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ニセコなだれ情報 第4号 Niseko Avalanche Info No.4

 

山麓6時-9度降雪12時間20cm弱い吹雪、日本海弁慶岬北西13m神威岬西12m気圧1018hPa波高2.1m、標高1100m北西15m雪庇ふきだまり発達、

 

冬型の気圧配置の中で弱い吹雪、雪が良すぎで笹が寝ないためブッシュは埋まっていない。光線が弱く斜面地形が見ずらい。コース脇では雪の下の障害物に注意。

標高800m以上ではふきだまりの発達が続き、稜線直下のノール、雪庇斜面は厚さ50-60cmのソフトスラブが破断しやすい。降雪推移、現況から西尾根、鉱山の沢側壁では雪崩リスクが高い。

面発生表層なだれは吹雪の中で起こりやすい。無理のない計画を。今怪我をしては勿体ない。雪は素晴らしく良い。凍傷に注意。良い一日を。

 

Niseko base 6am: -9℃, 20cm snowfall in 24hours, weak storm. Sea of Japan Benkei cape NW13m/s, Kamui cape W 12m/s, 1018hPa, 2.1m waves. NW15m/s at 1100m elevation, cornices and snowdrifts developing.

 

A mild storm is persisting under the typical winter pressure distribution. The snow is so light it won’t push the bamboo-grass down. Bushes are still present all around the mountain. The snowdrift development continues above 800m and the soft-slabs formed at knolls below the ridges and the cornices are likely to slide at 60-80cm thickness. Looking at the weather transition and the current conditions, the avalanche hazard is high at the west-ridge and Backbowl’s east facing slopes.

 

Surface slab avalanches are very likely to occur during storms. Better make conservative plans and decisions and avoid being injured at the start of the season.

The snow is excellent today. Beware of frostbites and enjoy your day.

| - | 07:56 | - | - | pookmark |