Weather: Risk of thunderstorms for Auckland, Northland, as watches issued

MetService has issued thunderstorm and heavy rain watches for Auckland, Northland, and other parts of the North Island. The weather system is expected to bring humid conditions and potential flash flooding through Tuesday.
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Provides critical public safety information regarding severe weather risks and potential infrastructure impacts.
There is a moderate risk of severe thunderstorms with localised downpours for Auckland, Great Barrier Island and Northland today. Photo / Cameron Pitney.
Thunderstorm watches have been issued for the top of the country, with downpours of 25-40mm per hour possible.
Northland’s watch is underway and lasts until 9pm today, while one for Auckland and Great Barrier Island was for 11am-9pm.
MetService said the watches carry a moderate risk of severe thunderstorms with localised downpours of up to 40mm/h.
“Rainfall of this intensity can cause surface and/or flash flooding, especially about low-lying areas such as streams, rivers or narrow valleys, and may also lead to slips.”
Driving conditions will also be hazardous with surface flooding and poor visibility in heavy rain, MetService said.
Heavy rain watches for Northland, Auckland, Great Barrier Island, Waikato, Waitomo, Taupo, Taranaki, Taumarunui and Tongariro National Park kick in from 9pm, lasting until 1am Wednesday.
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