白馬岳快晴の稜線。残雪は凍結注意

Hakuba-dake summit is clear with excellent visibility exceeding 20km. Daytime temperatures will rise from 3.1°C to 6.1°C, but the perceived temperature remains low. Westerly winds will reach gusts of approximately 15.3m/s during the day, generally not hindering movement, but be aware of wind exposure on exposed ridges.

Ground conditions are primarily exposed rock. However, residual snowfields, especially in shaded areas and along the Daisetsukei (Great Snow Valley), are highly likely to be frozen, particularly in the morning. For those ascending the Daisetsukei route from Sarukura, light crampons or chain spikes are essential to prevent slipping and potential falls.

The current perceived temperature is -0.2°C. Layering is crucial: a wicking base layer, a fleece or light down mid-layer, and a windproof/waterproof outer shell are recommended. Always carry extra insulation for stops to mitigate hypothermia risks. The risk of lightning is low.

Weather conditions are expected to deteriorate significantly from late night to early morning. Light drizzle is forecast around midnight on June 12th, intensifying to heavy snow with approximately 0.91cm of accumulation by 3 AM. Complete your day's activities and secure a safe overnight location before nightfall.