
Compare the 24-hour total with the wind line first. The headline number only helps once you know whether a cold inland trough is the pattern to watch. With a 700 to 1050 metre elevation band and 350 metres of vertical, the gladed pockets are the first place to check once the groomers get tracked. A seasonal baseline around 8 metres means small clean refills matter more than waiting for a giant number. The swing variable is midday warming, which decides how long the first good surface lasts. If you are looking beyond the ropes, only chase that angle when the forecast also shows settled wind and stable visibility. Chase a settled cold morning after the storm; skip a windy day where the surface never gets a chance to reset.
See which resorts in Nagano are getting the best 24 hour totals and the next two days of snow.