雨と濃霧に包まれる谷川岳 視界不良に警戒

Tanigawadake summit is currently experiencing light rain with a temperature of 12.9°C, feeling like 12.6°C. Humidity is very high at 98%, and visibility is limited to 2.9km. The base is also under heavy drizzle, with a significant temperature difference of 7.5°C from the summit, indicating a rapid drop in temperature with elevation gain. Light rain is expected to continue until around 9 AM, followed by cloudy skies in the afternoon, but light drizzle will return from evening into night. Temperatures will remain between 12-13°C throughout the day.

Under these conditions, the ground is entirely wet with many muddy sections. Exposed rocky areas will be slippery due to the wetness. The risk of route loss due to dense fog is paramount, especially on the ridge leading from Toma-no-Mimi to Oki-no-Mimi twin peaks, where navigation errors can easily occur in poor visibility. Carrying a topographic map, compass, and GPS, and frequently confirming your current position, is essential.

The effective temperature remains low, and exposure to rain significantly increases the risk of hypothermia. Ensure you wear a quick-drying base layer, a fleece mid-layer, and a fully waterproof and breathable rain suit for your outer layer. Waterproof gloves and a knit hat are also mandatory. While wind speeds are generally light, gusts can reach up to 12.3m/s in the afternoon, contributing to heat loss. The likelihood of thunderstorms is low, but be prepared for sudden weather changes. Although no significant alerts were detected by the automated risk assessment, considering the poor visibility and risk of hypothermia, these conditions are challenging for beginners and less experienced hikers. Even experienced mountaineers must exercise extreme caution.