Avalanche Bulletin
更新日時: 2025/01/20 06:30
Myoko
Alpine Fair
Treeline Good
Below Treeline Good Depends on the degree of temperature rise
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Generally safe avalanche conditions. Watch for locally unstable snow remaining in isolated terrain. Even a size 1 avalanche can be serious if there is a "terrain trap" below it, so be sure to check the terrain. Even on days when the snowpack is stable, please take some risk-reducing actions in accordance with the general rules of conduct. This is because such behavior will minimize damage in the event of an emergency. Habits are not formed in a day. There are many glide cracks. Please pay attention to changes a slope.
Avalanche Problem
ウインドスラブ Wind slab
Beware of partially unstable snow forming on extreme terrain shapes.
全層雪崩 Glide slab
Note the very low elevation and extreme terrain with glide cracks already in place.
概要
Avalanche
Yesterday (19th), a size 1 wet loose snow avalanche was observed on a steep, sun-exposed slope below treeline.
Snowpack
Continued clear skies and high temperatures caused three things to happen. First, on the steep south-facing slopes, where the effects of sunny slopes and high temperatures were stronger, snow melted on the snow surface during the day and crusts formed at night; second, on the north-facing, windless slopes, radiation caused heat to escape, drying out and lightening the snow; and third, the generally warm air promoted sintering and settling of the upper snowpack layers. settling.
Weather
The Japan Meteorological Agency is forecasting a southerly, late, northwesterly wind, cloudy, with a daytime high of 12 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -3 °C (as of 4:45 a.m.), with no new snowfall in the past 12 hours.
