Locals are being asked to stay alert, as thunderstorms with heavy rain and hail are possible today.
MetService issued a severe thunderstorm watch for the Bay of Plenty west of Rotorua, Coromandel Peninsula, Waikato and Auckland from 2pm to 8pm.
There is a moderate risk this will happen.
This could cause localised downpours of 25 to 45 mm/h which could cause slips, surface and flash flooding, especially in low-lying areas with streams, rivers or narrow valleys.
Driving conditions will also be hazardous with surface flooding and poor visibility in heavy rain.