Avalanche Bulletin
更新日時: 2024/02/06 06:00
Myoko
Alpine Fair
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Watch for storm slabs formed by yesterday's snowfall. Also, if winds begin to blow in the future, watch out for the snow and direction it moves in. Consider that if moderate winds blow for a few hours, the danger level on the downwind side of the slope will increase significantly. Even in the forest, avalanche conditions are possible due to loose snow. Pay attention to stream geometry and slopes in the forest. Although a good amount of snow has fallen, the hight of snow at lower elevations is not sufficient. Imagine that this new snow hides holes in the stream bottom, glide cracks, and many other hazards. Inexperienced groups will probably have a good day with fresh snow in the ski area. If you do, we ask that you please observe the skiing areas.
Avalanche Problem
ストームスラブ Storm slab
Consider the formation of very soft slabs. The higher the elevation, the more vigilant you should be about the bonding condition of the interface between new and old snow. The most effective strategy is to look for slopes that are less sloping.
点発生乾雪雪崩 Dry Loose snow
Even in the forest, if the slope is very steep, assume that a loose snow avalanche is possible. Snow is heavy and even small avalanches can be fatal.
概要
Avalanche
Yesterday (5th), a size 1 loose snow avalanche was observed during daytime avalanche management at the ski resort. This was due to snowfall during the day.
Snowpack
With the passage of the low pressure system, about 20-30 cm of snow fell during the day and into the night yesterday. This was on top of hard snow surfaces such as Melt-Freeze crusts and wind slabs. Snowfall stopped late last night and is slowly beginning to settle. Even at higher elevations, winds continue to be light, with the wind direction being south at the time of snowfall and now northwest.
Weather
The Japan Meteorological Agency is forecasting southerly winds, daytime, westerly winds, snow or rain, occasionally cloudy, with 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 -6 °C (as of 4:45 a.m.), with 18 cm of snow having fallen in the past 12 hours and 36 cm in the past 24 hours.
