A southwesterly airflow lies over New Zealand tomorrow, potentially becoming unstable during the afternoon for the eastern side of both islands.

For the upper North Island we can expect areas of cloud and the odd shower about, winds breezy from the west or southwest.

The lower North Island has similar weather in the west while out east showers push northwards during the day possibly heavy with thunderstorms and hail as southwesterly winds freshen. There may be some sun before showers move through. Showers moving through the Wairarapa from morning then further north in the afternoon.

Apart from an early clearing shower about the upper South Island expect sunny spells with light winds. Showers move into North Westland late afternoon. Showers move into Canterbury Banks Peninsula southwards mid afternoon onwards some of which may become heavy with thunderstorms and hail then clearing later in the evening or overnight.

For the lower South Island we see showers move into Fiordland during the morning then spreading elsewhere early afternoon. Showers may become heavy with thunderstorms and hail in the east. Most shower activity easing in the evening although a few showers linger through the night.

Not all regions and towns have been mentioned above. For specific 10 day information for your city, town, rural community or island please see the 1500 forecasts on our homepage!

– Aaron Wilkinson, WeatherWatch.co.nz