稜線に冬の気配 低体温に厳重警戒

The summit is currently cloudy with a temperature of -3°C, feeling like -7.2°C, a return to winter-like cold. Visibility is 1.3km. There is no precipitation at present, so the risk of rapid swelling in the Ekihiragawa Course river crossings is low. However, snow is forecast to begin around 3 PM, transitioning to light drizzle overnight. The ground near the summit will be frozen or exposed wet rock, making rocks and stones slippery. Extreme caution is required during river crossings.

The risk of hypothermia is very high. A quick-drying base layer such as merino wool or synthetic, a thick fleece or lightweight down mid-layer, and a waterproof-breathable shell as an outer layer are essential for effective layering and temperature regulation. Waterproof gloves and a warm hat are also crucial. Gusts are moderate at 9.4m/s, but the cold wind will be felt on exposed ridges, necessitating robust wind protection.

The deep primeval forests of the Hidaka Mountains are a dense habitat for brown bears. Carrying a bear bell or whistle, meticulous food management, and moving in groups are advised. Light drizzle and sub-zero temperatures will persist into the evening, posing a risk of freezing wet clothing and gear. Even when staying at Poroshiri Hut, ensure adequate cold weather protection. Deteriorating visibility is also expected, requiring careful navigation in the glacial cirque terrain.