Temps down to -32*C over the north island in the next 12 hours or so.
Thunderstorm Risk mainly over the west coast of the north Island with hail, but heavy showersand possible hail more inland.
Metservice wrote:A front over the Tasman Sea is expected to move onto the west of central and northern New Zealand Island this evening and tonight, and conditions are expected to gradually become more unstable from this afternoon about western areas from Northland down to Buller.
In western areas of Auckland, Waikato, Waitomo, Taranaki, western Nelson and Buller, there is a moderate risk of isolated thunderstorms this evening and tonight. These thunderstorms if they occur have the potential to bring localised heavy rain of 10 to 20mm/hr, small hail and strong winds gusting 90 km/h.
Additionally in the North Island, there is a lower of risk of thunderstorms extending a little further east from Northland down to Manawatu, as indicated on the chart.
No other areas of significant convection or thunderstorms are expected.