残雪の旭岳 微風快晴 雪は緩む

Mount Asahidake summit is experiencing clear skies with a temperature of 3°C and a feel-like temperature of -0.1°C, indicating stable weather throughout the day. The maximum daytime temperature is forecast to rise to 6.1°C around noon, with gentle winds gusting up to 6.6 m/s. The route from the Asahidake Ropeway Sugatami Station to the summit is still covered with significant snow, measuring 183 cm deep. As temperatures rise during the day, the snow surface will soften. Particular caution is advised on south-facing slopes and around the fumarole group (Jigokudani), where melting progresses due to geothermal heat, increasing the risk of post-holing and slippery conditions.

For layering, a quick-drying synthetic or merino wool base layer, a light fleece or softshell mid-layer, and a windproof and waterproof outer shell are essential. It is crucial to carry an insulating layer, such as a down jacket, for breaks or emergencies. Gloves and a hat are also necessary. As temperatures will drop below freezing after sunset, the snow surface may firm up. Therefore, crampons or microspikes, and an ice axe or trekking poles, must be carried.

The risk of hypothermia is low during daytime activity but increases after sunset due to falling temperatures and during periods of inactivity. Proper layering and activity management are vital. Risks of lightning and strong winds are low. Visibility will remain excellent throughout the day, but conditions in spring mountains can change rapidly. Always monitor your surroundings and plan your ascent wisely.