ニセコなだれ情報 第82号 Niseko Avalanche Info No.82

山麓-8度降雪20cm、モイワ800m-11.5度西16.8m/s降雪20cmふきだまり発達、アンヌプリ1150m-16度北北西18m/s降雪30cm、ヒラフ1250m-16度風弱く降雪20cm、日本海神威岬西12m/s気圧1014hPa波高2.6m、

 

前線の通過と気圧経度の変化により西寄りの風雪が継続。雪の量はやや多く山麓では未明にかけて20-30cm、標高800m以上ではふきだまりがゆっくりと発達。アンヌプリ大沢、鉱山の沢、東尾根などの雪庇斜面、ノールの雪崩リスクは引き続き高い。観察から予測発生面は2月23日低気圧降雪層。上載ふきだまりの安定は進んでいるが注意。南面立ち入り禁止区域に入ってはならない。雪庇面や急斜面のトラバース、同時滑走をしてはならない。各山頂ゲートの開閉は未定。森の中の雪は良い。ニセコルールの尊重を強く求める。

 

昨日春の滝南東面の雪崩で亡くなったサム・アームストロングに哀悼の意を捧げる。大勢の友人が彼の死を悲しんでいる。残されたご家族にお悔やみを申し上げる。

 

Niseko base: -8℃, 20cm snowfall. Moiwa800m: -11.5℃, W16.8m/s, 20cm snowfall with snwodrifts development. Annupuri1150m: -16℃, NNW18m/s, 30cm snowfall. Hirafu1250m: -16℃, light breeze, 20cm snowfall. Kamui cape lighthouse: W12m/s, 1014hPa, 2.6m waves.

 

A westerly wind with snowfall is persisting as a cold front passed and barometric longitude shifted and delivered 20-30cm of fresh snow at the base overnight. The snowdirfts have developed slowly around 800m elevation. Avalanche risk remains high around cornices and knoll terrains at Annupuri Osawa, Backbowl and Higashi-One. Potential trigger layer is Feb 23rd’s low-pressure snowfall. The stabilization of the newly formed snowdrifts is progressing, however hazard level remains high and caution is required at all times. Do not enter the south facing strictly off-limits areas. Traversing across cornice or steep slopes and/or many people dropping into the same slope at the same time is a very bad idea. Peak gates’ opening is yet to be decided. The snow in the treeruns is very good. We strongly demand everyone to play by the rules.

 

We would like to express our deepest condolences for Sam Armstrong who passed away in an avalanche in Haru No Taki area south-east slope yesterday and offer our heartfelt sympathy for his family and friends.

 

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