Avalanche Bulletin
更新日時: 2023/02/17 06:00
Myoko
Alpine Fair
Treeline Fair
Below Treeline Good Beware of high daytime temperatures and the effects of solar radiation
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Beware of unstable snow remaining on extreme terrain features or very steep slopes. Even small avalanches can have serious consequences if there are "terrain traps" with cliffs, glide cracks, trees, or rocks below the slope. The weather is stable and avalanche danger is low, so this is a good day to venture up to higher elevations, but be careful to avoid slipping and falling as the wind can make the snow hard in many areas. Remember that wide skis and split snowboards are vulnerable to hard slopes. With good visibility, observe the terrain carefully and reacquaint yourself with avalanche terrain and safe zones. Then continue to use safe terrain to get around. If you can't do proper route setting in good weather, there is no way you can move wisely in storm weather. There is still good snow on the slopes that are less affected by wind and sunny slopes. Have a good day.
Avalanche Problem
ウインドスラブ Wind slab
Unstable snow remaining in extreme terrain pockets
ストームスラブ Storm slab
Unstable snow remaining in extreme terrain pockets
概要
Avalanche
Yesterday (February 16), a number of size 2 slab avalanches, believed to have occurred during stormy weather, were observed over a wide area in the Myoko Mountains region.
Snowpack
The snowfall that began on February 13 continued until the morning of February 16 in the northern part of the Myoko mountain range (the area near the sea). This resulted in nearly 100 cm of new snow in some areas. It has been confirmed that this storm snow has been sintering and settling steadily. However, in certain areas, such as on very steep slopes, the bonding of new snow and Melt-Freeze crusts have not been completely strengthened.
Weather
The Japan Meteorological Agency is forecasting a southerly, late westerly wind, sunny, occasionally cloudy, with a high of 9° (13 m elevation) for the Joetsu region of Niigata Prefecture. At Myoko Sasagamine (elevation 1,310 m), the temperature is -14° (as of 5:45 a.m.).
