Waikato Regional Council says Metservice has now issued a formal severe weather warning for the eastern Waikato ranges.
It means between 80 and 120 millimetres of rain could fall on the Kaimai Ranges from tonight till tomorrow afternoon, placing further pressure on already swollen rivers.
The rain could send the Piako and Waitoa rivers back up to levels seen earlier last week, while the Waihou could also come under pressure. However, no problems were expected for the Ohinemuri and Kauaeranga rivers at this stage.
Emergency management officer Greg Ryan said that forecasting suggested the river systems and the council’s flood management infrastructure should be able to cope with any new downpours.
“But farmers and the general public need to be aware of the potential for rising river levels, slips and difficult road conditions.”
There was also a severe weather watch advisory for the Coromandel indicating the possibility of further heavy rain there today and tomorrow, but not at levels justifying a warning.
Rainfall and river level data is available at www.waikatoregion.govt.nz.