Avalanche Bulletin
更新日時: 2025/02/12 04:30
Kagura Tanigawa Hotaka
Alpine Low No information on wind effects or snowfall amounts
Treeline Low
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Beware of triggering storm slabs on steep slopes; there was a report of a very large avalanche observed in the Tanigawadake area on the 10th. Be careful of triggering in open areas with few trees or where the slope changes abruptly. Until bonding progresses, we recommend that you stay on the ridge or in areas with slopes that are less steep. Also, even if you are in an area with a loose slope yourself, watch out for avalanches from large avalanche start zones overhead. Be aware of triggered wind slabs just below the ridge where bonding has not progressed due to yesterday's strong winds. When regrouping after skiing, be sure to remove the avalanche terrain and try to do so in the safest place possible, such as on top of the ridge.
Avalanche Problem
ストームスラブ Storm slab
Beware of steep slopes. At higher elevations and with greater snow cover, the size of avalanches that occur will be greater.
ウインドスラブ Wind slab
Beware of extremely steep slopes just below the ridge.
概要
Avalanche
Yesterday (11th), there were no reports of effective observations due to poor visibility caused by strong winds. There was a report of a large slab avalanche (size 3) observed in the Tanigawadake area on the 10th.
Snowpack
The snowfall from this stormy weather was more than 200 cm in many places, and it is gradually settling. The low-density, large-grained snowfall is deeply buried by this snowfall, so care must be taken in bonding. Due to yesterday's strong winds, wind slabs are expected to form just below the downwind ridge line. Crusts are deeply buried on the southerly slopes and bonding should be noted.
Weather
As of 4:00 pm, the temperature at Amedas Fujiwara was -7.3°C. Around the area, snowfall continued throughout the day with wind effects. Around 1,300 m elevation, about 20 cm of snow fell during the day yesterday. The Japan Meteorological Agency is forecasting clear skies and cloudy skies before noon, with some rain and snow at night in the foothills of northern Gunma Prefecture, as a high-pressure system moves south of Japan and a low-pressure system with a front moves into the Sea of Japan.
