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ニセコなだれ情報 第75号 Niseko Avalanche Info No.75

 

山麓6時-3度降雪なし、モイワ800m-7.1度西南西8.41m/s飛雪雪庇ふきだまり発達、見返り分岐降雪なくふきだまり発達、アンヌプリ1120m積雪深250cm1100m-10.2度西北西8.60m/s、ヒラフ山頂-11度北西20m/s1000m-9.8度北9.70m/s、ビレッジ水野の沢-8.46度北西8.9m/s、アメダス倶知安-1.7度東北東1.0m/s積雪深175cm、弁慶岬北北西12m/s、神威岬北西12m/s気圧1015hPa波高2.6m、

 

風は強いが降雪なく標高800m以上で飛雪による雪庇ふきだまりが発達、試験から雪庇は衝撃が伝播しやすく容易に崩壊する。ゲート開閉は未定。バトロールの判断に従うこと。朝のうちの雪崩リスクはやや高い。大沢、鉱山の沢側壁標高900m付近では2月17日層から破断面厚40cmの雪崩の可能性がある。風が弱まりリフトが回り出しても風下雪庇斜面には行かないほうが良い。谷底を避けて滑ること。ロープをくぐらないこと。新雪を求めて立ち入り禁止区域に入ってはならない。周辺の山でも条件は変わらない。開けた急斜面やガリーでは注意。ゲレンデは硬いがすばらしく良い。

 

Mountain base 6am: -3℃, no snowfall. Moiwa800m: -7.2℃, WSW8.41m/s, cornice and snowdrifts developments due to wind-blown snow. Mikaeri junction: no snowfall, new snowdrift development. Annupuri1120m: 250cm snow depth, -10.2℃ WNW 8.6m/s at 1000m. Hirafu peak: -11℃, NW20m/s, 1000m -9.8℃, N9.7m/s. Niseko Village Mizuno no Sawa: -8.46℃, NW8.9m/s. Kutchan Weather station: -1.7℃, ENE1.0m/s, 175cm snow depth. Benkei cape: NNW12m/s, Kamui cape: NW12m/s, 1015hPa, 2.6m waves.

 

The wind remains strong but no snowfall. Cornices and snowdrifts have grown due to wind-blown snow and are very unstable. Gates opening is undetermined. Please respect the ski patrol’s decisions. The avalanche risk is considerable in the morning. 40cm thick slides from Feb 17th layer are likely to occur in O-sawa and Backbowl’s 900m slopes. The chairs might start running as the wind calms down, however it is strongly recommended not to approach leeward cornice slopes for a while. Avoid riding the bottom of the valleys and never duck ropes to enter the out of bounds areas. Strictly off-limits areas are closed for a good reason. The snow condition is the same in the surrounding mountains; beware of open steep slopes and gullies.

The groomers are firm but in excellent condition.

| - | 07:35 | - | - | pookmark |