Avalanche Bulletin
更新日時: 2025/02/09 06:30
Myoko
Alpine Low Lack of information due to stormy weather
Treeline Low Lack of information due to stormy weather
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Dangerous avalanche conditions continue. In all elevation zones, be alert for steep slopes where the surface layer of snowpack has slab characteristics. Also, even if you are in the forest, consider whether there are avalanche start zones above you. Conditions are still present where very large avalanches can occur. Storm snow is very deep and soft. In some places it is difficult to get up after a fall. Be alert for “terrain traps” where even very small avalanches can bury you completely. Inexperienced skiers are advised to ski fresh snow in the ski resort.
Avalanche Problem
ウインドスラブ Wind slab
Westerly winds averaging about 20 m/s in Alpine.
ストームスラブ Storm slab
Be wary of steep slopes where the surface layer of snow cover has the characteristics of a slab.
概要
Avalanche
Several size 1 wind slab avalanches were reported yesterday (8th) in the below treeline. All were triggered by skiers. No information has been received at higher elevations due to stormy weather.
Snowpack
The peak of snowfall has been exceeded, but in areas where snow clouds are passing through, there has been some weak snowfall, with 10-15 cm of snow having fallen by this morning. stormy snow that began on February 4 is now around 180-200 cm. In the below treeline, it has been observed that the lower layer of storm snow is sintering and slowly gaining strength. On the other hand, avalanches have been observed where wind slabs have formed.
Weather
The Japan Meteorological Agency is forecasting winds out of the west, with a slight wind chill, snow, and a daytime high of 4 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -8 °C (as of 5:45 a.m.), with no new snowfall in the past 12 hours.
