Avalanche Bulletin
更新日時: 2025/03/19 06:30
Myoko
Alpine Fair
Treeline Fair Keep in mind that the wind and snow will intensify in the future.
Below Treeline Fair Keep in mind that the wind and snow will intensify in the future.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Pay close attention to wind and snow intensification during the day. Snowfall accompanied by wind at higher temperatures can quickly form unstable slabs. Poor visibility reduces situational awareness of surrounding changes and terrain. Maintain good communication with your companions and use careful route setting. In addition, stormy snow makes glide cracks difficult to identify. Be vigilant at the turn of the slope.
Avalanche Problem
ストームスラブ Storm slab
Watch out for unstable slabs on very steep slopes.
概要
Avalanche
Numerous avalanches of storm slabs of size 1-1.5 were reported yesterday (18th) in the below treeline. These avalanches were caused by morning safety control at the ski area. Also, many snowballs were observed on steep slopes that were exposed to strong sunlight.
Snowpack
The previous stormy snow (20-40 cm), which began with the passage of a low pressure system on March 16, proceeded to settle rapidly with yesterday's clear skies. While the snow has dried up on the north side at higher elevations, Melt-Freeze crusts are forming on the steep slopes that are exposed to strong solar radiation. Then, from early today, snowfall associated with the passage of a low-pressure system began again, and will change to snowfall due to a winter pressure pattern. The Japan Meteorological Agency is forecasting 20 cm of snowfall by this evening.
Weather
The Japan Meteorological Agency is forecasting northwest winds, later westerly winds, snow or rain, and daytime highs of 5 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -3 °C (as of 4:45 a.m.), with 3 cm of snow having fallen in the past 12 hours.
