独立峰富士は冬の様相 午後から降雪

Mount Fuji's summit presents winter conditions today, far removed from any summer perception. Current conditions at the 3766-meter peak are cloudy with a temperature of -1.8 degrees Celsius, feeling like -5.9 degrees Celsius. The significant temperature difference of 16.8 degrees Celsius from the base means summer gear is inadequate. While the morning remains cloudy, snow is expected to begin around 3 PM, with temperatures dropping to -3.6 degrees Celsius. The wind chill will keep the perceived temperature around -5 degrees Celsius throughout the day, necessitating robust cold weather preparation.

Although there is no current snow accumulation at the summit, new snow will begin to accumulate with the afternoon precipitation. The steep, volcanic scree slopes starting from the 5th station will become particularly treacherous and slippery with fresh snow. On the exposed, above-treeline slopes characteristic of Mount Fuji, even moderate gusts of 7.8 meters per second can make conditions feel severe, increasing the risk of hypothermia, especially with wet clothing. Waterproof-breathable outer layers, fleece or down mid-layers, and moisture-wicking base layers are essential. Gloves and a warm hat are also critical.

Snowfall is expected to intensify overnight, with up to 4.97 centimeters per three hours predicted by early morning. This new snow accumulation increases the avalanche risk. Avoid steep slopes and wind-loaded terrain, including the crater rim (O-hachi-meguri) route. While crampons may not be necessary at this moment, carrying microspikes or chain spikers is advisable for traction on potential icy patches or fresh snow. Visibility will also deteriorate significantly, making an early termination of activities strongly recommended.