雨と濃霧の一日。額平川コースの沢渡渉は増水に注意

The summit experiences strong drizzle with a perceived temperature of 11.2°C and 98% humidity, making for a chilly day. Drizzle and scattered showers are expected throughout the day, with precipitation increasing significantly between 12:00 and 15:00, from 2.3mm to 6.8mm. The base also sees drizzle but at a warmer 21.9°C, indicating a substantial temperature difference from the summit.

Ground conditions are wet to muddy. The increased precipitation in the afternoon raises concerns about rapid water level rises in the more than 20 river crossings along the Nukabira-gawa course of Horoshiri-dake. Be prepared for potentially impassable crossings and exercise caution, as turning back may be necessary. Visibility at 3.3km is currently adequate, but be aware of potential deterioration due to fog.

Hypothermia risk is high. Continuous exposure to rain in 10-degree Celsius temperatures can rapidly deplete body heat. Waterproof and breathable outer layers are essential. Wear a quick-drying base layer and an insulating mid-layer like fleece. Take breaks in sheltered spots and maintain energy with frequent snacks. Gusts up to 13.5 m/s are not prohibitive but will lower the perceived temperature. This area is known for high bear activity, so remain vigilant and take appropriate precautions.