Avalanche Bulletin
更新日時: 2024/01/08 05:30
Hakuba
Alpine Good
Treeline Fair
Below Treeline Fair Watch for open slopes in the forest.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Very dangerous avalanche conditions. We recommend that inexperienced skiers enjoy themselves in the ski resorts. If you do so, do not enter the closed areas. It is for your safety and at the same time important for the safety of other visitors. In the mountains, we are in a situation where very large avalanches can occur. Think carefully about whether there is a large start zone above you. Even if you are at a lower elevation, this is a very important perspective. Be conservative in your route setting and follow a principled course of action. The gully in the Below Treeline is not yet completely filled. Consider that there are holes hidden under the fresh snow and act accordingly.
Avalanche Problem
ストームスラブ Storm slab
概要
Avalanche
Yesterday (January 7), several size 1 loose snow avalanches caused by ski cuts were observed in very steep terrain.
Snowpack
Snowfall since the night of January 6 has reached 60-70 cm in the upper treeline. The snowfall has been intermittently interspersed with areas of weak bonding within the fresh snow, which can lead to avalanches. Melt-Freeze crusts are also forming on sun-exposed surfaces, providing a good bed surface for large avalanches. Even if the bonding conditions seemed "not too bad" yesterday, there is a very large load on it today. Do not rely on yesterday's judgment.
Weather
The Japan Meteorological Agency is forecasting northerly winds, snow, cloudy afternoon, then sunny, with a daytime high of 2 °C (418 m elevation) for northern Nagano Prefecture. At 703 m elevation (Hakuba), the temperature is -4.4 °C (as of 5:00 a.m.), with 26 cm of snow having fallen in the past 12 hours. Strong winter pressure pattern. At an elevation of 1850 m, snowfall amounts over the past 12 hours have been around 50 cm, with more on the northern side of the Hakuba Valley. Strong west to northwest winds averaging 15 m/s and up to 30 m/s are blowing on the main ridge.
