Heavy snow is expected to fall on parts of the South Island this weekend as an "intense" front moves across the country.
The MetService today issued a rare November snow warning for the Canterbury high country between Porters Pass and Lake Ohau.
Heavy rain is forecast to turn to snow tonight above 600m as cooler air pushes in from the far south.
The MetService warned that up to 50cm of snow was expected to fall to between 800-500m from this evening until tomorrow morning. Forecasters are warning more than 1m of snow was possible at higher elevations.
Arthurs and Porters Passes were expected to be affected by the deteriorating weather conditions.
The forecaster has issued a swathe of heavy rain warnings and watches as the front crosses the country. ringing heavy rain to central New Zealand.