谷川岳、穏やかな晴天。稜線は風弱く視界良好

Tanigawadake summit registered mostly clear skies at 7:45 AM, with a temperature of 11.5℃ and a felt temperature of 10.1℃. Wind speeds were mild at 1.97m/s, gusting to 8.7m/s. There is an approximate 7.8℃ difference from the base. Temperatures are expected to rise during the day, reaching around 14.3℃ by noon, but the felt temperature will hover between 10℃ and 12℃. A wicking base layer, light fleece mid-layer, and a windproof lightweight shell are recommended. While the mid-layer might be unnecessary during active ascent, keep it readily available for breaks or exposed areas.

Ground conditions are dry to partially wet with exposed rock, as there is no snow cover or recent precipitation. Crampons or microspikes are not required, but rain gear should be carried as a precaution. The risk of lightning is low. While gusts of up to 12.3m/s may be felt on the exposed ridges of Toma-no-Mimi and Oki-no-Mimi, they are not expected to hinder movement significantly. The risk of hypothermia is low during activity but be mindful of sweat chill during breaks. Visibility is currently 3.8km, which is good, but Tanigawadake is known for rapid weather changes. Always be prepared for sudden dense fog and potential route loss.

Cloud cover is forecast to increase after 6:00 PM, with light drizzle expected by 9:00 PM and steady drizzle overnight. Temperatures will drop, reaching 7.7℃ by 3:00 AM on the 29th. Nighttime activity should be avoided. While the Tenjin-one route is in good condition, those attempting the Nishikuro-one should exercise extreme caution on its rocky sections.