternoon then pushing northwards reaching Hawkes Bay in the evening. Some cloud for the lower western North Island, may be a shower in the afternoon as southeasterlies freshen.
Showers for the eastern South Island may be heavy in the morning then gradually easing, risk of a shower out west then cloud breaking away by evening.
By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz