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ニセコなだれ情報 第37号 Niseko Avalanche Info No.37

山麓-5度風弱く低気圧降雪10cm モイワ800m3.8m/s354度北-5.0度 ヒラフ1000m5.0m/s352度北-7.6度 花園720m2.0m/s349度北北西-4.5度 ビレッジ水野の沢900m1.5m/s328度北北西-7.4度 アンヌプリ1000m積雪155cm 日本海弁慶岬北北西6m/s 神威岬北北西5m/s気圧1021hPa波高0.8m

 

標高800m以上は12時間15cmの低気圧降雪が夜半の寒気流入と風で一部凍結し雪板化。試験では顕著な破断はないが、ふきだまりが発達した標高1000m付近の谷上部、風下側ふきだまり斜面では破断面30cmの浅い面発生表層雪崩が起こる可能性がある。トラックは消えていないが森の中の雪は良い。

 

アムール川の寒気と日本海の暖気との力関係が低気圧の進路に影響しているためか降雪パターンが変化しているように思う。しかし雪が降るのはありがたいことだ。各山頂ゲートは朝から開けられる予定。ゲートの外はスキー場ではない。ニセコルールの熟読を。本日アンヌプリ1番ゲートが開けられる。灌木と藪に注意。良い一日を。

 

Mountain base: -5, calm and 10cm low-pressure snowfall. Moiwa800m: 354°(N) 3.8m/s, -5.0. Hirafu1000m: 352°(N)5.0m/s, -7.6. Hanazono720m: 348°(NNW) 2.0m/s, -4.5. Niseko Village900m: 328°(NNW)1.5m/s, -7.4. Annupuri 1000m snowdepth: 155cm. Benkei cape: NNW6m/s, Kamui cape: NNW5m/s, 1021hPa, 0.8m waves.

 

15cm of low-pressure snowfall has blanketed slopes above 800m in the past 12h and have partially formed slabs due to the temperature drop and wind during the night. No prominent weak layers was observed during the morning tests, however 30cm thick surface slab avalanches are likely to occur in leeward slopes with snowdrift accumulation around 1000m elevation. Old tracks are still present, however the snow in the trees is in decent conditions.

 

The power balance between the Siberian cold airmass and the Sea of Japan warm airmass seems to influence the route of the low-pressure systems, eventually having an impact on the snowfall pattern of this season. Either way, it’s nice to see some snowfall. The peak gates are schedule to open from the morning. Always keep in mind that the out of bounds area is not the resort anymore. Have a good read of the Niseko Rules. Annupuri gate 1 is schedule to open today. Beware of trees and bushes. Have a nice day.

| - | 07:33 | - | - | pookmark |