Avalanche Bulletin
更新日時: 2025/03/07 05:30
Hakuba
Alpine Fair Differences in snowfall amounts by areas
Treeline Fair Differences in snowfall amounts by areas
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
In the northern areas where snowfall has been heavy, watch out for wind slabs and storm slab hazards. Underneath the fresh snow is a hard, melt-frozen crust that makes a good bed surface for avalanches. Also, small avalanches can catch your footing and cause you to slip and fall. In addition, previously rough snow surfaces are hidden under the fresh snow, making it difficult to ski. Snow blocks that have fallen from trees are solid and can cause injuries and falls. Please ski carefully.
Avalanche Problem
ウインドスラブ Wind slab
In areas with heavy snowfall, there is greater avalanche potential. Pay attention to the condition of the upper snowpack and look for slab formations.
ストームスラブ Storm slab
In areas with heavy snowfall, check the bonding of the boundary between new and old snow. Avoid steep slopes and ensure safety margins in terrain.
概要
Avalanche
No new avalanche reports were received yesterday (6th).
Snowpack
The snowfall since yesterday evening is on top of the hard frozen snow surface from the rainfall on March 5. This new snow is locally heavy only in the northernmost part of the Hakuba Valley, with 30 cm below treeline, while in the south, the amount is slight. In addition, very strong northerly winds are blowing on the main ridges, and wind slabs are expected to form. Previously rough snow surfaces (e.g., snow blocks that had fallen from trees, tracks of skiing, debris, etc.) are hard frozen and hidden by thin new snow.
Weather
The Japan Meteorological Agency is forecasting northerly winds, cloudy skies, snow in places, and a daytime high of 3 °C (418 m elevation) for northern Nagano Prefecture. At 703 m elevation (Hakuba), the temperature is -3.6 °C (as of 5:00 a.m.), and 2 cm of snow has fallen in the past 12 hours. At the main ridge (elevation 2,400 m), the temperature is -16 °C (as of 5:00), with northerly winds averaging 17 m/s and a maximum instantaneous wind speed of about 20 m/s.
