Avalanche Bulletin
更新日時: 2023/11/29 07:00
Tateyama
Alpine Good Conditions require careful route selection, but be aware that avalanche terrain is difficult to recognize due to poor visibility.
Treeline
Below Treeline
信頼度：○ good □ Fair △ Low
Travel and Terrain Advice
Conditions require careful route selection, but visibility is poor and avalanche terrain is difficult to recognize. Watch out for newly forming storm slabs on steep slopes; human-triggered avalanches continued through the 23rd. Be aware that this instability is localized, hard to find, and persistent. Beware of triggering from extremely steep slopes with thin snowpack. The slab and bed surface are hard, which allows the fracture line to spread significantly and increase the size of the avalanche. It is recommended to follow the action principle of reducing the time spent in avalanche start zones, tracks, and runout zones (avalanche terrain). There are many exposed "terrain traps" such as rocks and gullies that can increase the damage of even small avalanches.
Avalanche Problem
ストームスラブ Storm slab
Beware of triggering on steep slopes.
持続型スラブ Persistent slab
Beware of triggering from extremely steep slopes with thin snowpack.
概要
Avalanche
No reports of new avalanches observed yesterday (28th) due to poor visibility.
Snowpack
At higher elevations, there is expected to be at least 50-60 cm of new snowfall that began yesterday. The old snow is settling, but bonding is uncertain due to buried crusts on the steep southerly slopes. The lower part of the snowpack is settling well and bonding is good, but there is still instability due to local faceting, and avalanches have been triggered from areas with thin snowpack until the 23rd. Caution is needed as new snowfall load is being applied here.
Weather
The temperature at 3000m as of 6:00 am is -14.0℃. Around the Murodo terminal, there was 30-40 cm of wind-driven snowfall by morning, and snowfall is still continuing with wind. The Japan Meteorological Agency is forecasting a winter pressure pattern, with rain at the foot of the mountains, accompanied by thunderstorms in some areas, and snowfall in the mountains late at night.
