Avalanche Bulletin
更新日時: 2023/02/07 05:30
Hakuba
Alpine Fair
Treeline Good
Below Treeline Good Watch for instability in snowpack due to rising temperatures during the day.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Generally safe avalanche conditions. In the alpine, watch out for wind slabs on isolated terrain features. It is important to consider that these windslabs are not very reactive to human stimulation, but can be triggered in extreme slops. Also, warmer temperatures than yesterday is forecast. Stay away from slopes with glide cracks.
Avalanche Problem
ウインドスラブ Wind slab
概要
Avalanche
Yesterday (February 6), a human-triggered loose snow avalanche of size 1-1.5 was observed in the afternoon. This was due to solar radiation and elevated temperatures.
Snowpack
The recent snowfall of 20-40 cm was further enhanced by yesterday's favorable weather conditions, which further promoted settling. Crusts formed on south-facing slopes, and on north-facing slopes at lower elevations, the snow surface was wet. In Alpine, hard wind slabs, dull to human stimulation, have formed in localized areas, such as just below the ridge line.
Weather
The Japan Meteorological Agency is forecasting northerly winds, cloudy, sometimes sunny, with a high of 10°C (418 m elevation) for northern Nagano Prefecture. At the foot of Mt. Hakuba (elevation 703m), the temperature is -2.7°C (as of 5:00), with no new snowfall in the past 12 hours.
