モイワ山麓5時-7度降雪15cmふきだまり発達　モイワ見返り800m-10度西6.1m雪庇ふきだまり発達　ヒラフ花園800m-10.2度北北西5.9m突風20m雪庇ふきだまり発達　日本海弁慶岬西北西18m　神威岬南西17m気圧1015hPa波高2.8m、

西の高気圧側面の風強く海上波高は再び上昇、標高1000m以上では西寄りの風雪が強く雪庇ふきだまりが発達。平均風速は6m程度だが20m/sを越える突風が時折吹くためスラブ発達は一様ではない。標高800m以上風下側に堆積した風成雪スラブの厚さは100cm、圧密安定しておらず構造不安定が継続、稜線の風下側、雪庇斜面の雪崩リスクは高い。笹が見えていても破断する危険があるので安易に滑ってはならない。吹雪のふきだまり斜面は風が落ちて圧密安定(層序安定)するまで表層雪崩を起こしやすい。多くの事故は風雪時の谷や風下の側壁で起こっている。これを常識とすれば事故に遭わずにすむ。風の雪は結晶が硬く板が走らない。また面白いが板が刺さりやすい。今怪我をすればシーズンを棒に振る。風が落ちれば山は良くなる。無理は禁物、良い一日を。

Moiwa base 5am: -7℃, 15cm snowfall with snowdrift developments. Moiwa Mikaeri 800m: -10℃, W6.1m/s, cornices and snowdrifts developments. Hirafu Hanazono 800m: -10.2℃, NNW5.9m/s with 20m/s gusts, cornices and snowdrifts developments. Coastal data: Benkei cape WNW18m/s, Kamui capeSW17m/s, 1015hPa, 2.8m waves. 

The wind is strong on the edge of the High Pressure system in the west and is making the wave height rise again. Westerly wind remains strong above 1000m and is developing cornices and snowdrifts. Although the average wind speed is around 6m/s, intermittent 20+m/s gusts are blowing. The formation of the slabs aren’t uniform. Wind-drift snow slabs in the leeward slopes above 800m have reached 100cm thickness and are yet to consolidate. They are still structurally unstable and the avalanche risk in leeward slopes under the ridge lines and cornices is high. Slides are likely to occur even if bamboo-grass are visible. Do not ride those slopes carelessly. Surface slab avalanches are highly likely to occur in slopes with heavy deposits of snowdrifts during storms until the snowpack consolidates and stabilizes. Most of the accidents occur in gorges and leeward slopes during storms. Keep this in mind as a common sense and you will avoid most accidents. Wind-affected snow crystals are firm and have a lot of friction. Still fun to ride, but the nose tends to dive down. Ride carefully and avoid ruining your season with a careless injury. The conditions will improve once the wind settles down. Do not push it too hard for now. Have a nice day.

出典 Source：気象庁 JMA website (www.jma.go.jp/bosai/weather_map/)