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ニセコなだれ情報 第63号 Niseko Avalanche Info No.63

山麓6時-7度降雪12時間15cm夜半からおだやか、モイワ800m-8.6度北0.7m12時間降雪20cmふきだまり発達なし、見返り分岐風弱く-9度ふきだまりやや発達、アンヌプリ1120m積雪深220cm、ヒラフ山頂-13度積雪20cmふきだまり発達おだやか、水野の沢-9.99度風弱く山麓積雪深165cm降雪12時間6cm、アメダス寿都-3.4度風弱く積雪深47cm、倶知安-7.1度風弱く積雪深163cm、日本海弁慶岬東北東4m/s、神威岬北北東2m/s気圧1012hPa波高1.2m、

 

気圧の傾きなく海上、山ともに穏やか、風雪は5日昼に収束しその後標高800m付近で午後から3時間降雪15cmの降雪。風の影響は小さくこの雪のスラブの程度は小さい。全体の雪崩リスクは低い。各山頂ゲートは朝から開けられる見込み。パトロールの指示に従うこと。雪庇斜面やノールを切ってはならない。同じラインのトラバースを繰り返すとスラブを壊し、深部層を刺激して雪崩を起こす可能性がある。大沢や鉱山の沢では注意。

 

毎回繰り返して恐縮だが沢底は滑らないほうが良い。側壁急斜面や谷上部からの雪崩の危険が常にある。同時滑走をしてはならない。雪崩が起これば仲間が皆埋まりセルフレスキューができない。久しぶりに雪は良い。ロープをくぐることはここでは厳しく禁止されている。ルールの尊重を。

 

Mountain base 6am: -7, 15cm snowfall in 12hours, calm weather overnight. Moiwa800m: -8.6, N0.7m/s, 20cm snowfall in 12hours, no snowdrift development. Mikaeri Junction: calm, -9, small snowdrift development. Annupuri1120m: 220cm snow depth. Hirafu peak: -13, 20cm snowfall, snowdrifts developments and calm. Misuno no sawa: -9.99, calm, 165cm snow depth at mountain base, 6cm snowfall in 12hours. Suttsu weather station: -3.4, calm wind, 47cm snow depth, Kutchan -7.1, calm wind, 163cm snow depth. Coastal data Benkei cape ENE4m/s, Kamui cape NNE2m/s, 1012hPa, 1.2m waves.

 

The atmospheric pressure gradient is flat and the weather is calm in the mountain and on the ocean. The snowfall settled down around noon yesterday, but another set came in and dropped 15cm of fresh snow in 3h. There were no wind influence during that snowfall and the new snow is not forming notable slabs. The overall avalanche risk is low. All peak gates are scheduled to open from the morning. Please follow the patrol’s instructions. Do not cut across slopes under cornices and knolls. Traversing over and over on the same slope could stimulate deeper weak layers and trigger a slide. Special caution is required in O-sawa (Annupuri bowl) and Kozan no sawa (Back bowl).

 

We would like to repeatedly remind that it is strongly advised not to ride the bottom of the valleys. Hazards of slides striking from higher slopes are ever-present. Do not party ride in suspicious terrains. One slide could take in the whole group. The snow condition is excellent today. Ducking ropes is strictly prohibited in Niseko. Please show respect to the local customs. They may be different from your country, but as the proverb says, "when in Rome, do as the Romans do."

We appreciate your understanding. 

| - | 07:50 | - | - | pookmark |