雪崩情報 Avalanche Information雪崩情報の使い方
ニセコ・羊蹄・余市・尻別 Niseko Yotei Yoichi Shiribeshi
雪崩危険度と傾向 Avalanche Danger Rating and Trend
|標高帯 Elevation||信頼度 Confidence||コメント Comments|
|アルパイン Alpine||Good||Low volume wind slab remains unreactive and is isolated to ridgelines. Loose-dry activity may be triggered in very steep terrain.|
|森林限界 Treeline||Good||Stable conditions with little instability to be found. The coming days will be a good time to explore the backcountry using safe travel techniques.|
|森林帯 Below Treeline||Good||Be mindful of glide cracks that you may not be able to see from above but are opening up and are a hazard at lower elevations|
留意すべき雪崩 Avalanche Problem
点発生乾雪雪崩 Dry Loose snow
Possibility of loose dry activity in very steep terrain that we would expect will be low volume.
What appears to be a size two was reported on the 20th on Nitonupuri. The slab was released on the SW aspect on a slope that was approximately 35 degrees in the Alpine. The observation was made from a distance so it is not known if it was natural or human triggered.
Isolated pockets of low-volume winds slabs remain on lee slopes at ridgeline although they appear to be unreactive. The 10 - 20cm of new snow we picked up on Thursday night has fallen on a stable snowpack and was only producing small loose dry activity in steep terrain. A thin crust has formed below this latest new snow on solar aspects.
A high-pressure system reaches across Hokkaido bringing low winds from the North to the West over the weekend and into next week. Little in the way of snowfall is predicted as we expect broken clouds and periods of sunshine.
行動と地形の助言 Travel and Terrain Advice
With the potential for sunny days and good visibility, the coming days are a great opportunity to get out in the backcountry. With warmer temperatures during the middle of the day be mindful of glide cracks that will continue to open up at lower elevations. Avoid spending any time on a slope underneath one of these cracks as any failure can have high consequences.
フィールドで新しい雪崩など、不安定性を示す重要な情報を観察しましたら、「投稿フォーム」あるいは「メール」で情報をお寄せ下さい。皆様からのご協力が雪崩情報の向上に寄与します。If you observe important information that indicates instability, such as a new avalanche, please send us the information using the "Information Posting Form" or "Email". Your cooperation will help us to improve the avalanche bulletin. Thank you.