"Over the last 72 hours there has been an accelerated and significant snowfall on Mt Ruapehu.
"Both ski areas are wearing their new white winter coats with pride. We've hit the sweet spot in terms of snow levels and with the fantastic forecasted conditions this weekend, now is prime time for skiers and riders to come enjoy the fresh snow."
The whole mountain would be opening this weekend.
MetService said all the ski fields were having the same fortune.
"We've had a southwesterly flow over the last couple of days, which has been great news for the Central Otago ski fields down towards Cadrona - they've had some really good snow over the last couple of days," MetService meteorologist John Law said.
While there would not be much more snow over the weekend, the weather would improve, which would make for pleasant skiing, he said.
"Keep an eye on the winds, especially first thing Saturday morning, they might just take some time to ease off, but...Saturday and Sunday look like cracking days on the mountain."
WeatherWatch.co.nz head analyst Philip Duncan said the ski season was finally underway after a warm start to winter.
"Even though we've got an early spring, it's bringing snow storms with it."
Some North Island ski fields should see some snow flurries tomorrow morning, but they would clear, he said.
Meanwhile snow closed the Desert Road today from Taihape to Rangipo and also the main detour from Ohakune to Waiouru.
Snow showers over night and early this morning had dusted the Rimutaka Hills, however the road remains open.
