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ニセコなだれ情報 第89号 Niseko Avalanche Info No.89

山麓5時+1度降雪なし、モイワ800m0度南5m/s湿雪降雪5cm、アンヌプリ1150m-3度南西15m/s降雪わずか、ヒラフ山頂-4度南風強く濃霧視界不良、日本海弁慶岬南微風、神威岬南南西17m/s気圧1008hPa波高1.4m、

 

日本海の低圧帯を通って南から暖気流入、標高1000m以上は南風強く視界不良。降雪の量はわずかだが標高700m以上は浅い湿雪に覆われており急斜面では広く流れやすい。過去72時間の風雪によるふきだまりは観察と試験から安定しており一般的斜面の雪崩リスクは低い。しかし量が多いので標高1000m鉱山の沢西尾根側、同アンヌプリ大沢雪庇斜面、東尾根奥など標高差の大きな急斜面では規模の大きな全層 雪崩または深部層からの雪崩が起こる可能性がある。事故を避けるため谷底を滑ってはならない。各ゲートの開閉は未定。パトロールの指示に従うこと。ロープをくぐりコース外に出てはならない。

 

雨模様で天気はあまり良くない。雪は湿っており板を取られやすい。亀裂への転落や衝突に注意。今日はなだらかな森の中の散策を勧める。良い一日を。

 

Niseko base 5.00am: +1°, no new snow. Moiwa 800m: 0°, S5m/s, 5cm wet snow. Annupuri 1150m: -3°, SW15m/s, trace new snow. Hirafu peak: -4°, strong southerly wind, foggy, poor visibility. Coastal data: Benkei Cape: light southerly wind. Kamui Cape: SSW17m/s, 1008hPa, wave 1.4m.

 

Warm air is flowing into the region through a low pressure system in the Sea of Japan. Above 1000m a strong southerly wind is blowing and visibility is poor. Although only a small amount of snow has fallen, a shallow cover of wet snow above 700m is sliding easily over wide areas on steep slopes. From observation and tests the snowdrift development from the storm over the last 72hrs has stabilised and general avalanche risk is low. However because of the amount snow there is the possibility of a large scale full depth avalanche or avalanche from a deep layer on longer steep slopes like Kozan no Sawa west ridge side around 1000m, Osawa cornice slope and the far side of Higashi One. To avoid accidents dont ride in the valley bottoms. Gate openings yet to be decided. Please listen to the patrols advice. Dont duck ropes to go out of bounds.

 

Its raining and the weather conditions are not good today. Its easy to catch and edge in the wet snow. Be careful falling into cracks. If your going for a hike, pick a gentle route in the forest. Have a good day.

 

| - | 07:46 | - | - | pookmark |