Avalanche Bulletin
更新日時: 2023/03/23 05:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Please keep in mind that large-scale wet loose snow avalanches can occur on large steep slopes. Due to the high temperatures and strong solar radiation, the snowpack strength has reduced to a deep level. Wet snow is so heavy that even small avalanches can easily push people off. Check for "terrain traps" below the slope. Cliffs, glide cracks, and deep gullies can be high hazards. The snow is melting and the danger of glide avalanche continues. Please be vigilant on slopes with glide cracks, even at Treeline. The weather is slowly worsening. Have a good day.
Avalanche Problem
全層雪崩 Glide slab
At lower elevations, high temperatures continue throughout the night.
点発生湿雪雪崩 Wet Loose snow
Ratings are as of the morning.
概要
Avalanche
Yesterday (March 22), size 1 wet loose snow avalanches were observed in all aspects at lower elevations.
Snowpack
Due to the high temperatures and solar radiation over consecutive days, the snow has become sufficiently wet and reduced in strength deep in the snowpack surface layer. Since only the surface of the snowpack freezes when the temperature drops at night, conditions are such that loose snow avalanches can occur as soon as the temperature rises during the day and the snow is exposed to strong solar radiation. Therefore, the size of loose snow avalanches can be large on large slopes.
Weather
The Japan Meteorological Agency is forecasting southerly winds, cloudy skies, rain in the evening, and a high of 19°C (418 m elevation) for northern Nagano Prefecture. At Amedas Hakuba (elevation 703 m), the temperature is 8.7°C (as of 5:00). Yesterday, at Amedas Hakuba, a maximum temperature of 21.3°C (at 3 pm) was recorded.
