Avalanche Bulletin
更新日時: 2025/03/03 06:30
Hakuba
Alpine Fair Uncertainty in the amount of new snow
Treeline Fair Uncertainty in the amount of new snow
Below Treeline Fair Uncertainty in the amount of new snow
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
The situation is that there is fresh snow from earlier in the day on a well-wetted snow surface at lower elevations and on a frozen snow surface at higher elevations. Watch for storm slabs or loose snow avalanches on steeper slopes with more fresh snow accumulation. At very low elevations, stay away from slopes with glide cracks. Even as temperatures drop, the danger of glide avalanche does not diminish immediately. When visibility is poor, it is difficult to be aware of your surroundings. Please be cautious while maintaining good communication with your fellow skiers.
Avalanche Problem
ストームスラブ Storm slab
Watch out for steep slopes that have accumulated more fresh snow since dawn.
点発生乾雪雪崩 Dry Loose snow
Fresh snow deposited on very steep terrain
全層雪崩 Glide slab
Even if there is fresh snow on the snow surface, the underlying snowpack is still wet enough from yesterday's rainfall and elevated temperatures. The glide movement of the snowpack will not settle abruptly, so be alert for glide cracks in extreme terrain formations today at very low elevations.
概要
Avalanche
Yesterday (2nd), glide avalanches were observed at lower elevations. Snowballs were also observed.
Snowpack
The upper layers of the snowpack were sufficiently wet from yesterday's rainfall and elevated temperatures. At lower elevations, the entire snowpack lost strength, causing glide avalanches and snow block collapses. Snowfall then began early in the morning. If snowfall increases in the future, it will be necessary to check the bonding of new snow with old snow.
Weather
The Japan Meteorological Agency is forecasting northerly winds, snow, cloudy from midday, and a daytime high of 2 °C (418 m elevation) for northern Nagano Prefecture. At Amedas Hakuba (elevation 703 m), the temperature is -0.4 °C (as of 6:00 am), and there has been about 8 mm of precipitation in the past 12 hours. At the main ridge (elevation 2,400 m), the temperature is -4.6 °C (as of 6:00), with northeast winds averaging about 3 m/s.
