午後から霧雨と視界不良。行動は慎重に

Current conditions at Hakuba-dake summit are mostly clear with excellent visibility over 20km and a temperature of 10.1°C. There is a 10.1°C temperature difference from the base, indicating cooler conditions higher up. This morning offers favorable climbing conditions. However, conditions will shift significantly around noon. Drizzle is forecast to begin by 12:00, continuing with 100% precipitation probability until 15:00. The ridge lines will likely be enveloped in dense fog, severely reducing visibility.

This combination of drizzle and poor visibility demands extreme caution, especially when traversing the Daisekkei (Great Snow Valley). This section typically requires light crampons even in summer, and the wet snow and rock surfaces will increase the risk of slipping. Be vigilant for falling rocks. Ground conditions will be dry on exposed rock ridges in the morning but will become wet and slippery in the afternoon.

The perceived temperature at 2891.43m will hover around 10°C. However, with 95% humidity and drizzle, there is a high risk of hypothermia if clothing becomes wet. To mitigate this risk, essential layering includes a moisture-wicking base layer, a fleece mid-layer, and a waterproof-breathable shell jacket and pants. Light crampons and rain gear are mandatory.

While there are no significant risks of thunderstorms or strong winds, utmost care is needed due to poor visibility and wet ground conditions in the afternoon. For any afternoon activities, consider re-evaluating your plans and proceed with extreme caution. Precipitation will cease by evening, but temperatures will drop to around 9°C. Ensure adequate cold weather protection for any night-time activities.