稜線は荒れる一日。白い火山礫斜面では突風に警戒

Summit conditions will transition from partly cloudy to clear, but strong winds will persist throughout the day. The current temperature is 1.5 degrees Celsius, with a wind chill of minus 2 degrees Celsius. Although temperatures are expected to rise during the day, gusts will make movement difficult and significantly lower the perceived temperature. Expect a wind chill of around minus 10 degrees Celsius at 09:00, and potentially below minus 15 degrees Celsius by 12:00 with gusts of 22.2 m/s.

Ground conditions are predominantly dry, with no precipitation or snow cover. However, high humidity at times may cause some of the white volcanic gravel slopes to be slightly damp. There is no mud, residual snow, or ice, so crampons or microspikes are not necessary.

On the ridge leading to Kengamine, the risk of losing balance due to strong winds and hypothermia is extremely high. A quick-drying base layer, mid-layers such as fleece or light down, and a windproof and waterproof shell jacket and pants are essential gear. Gloves, a hat, and a balaclava must also be carried. As Mount Ontake is an active volcano, carrying a helmet is strongly recommended as a precaution. Unwise actions can lead directly to hypothermia, so plan your ascent with ample margin and do not hesitate to turn back if conditions worsen. Overnight, temperatures will drop below freezing, but winds are expected to diminish.