残雪と視界不良。大雪渓は慎重に

The summit of Mt. Shirouma is currently mostly clear with a temperature of 5℃ and visibility less than 1km. There is nearly a 10-degree Celsius difference from the base. Temperatures are expected to rise to the 7s during the day, but poor visibility is likely to persist throughout. While winds are calm in the morning, it will become partly cloudy in the afternoon, with a higher chance of precipitation at 3 PM. Although no actual rainfall is expected, be mindful of decreasing temperatures and worsening visibility.

Current snow depth is 54cm. On the Daisekkei (Great Snow Valley), the remaining snow is thick. The rising daytime temperatures will soften the snow, increasing the risk of post-holing and slipping. Light crampons or microspikes are essential gear. During your ascent, be vigilant for falling rocks and constantly check your surroundings. Careful footing is required on exposed rocky ridges.

The sensible temperature will range from 3℃ to 7.5℃. An appropriate layering system includes a wicking base layer, a mid-layer such as fleece, and a waterproof-breathable shell. While the risk of hypothermia is low due to light winds, prolonged inactivity in poor visibility can lead to body heat loss. There is no forecast for thunderstorms, but be prepared for worsening visibility in the afternoon by carrying a GPS, map, and compass for route confirmation.

Aim to complete your activities by early afternoon, avoiding prolonged stays on the exposed ridges as temperatures will drop significantly after sunset, reaching around 3℃ at night.