Avalanche Bulletin
更新日時: 2024/01/15 06:00
Myoko
Alpine Fair Be on the lookout for increased wind and snow.
Treeline Low Be on the lookout for increased wind and snow.
Below Treeline Fair Be on the lookout for increased wind and snow.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is a day of increasing avalanche danger as the weather worsens. Be on the lookout for storm slabs formed by westerly winds. Be on the lookout for "terrain traps" lower down the slope where avalanches can have small but deadly consequences. Snow in the below treeline is still light, lower branches of trees are hidden by fresh snow, and holes in stream bottoms are open. Careful terrain selection and proper group management are very important.
Avalanche Problem
ストームスラブ Storm slab
Watch for storm slabs formed by westerly winds.
概要
Avalanche
Yesterday (14th), a size 1 slab avalanche was reported in the ski resort avalanche management. A size 1.5 storm slab avalanche was also observed in the backcountry in the Myoko mountain area.
Snowpack
Around the time of the date change, new snowfall began, with 20 cm of new snow on the northwest side of the Myoko Mountains and 10 cm on the south side. With the passage of the cold front, strong westerly winds have begun to blow and move the snow.
Weather
The weather outlook is for an intensification of the winter pressure pattern. The Japan Meteorological Agency is forecasting a slightly strong westerly wind, snow, and daytime high temperatures of 3 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -4 °C (as of 4:45 a.m.), and 11 cm of snow has fallen in the past 6 hours.
