十勝岳 湿潤な山肌 視界回復は夕刻

Today on Tokachidake summit, light drizzle persists throughout the morning and into the afternoon, with a very high humidity of 98%. The temperature is 11.6℃, feeling like 11.2℃, and the wind speed is a gentle 1.5m/s. There is a 7.3℃ difference from the base, indicating a significant change in perceived temperature as you ascend. For activity, a quick-drying base layer, a thin fleece mid-layer, and waterproof breathable rainwear are essential. During breaks, be sure to add an extra insulating layer to prevent hypothermia from wet clothing.

The ground is wet due to the light drizzle and high humidity, with muddy sections likely. Rocky areas will also be slick. Crampons or microspikes are not needed, but choose waterproof hiking boots with good grip. In areas with high volcanic gas concentrations, such as around the Taisho Eruption Crater and Shin Fundo Crater, the rain may cause gas to accumulate. Pay close attention to any changes in your physical condition.

The risk of thunderstorms is low, though light precipitation will continue during the day. The risk of strong winds is also low, with gusts peaking at around 8m/s, posing no significant impediment to movement even on exposed ridges above the tree line. The risk of hypothermia is low given the current temperature and wind speed, but prolonged stops while wet could increase it. The drizzle is expected to continue until around 3 PM, clearing to mostly sunny skies by 6 PM, with improved visibility. Temperatures will drop to the 9℃ range overnight, but the wind will further subside.