Earlier, just after 9am, emergency services were called to a crash involving a truck on the State Highway 1 northern motorway, just after the on-ramp from Upper Harbour Highway.
People were told to expect delays as authorities worked to clear the area. It was cleared by 10.05am, road authorities said.
Earlier, just after 7.30am, a crash involving two cars blocked the right lane near the Lambie Drive off-ramp, heading northbound.
Cameras showed two people near the motorway barrier as one of the cars could be seen up against the other vehicle.
Road authorities are also warning and urging motorists to drive to the conditions, as bad weather hits the City of Sails today.
"Please take extra care. As weather conditions worsen today, please remember to slow down, keep your lights on and maintain a safe following distance," the NZTA said.
The MetService says Aucklanders can expect overcast skies and a few showers turning into periods of heavy rain later this morning.
There is also a risk of thunderstorms, the authority said.
