Updated 6:37am — There’s thick fog across parts of the North Island this morning thanks to a large high pressure system.

With fog patches around driving may be extremely hazardous at times on some North Island State Highways.

Please drive with extreme care.

Some flights may also be impacted this morning – please check with airline and airport websites for flight confirmations.

A nor’east breeze developing today should help clear the fog patches.

The areas in peach colour (below) have fog or low cloud.

– 6am hour / JMA

– WeatherWatch.co.nz