ニセコなだれ情報 第8号 Niseko Avalanche Info No.8
山麓6時+2度風弱くみぞれ、モイワ800m-2度湿雪降雪5cm、昨夜半に南風のふきだまり発達、アンヌプリ1000m-5度西風おだやか、未明から降雪10cm、ヒラフ1000m-2度降雪わずか、日本海弁慶岬南6m/s、神威岬南南東6m/s気圧997hPa波高0.8m、
 
日本海を低気圧が通過中で南から暖気流入、標高1000m以上の風は西に変わりはじめ今後強まる。雪は新潟並みの湿雪、量が増えれば急斜面、崖やリフト線下で豆腐型の重い雪崩が起こりやすくなる。低気圧の通過後、明日にかけて風雪が強まり雪庇ふきだまりが急激に発達する。朝の観察では全体の雪崩リスクは低いが今後急激に高まる見込み。
 
雪は良いときも 悪いときもある。多くの雪崩事故は悪天候下で起こっている。今日はゲレンデから出ない方が良い。雪は変化する。観察と降雪推移から春の滝など南の崖斜面のリスクは午前中から高まる。新雪を求めてロープをくぐり、これらの立ち入り禁止区域を滑ってはならない。ニセコルールの尊重を。モイワ6番ゲートは閉じられる。
 
Niseko base 6.00am: +2°, light winds, sleet. Moiwa 800m : -2°, 5cm wet snow, snowdrift development around midnight from southerly wind. Annupuri 1000m: -5°,light westerly wind, 10cm new snow in early morning. Hirafu 1000m, -2°, trace new snow. Coastal data: Benkei Cape:S6m/s. Kamui Cape SSE6m/s, 997hPa, wave 0.8m.
 
A low pressure system is passing through the Sea of Japan, drawing warm air from the south into the area. Above 1000m the wind is starting to move around to the west and will become stronger through the day. Snow today is similar to Niigata- wet. If the depth of wet snow increases cliffs, lift lines and other steep slopes, heavy “tofu” like avalanches will easily occur. After the low pressure system passes, the wind is expected to pick up, bringing rapid cornice and snow drift growth. From this mornings observation the general avalanche risk is low, however it is expected to rise sharply during the day.
 
Snow conditions vary from day to day, one day good the next can be bad. Most avalanche accidents happen in bad weather. Today is a good day to stay in the ski resorts. From observation and snowfall transition, south facing steep slopes like Haru no Taki, the avalanche risk will be increasing through the day. Do not duck ropes and to enter Strictly Off Limits areas seeking fresh snow. Please respect and follow Niseko Rules. Moiwa Gate 6 will be closed.
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