Heavy rain in Waikato and Bay of Plenty eased overnight but several roads and highways remain closed today.
A further deluge is expected in parts of the North Island today
Torrential caused flash flooding and slips, and closed roads yesterday, forcing the closure of roads and state highways on the Coromandel Peninsula, Waikato and Bay of Plenty.
Floodgates were shut to prevent the Ohinemuri River inundating Paeroa.
Authorities in the Waikato and Coromandel monitored river levels warned farmers to move stock to higher ground if necessary.
While the downpour eased overnight a severe weather warning is in place for Gisborne, where 100-130mm of rain has fallen.
Periods of heavy rain were also likely in Hawkes Bay, Wairarapa and Wellington, the MetService said.
Several roads and highways remain affected by the downpour.
State Highway 25 between Thames and Whitianga is closed due to a large slip.
State Highway 26 at Te Aroha Road is closed because of flooding, preventing any access between Paeroa and Te Aroha, and floodgates remain up at Criterion Bridge.
State Highway 2 at Karangahake Gorge remains closed because the Ohinemuri River causing flooding.
One lane of the road between Tauranga and Waihi reopened last night after a slip closed State Highway 2 at Athenree Gorge, 48km northwest of Tauranga, for most of the afternoon.
State Highway 3 at Manawatu Gorge Rd is closed in both directions.
The Waikato and Bay of Plenty regional councils said there was potential for flood plains to be inundated, causing general surface flooding and disrupting transport.
WeatherWatch.co.nz said the large subtropical low bringing the wet weather would cross the upper North Island over the next day or two as it slowly fizzled out.
It would be followed by a large high that would bring sunnier and drier weather, with conditions improving in most places tomorrow and on Thursday.
A ridge which was lying across most of the South Island, which would would bring largely fine weather to areas south of Canterbury, the MetService said.
Meanwhile, in Auckland this morning heavy fog is causing disruptions to flights.
Auckland Airport spokesperson Richard Llewellyn said 13 flights had so far been delayed and four had been cancelled.
All the flights were domestic regional services.
International flights were re not affected.
Passengers were advised to check with their airline or airport website for flight updates.
