残雪の稜線は冷たい霧雨。行動は早めに

The summit currently shows light cloud cover with a temperature of 2.9℃, feeling like -0.2℃. Lingering snow depth is 17cm. There is a significant 10℃ temperature difference between the summit and the base, meaning the perceived temperature drops sharply with elevation gain. Light rain showers are expected to begin around noon, intensifying to drizzle by 3 PM, accompanied by a temperature drop to 0.8℃. During this period, the risk of hypothermia, especially with wet clothing, becomes very high.

For layering, wear a fast-drying base, a fleece or lightweight down mid-layer, and waterproof-breathable outer shell jacket and pants. Given the afternoon drizzle and temperature drop, carry an extra insulating layer. As indicated by the automatic risk assessment, a sharp temperature drop of 8℃ is anticipated during the forecast period, so make an early decision to turn back if conditions worsen. Around the Taisho Eruption Crater, where steep lingering snow patches remain, the drizzle will make the snow soft and slippery. Carrying traction devices like microspikes or light crampons, along with trekking poles, is recommended.

The ground will be wet and slippery due to the lingering snow and drizzle, with muddy sections likely below the tree line. While winds are relatively light, the combination of moisture and wind will make the perceived temperature feel much colder. The risk of lightning is low. After evening, precipitation will cease, but temperatures will drop below freezing, potentially causing wet ground and snow to freeze. Prioritize a safe descent before nightfall and avoid overextending yourself.