Avalanche Bulletin
更新日時: 2024/01/19 05:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Fair Be on the lookout for glide avalanches.
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is a mixed day of winter and spring. Those gaining elevation should carefully check the bonding of new and old snow. During the ascent, try to use small, safe, convex terrain, etc., to step in or make ski cuts. Even if it feels relatively stable, starting the day on smaller slopes is a good option. This is because snow changes quickly today and tends to stabilize over time. Please choose simple slopes and use safe areas for smart group management. At lower elevations, be alert for slopes with glide cracks. This one will require vigilance throughout the day. Have a good day.
Avalanche Problem
ストームスラブ Storm slab
It has been snowing on the main ridge since yesterday with relatively light wind conditions (average 10 m/s, maximum 15 m/s). This has led to a high probability of dangerous slabs forming just below the ridge, i.e., in the vicinity of your choice of drop points. Please avoid extreme, convex, or isolated shapes where the snowpack is likely to be unstable.
全層雪崩 Glide slab
Due to yesterday's rainfall, the ski patrol is reporting an expansion of glide cracks. The same temperature increase is forecast for today as yesterday, so please stay away from slopes with glide cracks.
概要
Avalanche
Due to poor visibility and stormy weather yesterday (18th), the number of people entering the mountain was limited and no avalanche bulletin was received.
Snowpack
Yesterday (18th), at the foot of the mountain, it rained weakly in the morning and then heavier in the afternoon. The freezing level was around 1500-1700 m, and snow fell throughout the day near the treeline. Since the Hakuba AMeDAS recorded about 20 mm of rainfall yesterday, it is estimated that 20-30 cm of snow had fallen by this morning at higher elevations. This new snow is on top of thin Melt-Freeze crusts formed by the clear skies on the 17th on the steep south-facing slopes, and old wind slabs in other areas.
Weather
The Japan Meteorological Agency is forecasting northerly winds, clear skies, and a daytime high of 6 °C (418 m elevation) for northern Nagano Prefecture. At Amedas Hakuba (elevation 703 m), the temperature is 1.9 °C (as of 5:00 a.m.).
