Avalanche Bulletin
更新日時: 2025/01/25 06:00
Myoko
Alpine Low Depends on the degree of snowfall
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
If you are going to a higher elevation, carefully check the snow condition. The boundary surface between new and old snow is located at a shallow depth, so it should be relatively easy to survey. In doing so, it is important to think of yesterday and today as "different days. Look at the snow with fresh eyes. Tough crusts are forming at lower elevations. Please be careful not to fall down unintentionally.
Avalanche Problem
ストームスラブ Storm slab
Note locations where the surface snow has the characteristics of a slab and the snowpack has a tendency to become unstable (convex or unsupported terrain). At higher elevations, the snow is cold enough and needs time to stabilize.
全層雪崩 Glide slab
In areas with very low elevation and rainfall
概要
Avalanche
Yesterday (24th), below treeline, glide avalanches of size 1-1.5 and snow block collapses were observed, probably originating from the previous day. In addition, wet loose snow avalanches were observed on ski cuts on slopes strongly affected by sunny slopes.
Snowpack
In the treeline and alpine areas, 10-20 cm of new snow is on top of the old snow. Formidable Melt-Freeze crusts are forming on the southern slopes, and there is settled old snow on the northern slopes at higher elevations. No major problems have been observed in the mid-snowpack at the treeline and below treeline. The northern area of the avalanche bulletin had received about 10 cm of snowfall by this morning.
Weather
The Japan Meteorological Agency is forecasting westerly winds, later northerly winds, cloudy, snow or rain in the evening, and daytime high temperatures of 7 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -7 °C (as of 4:45 a.m.), with no new snowfall in the past 12 hours.
