Heavy rain and thunderstorms could be in store for Northland tonight from a deep low weather pattern heading across the Tasman Sea.
In a warning issued this morning the MetService said a deep low and associated front over the Tasman Sea are forecast to approach New Zealand tonight. The front is expected to cross the country overnight and tomorrow. The low should then cross central New Zealand during Thursday morning.
This weather system is forecast to bring heavy rain to northern and western parts of both islands. The heaviest falls are expected about the eastern hills of Northland where up to 90mm is possible, and also northwest Nelson where 100 to 140mm is likely about the ranges.
People in these areas are advised to look out for rapidly rising rivers and streams and also possible slips and surface flooding. Many other northern and western areas could also see significant rainfall.
For Northland rain is forecast to become heavy tonight and easing late Wednesday morning with thunderstorms possible for a time.
In the 12 hours from 9pm tonight to 9am tomorrow we can expect 60 to 90mm of rain. Peak intensities of 20 to 30mm per hour are possible for a time early Wednesday morning especially with any thunderstorms.
For the latest weather information see www.metservice.com