Avalanche Bulletin
更新日時: 2025/02/04 06:30
Myoko
Alpine Low
Treeline Low
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Strong snowfall has begun. Avalanche danger increases with the amount of snowfall. As snowfall increases, it is necessary to check the boundary surface between new and old snow as well as a weak layer within the new snow. Assuming that the instability of the snowpack will rapidly worsen, choose terrain with a large safety margin. As visibility decreases, it is harder to notice hazardous elements above you. Careful route selection is also necessary. Inclement weather is forecast to continue for several days. Inexperienced groups are advised to stay within the ski area.
Avalanche Problem
ストームスラブ Storm slab
The danger level will increase with future increases in snowfall.
概要
Avalanche
No new avalanches were reported yesterday (3rd).
Snowpack
Yesterday's high temperatures and some rainfall have sufficiently settled and wet the snow at lower elevations. This snow surface is covered with snowfall that began this morning. Strong snowfall has already started in the northern part of the Myoko mountain range. Heavy snowfall is forecast for the next few days. In the higher elevations, there is a possibility that low cohesive snow fell during the passage of a low pressure system yesterday. This snow has been observed in the adjacent Hakuba Mountains. If this snow is present at higher elevations, avalanche danger increases rapidly with snowfall volume.
Weather
The Japan Meteorological Agency is forecasting winds out of the west, slightly stronger, snow, and a daytime high of 3 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature was -7 °C (as of 5:45 a.m.), and 3 cm of snow had fallen in the past 12 hours. The Niigata District Meteorological Office (NDMA) is forecasting 80 cm of snowfall along the mountains of the Joetsu region at 6:12 a.m. on the 4th in the 24-hour period ending at 6:00 a.m. on the 5th.
