Avalanche Bulletin
更新日時: 2022/01/07 05:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
The avalanche conditions are generally heading in a good direction, but today we want to pay special attention to the snow that has fallen since the early hours and the new wind slabs formed by westerly winds. Those who raise the elevation above the upper part of the below treeline should be wary of it first. Even if the amount of snowfall is 10 cm, there are terrains that accumulate about 3 to 5 times on the leeward side due to the influence of the wind. If there is an avalanche there, an avalanche of a scale that buries people will occur. Don't forget to check if there is a “terrain trap” below the slope. Clever group management using topography will reduce damage in case of emergency.
Avalanche Problem
ストームスラブ Storm slab
ウインドスラブ Wind slab
未明からの降雪と西風による新たなウインドスラブの形成に警戒を
概要
Avalanche
Since the weather recovered yesterday (6th), many traces of large avalanches of size 2—3 have been observed mainly on the south-southeastern slopes at an altitude of 2,000 m or more. These avalanches occurred during the cycle of stormy weather.
Snowpack
From the upper part of the below treeline to the high elevation, there is a great diversity of snow accumulation due to heavy snowfall due to stormy weather and further northerly storms. Where it is hit by the wind, the hard snow surface is exposed, and where the wind blows in, it is packed even within the swamp terrain. Also, there is snow where you can enjoy comfortable gliding in places that are not affected by the wind. Yesterday, it was confirmed that some parts of the snow were not sufficiently increased in the stormy weather near the forest limit. Pay attention to places where snow cover is prone to instability in terms of topography.
Weather
The Japan Meteorological Agency forecasts northern Nagano prefecture with northern winds, cloudy occasional sunny weather, and a high daytime temperature of 1℃ (elevation 418m). At the foot of Mt. Hakuba (elevation 703m), the temperature is -3.7℃ (as of 5:00). Snowfall of about 10 cm is observed from the early dawn to the morning at an altitude of 1,000 m.
