ニセコなだれ情報 第101号 Niseko Avalanche Info No.101

 

山麓5時風弱く気温+3.5度曇り モイワ800m南西224度1.3m/s+2.4度 アンヌプリ1100m西265度4.4m/s-0.1度 湯の沢1000m西南西259度4.8m/s+0.3度 ビレッジ900m南西223度2.9m/s+0.6度 ヒラフ1000m+0.9度 花園720m北北西338度+2.3度 日本海弁慶岬南5m/s 神威岬東北東2m/s気圧1015hPa波高0.7m アンヌプリ1000m積雪190cm

 

低気圧の接近で日本海から強い暖気が入り午後遅くから雨。山は融雪が進み沢は増水する。日中は沢の側壁や雪庇下から小規模な全層雪崩が起こりやすくなり、今夜半から明日未明にかけて標高1000-1500mふきだまり斜面で規模の大きな全層雪崩が起こる可能性が高まる。朝までに新たな降雪はないが標高800m以上はガスで視界不良。山は良くない。各山頂ゲートの開閉は未定、パトロールの判断に従うこと。低気圧通過後、明日以降再び寒気が入る。今日は昨日とちがって光が少なく斜面の凹凸が見えづらい。慎重な滑走を。山は急速に春に移行している。

 

Mountain base 5am: calm, +3.5℃. Moiwa800m: SW 224°1.3m/s, +2.4℃. Annupuri1100m: W2    265°4.4m/s, -0.1℃. Yu no sawa1000m: WSW 259°4.8m/s, +0.3℃. Village900m: SW 223°2.9m/s, +0.6℃. Hirafu1000m: +0.9℃. Hanazono720m: NNW 338°, +2.3℃. Sea of Japan Benkei cape: S5m/s, Kamui cape: ENE2m/s, 1015hPa, 0.7m waves. Annupuri 1000m snow depth 190cm.

 

Warm air if flowing in as a new low pressure system is approaching from the Sea of Japan. Rain is forecasted to fall in the afternoon. Thaw will speed up and creeks will swell. Small size glide avalanches are expected to occur in gullies sidewalls and under cornices during the day. Large scale glide avalanches will also likely occur in 1000-1500m leeward slopes with heavy snowdrift deposit from this evening to tomorrow morning. There is no new snowfall and fog is present above 800m elevation. The mountain is in pretty bad condition. Gates opening are undecided. Please respect the patrol’s decisions. Cold air will come in as the low pressure system passes. Low light today and it’s difficult to see the surface. Please ride carefully. The mountain is quickly shifting into spring.

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