Avalanche Bulletin
更新日時: 2022/01/02 06:30
Hakuba
Alpine Low
Treeline Low
Below Treeline Fair 昨日は人の刺激でウィンドスラブが動いています。慎重に行動しましょう。
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is a dangerous and difficult condition. The snow was moved a lot by the wind yesterday. At high elevations, snow accumulation and wind slabs may be synonymous. Instead of suddenly jumping into a large slope, you can say that it is a condition where you act cautiously looking for small slopes, slopes with loose slopes, and supported slopes. In addition, the ridge muscle blown away by the wind has become stiff, and the danger of slipping is also expected, so it is necessary to prepare well. It seems that action under forest limits is a fun day.
Avalanche Problem
ウインドスラブ Wind slab
アルパインエリアでは、他の標高帯に比べ、安定化が一番最後になります。
ストームスラブ Storm slab
概要
Avalanche
Yesterday (1 day), a size 2 surface avalanche was observed on the southeast-facing slope of 1600m, and a full-layer avalanche of size 1.5 on the south-facing slope of 1100m. Both are naturally occurring. As for the Alpine area, visibility is poor and almost no observations have been made.
Snowpack
The stormy weather that lasted from the end of the year (30th) brought a lot of snowfall. It was greatly redistributed due to strong winds in the morning of yesterday (north-north-northwest direction). Wind slabs are formed on the snowy surface in the forest zone. The layered structure changes greatly depending on the location, and it exhibits an unstable structure depending on the location. Overall, settling tends to progress and stabilize, but it cannot be denied that slabbing in the process increases the possibility of larger avalanches.
Weather
The Meteorological Agency predicts that the northern part of Nagano prefecture will be covered by an anticyclone centered in the south of Japan, but it is expected to be affected by the barometric valley and the front going south through the Sea of Japan, and clouds will gradually spread in the afternoon. At AMeDAS Hakuba (elevation 703m), the temperature is -16.9℃ (as of 5:00).
