The violent weather forecast for north Auckland suburbs and Northland is expected to bring heavy rain with hail measuring up to 2cm.
The MetService is warning lightning and thunder is likely to strike Auckland, Coromandel Peninsula and Northland this morning. After lunch parts of the Waikato and Waitomo may be hit as well.
According to latest thunderstorm outlook there was a moderate risk of thunderstorms lashing much of Northland, the northern parts of Auckland and eastern Waikato and Waitomo this afternoon and evening.
There is no threat of storms anywhere else in the country.
Yesterday the north was rocked by potentially deadly cloud-to-ground lightning strikes from Whangarei to Waikato.
People were warned to stay inside and keep off the water as more than 600 bolts relentlessly rained down. Parts of Auckland were deluged by hail storms and driving rain that left a set of shops in Takanini awash.
The MetService said a volatile cocktail of cold air at upper levels combining with relatively warm sea surfaces temperatures was behind the unstable conditions turning into thunderstorms.