Severe thunderstorm watch for top of North Island, heavy rain brings new flood threat
valid to 1 pm Sunday.
🟡 ⛈️A Severe Thunderstorm Watch has been issued for Northland from Dargaville to Whangarei north, valid from 1pm tonight to 1pm Sunday. https://t.co/qHyE5zzql5 https://t.co/GZIq9J48pw … pic.twitter.com/nS9Ig4fsO9
— MetService (@MetService) April 25, 2025
MetService meteorologist Sarah Haddon said warm, moist air is being pulled across the country over the next few days by a low-pressure system in the north Tasman Sea.
'The most action is expected over the upper North Island, with a heavy rain watch as well as severe thunderstorm watch currently in place for Northland until 1pm Sunday.
'There is also a moderate risk of thunderstorms, with a low risk of downpours, for Auckland all day tomorrow, and this risk continues more broadly for the upper North Island into Monday.'
Kia ora Aucklanders, @MetService have released their thunderstorm risk chart for Sunday 27 April. Please be sure to keep up with the latest weather information. https://t.co/XRNaweYya5
— Auckland Emergency Management (AEM) (@AucklandCDEM) April 26, 2025
The latest MetService thunderstorm risk suggests a moderate threat of thunderstorms in the far north of Northland, north of Kaitāia to Bay of Islands, as well as heavy rain with intensities of 10-25mm per hour.
There is a moderate risk of thunderstorms spreading south over Northland, reaching Dargaville to Whangārei around midnight. There is also a low risk of thunderstorms over Auckland and the northern Coromandel Peninsula.
Niwa also said 'uncertainty remains in the forecast' and there is the potential that the Far North District could receive moderate to heavy rainfall on Saturday and Sunday.
'A plume of moisture north of NZ will be the culprit. If it stays farther north, rainfall amounts will be lower,' Niwa said.
The top of the North Island was battered as Cyclone Tam slowly rolled over the country last week.
More than 20 Far North homes are still without power a week after the ex-tropical cyclone first struck the region.
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