An outdoors expert says the avalanche at Wanaka's Treble Cone yesterday is a perfect reminder of how unpredictable snow can be.
The level two avalanche was caused by a group of experienced skiers who had ventured into an out-of-bounds area.
Chief executive of the New Zealand Mountain Safety Council Mike Daisely says the slip was minor, but it could've easily killed someone.
"A level one, or a grade one is at a level and grade two is 10 times higher than that. A grade three, which we had down at the Remarkables last week is 10 times bigger than that."
Mr Daisely says the group did everything right after the avalanche by alerting authorities, and snow bunnies should always look at the forecast prior to heading out, as even a small one can be deadly.
"They're a pretty nasty thing if you actually get caught in one."