Issued at 3:33pm 13/10/2026

Valid from 3:33pm 13/10/2026 to 1:00am 14/10/2026

A front preceded by a northwest flow moves northwards over southern New Zealand today, followed by a narrow ridge. There is a moderate risk of thunderstorms about Fiordland this afternoon. Any thunderstorms that occur will likely be accompanied by heavy rain with intensities of 10 to 20 mm/h. There is a low risk of thunderstorms about Westland from the glaciers southwards this afternoon, while for Stewart Island, Southland, and parts of Otago, there is a low risk of thunderstorms this afternoon and/or evening, mainly with the southerly wind change, as indicated on the chart. Lastly, daytime heating and wind convergences are expected to cause showers to develop about eastern parts of Northland this afternoon and early evening, and there is a low risk of thunderstorms as depicted on the chart. There is minimal risk of thunderstorms or significant convection elsewhere during this period.

Issued at 9:35am 13/10/2026

Valid from 1:00am 14/10/2026 to 1:00pm 14/10/2026

There is minimal risk of thunderstorms or significant convection during this period.

Issued at 7:47pm 13/10/2026

Valid from 1:00pm 14/10/2026 to 1:00am 15/10/2026

A trough of low pressure covers southern New Zealand during the latter half of Wednesday, with cool temperatures aloft making the atmosphere unstable there. There is a low risk of thunderstorms for parts of Southland and Otago during the afternoon, as drawn on the chart. There is minimal risk of thunderstorms or significant convection elsewhere during this period.