日中は霧雨と低温に注意。沢渡渉は慎重に

The summit of Mt. Poroshiri is currently cloudy, with a temperature of 4.4°C, but feeling like 1.7°C. There is a significant temperature difference compared to the base, and it will feel harsher on the ridgelines. It is expected to remain cloudy for most of the day, but light drizzle will begin around 3 PM and continue intermittently into the night. Although precipitation amounts are low, temperatures will drop rapidly from the afternoon, falling below freezing by night.

A sharp temperature drop of 11°C is anticipated during the forecast period. With light drizzle and decreasing temperatures from 3 PM onwards, the perceived temperature will feel even colder. On routes like the Ekihiragawa Course, which involves numerous river crossings, wet clothing can directly lead to hypothermia. Wear a quick-drying base layer, a fleece mid-layer, and a waterproof and breathable shell as an outer layer. Carry an extra insulating layer, such as a light down jacket, to prepare for sudden drops in temperature during your activity. It is crucial to make an early decision to turn back if conditions worsen.

The ground is expected to be generally wet to muddy. There is almost no snow, but the daytime drizzle will make trails prone to becoming slick. Waterproof and breathable rain gear is essential equipment. For river crossings on the Ekihiragawa Course, prepare wading shoes or footwear that can get wet, and cross cautiously on the slippery terrain. While wind speeds are relatively low, the ridgelines of the Hidaka Mountains are exposed, so be mindful of the cold during breaks in activity. Bear activity is also high during this season, so avoid solo travel, make noise while moving, and manage food properly.