霧雨が沢を濡らす 額平川渡渉は足元注意

Mount Poroshiri summit area is cloudy with a temperature of 12.3°C. Light drizzle is expected throughout the day, with precipitation probability reaching 96% to 100% from noon to 3 PM. The temperature difference from the base is approximately 10°C. For the Ebiragawa River route, which involves over 20 river crossings, even slight precipitation will make the riverbed rocks and stones wet and extremely slippery. While the daytime high of 15.3°C is relatively warm, moving through drizzle while wet can cause the apparent temperature to feel significantly lower than the actual air temperature.

The apparent temperature will range from approximately 12°C to 15°C throughout the day. For layering, a quick-drying synthetic or wool base layer is recommended, along with a thin fleece or synthetic active mid-layer. A waterproof and breathable rainwear set is essential as an outer layer. The risk of hypothermia due to getting wet during river crossings is a serious concern. Choose waterproof hiking boots or river shoes, and use trekking poles for balance during cautious crossings.

There is no forecast for lightning or strong winds that would severely restrict movement. However, continuous exposure to drizzle while wet can lead to significant physical exhaustion and hypothermia. Avoid pushing your limits, and be prepared to turn back if you experience any signs of discomfort. Precipitation is expected to cease by evening, but temperatures will drop to around 10°C. Plan your day to avoid spending the night in wet clothing.