ひらふ山頂 霧雨と視界不良に注意

Niseko Hirafu summit currently experiences cloudy conditions with visibility below 1km, shrouded in mist. The temperature is 13.7℃ with 98% humidity, indicating a very moist atmosphere. A 6℃ temperature difference exists between the summit and the base, making it cooler as elevation increases. The perceived temperature at the summit is estimated at 13.7℃, so for activity, wear a base layer with a light mid-layer and prepare a waterproof outer layer.

Temperatures are expected to gradually rise during the day, with light drizzle beginning around noon and continuing intermittently through the afternoon. With no snowpack, the ground will be generally wet due to the precipitation and high humidity. Caution is advised on rocky and earthy slopes, particularly when ascending from the Hirafu slopes or traversing the tree run areas, as surfaces will be slippery. Crampons or microspikes are not necessary, but sturdy hiking boots with good grip and rain gear are essential.

While strong winds leading to whiteout conditions on the ridges are not anticipated, limited visibility will persist throughout the day. The perceived temperature during activity will hover around 13℃, but getting wet from the drizzle will lower the actual feel. It is essential to carry waterproof outerwear (rain gear) to mitigate the risk of hypothermia. The risk of lightning is low, and winds are generally calm, though gusts up to 7.5m/s are possible in the afternoon. Precipitation will cease overnight, but temperatures will drop to the 13℃ range, maintaining humid conditions.