Avalanche Bulletin
更新日時: 2025/01/21 05:30
Hakuba
Alpine Fair Unknown amount of snowfall since dawn
Treeline Good Unknown amount of snowfall since dawn
Below Treeline Good Daytime temperature rise and degree of solar radiation
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
Stay away from slopes that already have glide cracks.
概要
Avalanche
Yesterday (20th), due in part to clear skies and high temperatures, several size 1-2 glide avalanches were observed on the south slope of the forested area at lower elevations. In addition, a size 1 loose snow avalanche was observed on a steep slope on the south side of the below treeline with a ski cut,
Snowpack
Three days of high temperatures and sunshine have increased the thickness of the Melt-Freeze crust on the steep south-facing slopes. Since yesterday's freezing level was around 1,600 m, the snow on the north side of the treeline/alpine is dry. Here at higher elevations, a slight snowfall from earlier in the day is on the list.
Weather
The Japan Meteorological Agency is forecasting northerly winds, cloudy, sunny before noon, and a daytime high of 7 °C (418 m elevation) for northern Nagano Prefecture. At AMeDAS Hakuba (elevation 703 m), the temperature is 0.0 °C (as of 5:00 a.m.), with no new snowfall in the past 12 hours. Alpine (elevation 2,400 m) has a temperature of -10.3 °C (as of 5:00) with an average wind speed of 3 m/s.
