残雪緩む日中。夜間は凍結。深部への行動は慎重に

Tomuraushi summit reports clear skies with good visibility at 7:15 AM. The temperature is 2.3℃, feeling like -0.9℃. There's an 11.3℃ difference from the base. The day will mostly be cloudy, with temperatures expected to rise to 6.5℃ around noon. Winds will remain light, keeping the felt temperature above freezing during the day.

The rising daytime temperatures will soften the remaining snowpack around 2133.35m. Expect unstable footing, especially in the Lock Garden and around the Kitama and Minaminuma alpine wetlands, where the snow will become slushy. Melting snow will refreeze overnight, creating icy patches, making crampons an essential item. As indicated by the automated risk assessment, a sharp temperature drop of 9℃ is expected during the forecast period. Temperatures will fall below 0℃ from evening into night, reaching -4.6℃ by 3 AM. Carry an extra insulating layer to prepare for sudden changes.

Layering should consist of a wicking base, a mid-layer such as fleece or a light down jacket, and a waterproof-breathable shell. For night travel or extended stops, bring a heavy down jacket or synthetic insulation suitable for severe winter conditions. This mountain range is a challenging long course, often experiencing weather conditions comparable to Honshu's 3000-meter peaks. Always be mindful of the risk of sudden weather changes, as seen in the 2009 accident, and be prepared to turn back early. While lightning and strong wind risks are low, hypothermia remains a serious concern due to the rapid temperature drop.