Weather Warnings
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Thunderstorm Outlook

Valid to Midnight Thursday 21 Feb 2019
Issued at 12:30pm Thursday 21 Feb 2019

Updated at 12:30pm to add a low risk of thunderstorms about the Taranaki Bight from this afternoon to tonight associated with a slow moving trough.

A slow moving front is forecast to lie over northern Fiordland and Westland today, bringing further rain with heavy falls as detailed in the latest Severe Weather Watch. There is also a moderate risk of thunderstorms embedded within this rainband over northern Fiordland and southern Westland from this morning to late afternoon and about central Westland from this afternoon to tonight. Any thunderstorms that eventuate are expected to produce localised heavy rain of 10 to 25mm per hour or possibly more about the ranges. There is a broader low risk of thunderstorms over other parts of Fiordland, the remainder of Westland, southern Buller and about the Southern Alps as indicated on the chart.

There is also a low risk of thunderstorms about Clutha and Dunedin this afternoon and early evening associated with a southerly wind change and about southern Fiordland and Stewart Island late in the day as another front moves onto the area.

Humid conditions together with daytime heating and wind convergences are expected to produce scattered showers over inland parts of the central North Island this afternoon and evening, with a broad low risk of thunderstorms from southern Waikato and Taupo down to inland parts of Taranaki, Whanganui, northern Manawatu and the Tararua District, including Taihape and Hawkes Bay. However, this risk of thunderstorms is considered moderate from the Central Plateau down to inland parts of Central Hawkes Bay and northern parts of the Tararua District this afternoon and early evening, as indicated on the chart. Any thunderstorms that develop here are expected to produce localised heavy rain of 10 to 25mm per hour or possibly more.

No thunderstorms or significant convection expected elsewhere today.

Valid to Noon Friday 22 Feb 2019
Issued at 8:42pm Thursday 21 Feb 2019

Chart reviewed at 8:40pm Thursday and no changes made.

A series of weakening fronts are forecast to cross southern and western parts of the South Island during Friday morning, bringing some heavy falls to parts of Fiordland and Westland before dawn, as detailed in the latest Severe Weather Watch. There is also a moderate risk of thunderstorms about central parts of Westland before dawn, with a broader low risk other western and southern parts of the South Island, as indicated on the chart. Any thunderstorms that eventuate over central Westland could produce localised heavy rain of 10 to 25mm per hour or possibly more about the ranges.

A trough is forecast to lie slow moving between Taranaki and the Kapiti Coast, bringing some heavy showers or rain to these areas with a low risk of thunderstorms, as indicated on the chart.

Finally, a low and warm front are expected to approach the far north of Northland towards midday, bringing rain to the area and a low risk of thunderstorms.

No thunderstorms or significant convection expected elsewhere.

Valid to Midnight Friday 22 Feb 2019
Issued at 8:43pm Thursday 21 Feb 2019

Chart reviewed at 8:40pm Thursday and no changes made.

The trough mentioned above is forecast to remain slow moving between Taranaki and the Kapiti Coast during Friday afternoon and evening, bringing some heavy showers or rain to these areas with a low risk of thunderstorms, as indicated on the chart.

Meanwhile, a low and warm front are forecast to cross the northern North Island during Friday afternoon and evening, bringing some heavy falls to Northland and northern Auckland, including Great Barrier Island, with a low risk of embedded thunderstorms, and a Severe Weather Warning and Watch has been issued for these areas.

No thunderstorms or significant convection expected elsewhere.