Avalanche Bulletin
更新日時: 2024/01/26 06:00
Myoko
Alpine Low Be wary of wind slabs formed in terrain pokects.
Treeline Low There is great avalanche potential.
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Terrain selection is the key day. The snowfall has subsided, but the instability of the snowpack has not yet been resolved. Instead of jumping into a big slope, it is necessary to start with a small safe terrain and check the snowpack condition. In gully terrain, the snowpack varies depending on the direction of the side of the terrain. It is common for a small avalanche to start on the side of a gully and then expand in size by engulfing the snowpack in the center of the gully. Consider the size and slope of the terrain. Look for areas where wind effects are weak and avoid windslabs. Use conservative route-setting and ensure basic group management. Snowpack has increased, but is still low at lower elevations compared to previous years. Be alert for terrain traps.
Avalanche Problem
ウインドスラブ Wind slab
The higher the elevation, the more vigilant.
ストームスラブ Storm slab
Consider that the low temperatures are continuing, so the fresh snow changes slowly.
概要
Avalanche
Yesterday (25th), a shooting crack was reported in the treeline below. It is occurring on a slab affected by the wind. No information has been received at higher elevations.
Snowpack
The series of snowfalls that began on the evening of the 23rd subsided yesterday evening (25th). The snowfall due to the stormy weather reached 80-100 cm in the upper part of the treeline below. Limited observations indicate that the bonding of new snow and old snow is not too bad below treeline.
Weather
The Japan Meteorological Agency is forecasting a slightly windy, snowy, and occasionally cloudy day with a daytime high of 4 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -8 °C (as of 4:45 a.m.), with 3 cm of snow having fallen in the past 12 hours, 25 cm in the past 24 hours, and 41 cm in the past 36 hours.
