霧雨と突風。湿原帯は道迷いと体感低下に警戒

Hakkoda Summit will experience light drizzle from 9 AM, persisting throughout the day, despite a mostly clear morning. While the summit temperature hovers around 10°C, wind gusts reaching up to 13.2 m/s will cause the perceived temperature to drop to near 0°C or even below zero, particularly around noon. There is a significant 5-degree Celsius temperature difference between the summit and base, indicating much colder conditions at higher elevations.

With no snow cover, the ground will be wet due to the continuous light rain. Expect muddy conditions, especially in marshy areas, requiring careful footing. Waterproof and breathable rain gear, both top and bottom, are essential. Additionally, warm mid-layers like fleece or light down, along with gloves and a warm hat, are crucial to mitigate heat loss from the gusty winds.

A significant risk today is disorientation in dense fog, particularly across the marshlands and around the crater lakes near Hakkoda-Odake. Persistent light drizzle can severely reduce visibility, making it easy to lose your way. Always confirm your route with a map, compass, and GPS, avoiding any impulsive actions in poor visibility. Be vigilant for signs of hypothermia; wet clothing combined with strong winds can rapidly lower body temperature. Take breaks in sheltered spots, promptly change out of wet layers, and ensure adequate hydration.

The weather is forecasted to clear by late evening, becoming fair overnight, but temperatures will drop further. It is advisable to complete your activities during daylight hours. Hikers should be well-prepared for the cold, wet conditions and potential for navigational challenges.