Avalanche Bulletin
更新日時: 2023/03/03 05:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is a day of heightened avalanche conditions in certain terrain. Be alert for unstable slabs that form on the leeward side of the ridge and on the flanks of the branch ridges. It is important that the terrain is simple enough to support a snowpack and that you choose slopes with gentle slopes. Today is a great day to enjoy pleasant powder snow under wonderful weather. However, please communicate with your companions so that your exuberance does not disrupt your decision-making and lead you into more hazardous slopes. Continue to follow a principled course of action, stopping at safe spots and skiing one person at a time. This will reduce the number of accidents that may occur. Have a good day.
Avalanche Problem
ストームスラブ Storm slab
Watch for slabs formed with northwest winds. Also, large start zones that open to the south are more at risk from daytime temperatures and solar radiation.
概要
Avalanche
Yesterday (March 2), a size 1.5 storm slab avalanche was observed on the northeast slope of the treeline. Shooting cracks were also reported.
Snowpack
The 30-50 cm of snow that began falling yesterday morning is on Melt-Freeze crusts or settling snow. This new snow is under the influence of a very strong northwest wind and is forming slabs on the leeward side. Yesterday, a shooting crack, or slab avalanche, occurred due to the stimulation of the newly formed slab. Snowfall ended last night, but there are places where the instability of this new snow remains in a state that can be triggered by a single human stimulus.
Weather
The Japan Meteorological Agency is forecasting a southerly wind, later northerly wind, clear skies, and a maximum temperature of 8°C (418 m elevation) for northern Nagano Prefecture. At AMeDAS Hakuba (elevation 703 m), the temperature is -7.7 °C (as of 5:00 am), and 4 cm of snow has fallen in the past 12 hours.
