Avalanche Bulletin
更新日時: 2023/03/22 05:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is the "spring cycle" where snow cover intensity varies greatly between morning and mid-day. Climbers and skiers alike should be aware of slip drop in the morning. And notice that the intensity of the snowpack surface layer decreases as the temperature rises and the solar radiations. If you choose the right time of day and slope, you can safely enjoy comfortable granular snow. Snowmelt at lower elevations is progressing. Be on the lookout for glide avalanches and snow block collapses. Also, gullies are cracking and snow bridges are becoming brittle. There are more diverse hazards at lower elevations. Please communicate with your fellow skiers and avoid hazards.
Avalanche Problem
点発生湿雪雪崩 Wet Loose snow
Higher temperatures than yesterday are forecast. Ratings are as of this morning.
全層雪崩 Glide slab
At the foot of the mountain, the temperature was about plus 6 degrees Celsius last night, even at midnight. Melting snow is progressing. We also need to be vigilant for leftover snow blocks.
概要
Avalanche
Yesterday (March 21), numerous size 1 wet loose snow avalanches were observed in all aspects.
Snowpack
Snowpack is in a Melt-Freeze cycle, except on the northern slopes at higher elevations. The surface layer of snowpack is repeatedly frozen at night and Melt-Freezed during the day. As a result, the surface layer of snow changes to granular snow with large particle sizes. In addition, the entire snowpack is gradually warming up, and all layers are moving in the direction of isothermalization.
Weather
The Japan Meteorological Agency is forecasting southerly winds, clear skies, morning and evening, cloudy skies, and a high of 22°C (418 m elevation) for northern Nagano Prefecture. At Amedas Hakuba (elevation 703 m), the temperature is 4.3°C (as of 5:00). Yesterday, at Amedas Hakuba, a maximum temperature of 15.5°C was recorded (at 14:00).
