Avalanche Bulletin
更新日時: 2024/04/07 05:30
Hakuba
Alpine Fair Watch for rising temperatures during the day and the effects of solar radiation.
Treeline Fair Watch for rising temperatures during the day and the effects of solar radiation.
Below Treeline Fair Watch for rising temperatures during the day and the effects of solar radiation.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
It will be a typical "spring day". In the morning we will be on the lookout for slides on frozen slopes, enjoy comfortable runs on corn snow just as the snow begins to loosen up, and then struggle with wet snow before noon due to high temperatures and strong sunny slopes, and then crusty, tough snow in the late afternoon. All of these are due to changes in the surface snowpack, so if you carefully observe the snow changes, you will be able to choose better slopes at the right time. On the other hand, glide avalanches, which occur on slopes with glide cracks, can be very difficult to predict. One thing to remember is that on days when there is a lot of meltwater, glide avalanches can occur even at night. For this type of avalanche, having a frozen snow surface does not guarantee safety. What is needed is to avoid such slopes. Today is the last avalanche bulletin for the 2023/34 season in the Hakuba mountain area. Thank you very much for your interest.
Avalanche Problem
全層雪崩 Glide slab
Assessment is as of morning. Numerous glide cracks have been observed, up to higher elevations. Consider the possibility of cracks beyond the convex terrain where you cannot see the end of the terrain.
点発生湿雪雪崩 Wet Loose snow
評価は朝の時点でのもの。昨日はアルパインまでプラスの気温となり、その後の冷え込みも弱い状態が続いています。早朝からきれいに晴れていますので、日射を強く浴びる急斜面では、昨日よりも、雪の強度の低下が早いと考えてください。
概要
Avalanche
Yesterday (6th), several loose snow avalanches of size 1-1.5 were observed.
Snowpack
At lower elevations, the entire layer of snow is wet with a snow temperature of 0°C and is not frozen as of morning. At slightly higher elevations, the snow surface may be frozen in the morning, but with rising temperatures and solar radiation, it quickly becomes wet, and by noon, water floats on the snow surface, making it stop-snow. At the higher elevations, good timing can provide pleasant corn snow, but it is necessary to choose clean slopes because in many areas there is yellow sand and dust floating on the snow surface. On the ridge tops, the ground is beginning to expose itself, and even near the treeline, the gully is cracking and there are numerous glide cracks.
Weather
The Japan Meteorological Agency is forecasting southerly winds, daytime, northerly winds, clear, nightly, cloudy, and a daytime high of 22 °C for northern Nagano Prefecture. At 703 m elevation, the temperature is 4.0 °C (as of 5:00 a.m.) at AMeDAS Hakuba. Yesterday, 17.5 °C (3 pm) was recorded at Amedas Hakuba, with a temperature of about 10 °C also recorded around 1,500 m elevation.
