Avalanche Bulletin
更新日時: 2023/01/28 07:00
Niseko Yotei Yoichi Shiribeshi
Alpine Good Wind slab from the previous storm still exists and will continue to develop on slopes lee to the wind with more snow and wind in the forecast.
Treeline Good Wind slab from the previous storm still exists at tree line as well and will continue to develop on slopes lee to the wind with more snow and wind in the forecast.
Below Treeline Good The snow is very deep below tree line and in sheltered areas protected from the wind can have instabilities in the new snow.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
It's been an exciting time to be in Hokkaido. With strong recent snow and wind, the terrain and landscape in the mountains is very dynamic. New wind features and changes in terrain will look different. Expect unstable snow in all elevation bands. Dial it back. Travel observantly and with caution and talk with your riding partner about good terrain choices appropriate for the conditions.
Avalanche Problem
ウインドスラブ Wind slab
Recent gale force winds and heavy snow fall have created wind slabs on slopes lee to the wind. The force of the wind and the great amount of snow suggest an instability still exist and will continue to exist especially in the alpine and at tree line with pockets below tree line as well.
点発生乾雪雪崩 Dry Loose snow
With recent considerable snow fall up to 100cm in places and more in the forecast. Sheltered slopes protected from the wind may hold very deep lighter density snow on all aspects.
概要
Avalanche
There has been reports of shooting cracks and skier triggered wind slab avalanches in the area and loose dry avalanches on slopes sheltered from the wind.
Snowpack
There has been much snow and wind in the region recently. This has made for great skiing through the region, however all the new snow remains on the temperature crust. The temperature crust is becoming weak and is buried up to 100cm down in the snowpack in some zones. The temperature crust will need to be continually observed for any weak layers that may develop around the crust.
Weather
The recent gale force winds and heavy snowfall have given way to calmer winds and steady light snow that should continue through the weekend with short moments of sun possible.
