霧雨の湿原は道迷い注意。冷涼な一日

Naeba's summit reports a cool morning with mist and light rain, current temperature 12.3℃ and a feels-like temperature of 11.5℃. Humidity is extremely high at 97%, meaning conditions will keep you damp throughout the day. The base area records heavier mist and rain at 19.3℃, a significant 7℃ difference from the summit. While the forecast suggests brief periods of partly cloudy skies during the day, the probability of precipitation remains 100% until evening, when heavier mist and rain are expected to return after 6 PM.

Under these conditions, all trails will be wet and muddy. Particular caution is advised on the boardwalks across Naeba's vast summit wetlands, which will be slippery. The persistent mist and high humidity create a significant risk of sudden dense fog, increasing the danger of disorientation on the expansive plateau. Although current visibility is 8km, the high humidity means conditions can change rapidly. Strictly adhere to the boardwalks to protect the delicate wetland ecosystem.

With a feels-like temperature of 11.5℃, which is low for summer, there is a tangible risk of hypothermia due to a combination of perspiration and external moisture. Essential layering includes a wicking base layer (synthetic or wool), a light fleece mid-layer, and waterproof-breathable rain gear (jacket and pants) that should be worn throughout your hike. Ensure your hiking boots are waterproof with good grip, and trekking poles will be beneficial. While lightning and strong winds are not major concerns, cold weather preparedness is crucial.

Temperatures will remain in the 12℃ range overnight, with cloudy or misty conditions persisting. Day hikes are feasible, but robust rain gear, comprehensive cold weather protection, and meticulous navigation planning for potential whiteout conditions are absolutely essential.