弱い雨と深い霧。視界不良で慎重な行動を

Mt. Oyama currently experiences weak rain and dense fog. The summit temperature is 8.4°C with a wind chill of 5.9°C, and 99% humidity, leading to complete saturation. Visibility is less than 1km, making footing extremely difficult. The route from Murodo to Ichinokoshi and the summit of Mt. Oyama features wet, slippery rock faces, increasing the risk. Particular caution is advised on the steep ascent from Ichinokoshi, where there is an elevated risk of rockfall.

Full waterproof and breathable rain gear is essential for today's activities. Layering should include a quick-drying base layer, an insulating mid-layer such as fleece, and a waterproof-breathable outer shell to protect against rain and wind. With a wind chill of 5.9°C, getting wet significantly raises the risk of hypothermia. Always wear insulated layers during breaks and maintain energy levels with adequate food. Gusts reached 14.9m/s but are not severe enough to impede movement. No signs of lightning are currently detected.

Murodo, at the mountain base, is 12°C with a 10.8°C wind chill, a 3.6°C difference from the summit. Be aware of this temperature drop as you ascend. Light drizzle will persist through the morning, with precipitation temporarily stopping around 3 PM, though visibility will improve slowly. Light drizzle may return in the evening, and a significant improvement in weather is not expected until early tomorrow morning. Today's ascent demands extreme caution due to poor visibility and wet terrain; do not push beyond your limits.