A front moving up NZ is expected to bring heavy rain and thunderstorms.
Heavy rain and thunderstorms are being forecast for New Zealand today.
A front crosses the remainder the South Island during today to approach the lower North Island at night, followed by cold upper level temperatures in the south.
The front brings a period of significant heavy rain to Fiordland and Westland today, for more information see the latest Severe Weather Watch, says the MetService.
There is a moderate risk of thunderstorms in Westland this afternoon associated with the front. These storms may be accompanied by heavy rain of 10-25mm per hour and small hail.
"There is a also a moderate risk of thunderstorms this afternoon and evening about inland Southland, central Otago and eastern areas of Otago and extending into the south of Canterbury this evening as indicated on the chart.
"These storms may be accompanied by localised heavy rain of 10 to 25mm per hour, hail 10 to 20mm in diameter and possibly a small tornado about eastern areas."
There is a low risk of thunderstorms affecting much of the remainder of the South Island as indicated on the chart.
Meanwhile, daytime heating and wind convergence over inland parts of the central North Island are expected to produce a few showers during the afternoon and evening.
"Some of these showers are likely to be heavy and there is a broad low risk of thunderstorms from Auckland and Coromandel Peninsula to Taihape, and across Bay of Plenty and Taupo to Gisborne, Hawke's Bay and the Tararua District.
"However about inland Waikato and Waitomo, about Taumarunui and western areas of the Bay of Plenty and Taupo the risk of thunderstorms is considered moderate.
"These thunderstorms may bring localised heavy rain of 10 to 25mm per hour and hail."