Avalanche Bulletin
更新日時: 2023/03/04 05:30
Hakuba
Alpine Fair
Treeline Fair
Below Treeline Fair Beware of high daytime temperatures and solar radiation
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Those seeking higher elevations should be on the lookout for wind slabs formed by northwest winds. At the same time, beware of slips on hard slopes exposed on the ridge. On slopes where wind slabs have not formed, the instability of the snowpack is on the way to being resolved, but avalanches can still be triggered where the terrain is too convex or isolated terrain is too extreme to support the snowpack, and should be avoided. Higher temperatures than yesterday are forecast for today. Be on the lookout for wet snow avalanches on open slopes to the south. The mountain is expected to be crowded, so please manage your group wisely using safe areas while also paying attention to the movements of other groups. Have a good day.
Avalanche Problem
ウインドスラブ Wind slab
点発生湿雪雪崩 Wet Loose snow
Beware of high daytime temperatures and solar radiation
概要
Avalanche
Yesterday (March 3), several skier-triggered size 1 slab avalanches were reported in all elevation zones. Snowballs were also reported on steep slopes exposed to strong solar radiation.
Snowpack
As of yesterday (March 3), slabs(20-30 cm) formed by snow from the previous day were reacting to human stimuli in certain terrains. As of yesterday, there were two instabilities, one within the new snow and the other at the boundary with the old snow. These instabilities are slowly in the direction of resolution. On the other hand, very strong winds have been blowing in Alpine since yesterday afternoon, and the wind slab formation is progressing.
Weather
The Japan Meteorological Agency is forecasting northerly winds, clear skies, and occasionally cloudy skies with a high of 10°C (418 m elevation) for northern Nagano Prefecture. At Amedas Hakuba (elevation 703 m), the temperature is -5.7°C (as of 5:00), with no new snowfall in the past 12 hours.
