雨具必携。滑りやすい濡れた山肌に注意

Current conditions at Tomamu summit are 3.8 degrees Celsius, with a feels like temperature of 1.8 degrees Celsius. Light rain continues, with 96% humidity, creating a very damp environment. There is a 3.9 degree Celsius temperature difference between the summit and the base, meaning conditions cool significantly with elevation. Throughout the morning and into the afternoon, light rain is expected to persist. While temperatures will rise to 11.7 degrees Celsius by 3 PM, gusts of up to 11.1 m/s are also forecast, and wind on a wet body can rapidly lower the perceived temperature.

Mountain terrain will remain wet to muddy throughout the day. With zero snow cover, powder conditions, for which Tomamu is renowned, are not present. In open areas like the North Burn and Riverside, there is an increased risk of slipping and falling on wet ground. Visibility is currently 5.2 km, but it may further decrease due to the light rain. While not a complete whiteout, navigating unfamiliar terrain under reduced visibility is hazardous.

Despite easy gondola access to the summit, hypothermia due to wetness is a serious concern in Tomamu's often extreme cold environment. Wear a quick-drying base layer, an insulating mid-layer such as fleece, and a full waterproof and breathable rain suit. Carry spare warm clothing. Waterproof hiking boots are essential for foot protection, and be cautious of slips on wet rocks and soil. Precipitation will cease by evening, but temperatures will gradually drop. It is wise to conclude daytime activities early.