ニセコなだれ情報 第107号 Niseko Avalanche Info No.107

Date:
March, 22nd 2019

 山麓6時0度湿雪降雪わずか、モイワ800m-4.1度西北西6.24m/s、アンヌプリ1000m積雪深250cm、ヒラフ1000m-6.8度南東2.10m/s、アメダス倶知安0.1度西北西6.0m/s積雪深91cm、弁慶岬北13m/s、神威岬北北東9m/s気圧999hPa波高2.2m、

 

低気圧通過後に寒気が入り標高700m以上はマイナス気温で弱い風雪。量は少ないが風下にふきだまりが発達する見込み。昨日の暖気で標高700m以下の亀裂が更に広がり、あちこちで崩れ始めている。水野の沢では標高800m付近からの全層雪崩の危険が高まっているためボトムのリフトが止まっている。近くを通る時は規制線に従い上をよく見て滑ること。

山は春に移行しているが低気圧通過による気温差が激しくふきだまりも出来やすい。急激に量を増やすふきだまりは雪崩の危険があるので風下斜面では注意。標高1000m付近からの大規模な雪崩の危険を避けるため谷底にいないほうが良い。沢の側壁からの小規模な雪崩に注意。上空は風が強い。ゲート開閉は未定。良い一日を。

 

Mountain base 6am: 0℃, slight wet snowfall. Moiwa800m: -4.1℃, WNW6.24m/s, Annupuri1000m: 250cm snow depth. Hirafu1000m: -6.8℃, SE2.1m/s, Kutchan weather station: 0.1℃, WNW6.0m/s, 91cm snow depth. Benkei cape: N13m/s, Kamui cape: NNE9m/s, 999hPa, 2.2m waves.

 

Cold air is flowing in as the low-pressure passed. The temperature remained below freezing level and light snowfall persists above 700m elevation. The amount may not be much, but snowdrifts are expected to develop in leeward slopes. The cracks became bigger in lower elevations and small glide avalanches are occurring frequently. A chair-lift operation is suspended in Niseko Village due to rising risk of large scale glide slide from 800m Mizuno no sawa. Pay attention to what’s above you when riding nearby.

The mountain is shifting to Spring, however temperature is still unstable and a passing low-pressure can generate drastic developments of snowdrifts. Rapidly developed snowdrifts are the most unstable and can trigger a slide easily. Always remain prudent when riding leeward slopes with snowdrift developments and stay away of valley bottoms to avoid being caught in large avalanche. Beware also of small slides from the gullies sidewalls. The wind stays strong in higher elevation. Have a nice day.



For more information visit Niseko Avalanche Information.

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