Avalanche Bulletin
更新日時: 2022/01/30 04:45
Kagura Tanigawa Hotaka
Alpine Low
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Pay attention to the presence of storm slabs, which are present on steep slopes. It is expected that the boundary surface with the old snow is not progressing, so it is necessary to pay attention to inducing it in places where the slope changes rapidly or on open steep slopes where trees are sparse. Be especially careful in places like the Tanigawadake area with many steep slopes. It is a forecast that the pressure arrangement of the winter type will continue. Pay attention to changes in weather, such as an increase in snowfall or the effects of wind in the future.
Avalanche Problem
ストームスラブ Storm slab
概要
Avalanche
Yesterday, there was a report that observed a large number of surface avalanches size 1-2 in the Tanigawadake area, but the details are unknown.
Snowpack
Sedimentation proceeds and bonds are rising in the middle layer of snow cover. On a steep south-facing slope with a low elevation, a crust is formed due to the influence of solar radiation on the 26th, and in places where there is a lot of snowfall until yesterday, it is placed about 70 cm on it, and it gradually settling to form a soft slab. A layer with low density was observed on the boundary surface, and there was a report of poor coupling in the vicinity of Tanigawadake, where there are many steep slopes. Crusts are formed on steep slopes that are sunny during the day and are closer to the south. Snowfall from midnight is expected to be about 20-30 cm above it.
Weather
As of 4:00, the temperature is -3.0 degrees Celsius at AMeDAS Fujiwara. There has been 5 cm of snowfall in the past 12 hours, and snowfall continues in the vicinity. According to the Japan Meteorological Agency's announcement at 17:00 on the 29th, the winter-type atmospheric pressure arrangement continues, and due to the influence of the cold, the northern part of Gunma prefecture is forecast to be cloudy before noon to sunny in the afternoon, and there are places where snow falls.
