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ニセコなだれ情報 第69号 Niseko Avalanche Info No.69

山麓6時-8度降雪12時間20cm、モイワ800m-11.5度西6.2m/s、見返り分岐降雪15cmふきだまりやや発達、アンヌプリ1120積雪深240cm、ヒラフ山頂-16度12時間降雪20cm、水野の沢-13.01度北西3.8-5.6m/s降雪12時間11cm山麓積雪深180cm、弁慶岬北北西12nm/s、神威岬西北西9m/s気圧1022hPa波高1.3m、

 

朝にかけて10-20cmの降雪、顕著なふきだまりの発達はない。標高により雪質が異なるが明瞭な不連続面はなく全体の雪崩リスクは低い。標高1100m以上は北西風の影響で30-40cxmが弱くスラブ化しており滑走刺激で破断する可能性がある。風下急斜面では注意。谷底や斜面途中にとどまってはならない。ノール、雪庇下のトラバースを避けること。各ゲートは朝から開けられる。天候急変に注意。

 

子どもを連れてコース外に出る時、親や保護者の責任は重い。初心者や子供に自己責任は問えない。冬山には多くの危険が潜んでいる。雪庇で遊ぶなどの安易な冒険は時に事故を招く。常に用心深い行動を。雪は今日も良い。新たにできた雪庇は崩れやすいので注意。良い一日を 

 

Mountain Base 6.00am: -8°, 20cm snowfall in the last 12hrs, calm. Moiwa 800m: -11.5°, W6.2m/s. Mikaeri Weather Station: 15cm new snow, minor snowdrift development. Annupuri 1120m: snow depth 240cm. Hirafu Peak: -16°, snowfall 20cm in last 12hrs. Mizuno no Sawa: -13.01°, NW3.8-5.6m/s, 11cm snowfall in last 12hrs, mountain base: snow depth 180cm. Cape Benkei: NNW12m/s, Cape Kamui: WNW9m/s, pressure 1022hPa, wave 1.3m.

 

10-20cm new snow until early morning with no significant snowdrift development. Snow quality is varying dependant on elevation. Snow pack is not showing any obvious inconsistent layers and general avalanche risk is low. Above 1100m a weak slab 30-40cm has formed from the NW wind and there is the possibility of fracture from rider stimulation. Be careful on leeward steep slopes. Do not wait halfway down or in the valley bottoms. Avoid traversing under knolls and cornices. All gates are expected to be open. Be aware of a sudden weather change.

 

Parents or guardians taking children into out of bounds areas carry a heavy responsibility. Children (or beginners) cannot bear this responsibility. There are many dangers lurking in the winter mountains. Playing around cornices and other dangerous features can end in a very serious accident. Always act with safety in mind. Snow is good today. New cornice growth is easily collapsing, be careful.

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