御嶽山 剣ヶ峰涼風吹き抜け。火山礫は乾

Current conditions at Mt. Ontake summit register 9 degrees Celsius, feeling like 6.3 degrees Celsius due to wind chill. This is a significant drop from the base at 19.8 degrees Celsius. While the day is expected to transition from partly cloudy to cloudy, no precipitation is forecasted. However, gusts could reach up to 13.7 meters per second, particularly on the exposed Ken-ga-mine peak and the white volcanic scree slopes above the treeline. This strong wind necessitates a windproof outer shell to prevent core body temperature loss.

Ground conditions are predominantly dry, given the lack of recent rainfall and above-freezing temperatures. The volcanic scree can be loose, requiring careful footing. As Mt. Ontake is an active volcano, carrying a helmet is strongly recommended, not only for potential volcanic activity but also for protection against wind-driven falling rocks on the exposed slopes. No crampons or microspikes are needed.

For layering, begin with a wicking base layer, add a mid-layer such as fleece or a light down jacket for insulation, and an essential windproof and waterproof outer shell. Carry gloves and a warm hat. While lightning risk is low today, continuous monitoring of weather patterns is crucial. Strong gusts up to 13.7 m/s pose a risk of losing balance, especially on the narrow paths leading to Ken-ga-mine. Be prepared to adjust plans if conditions deteriorate. Temperatures will gradually decrease towards evening, reaching around 9 degrees Celsius at the summit, so maintain sufficient warm layers throughout your descent.