Avalanche Bulletin
更新日時: 2025/03/02 05:30
Hakuba
Alpine Fair Onset and intensity of snowfall or rainfall
Treeline Fair Onset and intensity of snowfall or rainfall
Below Treeline Fair Onset and intensity of rainfall
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
High temperatures have continued since yesterday, expanding glide cracks and destabilizing snow blocks on cliff-like terrain. Even if it does not start raining, the danger of glide avalanches is rising, so please avoid such slopes. Instead of going out to the mountains today, it may be more fun to ski on the nicely groomed courses at the ski resort. In the ski area, watch out for unstable snow blocks near the slope by the beginner course. If you see someone resting in such spots, be gentle and give them a word.
Avalanche Problem
全層雪崩 Glide slab
Weak nighttime cooling and high temperatures yesterday resulted in a lot of melt water. Even if rainfall does not begin, consider slopes with glide cracks to be in poor condition. Be on the lookout for collapsing snow blocks on cliff-like extreme terrain. Do not enter slopes with glide cracks and do not stay below them.
点発生湿雪雪崩 Wet Loose snow
Rating is as of morning. The likelihood increases with the onset of rainfall.
概要
Avalanche
Some size 1 wet loose snow avalanches were observed in the treeline below treeline yesterday (1st). An expansion of glide cracks was also reported.
Snowpack
The snowpack is in a "spring cycle" of repeated Melt and Freeze. Yesterday, the Amedas Hakuba (703 m) recorded 13.8°C at 14:00, and positive temperatures have continued since then. With snow melting at lower elevations, glide crack conditions should be considered very poor. Freeze hardness has increased to near the main ridge, but the snow on the north side at very high elevations is still dry.
Weather
The Japan Meteorological Agency is forecasting northerly winds, cloudy, then rain, with a daytime high of 13 °C (418 m elevation) for northern Nagano Prefecture. At Amedas Hakuba (elevation 703 m), the temperature is -0.2 °C (as of 5:00 a.m.), with no new snowfall in the past 12 hours. At the main ridge (elevation 2,400 m), the temperature is -1.5 °C (as of 5:00), with northerly winds averaging 15 m/s and with maximum wind speeds exceeding 20 m/s.
