Avalanche Bulletin
更新日時: 2022/04/02 06:00
Myoko
Alpine Low
Treeline Fair
Below Treeline Good 日中の昇温と日射の影響に留意
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Pay attention to the instability of the wind slab, which remains locally in the Alpine. Since the hard snow surface is under the slab, it is easy to cause incidents where thin plate-shaped snow near the snow surface breaks, rather than an avalanche in the general image, where the foot is scooped up and slipped down. This can happen in both mountaineering and sliding, so be sure to think about whether there are “terrain traps” such as cliffs below the slope, or whether there are safer routes. The wind is also in the direction where it subsides, and it seems to be a very pleasant spring day. Have a fun holiday
Avalanche Problem
ウインドスラブ Wind slab
概要
Avalanche
There are no the new avalanche observation reports yesterday (1st). On the other hand, there are reports of surface avalanches of size 1.5 on the eastern slope of the Alpine in the neighboring Hakuba Mountains.
Snowpack
In the Alpine area, snowfall until last morning has moved with strong northwesterly winds, forming wind slabs. Since the amount of snowfall was small, the difference between locations is large, such as where hard thawing and freezing surfaces are exposed, and where fresh snow moves to form slabs. On the other hand, where the elevation is lower than the forest limit, the snow surface is hard and frozen due to the influence of radiative cooling.
Weather
The Japan Meteorological Agency predicts southern wind, daytime, north wind, sunny, and high temperature of 10 degrees Celsius (elevation 13 m) for the Joetsu region of Niigata prefecture. The temperature is -10℃ (as of 5:00) at Myoko Sasagamine (elevation 1,310m).
