日中霧雨 午後雷雨に警戒 視界不良に注意

As of 07:00, the summit of Kamui Ski Links (735m) is cloudy with a temperature of 14.2℃ and visibility less than 1km due to fog. The base (148m) is 17.1℃, making the summit almost 3℃ cooler. Light drizzle is expected throughout the morning, with temperatures rising to 19.3℃ around 12:00, but poor visibility is likely to persist. The ground is already wet. From 15:00, light showers are forecast, followed by thunderstorms around 18:00, leading to increasingly muddy conditions. Even on the gently sloping routes like the longest 4km run, caution is required due to slippery, wet ground.

A rapid temperature drop of 7℃ is expected during the forecast period. Specifically, temperatures will fall to 15.5℃ after 15:00 and 14.6℃ by 18:00. With rain and wind, the felt temperature at the 735m summit is predicted to drop to around 10℃ in the afternoon. A fast-drying synthetic base layer, a fleece mid-layer, and a waterproof-breathable rain shell are essential. Given the thunderstorm forecast, immediately seek shelter or abort your activity if you hear thunder or see lightning. Be aware of Kamui's unique risk of rapid weather changes at lower elevations, and make early decisions to turn back.

There is no snow cover, so crampons or microspikes are not necessary. Waterproof-breathable rainwear (jacket and pants) is mandatory. Carry gloves and a hat to prevent hypothermia from getting wet. Afternoon activities are not advisable due to the high probability of thunderstorms. Morning activities are possible with light drizzle, but be mindful of poor visibility and wet ground. Descent should be completed before 15:00, when the precipitation probability reaches 100%. Visibility may further deteriorate near the summit ridge, increasing the risk of off-course falls. Prioritize early turnaround decisions.