午後から霧雨 一日通じ濡れる足元

Mount Miyanoura's summit is currently partly cloudy, with a perceived temperature of 12.5℃. A 3.3℃ temperature difference exists between the summit and the base. While the morning is expected to remain calm, light misty rain will begin around noon, with precipitation probability rising to nearly 60% in the afternoon. Gusts are forecast to reach 20.3m/s by 15:00, significantly impacting exposed ridge lines.

Miyanoura-dake is known as an exceptionally rainy region, meaning trails are perpetually wet even without current precipitation. From the afternoon's misty rain to the night's heavier rain, rocks and tree roots will become increasingly slippery. For those undertaking the long approach from Yodogawa Trailhead, ensuring secure footing is paramount. While air temperatures are in the mid-14℃ range, the 97% humidity combined with getting wet will drop the perceived temperature into single digits, increasing the risk of hypothermia. A quick-drying base layer, a fleece mid-layer, and a waterproof-breathable shell are essential.

Current visibility is 5.1km, but the afternoon's misty rain will increase the risk of getting lost due to dense fog. Rapid increases in stream levels are also a concern. There is a low risk of lightning. Given the deteriorating weather in the afternoon, an early start and prompt descent are strongly advised. Day trips are extremely challenging. As precipitation probability exceeds 90% and rainfall increases overnight, activity during these hours should be avoided.