Avalanche Bulletin
更新日時: 2023/01/29 05:30
Hakuba
Alpine Fair Keep in mind the effect of wind
Treeline Fair Look for wind effects on the snow surface. If there are any signs, reduce the slope and avoid areas that are prone to instability, such as uneven terrain.
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Heightened avalanche conditions on specific terrain features. Be on the lookout for isolated steep slopes and storm slabs that have formed where the terrain is convex or otherwise difficult to support snowpack. The snow is well-cooled, and even with gentle slopes, it is a good day for powder skiing with good underlying support. There are "terrain traps" scattered throughout the forest, including holes in creek bottoms. Use your imagination to see what is hidden under the snowpack and choose safe routes. The mountain is expected to be crowded. Keep in mind the principle of stopping at safe places and moving at intervals. And pay attention to the movements of other groups in the same terrain. Have a good day.
Avalanche Problem
ストームスラブ Storm slab
持続型スラブ Persistent slab
Uncertainty remains a concern
概要
Avalanche
Several size 1 loose snow avalanches or storm slab avalanches were reported yesterday (January 28) Below Treeline.
Snowpack
Snowfall from the evening of January 27 through noon of January 28 reached 30-60 cm in the Below Treeline. The situation was unstable as of yesterday morning, with loose snow avalanches and size 1 avalanches by ski cuts, but settling was observed to have progressed in the afternoon. Melt-Freeze crusts formed by the January 14 rainfall, which are under continuous observation, remain a concern.
Weather
The Japan Meteorological Agency is forecasting southerly winds, northerly winds during the day, cloudy, sometimes sunny, snowy in places, and a maximum temperature of 1°C (418 m elevation) for northern Nagano Prefecture. At the foot of Mt. Hakuba (elevation 703m), the temperature is -6.4°C (as of 5am), with no new snowfall in the past 12 hours.
