Avalanche Bulletin
更新日時: 2023/02/21 06:00
Myoko
Alpine Good
Treeline Good
Below Treeline Good
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Very dangerous avalanche conditions. Even if you are at a lower elevation, you need to think carefully about whether there are any large start zones above you. Also, be very wary of slabs that form where the terrain is difficult to support snowpack, such as convexity. If you avoid the wind and ski in the forest, do not forget that new snow may be hiding hazardous elements. Rain has created holes in the gully bottom and spread glide cracks, which are now hidden by the new snow. For less experienced skiers, this is a day to enjoy the powder snow in the ski area. If you do so, please make sure to observe the skiing area. Over the past 25 years, there have been no avalanche fatalities on open runs in Japan. This is an extremely excellent record compared to Europe and North America. This safety is due to the diligent daily management of the ski patrol.
Avalanche Problem
ストームスラブ Storm slab
ウインドスラブ Wind slab
概要
Avalanche
Yesterday (February 20), there was a size 1 loose snow avalanche in the Below Treeline area due to surface snow movement caused by ski cuts. At higher elevations, there were few people entering the mountain and no information was received.
Snowpack
It is wet to the Treeline, and there is new snow on it since the early morning of the 19th. The amount of new snow varies by elevation zone, with higher elevations having more new snow. This new snow has increased rapidly since yesterday, reaching 70-80 cm Below Treeline. This new snow has been redistributed under the influence of strong northwest winds. The rain of the 18th has expanded the glide cracks, which are now hidden by this snowfall.
Weather
The Japan Meteorological Agency is forecasting westerly winds, snow, and a high of 2°C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Myoko Sasagamine (elevation 1,310 m), the temperature is -10° (as of 5:45 a.m.).
