"Conditions are worsening. There's a band of rain going to move through in the next hour or so," he said just after 12.30pm.
"The winds will be picking up. It's a brisk southwesterly going through at the moment. There is a wind watch for Auckland and Northland for this evening and the winds are picking up before that.
"We're seeing gusts now of 65km/h at the airport. They will pick up through the evening.
"There will be some pretty sharp showers over the next couple of hours, and some more after that."
The temperature was 10C in Auckland, which was the predicted high for the day.
And although 10C can feel pretty nippy, especially in a wind, it's too warm for snow or even sleet.
"That was never suggested for Auckland," Adams said.