Avalanche Bulletin
更新日時: 2024/01/20 06:00
Myoko
Alpine Low
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Be on the lookout for soft slabs that have formed in areas where the snowpack is likely to be unstable (extreme shapes, convex shapes, shapes that do not support the snowpack underneath, etc.). Slabs that are easily recognizable and firm do not form, as they do after strong winds. However, soft slabs have formed due to the progressive sintering of the snow and the movement of the snow under the influence of weak winds, which reacted to the human stimulus yesterday. Please act on the assumption that conditions will continue to be generally the same today as the day before and check the snowpack conditions. When visibility is poor, it is harder to notice hazards above you. Please manage your group by making good use of the terrain.
Avalanche Problem
ストームスラブ Storm slab
点発生乾雪雪崩 Dry Loose snow
概要
Avalanche
Yesterday (the 19th), several size 1-1.5 glide avalanches were observed at lower elevations. Several size 1 loose snow avalanches or size 1-1.5 storm slab avalanches were observed at higher elevations.
Snowpack
Observations at Treeline indicate that the bonding of old and new snow is not as bad as it could be. The storm slab avalanche reported yesterday was due to snowfall on the 18th. Wind conditions have remained light since yesterday until this morning, but in areas where there is some wind influence, the snowpack has the characteristics of a slab and is more responsive to human stimulation.
Weather
Today, the weather will be covered by high pressure at first, but then will be affected by a trough. The Japan Meteorological Agency is forecasting southerly winds, northeasterly winds during the day, cloudy skies, rain or snow at night, and daytime high temperatures of 6 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -7 °C (as of 4:45 a.m.), with no new snowfall in the past 12 hours.
