曇りから霧雨へ。濡れる午後の山頂

The morning is cloudy with high humidity of 90% at the summit, and visibility is moderately limited at 8.6km. There is a significant weather difference between the summit at 17.9°C and the base at 20.9°C, making the summit feel cooler. The estimated wind chill at the summit around 9:00 AM is approximately 13.7°C, influenced by a wind speed of 3.91m/s. By noon, strong drizzle is expected, transitioning to light rain in the afternoon. Temperatures will drop to 17.2°C by noon and 16.3°C by 3:00 PM.

Ground conditions, currently near dry in the morning, will rapidly become wet and muddy due to the drizzle and rain starting at noon. On the "Longest 3,600m Run" course, a key feature of Sapporo Kokusai Ski Resort, be cautious of muddy surfaces and slippery conditions caused by rainwater. Essential layering includes a quick-drying base layer, a mid-layer such as fleece, and waterproof breathable rainwear (jacket and pants). Getting wet will further lower the perceived temperature, increasing the risk of hypothermia. Carry an extra mid-layer.

The maximum gust during the day is 11.7m/s at noon, which should not impede activity significantly. However, reduced visibility in the afternoon requires cautious movement. Rain will continue and intensify from evening into night, with precipitation reaching 6.3mm and wind gusts up to 17.7m/s by 3:00 AM. Avoid any mountain activities during the night.