SnowBrains Forecast: 10-20 cm for Japan Through Wednesday, Up to 40 cm at Kiroro - SnowBrains

"From Sunday night through Wednesday night, the individual models are reasonably well converged on a cold refresh across most of Japan, even though they still vary on which Hokkaido bands overperform. West Hokkaido has the best setup, with Kiroro favored for 29 cm-42 cm in the most dependable period and Niseko, Furano, and Sapporo Teine lined up for smaller but still worthwhile additions."

"Snow levels stay near sea level in Hokkaido and mostly below about 300 meters across central Honshu during the steadiest snow, so this first wave looks like a clean all-snow event for the major ski terrain. Snow quality also trends better in the north, where SLRs mostly sit in the 14-16 range for fairly light snow, while most Honshu resorts land closer to 10-14 for moderate to fair quality."

"From Thursday through Saturday, the individual models still agree that another wave reaches Japan, but they diverge much more on timing, intensity, snow levels, and wind. Central Honshu has a real chance at another 10 cm-30 cm, especially from Yuzawa through Myoko and Shiga, but the spread is large enough that some resorts could end up well below that if the drier solutions win out."

A strong weather system will bring substantial snowfall across Japan from Sunday night through Wednesday night. West Hokkaido, particularly Kiroro, is positioned for the heaviest accumulations of 29-42 cm, while Niseko, Furano, and Sapporo Teine will receive smaller but significant additions. Most Honshu resorts should accumulate 10-20 cm, with the main burst occurring late Monday through Tuesday affecting Gala Yuzawa, Shiga Kogen, Nozawa, Akakura, and Naeba. Snow levels will remain near sea level in Hokkaido and below 300 meters in central Honshu, ensuring quality all-snow conditions. Northern regions will experience lighter snow with better quality, while Honshu resorts will see moderate to fair conditions. A second system is expected Thursday through Saturday, though model guidance shows significant uncertainty regarding timing, intensity, and snow levels.

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