一ノ越からの残雪は硬め 低体温症に警戒

Tateyama summit currently experiences light overcast skies with a perceived temperature of minus 3.6 degrees Celsius. There is a 3.8-degree difference from the base temperature, and the summit area will hover around 0 degrees Celsius throughout the day. While the morning is expected to be mostly clear, light drizzle is forecast from noon to around 3 PM. Although precipitation will be minimal, getting wet can significantly lower the perceived temperature, increasing the risk of hypothermia.

Current snow depth stands at 199 centimeters. The route from Murodo to Ichinokoshi and onto the Oyama summit is predominantly covered in snow. Early mornings and shaded areas may have hard, frozen snow, so it is crucial to carry full crampons, not just microspikes. Exposed rocky sections will also be slippery if wet from the drizzle. Particular caution is advised on the steep ascent from Ichinokoshi, where wet snow and rocks pose a slip hazard.

Ensure thorough cold weather preparation. Wear a quick-drying base layer, a mid-layer such as fleece or light down, and a waterproof-breathable shell jacket. Although wind speeds are light, getting wet can rapidly deplete body heat. The weather is expected to improve in the evening, with clear skies overnight, but temperatures will drop to around minus 3 degrees Celsius. If equipment gets wet from the daytime drizzle, it could freeze overnight, so completing your descent early is highly recommended.