Avalanche Bulletin
更新日時: 2025/01/24 06:00
Myoko
Alpine Low Snowfall amount unknown
Treeline Fair Depends on the amount of snowfall
Below Treeline Good Keep an eye on rainfall
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
In areas where elevation is high and some amount of snowfall has occurred, please keep in mind the bonding condition of the new snow with the old snow. In the adjacent Hakuba Mountain area, poor boundary conditions were observed as of yesterday. In addition, at lower elevations, this is a day of increased glide crack movement due to rainfall. Stay away from slopes that already have cracks. When visibility is poor, it is harder to notice slope changes. Numerous glide cracks have also been observed below treeline, so please be careful when setting your run lines.
Avalanche Problem
ストームスラブ Storm slab
Assessment only for areas that have had snowfall since yesterday.
全層雪崩 Glide slab
Light rainfall is forecast at lower elevations. Watch for rainfall amounts. Stay away from slopes that already have glide cracks.
概要
Avalanche
Yesterday (23rd), several size 1-2 glide avalanches were observed on the southern slope of the below treeline. Numerous snowballs were also reported.
Snowpack
Weak snowfall associated with a pressure trough began yesterday afternoon on the northwest side of the Myoko Mountains area. The amount of snowfall is estimated to be 10-20 cm. In other areas, no snowfall has been confirmed at this time. The overall snowpack in the mountain area is characterized by the formation of Melt-Freeze crusts in the south and settled old snow in the north at higher elevations. No major problems have been observed in the mid-levels of snow cover at the treeline and below treeline.
Weather
The Japan Meteorological Agency is forecasting northwest winds, cloudy skies, rain or snow in the morning and evening, and daytime highs of 7 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature is -4 °C (as of 4:45 a.m.), and 1 cm of snow has fallen in the past 12 hours.
