Issued at 8:29am 7/11/2026
Valid from 8:29am 7/11/2026 to 1:00am 8/11/2026
A warm and humid airmass covers the country, with embedded fronts and troughs bringing periods of rain or showers to many places. Daytime heating and wind convergence is also expected to cause showers to develop in inland areas. Localised downpours are possible over much of northern and central New Zealand, and Severe Thunderstorm Watches are in place. For all of the North Island there is at least a low risk of thunderstorms all day. For Great Barrier Island and Northland south of Whangarei there is a moderate risk of thunderstorms until late afternoon. Any thunderstorms that occur will likely be accompanied by heavy rain with intensities of 10 to 25 mm/h and small hail. For Auckland and Coromandel Peninsula southwards to Bay of Plenty and across the central high country to Taranaki, there is a moderate risk of thunderstorms until late evening. Thunderstorms here are expected to be accompanied by small hail and heavy rain with intensities of 10 to 25 mm/h. There is also a moderate risk of severe thunderstorms occurring in this area until early evening, which could bring localised downpours of 25 to 40 mm/h. A low risk of downpours lasts late into the evening, as depicted on the chart. For Whanganui southwards to northern and eastern parts of Wellington, also about the Tararua District and Wairarapa, there is a moderate risk of thunderstorms this afternoon and evening. Thunderstorms here are expected to be accompanied by heavy rain with intensities of 10 to 25 mm/h. There is also a moderate risk of severe thunderstorms occurring in these regions this afternoon, which could bring localised downpours of 25 to 40 mm/h. A low risk of downpours lasts into the evening, as shown on the chart. For much of the South Island there is low risk of thunderstorms all day, as shown on the chart. However, the risk of thunderstorms about many inland areas is considered moderate this afternoon and evening, as drawn. Thunderstorms are expected to be accompanied by heavy rain with intensities of 10 to 25 mm/h. There is also a moderate risk of severe thunderstorms occurring north of Tekapo this afternoon, which could bring localised downpours of 25 to 40 mm/h. A low risk of downpours lasts into the evening for this area, as shown on the chart. There is minimal risk of thunderstorms or significant convection elsewhere in New Zealand today.

In New Zealand, MetService classifies a thunderstorm as severe if one or more of the following criteria are met:
Rainfall of 25mm/h, or more.
Hailstones 20mm in diameter, or larger.
Gusts of 110km/h (60 knots) or stronger.
Fujita F1 - i.e. wind speeds greater than 116km/h (63 knots) or stronger.
Note: some tornadic systems such as funnel clouds, waterspouts and small land-based tornadoes are possible with thunderstorms that may not be classified as severe.