The top of the North Island looks set for a drenching to finish off the week, forecasters say.
On Thursday a front from the South Island will move northwards, followed by a cooler southerly flow that will spark a quickly forming low pressure system over Auckland and Northland, WeatherWatch.co.nz head analyst Philip Duncan said.
The system should prompt a band of rain stretching from the west to the east.
"To the north, around northern Northland we'll have sub-tropical northerlies.
"To the south, around Waikato and beyond, we'll have cooler southern ocean air," he said.
