谷川岳 午前は快晴。午後は急変に注意

As of 7 AM, the summit of Tanigawadake is mostly clear with a comfortable temperature of 16.7°C, feeling like 17.7°C. Winds are light, and visibility exceeds 20km, promising excellent views. There is an approximate 8°C temperature difference between the summit and the base, offering cooler conditions as you ascend.

Prioritize an early start to make the most of the stable morning weather. Pay close attention to the twin peaks of Toma-no-mimi and Oki-no-mimi. The risk of route loss due to dense fog increases significantly on the ridge during sudden afternoon weather changes. Today's forecast indicates a sharp rise in precipitation probability from 35% to 96% after 12 PM, with brief showers expected. Although the predicted rainfall is minimal, remain vigilant for rapid weather shifts characteristic of this mountain range.

Ground conditions are generally dry, but afternoon showers could make rocks and soil wet. Exercise extreme caution on routes near the East Face rock walls, where wet rock surfaces pose a slip hazard. While crampons or microspikes are not necessary, waterproof and breathable rain gear is essential for both rain protection and warmth. Be prepared to wear it promptly. Daytime temperatures during activity may rise to around 20°C, but a lightweight long-sleeve shirt or wind shell is advisable during breaks or on exposed ridges.

Although lightning risk is not explicitly indicated, the increasing afternoon precipitation probability suggests the potential for developing cumulonimbus clouds. If you hear thunder or observe rapidly changing skies, descend from the ridge immediately and seek a safe location. Temperatures will drop to the mid-15s overnight, but with light winds, the risk of hypothermia is low. However, avoid prolonged stops if you become wet.