Avalanche Bulletin
更新日時: 2022/03/11 06:00
Myoko
Alpine Good
Treeline Good
Below Treeline Good 日中の昇温と日射の影響に留意
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Southerly winds have entered and a large temperature rise is forecast, so please pay attention to the changes in the snow cover surface layer during the day. Snowballs rolling on the snow surface are a telltale sign of a decrease in snow strength. Wet snow is so heavy that it is easy to scoop up your feet even if it is very small. When traversing steep slopes, etc., think about “terrain traps” below. Also, stay away from slopes with glide cracks, where there is a risk of all-layer avalanches. You can enjoy dry snow on the high elevation north side and rough snow on the south side. Have a nice day in spring
Avalanche Problem
全層雪崩 Glide slab
標高が低く、グライドクラックが既に入っている斜面。
点発生湿雪雪崩 Wet Loose snow
日中の昇温と日射で危険度は上昇。
ウインドスラブ Wind slab
概要
Avalanche
Yesterday (10th), a large number of point-occurring wet avalanches of size 1-1.5 were observed in the below treeline. Surface-generated avalanches of size 1-1.5 have also been observed on the leeward side of the high elevation ridge line.
Snowpack
At low altitudes, snow in the snow cover surface layer enters a “spring cycle” in which snow melts and freezes repeatedly. Today's concerns are the magnitude of the daytime temperature rise (forecast to rise 5℃ or more from the previous day) and the effects of solar radiation. In places with low elevations, regardless of direction, the strength of snow on the snow cover surface layer will decrease in the future, and wet point-generated avalanches will likely occur. In addition, glide cracks are also growing, and snow blocks rest in unstable conditions on the extreme terrain of the valley ridges. On the other hand, snow is still dry on the northern slopes near the forest limit.
Weather
The Japan Meteorological Agency predicts southern winds, later, westerly winds, sunny, sometimes cloudy, and a high temperature of 16 degrees Celsius (elevation 13 m) for the Joetsu region of Niigata prefecture. The temperature is -2℃ (as of 5:00) at Myoko Sasagamine (elevation 1,310m).
