2025.01.31 Friday

Mountain base -5℃, 15cm snowfall. Moiwa 800m: -6.7℃, NNW10.7m/s, large development of cornice and snowdrift slabs. Mikaeri 750m: -7.0℃, NW2.3m/s, 20cm snowfall. Annupuri 1100m: -9.1℃, WNW6.7m/s, large cornice development. Hirafu Hanazono: -9.3℃, NNW7.4m/s, 15cm snowfall. Coastal data: Benkei cape NNW13m/s, Kamui cape NW11m/s, 1013hPa, 1.9m waves. 

Winter pressure distribution persists and the wind has been blowing around 10m/s on average, making slabs and cornices grow in SE aspects relatively quickly but slow enough to remain stable. The wind peaked around 18m/s at 10pm last night. The slab’s growth and stability is determined by the wind. The overall avalanche risk is low expect in the Backbowl sidewalls, Osawa cornice slopes and strictly off-limits areas such as Haru no taki. All gates are scheduled to open. Please follow the ski patrol’s instructions. The snow is back to Japow conditions as Colin Hackworth said. Overhead blower conditions can be found in some areas. Beware of trees, they’re stronger than you. Do not stay at the bottom of the gullies, avalanches run through the gully line. Avoid simultaneous riding and traversing. There are many people below you, please be considerate of others. Is your avy transceiver switched on? Have a nice day. 

Quote: Niseko Avalanche Information