幌尻岳 山頂はガス中。体感低温に注意

Horoshiri-dake summit is currently cloudy with visibility less than 1 kilometer. The air temperature is 3.5 degrees Celsius, feeling like 0.7 degrees Celsius. Base areas are mostly clear with 16.7 degrees Celsius, indicating a significant temperature difference.

Throughout the day, conditions will remain partly cloudy to cloudy. While the temperature might rise to 5.9 degrees Celsius in the late morning, an easterly wind averaging 2.7 meters per second, with gusts up to 8.3 meters per second, will make the felt temperature drop to below freezing. On routes like the Nukabira River course, with over 20 river crossings, getting wet significantly increases the risk of hypothermia. Rocks in the river are slippery due to high humidity. Poor visibility on the ridge and in the cirque terrain makes route-finding challenging, so constant position checks are crucial.

Essential layering includes a quick-drying base layer, a mid-weight fleece or similar mid-layer, and a waterproof-breathable outer jacket and pants. Gloves and a warm hat are also necessary. Despite no precipitation, high humidity and low temperatures mean the ground will be wet, making exposed rock ridges and riverbanks slippery. Some muddy sections are also expected. Crampons or microspikes are not required. While lightning risk is low, severe caution against hypothermia is paramount.

Temperatures will continue to drop into the evening, reaching around 1 degree Celsius overnight. A light drizzle is forecast around 9 PM, so it is advisable to conclude all activities early.