Start with overnight snowfall and wind direction. Here, a cold inland trough is the pattern to watch, so the useful question is how cold and calm the next window stays. With a 908 to 1350 metre elevation band and 440 metres of vertical, the sheltered trees make modest reloads feel deeper than the raw number. A seasonal baseline around 13 metres means moderate-looking totals can still refresh the main lines quickly. The swing variable is wind: light flow lets the trees refill, while a hard blast strips the exposed entrances. Use the access rules on the day as the limit, then let the wind and temperature decide how far to push it. Chase it when 15 to 25 cm lands overnight with light to moderate wind; if gusts climb, make it a sheltered-tree day.
See which resorts in Nagano are getting the best 24 hour totals and the next two days of snow.
