Avalanche Bulletin

更新日時: 2022/02/05 06:00

Myoko


Alpine Fair


Treeline Fair


Below Treeline Fair


信頼度:○ good □ Fair △ Low

Travel and Terrain Advice

It is a day when avalanche conditions rise during the day. If you are inexperienced, fresh snow in the ski area is a fun day. If you are entering the mountain, pay attention to the intensity of snowfall and wind to find out the instability it creates. When you have poor visibility, it is difficult to recognize the dangers above you. Check the route on the topographic map and ask for a stop or rest in a safe place. Choose a place where there is no “terrain trap” at the end of the slope to be glided on, and don't forget the group management to watch over the slippage of your friends in a safe place. The weather tends to deteriorate clearly, so make an action plan that takes that into account.

Avalanche Problem

ストームスラブ Storm slab


ベース画像

概要

Avalanche


Yesterday (4th), multiple point avalanches of size 1 with weak coupling force that recently fell on very steep terrain have been observed.

Snowpack


On top of the snow with low cohesion and low density observed yesterday, stormy snow from the wee hours is resting. In such cases, the snow structure tends to be in an unstable state. It is necessary to pay close attention to its instability, especially in places where yesterday's daytime temperature rise and wind were weak.

Weather


The Meteorological Agency predicts northwestern winds, slightly stronger snow, and a maximum temperature of 1 degree (elevation 13 m) for the Joetsu region of Niigata prefecture. At Myoko Sasagamine (elevation 1310m), the temperature is -9℃ (as of 5:00), and 24 cm snowfall has been observed in the past 12 hours. The Japan Meteorological Agency has announced a heavy snow advisory (12 hours maximum snowfall 60 cm) for the mountains of Myoko City, Joetsu City, and Itoigawa City at 4:31 on the 5th with a high possibility of switching to a warning in the future.

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