New Zealand Snow Forecast: 20 cm More through Sunday

Snowfall forecast map — Credit: NOAA/NCEP GFS

This New Zealand snow forecast brings another 11-17 cm to upper Ruapehu and 7-11 cm to Canterbury as the ongoing storm winds down through Sunday morning. Saturday operations begin mixed: Tūroa and Whakapapa are closed for the storm, Mt. Hutt is on hold, and Mount Dobson’s latest report remains closed, while Porters, Ohau, and the Queenstown-Wānaka resorts are operating. A quieter start to next week should improve operating reliability, followed by a potentially useful but much less certain storm from late Wednesday into the weekend.

The models converge on the storm tapering across the South Island during Saturday and holding residual snow over Ruapehu into Sunday morning. They also agree that snow levels remain below every resort base, but diverge on intensity: most give Ruapehu the larger remainder, while South Island outcomes range from flurries in Queenstown-Wānaka to several centimetres in Canterbury and Mackenzie. Snow ratios run about 10-12:1 on Ruapehu, favoring moderately dense snow, and 14-16:1 farther south, favoring lighter, fluffier snow. Available wind guidance converges on continued exposed-ridge disruption over Ruapehu Saturday before easing. Confidence is highest from Saturday morning through Sunday noon, the period covered by the totals below.

Monday and Tuesday look predominantly dry, with the models closely aligned on a cold Monday followed by modest warming Tuesday. South Island resort elevations should generally bottom out between -4 C and -2 C Monday, with daytime readings near 0 C to 2 C; Tuesday trends closer to 1 C to 4 C. Ruapehu stays colder and breezier, while most South Island winds become light enough for a more settled ski period. This favors preservation of the weekend refresh on Monday, then firmer morning surfaces and modest daytime softening Tuesday where sun reaches the snow. Timing, temperature, and South Island wind agreement are strong, though the Ruapehu wind range remains wider.

From late Wednesday into Saturday, a new frontal system could bring a conservative 5-20 cm to many resorts, with localized 20-40 cm possibilities around Canterbury and Ruapehu. The models converge on the broad midweek arrival but diverge by roughly a day on the strongest pulse and sharply on snowfall distribution. Snow levels may begin near or above lower slopes before dropping below resort bases, so early snow could be denser before improving. Wind solutions agree on potentially disruptive northwest flow ahead of the front, then diverge on how quickly it eases. Sunday into early Tuesday is more speculative, with some solutions reloading Canterbury and Ruapehu while others produce only light snow.