夏空と高湿度。午後は雷雨と気温急降下

Mount Tsukuba experiences clear skies this morning with rising temperatures. At 7:00 AM, the summit is 22.9°C, feeling like 26.6°C. At the base, it is 27.1°C, feeling like 32.8°C, indicating a hot summer day. Temperatures are expected to climb further, reaching 28.3°C at the summit by 3:00 PM. High humidity will make conditions feel even hotter, especially in sheltered areas like the forest sections of the Miyukigahara and Shirakumobashi courses, where sweat may not evaporate easily. The risk of summer heatstroke is extremely high. Maintain consistent hydration and electrolyte intake, and hike at a manageable pace.

The weather is expected to become unstable in the afternoon, with increasing chances of precipitation from noon. By 3:00 PM, the probability of rain reaches 100%, with light rain or drizzle anticipated from late afternoon. Trails are dry in the morning but will become wet later, increasing the risk of slipping on rocky sections, particularly around the summit of Mt. Nyotai and other areas with unique rock formations. Exercise caution with every step.

A rapid temperature drop of 7°C is predicted. From the high daytime temperatures, it will cool down to 21.2°C by 6:00 PM and 19.5°C by 9:00 PM. Staying wet in these conditions significantly increases the risk of hypothermia. Carry waterproof and breathable rain gear, along with an extra insulating layer like fleece. Given the possibility of thunderstorms, it is advisable to conclude your hike early in the afternoon and avoid staying on the summit past 3:00