A low is slow-moving northwest of Cape Reinga. An associated front is expected to sweep down over the top of the North Island today and tomorrow. A strong northeast airstream ahead of this front is expected to bring a period of heavy rain to the northeast of the North Island. The heaviest falls are expected over eastern parts of Northland today and overnight tonight, and for the Coromandel Peninsula and Bay of Plenty west of Whakatane, where as much as 160mm may fall in places by Monday night.

People in these areas are advised to watch out for surface flooding, slips and rapidly rising streams and rivers.