午後は弱い霧雨の予報。体感は氷点下まで下がる

As of 8 AM, the summit of Mt. Chokai is cloudy with an air temperature of 5.4°C and a felt temperature of 1.8°C. There is a significant temperature difference of 11.6°C compared to the base, indicating a rapid drop in temperature with altitude. The daytime forecast suggests a transition from partly cloudy skies to light drizzle around 3 PM, with an 80% chance of precipitation. Carrying full rain gear is essential.

The felt temperature during the day will hover around 0°C to 2°C with winds around 3 m/s. However, strong gusts exceeding 12 m/s could cause the felt temperature to drop to near minus 10°C. Particular caution is advised on the long ridge routes exposed to strong winds and dense fog from the Sea of Japan, as this significantly increases the risk of hypothermia. The rocky areas around Shinzan will become slippery with the expected drizzle, increasing the risk of falls, so careful footing is crucial. Given that snowfields persist on Mt. Chokai until autumn, consider carrying light crampons or microspikes for traction on any remaining snow.

For layering, wear a quick-drying base layer, a fleece or light down jacket as a mid-layer, and a waterproof-breathable shell as an outer layer, adjusting frequently to regulate body temperature. Gloves and a hat are also necessary. Although the forecast indicates a low risk of thunderstorms, as an active volcano, be prepared for the possibility of sudden lightning storms and descend to a safe location immediately if thunder is heard. Temperatures will drop to around 3°C overnight, so maintain adequate cold weather protection.