Thunderstorms are expected in parts of the North Island into the evening, while multiple slips are causing delays in places along the highways in Hawke’s Bay and Tairāwhiti due to heavy rain last night.
According to MetService, a severe thunderstorm is in effect in Taumarunui, Taranaki, Taihape, Whanganui, Manawatu until 9pm.
Thunderstorms have developed over central parts of the North Island. There is a risk that some thunderstorms could develop this afternoon and tonight, partly because they are moving very slowly. ^PL https://t.co/uNFdxCJarx
— MetService (@MetService) September 23, 2022
There is also a moderate risk of isolated afternoon thunderstorms over Northland and northern/eastern parts of Auckland, which can cause heavy rain locally at 10-25mm/hr and hail.
There is also a low risk of a small tornado or funnel cloud over eastern Northland, MetService said.
Waka Kotahi said his crews were clearing slips all the way between Central Hawke’s Bay and the Eastern Cape.
Road damage in Central Hawke’s Bay left some people isolated and unable to leave their homes.
The district has already had its wettest winter in recent history, with some coastal areas receiving nearly 100 millimeters of rain overnight.
Hawke’s Bay Regional Council said the problems caused by flooding were increasing by the hour.
The municipality has to discharge wastewater into the river to prevent it from overflowing and fears a boiling water warning for the city of Waipukurau is imminent.
Between Napier and Wairoa there are ramps at Devil’s Elbow, Tangoio and the Mohaka Viaduct.
There are also several slips on the Napier-Taupō Road.
Further north in Gisborne there are slopes in four places – Okitu Hill, Hicks Bay, Makorori and the Loisel Gorge.
Waka Kotahi advises drivers to exercise caution and expect delays when traveling on state highways in the area.