Forecasts specifically for Turoa and Whakapapa ski fields will be produced by MetService.
Previous forecasts have covered Tongariro National Park, lumping together the two ski fields and wider mountains area.
MetService will work with Ruapehu Alpine Lifts (RAL) to improve the accuracy of the forecasts in the national park and on New Zealand's two largest ski fields.
Different areas of the park, and the two ski fields, can have different weather.
Forecasts will now be generated using a mix of computer generated and manual forecaster assessment, increasing the accuracy.