濡れた残雪と視界不良。行動は慎重に

The summit of Mt. Tokachidake is currently cloudy with a temperature of -0.1°C, feeling like -2.7°C. The base area reports light drizzle at 9°C, indicating a significant -9.1°C temperature difference from the summit. Throughout the day, summit temperatures are expected to hover between 1°C and -0.2°C, accompanied by light drizzle. The snow depth is 31cm. Given these conditions, the residual snow is very wet and slippery. While widespread ice formation is unlikely, chain spikes are essential for sections with firm underlying surfaces.

During your ascent, wear waterproof and breathable rain gear. Choose a quick-drying base layer, a fleece or light softshell for your mid-layer, and a waterproof breathable hardshell as your outer layer. Perceived temperatures will remain below freezing at times, and the persistent drizzle significantly increases the risk of hypothermia due to wetness. Waterproof and warm gloves and hats are crucial, and carrying spare dry clothing is highly recommended.

Visibility is currently poor at 3.6km and is not expected to improve during the day. Route finding around the Taisho crater and New crater will be challenging. Particularly on sections of the Bokaidai course leading to the ridge, unstable footing due to wet residual snow combined with poor visibility poses a significant hazard. Avoid pushing forward unnecessarily; being prepared to turn back is vital. Although no specific alerts were triggered by the automated risk assessment, the combination of drizzle and near-freezing temperatures makes hypothermia the primary concern.

Temperatures will drop to -2°C to -4°C from evening into night, with drizzle persisting. Winds will intensify overnight, reaching 3.09m/s with gusts up to 13.1m/s by midnight, making nighttime travel extremely hazardous due to freezing conditions, strong winds, and hypothermia risk. Exercise extreme caution regarding hypothermia even during daylight hours,