Avalanche Bulletin
更新日時: 2022/02/08 05:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
It is a day when you need to be careful about the unstable snow remaining in certain terrain. Observe the terrain well and find out how the wind slabs are formed and the shape that makes it difficult for the terrain to support snow cover. There is good snow with a sense of gliding on the shady slopes, which are less affected by the wind. Simple terrain without “terrain traps” can be safely enjoyed. Take care of the principled mode of behavior, such as stopping in a safe place, watching people slipping, and not slipping onto its upper slope when a person falls in the middle of a slope. Have a nice day
Avalanche Problem
ストームスラブ Storm slab
地形が積雪を支えない孤立した場所など
ウインドスラブ Wind slab
概要
Avalanche
Yesterday (7th), an induced surface avalanche of size 2 was observed and reported on the southeastern slope of the forest belt. Also, since the field of view was opened, a large number of planar avalanches of size 1-2.5, which are thought to have occurred by the morning of the 7th, were observed in the northeast to east to southeast directions of all elevation bands.
Snowpack
It has been observed that snow in stormy weather proceeds with settling and sintering, but it is still necessary to pay attention to the instability that remains in isolated terrain. The wind at high elevations has subsided, and it is necessary to respond to windslabs that have elapsed over time. Hard slabs are difficult to estimate induced sensitivity, and ski-cutting is also unsuitable. In places with high elevations and strong wind effects, there are also places where the snow from this stormy weather is placed as a wind slab on the previously formed melting and freezing layer. In such places, under the influence of elevated temperatures during the day, it often happens that in the morning even hard slabs respond more easily to human stimuli in the daytime.
Weather
The Meteorological Agency forecasts the northern part of Nagano prefecture with northern wind, cloudy, early night, temporary snow, and a maximum temperature of 3℃ (elevation 418m). At the foot of Mt. Hakuba (elevation 703m), the temperature is -10.2℃ (as of 5:00), and there has been no new snowfall in the past 12 hours.
