霧雨に濡れる山頂 冷えに備え万全な装備を

In the morning, light drizzle persists, with the summit temperature at 3.8℃, feeling like -0.2℃. The temperature difference between the summit and base is 3.8℃, indicating a significant chill as elevation increases. The ground is wet to muddy due to the drizzle. Rocky sections will be slippery, requiring extra caution with footing. While the weather is expected to improve in the afternoon, becoming mostly clear by 3 PM and perfectly clear by 6 PM, continued vigilance against wind chill is essential.

Tomamu Summit, home to the Unkai Terrace, will offer poor visibility due to the drizzle and low temperatures, making views unlikely. Gusts of 11.4 m/s have been observed, further lowering the apparent temperature in exposed areas. Particularly on wind-prone slopes such as the North Burn and Riverside, getting wet significantly increases the risk of hypothermia.

Although no significant alerts were detected by the automatic risk assessment, the summit's apparent temperature is below freezing, and getting wet from drizzle heightens the risk of hypothermia. Waterproof and breathable rainwear (jacket and pants) is mandatory. For layering, choose a quick-drying base layer and a mid-layer of fleece or a thin down jacket for effective temperature regulation through frequent adjustments. Wear waterproof trekking shoes to handle the slippery terrain.

In the evening, the skies will clear, and winds will subside, but temperatures will drop to between 3℃ and 1.4℃ overnight. If continuing activities, be aware of the cold, wet ground, though not freezing, and ensure adequate cold weather protection. Remember to carry sufficient water and snacks.