The MetService has issued a Special Weather Advisory for much of the country.
Another exceptionally cold outbreak, like the one on late July (or worse) is on the way. It's expected to reach the lower North Island on Sunday night. There'll be bitterly cold south to southwest gales, and probably snow too. Monday won't be much better either.
It's pretty likely that the Rimutaka Hill Road will be closed, so I wouldn't book any meetings over the hill for Monday, and if you are planning any long journeys, you might want to chuck some water and food, and a sleeping bag into the car, just in case you get stuck.
You may want to take pity on the pets and not kick them out of the house that night, and if you're in our rural areas, you'll want to make sure that any new-born livestock are well looked after.
So rug up folks, and take care of yourselves this weekend!