MetService heavy rain warnings are also in place for Bay of Plenty and Rotorua from 3am ‘till 8pm tomorrow, with 80 to 110mm expected. Tasman, northwest of Motueka in the South Island, is under a heavy rain warning over 24 hours from 6pm today, with 120mm to 150mm expected.
Taupō is under a heavy rain watch from 6am ‘till 9pm tomorrow and Mt Taranaki from 11pm tonight to 7pm tomorrow. It’ll also be wet in Fiordland and the Westland ranges until 4am tomorrow.
A road snowfall warning is in place for Milford Rd (SH94) until 2am, with 2cm to 4cm of snow expected near the Homer Tunnel, MetService said.
In Auckland, authorities were expecting “a band of messy weather” with rain from 8pm tonight until daylight Friday morning, easing through Friday morning and afternoon, Maggs said.
“We expect local flooding and water pooling, especially after any heavy falls of rain. These are most likely to be in the north and east of Auckland.”
Other precautions recommended included putting away loose items and checking gutters and drains.
If life or property was at risk at any time, call 111 but, otherwise, Auckland Council could be contacted on 09 301 0101 for reporting blocked drains and online via the council website’s “report a problem” link if trees have come down in public areas, he said.
Periods of heavy rain with possible thunderstorms are expected in Auckland overnight from 10pm to 5am, and from 3pm today to 11am tomorrow in Northland, MetService says.
“Heads up Auckland. Our expert forecasters have decided to issue a severe thunderstorm watch for potential downpours with the rain tonight,” they tweeted this afternoon.
“Some areas could see larger accumulations of rain than others and impacts are possible with the high-intensity rainfall.”
Localised downpours are also possible, MetService said in its watch.
“Between 10pm tonight and 5am [tomorrow], localised downpours of 25-40mm/h are possible in some parts of the Auckland region (including the islands of the Inner Hauraki Gulf). These downpours could occur with or without thunderstorms.”
Meanwhile, Northland driving conditions would be hazardous with surface flooding and poor visibility in heavy rain, MetService said.
“The thunderstorm and downpour risk initially starts in the Far North this afternoon, then spreads southwards to other parts of Northland this evening.”
Northland has a heavy rain watch in place until 11am tomorrow, with a moderate chance of an upgrade to a warning, MetService said.
“Thunderstorms and localised downpours are possible.”
There’s a low-pressure system to the west of the country, MetService meteorologist Mmathapelo Makgabutlane said.
“It is going to be bringing bands of rain over the next few days while it’s around.”
Aucklanders and Northlanders are being warned the wet weather could cause surface or flash flooding, especially in low-lying areas such as streams, rivers or valleys, and could also spark slips.
Auckland’s heavy rain watch, which also extends to Great Barrier Island and Coromandel Peninsula, is from 8pm today to 2pm tomorrow when periods of heavy rain may approach warning criteria, MetService said.
Thunderstorms and localised downpours are also possible, they said.
The rain should ease to showers in the afternoon, before easing in the evening, although thunderstorms and hail are possible until evening.
Despite the foul conditions, it’ll be mild for the time of year, with a high of 18C forecast in Auckland tomorrow, 3C above the June average. A high of 18C is forecast for Whangārei tomorrow.
“Northeasterlies [will be] turning southwesterly in the afternoon, fresh in the evening”, they said for Auckland.
The heavy rain and possible thunderstorms would also likely bring windy conditions, MetService meteorologist John Law said.
“Especially overnight, Thursday into Friday, into the northern areas.”
Cherie Howie is an Auckland-based reporter who joined the Herald in 2011. She has been a journalist for more than 20 years and specialises in general news and features.
