Avalanche Bulletin
更新日時: 2024/12/28 07:00
Myoko
Alpine Low
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Very dangerous avalanche conditions. Even if you are in the forest, it is a day to think carefully about whether there are any start zones above you. The most important factor for avalanches is the steepness of slopes. If there is a weak layer with some degree of weakness, it may not occur on a 30° slope in response to a human stimulus, but it may at 40°. Even if you are in the below treeline, pay attention to the state of slab formation at the upper snowpack and the degree of slope. For less experienced skiers, this is a good day to enjoy powder in the ski area. Please watch the signs carefully and enjoy the areas where it is possible to ski. Have a good weekend.
Avalanche Problem
ストームスラブ Storm slab
There is a weak layer within the new snow that has not yet gained strength.
ウインドスラブ Wind slab
Westerly winds averaging about 15 m/s continue to wipe in Alpine.
概要
Avalanche
No reports of avalanches in the mountain areas were received yesterday (27th) due to stormy weather. On the other hand, a size 1 storm slab avalanche was reported at the ski resort's morning safety control.
Snowpack
A series of snowfalls that began in the afternoon of December 26 brought snow depths of about 60 cm around 1,300 m elevation. Snowfall amounts were higher in the northern part of the mountain range. At lower elevations, there is a layer under the new snowfall that has been strongly affected by rainfall, causing glide cracks and other problems. Of greatest concern is the vulnerability within the massive snowfall.
Weather
The winter pressure pattern is weakening, but cold air continues to move in. The Japan Meteorological Agency is forecasting northwest winds, snow or rain, and daytime high temperatures of 2 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature was -6 °C (as of 5:45 a.m.), and 3 cm of snow had fallen in the past 12 hours.
