Avalanche Bulletin
更新日時: 2023/03/06 05:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Good
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
This is a "spring day" when slopes that are hard frozen in the morning lose strength due to high daytime temperatures and sunny slopes, resulting in loose snow avalanches caused by wet snow. Try to notice situations where the snow surface loses strength. Wet snow is so heavy that even small avalanches can easily scoop underfoot. A "terrain trap" lower down the slope can have serious consequences. Also, very hard old snow is exposed on the ridge tops and other areas. Be careful of slipping and falling. Slopes with glide cracks at lower elevations are unstable. Watch out for leftover snow blocks on cliff-like terrain. Bring sunglasses and sunscreen and have a good spring day.
Avalanche Problem
点発生湿雪雪崩 Wet Loose snow
Beware of high daytime temperatures and solar radiation
全層雪崩 Glide slab
Stay away from slopes that already have glide cracks. Also, be wary of leftover snow blocks that have fallen off.
概要
Avalanche
Yesterday (March 5), many wet loose snow avalanches were observed in all directions at very low elevations.
Snowpack
Yesterday, high temperatures were recorded at 7.5°C (13:00) at AMeDAS Hakuba. This, combined with strong solar radiation, caused numerous loose snow avalanches Below Treeline. Hard old snow is exposed on ridges. On the north side of the higher elevations, the snow is still dry. As of yesterday, the snow surface was in good condition with dryout occurring where moisture is being removed by radiation.
Weather
The Japan Meteorological Agency is forecasting northerly winds, clear skies, morning and evening, cloudy skies, and a high of 13°C (418 m elevation) for northern Nagano Prefecture. At AMeDAS Hakuba (elevation 703 m), the temperature is -2.4°C (as of 5:00 am), with no new snowfall in the past 12 hours.
