A low pressure system west of the South Island in the Tasman Sea and a high centre to the southeast drags in an easterly quarter airflow over most of the country on Tuesday.

Dry for most of the North Island on Tuesday, in the afternoon showers develop about inland areas, some may become heavy with thunderstorms then easing later in the evening. Some rain spreads into the east coast later in the evening / overnight.

A mostly cloudy day for a fair amount of the South Island, expect areas of patchy rain or showers, just Fiordland and Southland stay mainly dry.

By Weather Analyst Aaron Wilkinson – WeatherWatch.co.nz