Avalanche Bulletin
更新日時: 2025/02/05 06:30
Myoko
Alpine Fair
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Dangerous avalanche conditions. Watch out for storm slabs that form on steep slopes and wind slabs that form from wind-moved snow. It is important to pay attention to the meeting point of the slopes and choose a location with a large margin of safety. Glide cracks that have formed previously are harder to spot. Do not feel safe in the woods and be alert to where the angle of the slope changes. Inexperienced skiers are advised to ski within the ski area.
Avalanche Problem
ストームスラブ Storm slab
Be alert for storm slabs that have formed on steep slopes.
ウインドスラブ Wind slab
Winds are stronger than yesterday. Look for wind effects at lower elevations. The local danger level will increase there.
概要
Avalanche
Numerous storm slab avalanches of size 1-1.5 were reported yesterday (4th) at the ski area morning safety control. Numerous shooting cracks and remote triggers were also reported where winds were present. Size 1 loose snow avalanches of size 1 were also reported on very steep slopes.
Snowpack
Snowfall that began yesterday (4th) has reached 50 - 100 cm in the northern part of Myoko. Due to this heavy snowfall, numerous avalanches have been reported in vulnerable areas within the fresh snow. At very low elevations, yesterday's snowfall began with rainfall, so wet loose snow avalanches have also been observed as of this morning. At this time, only limited information is available on conditions at the interface between new and old snow, and there is uncertainty.
Weather
The Japan Meteorological Agency is forecasting winds out of the west, slightly stronger, snow, and a daytime high of 2 °C (13 m elevation) for the Joetsu region of Niigata Prefecture. At Sasagamine, Myoko (elevation 1,310 m), the temperature was -10 °C (as of 5:45 a.m.), with 16 cm of snow having fallen in the past 12 hours and 39 cm in the past 24 hours. The Niigata District Meteorological Office (NDMA) is forecasting 80 cm of snowfall along the mountains of the Joetsu region at 5:40 a.m. on February 5 in the 24-hour period ending at 6:00 a.m. on February 6.
