Avalanche Bulletin
更新日時: 2025/01/21 06:30
Myoko
Alpine Fair Unknown snowfall since dawn
Treeline Good
Below Treeline Good Morning rainfall, degree of temperature rise during the day
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
The instability of previous stormy snow has been resolved and avalanche conditions are generally safe. There is currently very light snowfall at higher elevations, but no amounts are forecast to cause major problems. Forecasters expect the weather to improve later in the day. The northern slopes, slightly higher in elevation, still offer good snow. Watch out for glide cracks hiding ahead of the slope you are skiing.
Avalanche Problem
全層雪崩 Glide slab
Beware of extremely shaped terrain with glide cracks already in place.
概要
Avalanche
Yesterday (20th), numerous size 1-1.5 loose snow avalanches were observed on steep slopes facing east to south in the below treeline at lower elevations. In addition, several size 1-2 glide avalanches were observed on extreme slopes such as cliffs.
Snowpack
Three days of high temperatures and solar radiation have increased the thickness of the Melt-Freeze crust on the steep south-facing slopes. The snow on the north side of the treeline/alpine is dry, partly due to radiation. Here at higher elevations, a slight snowfall from earlier in the day is on the list.
Weather
The Japan Meteorological Agency is forecasting westerly winds, cloudy skies, rain or snow in places until late afternoon, and daytime high temperatures of 8 °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.
