Mt Ruapehu - Te Heuheu Peak

 Climbing Te Heuheu - In the second week of June 2000, a big Antarctic cyclone blew up across the Southern Ocean. Pushing a front 500 kilometres wide, the low pressure system sucked cold air up from the sea and drove it North to lower latitudes. On Sunday it struck the land mass of the South Island. The moisture laden air was driven upwards by the Southern Alps, dropping its load of water vapour as the first heavy snow falls of the winter season.

....read the full story at  adventurer.org.nz/Climbing_Te_Heuheu