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Niseko Avalance Information

ニセコなだれ情報 第78号 Niseko Avalanche Info No.78

山麓6時-8度降雪5cm、モイワ800m-13度北西12m/s雪庇発達降雪20cm、アンヌプリ1150m-16度北西20m/s雪庇ふきだまり発達降雪30cm、ヒラフ1250m-18度南西10m/s降雪20cm、弁慶岬灯台北北西15m/s、神威岬西北西13m/s気圧1013hPa波高2.2m、

 

冬型の気圧配置の中で標高800m以上西側では10-15m/sの風雪が続き雪庇、ふきだまりがゆっくりと大きく成長。ふきだまりの発達は一様ではなく不連続面から破断しやすい。見返りボウル雪庇斜面、アンヌプリ大沢雪庇斜面、鉱山の沢側壁雪庇斜面、藤原の沢雪庇斜面、東尾根雪庇斜面では雪庇崩壊や滑走刺激による雪崩が起こりやすいので注意。

 

雪庇 の成長は非常に大きい。予想よりはるか手前で破断する。近寄ってはならない。下敷きになると悲惨なことになるので雪庇下にいてはならない。観察、各データの評価から一般的斜面の雪崩リスクは低く樹林帯以下の雪は素晴らしく良い。雪庇下の谷地形、急な落ち込み(ノール)を避けること。

 

各ゲートの開閉はリフト運行にもよるが未定。パトロールの指示に従うこと。立ち入り禁止区域の滑走はルールで厳しく禁じられている。ロープをくぐりコース外へ出てはならない。ビーコンの着用を勧める。持っていれば万一の時に仲間を助けられるかもしれない。視界不良、凍傷に注意。良い一日を。

 

Niseko base 6.00am: -8°, 5cm new snow. Moiwa 800m: -13°, NW12m/s, 20cm new snow, cornice development. Annupuri 1150m: -16°, NW20m/s, 30cm new snow, cornice and snowdrift development. Hirafu 1250m: -18°, SW10m/s, 20cm new snow. Coastal data: Benkei Cape: NNW15m/s. Kamui Cape: WNW13m/s, 1013hPa, wave 2.2m.

 

We are in the middle of a typical winter weather pattern and a westerly snow wind 10-15m/s is blowing above 800m on west side, cornices and snowdrifts are slowly becoming very large. Snowdrift development is not uniform and breaks easy from an inconsistent surface. Beware of cornice collapse or rider stimulated avalanche at following locations: Mikaeri bowl cornice slope, Osawa cornice slope, Kozan no sawa side wall cornice slope, Fujihara no sawa cornice slope and Higashi One cornice slope.

 

Cornice growth is has been massive and they are breaking much further back than you would expect. Do not get too close, if you go down with one when it collapses you will get hurt, or worse. From observation and data, the general avalanche risk is low. Below the tree line in the forest snow is good. Avoid the valley terrain under cornices and steep knolls.

 

Gate opening is yet undecided and dependant on lift operation. Please listen to the patrols advice. Entering strictly off limits areas is prohibited under Niseko Rules. Do not duck ropes to go out of bounds. Beacons are recommended, they may save your or your friends life. Beware bad visibility and frostbite. Have a good day.


For more information visit Niseko Avalanche Information.


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