霧雨で視界不良 ロックガーデンは滑りやすい

Currently, the Tomuraushi summit is cloudy with a temperature of 7.6 degrees Celsius, feeling like 5.6 degrees Celsius. Visibility is 2.7 kilometers. The day will mostly remain cloudy, but light drizzle is expected to become more likely from around noon. The ground is generally wet, and rocky areas such as the Rock Garden are slippery when wet. Extreme caution is required to prevent falls, demanding careful footing.

While 2.7 kilometers of visibility allows for travel, visibility could further deteriorate in the afternoon with the expected drizzle. Tomuraushi often experiences weather conditions comparable to 3000-meter peaks in Honshu, and once dense fog sets in, the risk of getting lost increases dramatically. Especially in the vast wetlands around Kitamuma and Minaminuma, the terrain is monotonous and it is easy to lose direction. Regularly check your GPS and map, paying close attention to stay on course.

The apparent temperature at 2133 meters will be around 5.6 degrees Celsius in the morning, remaining in the 5-degree range in the afternoon. Although the wind is light, high humidity and drizzle will make it feel even colder. A moisture-wicking base layer, a fleece or light down mid-layer, and a waterproof and breathable rainwear set are essential. Prolonged activity in wet conditions increases the risk of hypothermia, so take frequent breaks and manage your body temperature diligently.

While the risk of lightning and strong winds is low, given that this is a long course that is difficult for a day trip, an early start and timely decision-making to turn back in case of worsening weather are crucial. Temperatures are expected to drop to 3-5 degrees Celsius at night, with light rain forecasted. If your activity extends into the evening, carry a headlamp and sufficient warm clothing, ensuring thorough preparation.