低い雲に覆われ視界不良。穏やかな風だが行動は慎重に

Currently, the summit area of Zao mountain range is cloudy with visibility less than 1km. The temperature is 11.4℃, feeling around 11℃, with high humidity at 96%. Winds are light at 1.2m/s. This is approximately 7℃ colder than the foot of the mountain, which is partly cloudy at 18.2℃. Cloudy conditions are expected to persist throughout the day, with temperatures remaining stable between 11℃ and 12.5℃. Winds are also expected to remain gentle.

This poor visibility is likely to continue all day, significantly increasing the risk of getting lost, especially on the ridgelines around Okama crater lake and the traverse route from Katta-dake to Kumano-dake. In these exposed areas with little shelter, it is easy to lose direction in dense fog. Constant vigilance with a map, compass, and GPS is essential for careful navigation. The ground is considered wet due to high humidity and being enveloped in clouds. Rocky sections and wooden paths may be slippery, requiring careful footing.

For a perceived temperature of approximately 11℃, essential gear includes a quick-drying base layer, a mid-layer such as a thin fleece, and waterproof breathable rainwear (jacket and pants). Rainwear also serves as a crucial insulating layer. Gloves and a hat should also be carried. Although no precipitation is forecast, moving in high humidity increases the risk of hypothermia due to sweat chilling or getting wet. Maintain proper layering and take frequent breaks to manage body temperature. While the risk of lightning and strong winds is low, be aware that navigating in poor visibility will take longer than usual.

Precipitation probability increases towards evening, but no rainfall is forecast. Clouds are expected to clear overnight, leading to mostly clear skies, with temperatures stable around 11℃. The primary concern for today is the poor daytime visibility; avoid any unreasonable actions.