Start with overnight snowfall and wind direction. When a cold front pushing across the divide is the pattern to watch, the live numbers usually matter most in the first lift window. With a 830 to 1400 metre elevation band and 570 metres of vertical, the sheltered trees make modest reloads feel deeper than the raw number. A seasonal baseline around 9 metres means small clean refills matter more than waiting for a giant number. 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 10 to 20 cm lands overnight with light to moderate wind; if gusts climb, make it a sheltered-tree day.
See which resorts in Gunma are getting the best 24 hour totals and the next two days of snow.
