Avalanche Bulletin
更新日時: 2025/02/20 04:30
Kagura Tanigawa Hotaka
Alpine Low No information on snowfall and wind effects
Treeline Fair
Below Treeline Fair
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Dangerous avalanche conditions due to heavy snowfall. Be careful of triggering storm slabs that are forming on steep slopes. We recommend that you stay below treeline on slopes and on ridges. Even if you are on a loose slope, watch out for avalanches from large avalanche start zones overhead. When reassembling after skiing, please try to leave the avalanche terrain and stay as close to the ridge top as possible to ensure safety. Stormy weather is forecast to continue. Please be aware of changing conditions due to snowfall and wind-driven snow movement.
Avalanche Problem
ストームスラブ Storm slab
Beware of open slopes with few trees and sudden changes in slope
概要
Avalanche
Several avalanches (size 1.5) caused by storm slabs were observed yesterday (19th) due to natural occurrence on extremely steep slopes below treeline.
Snowpack
Snowfall in this stormy weather is more than 150 cm. Attention should be paid to bonding in the upper part of the snowfall. Crusts formed on the southerly direction and on all slopes below about 1400m and were buried by the snowfall from noon on the 17th. Low-density snowfall may have buried the boundary surface, and caution should be exercised in bonding. The middle to lower layers of snowfall in the lower part of this crust are settling and bonding.
Weather
As of 4:00 pm, 42 cm of snow had fallen in the past 24 hours at 700 m elevation at AMeDAS Fujiwara, and 74 cm had fallen near 1300 m. Snowfall is still continuing in the surrounding areas. The Japan Meteorological Agency is forecasting cloudy skies and snow until dawn in the foothills of northern Gunma Prefecture due to a winter pressure pattern and the influence of a pressure trough.
