額平川渡渉は午前中に。午後霧雨で増水警戒

Summit of Mt. Poroshiri is clear and sunny. As of 8 AM, the temperature is 6.1°C, feeling like 3.6°C. There is a significant temperature difference of about 9°C compared to the base. The clear weather is expected to continue through the morning, with temperatures rising to 7.7°C by noon. However, winds of 3.38 m/s with gusts up to 10.5 m/s are forecasted for the ridgelines, which could affect exposed areas, though the overall risk of strong winds is moderate.

For those traversing the Nukabiragawa Course, which involves over 20 river crossings, it is strongly advisable to complete these during the calm and clear morning hours. Light drizzle is anticipated around 3 PM, and while the precipitation amount is minimal at 0.2mm, there is a slight possibility of increased water levels in the streams. Be vigilant against hypothermia if you get wet, especially given the fluctuating temperatures. Ground conditions are generally wet, with some slippery sections.

Essential layering includes a quick-drying base, a mid-layer such as fleece or a light down jacket, and a waterproof-breathable outer shell. Full rain gear is crucial for the anticipated afternoon drizzle and potential exposure. Although there is no snow accumulation at the summit, minor patches of seasonal snow might still be present in the cirque terrain. Crampons or microspikes are not necessary, but trekking poles and specialized river shoes or neoprene socks are highly recommended for the numerous river crossings. The Hidaka Mountains are a dense habitat for brown bears, so bear bells, sprays, and proper food storage are essential countermeasures. Prepare for significantly colder temperatures overnight, dropping to 1.3°C by 9 PM.