"Guidance is most aligned on a moderate midweek refresh, strongest in central Honshu, where many mountains should pick up 10 cm-35 cm, with the wettest favored terrain closer to 25 cm-45 cm."
"The more coherent storm arrives Tuesday, builds Tuesday night, and tapers Thursday, and confidence is higher on that timing than on peak intensity. Snow-level guidance is converging on mostly 300 meters to 1,100 meters while it is snowing, with brief warm pushes near 1,300 meters before levels fall again."
"SLRs are mostly 8-10 early in bursts (dense snow), then closer to 10-13 late Wednesday into Thursday (moderate to occasionally lighter quality), with ski-period temperatures generally near -6 C to 1 C during active snowfall."
A manageable weekend and Monday transition into the primary snow event from Tuesday through Thursday, with the highest confidence in this midweek window. Central Honshu mountains should accumulate 10-45 cm, with the wettest terrain receiving 25-45 cm. Snow levels range from 300-1,100 meters during active snowfall, with winds generally 10-30 km/h and occasional ridge gusts of 40-60 km/h. Snow-to-liquid ratios are 8-10 early, shifting to 10-13 late Wednesday into Thursday. Temperatures during snowfall average -6°C to 1°C. Friday provides a brief reset window before a larger, lower-confidence storm system develops Saturday through early next week with greater uncertainty in intensity, snow levels, and wind impacts across the region.
Read at SnowBrains
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