MetService - Thunderstorm Outlook
Valid to: Midnight Wednesday 19 Aug 2015
Issued at: 9:17am Wednesday 19 Aug 2015
An active front lying just to the west of the North Island this morning, is expected to move across the North Island to clear East Cape by early evening. At midday the front is expected to lie from central Northland to just west of Auckland City to the Kapiti Coast and by 6pm from north to south over the Hicks Bay area.
There is a moderate risk of thunderstorms with the front over north Taranaki,Waitomo, in the west and north of Waikato, Auckland, Northland much of the Coromandel Peninsula, Bay of Plenty and northern Gisborne with the timing as above. This feature has the potential to produce locally heavy rain of 10-20mm/hr, hail of 5-15mm, wind gusts of 90-100km/hr and small tornadoes,especially in coastal areas.
Over the rest of the North Island, there is a general low risk of thunderstorms as the front moves over.
In the South Island, another active cold front is expected to move from southern Fiordland from about mid afternoon to lie over northern Westland by midnight.There is a moderate risk of thunderstorms with this front this afternoon and evening over Westland, Fiordland and about the Foveaux Strait area. These may support locally heavy rain, hail and wind gusts to 100km/hr.
Elsewhere, no thunderstorms or significant convection expected.
MetService T-storm Outlook map for Aug 19.png