Avalanche Bulletin
更新日時: 2025/02/25 04:30
Kagura Tanigawa Hotaka
Alpine Low No observational information
Treeline Low
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Beware of induced storm slabs that form on open steep slopes with few trees or where there is a sudden change in slope. Even if you find yourself in a forested area with a moderate slope, it may be a runout zone of large avalanche terrain. Consider the possibility of avalanches from large avalanche start zones that exist in the alpine area overhead. When regrouping after skiing, be sure to leave the avalanche terrain and try to do so in the safest place possible, such as on a ridge top.
Avalanche Problem
ストームスラブ Storm slab
Beware of open steep slopes with few trees and sudden changes in slope
ウインドスラブ Wind slab
Be careful of the steep slope just below the ridge.
概要
Avalanche
Yesterday (24th), there were reports of a number of avalanches (size 1) observed on steep slopes, both human-triggered and naturally occurring, caused by storm slabs.
Snowpack
The snowfall from this storm is settling, but attention should be paid to bonding within the new snowfall on top of the snowfall. Due to strong winds at midnight, a blowdown is expected to form just below the ridge. Crusts have formed on the southerly direction and on all slopes below about 1400m, deeply buried by snowfall since noon on the 17th. Low-density snowfall may be buried on the boundary surface, and bonding should be kept in mind. The middle to lower layers of the snowpack at the bottom of this crust are settling and bonding.
Weather
As of 4:00, there has been no increase in snowfall at Amedas Fujiwara at 700 m elevation, but there has been about 2-3 cm of snowfall in the surrounding area and it is still falling. At higher elevations, strong northwesterly winds were observed late at night. The Japan Meteorological Agency is forecasting clear skies and cloudy mornings and evenings in the foothills of northern Gunma Prefecture, as the area will be covered by high pressure, but will be affected by an overhead pressure trough and moist air.
