A deep low continues to affect many southern and central areas of the country this morning, with rain set to continue before this afternoon.
It's November, but summer seems a long way off.
MetService reported peak wind gusts of 154km/h on Wellington Mt Kaukau overnight, and a maximum hourly rainfall of 33mm at Mt Taranaki.
About 20cm of snow fell at the Homer Tunnel in Fiordland - the country's heaviest fall.
Road snow warnings are currently in place for Cromwell and Te Anau/Lumsden, Lindis Pass, and chains are required in Central Otago.
Do you have any video or images of severe weather or flooding from overnight or this morning? Email news@tvnz.co.nz.
1 NEWS' Kaitlin Ruddock with the latest from the top of the South Island.
The New Zealand Transport Agency is urging people to delay travel if possible this morning, and asking West Coast motorists to drive only if essential due to heavy rain and gale-force winds.
Fire and Emergency New Zealand said they had received 14 weather-related callouts overnight, many in the Nelson region.
Power outages were reported overnight in parts of the South Island, including in Blenheim and Nelson.
Two inbound and two outbound flights from Nelson have been cancelled this morning, and flights to and from Christchurch have also been affected.
Transpower New Zealand apologised to affected customers at 3.37am, saying the severe weather was disrupting power.
"The weather is causing some issues for our assets, and power supply is currently affected across much of the top half of the South Island," they wrote.
"We are working to identify the fault and restore supply as quickly as possible."
Power was restored to many areas about 4.30am.
There are also reports of storm surges in Nelson causing the evacuation of people camping in low-lying areas.
FENZ urged people to be vigilant of rising waters as heavy rain hits.
The main rain front is due to pass over the North Island by late this afternoon.
For a full forecast, see our weather section here .
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