An active cold front moving across the upper North Island today brings with it a moderate risk of thunderstorms for Auckland and Northland this morning and the Bay of Plenty this afternoon.
MetService said coastal locations could be at risk of a weak tornado, as wind gusts reach up to 90 kilometres per hour.
Heavy rain is expected around the country for most of the day as a broad low trough of pressure moves eastwards across New Zealand.
A severe weather warning has been issued for the Westland ranges, with 90 to 120 millilitres of rain expected which could cause rivers and streams to rise.
Powerco said a tree brought down a power line in New Plymouth this morning, causing outages for 100 customers, but this has since been restored.
Heavy rain warnings for Mount Taranaki have been lifted with rain easing.
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