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ニセコなだれ情報 第106号 Niseko Avalanche Info No.106

山麓6時+5.5度曇り、モイワ800m+1.96度東3.9m/s降雪なし霧、アンヌプリ1100m+1.4度西南西4.50m/s、ヒラフ1000m+1.5度南南西9.30m/s、アメダス倶知安+7.0度南南西1.3m/s積雪深96cm、日本海弁慶岬風よわくおだやか、神威岬東北東2m/s気圧1008hPa波高0.7m、

 

強い暖気が入り標高800m以上でもプラス気温、融雪が急激に進むため標高800m以下の崖斜面、亀裂斜面では全層雪崩が起こりやすくなる。谷底にいてはならない。標高700m以下では雪庇崩壊や亀裂の拡がりによるブロック雪崩に注意。山は春に移行しているが低気圧通過後は再び寒気が入り、ふきだまりが発達して表層雪崩が起こりやすくなる。春の低気圧は時に急激に発達して不安定な雪庇やふきだまりを短時間で作る。

 

今日の雪はストップ雪で滑りにくい。また光線がなく起伏が見えづらい。用心深い滑走を。沢の増水が始まる。スノーブリッジ崩壊に注意。細いロープの携行を奨める。

 

Mountain base 6am: +5.5, cloudy. Moiwa800m: +1.96, E3.9m/s, no snowfall, fog. Annupuri1100m: +1.4, WSW4.5m/s, Hirafu1000m: +1.5, SSW9.3m/s. Kutchan weather station: +7.0, SSW1.3m/s, 96cm snow depth. Benkei cape: calm. Kamui cape; ENE2m/s, 1008hPa, 0.7m waves.

 

The temperature stayed above freezing level in areas above 800m elevation due to the strong warm air inflow. Thaw will progress drastically and glide avalanches are to be expected in steep slopes above 800m and slopes with cracks. Better stay away from the valley bottom. Block avalanches due to collapsing cornices and expanding cracks are also to be highly expected in area below 700m. The mountain is shifting to Spring, however another cold airmass is forecasted to come in after the low-pressure passes. Another snow storm is expected and surface slab avalanche risk will rise as new snowdrifts develop. Spring low-pressure can suddenly gain energy and generate drastic formation of cornices and snowdrifts.

 

Today’s snow is sticky and the light is weak. Be careful when riding. Streams are expected to swell. Beware of falling snow-bridges. It is highly recommended to carry a thin rope.

| - | 08:12 | - | - | pookmark |