独立峰の稜線は冷え込む。残雪に注意

Mount Chokai is expected to see clear skies throughout the day. The current summit feels like 0.7 degrees Celsius at 7:15 AM. Although the daytime high is forecasted to reach 7.1 degrees Celsius, considering gusts of up to 10 meters per second, the felt temperature on exposed ridges will approach freezing. The significant 12-degree Celsius temperature difference between the base and summit means a rapid drop in felt temperature as you gain elevation.

While the snow depth is currently 0 cm, Mount Chokai is known for its persistent snowfields that can last into autumn. It is highly probable that residual snow patches remain, particularly on approaches to Shinsan and in gully areas. The snow surface will soften with daytime warming but is expected to refreeze overnight as temperatures drop below zero. This freeze-thaw cycle increases the risk of slipping on these snow patches, so carrying microspikes or light crampons is strongly recommended. Exposed rock ridges are generally dry, but extra caution is needed in areas where frozen residual snow and rock coexist.

An automated risk assessment indicates an abrupt temperature drop of 7 degrees Celsius during the forecast period. Maintain vigilant body temperature management even during daytime activities. In addition to a three-layer system of base, mid, and outer, carry an extra insulating layer for breaks or unexpected stops. As an independent peak, Mount Chokai is directly exposed to winds from the Sea of Japan. Open ridges, such as those on the Hokodate Course, may experience stronger winds than forecasted, further lowering the felt temperature. Temperatures will particularly decline from afternoon to evening, with the summit expected to drop below freezing overnight. Make early decisions to turn back if you experience any signs of discomfort.