Avalanche Bulletin
更新日時: 2022/02/11 04:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Pay attention to the specific slope formed by the wind slab, the locality within the slope. In particular, large terrain facing east to southeast to south requires sufficient vigilance. The bottom of the slab is diverse depending on the location: a thawing frozen crust formed by previous solar radiation, a hard slope hammered by the wind, or even a low density of snow the day before. Don't feel relieved just because it was okay in a certain place. Check if the terrain has a shape that supports the snow cover, whether there are “terrain traps” at the end of the slope, etc. The consecutive holidays have begun, and the mountains are expected to be crowded. Pay attention to your location and relationships with other groups based on your perception of avalanche terrain. Have a safe day
Avalanche Problem
ウインドスラブ Wind slab
概要
Avalanche
Several very small point avalanches due to daytime snowfall have been observed yesterday (10th).
Snowpack
The impact of the low pressure that caused heavy snow to fall in the Kanto region yesterday was small in the Hakuba Mountains, and the amount of snowfall was small. After that, it became a winter-type atmospheric pressure arrangement, but it has not become a cohesive snowfall. In the vicinity of the main ridge, strong northerly winds are blowing, and in places higher than the upper part of the below treeline, it is necessary to pay attention to the formation of wind slabs caused by the wind. No noticeable vulnerability has been observed below the middle layer of snow cover.
Weather
The Japan Meteorological Agency is forecasting snow and a maximum temperature of 4℃ (elevation 418m) until evening for the northern part of Nagano prefecture depending on the north wind, cloud, and place. At the foot of Mt. Hakuba (elevation 703m), the temperature is -3.2℃ (as of 4:00), and snowfall of 4 cm has been recorded in the past 24 hours.
