Avalanche Bulletin
更新日時: 2025/01/07 06:30
Myoko
Alpine Low
Treeline Low
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is a day of increased avalanche danger associated with wind and snow. At higher elevations, wind-driven snowfall has begun. The amount of new snow, still at least, should make it necessary to consider terrain with a higher degree of safety, assuming it is unstable. On days when visibility is poor, it is harder to notice terrain above you. Even if you are in the woods, be on the lookout for start zones above you. Also, stay away from glide cracks that have already formed.
Avalanche Problem
ストームスラブ Storm slab
全層雪崩 Glide slab
Be more careful in the lower elevations north of the mountain range where temperatures were warmer and rainfall was heaviest.
概要
Avalanche
Yesterday (6th), snowballs were observed at lower elevations.
Snowpack
The previous stormy snow that constitutes the upper layer of snowpack has settled. At higher elevations, snowfall since yesterday afternoon is on top of the old snow. Because of the high temperatures, the new snow is quickly sintering and forming slabs immediately after it falls. In areas where snowfall is least heavy and where the snowpack tends to be unstable, such as on convex terrain, avalanches are more likely to occur from the interface between the new snow and the old snow. In addition, at lower elevations, the snow melted because it rained instead of snowed.
Weather
The Japan Meteorological Agency is forecasting westerly winds, slightly strong, rainy, and occasionally cloudy skies with a daytime high of 7 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -2 °C (as of 5:45 a.m.), with no new snowfall in the past 12 hours.
