快晴から雨へ 午後の気温低下と噴気ガス注意

As of 7:30 AM, the summit of Mt. Meakan is clear with a temperature of 10.8°C and a feels like temperature of 8.8°C, indicating a calm start to the day. The temperature difference between the summit and base is 4.9°C, highlighting the colder conditions at higher elevations. Winds will shift from west-southwest to south, with gusts potentially reaching up to 10 m/s.

Clear skies are expected until 9 AM, but by noon, scattered showers will develop, followed by drizzle at 3 PM, with cloudy conditions and precipitation continuing thereafter. Temperatures will drop from 13°C at 9 AM to 9.5°C by 3 PM. As indicated by the automatic risk assessment, a rapid temperature drop of 7°C is expected during the forecast period. Be prepared for sudden changes in weather by carrying an extra insulating layer.

Current ground conditions are dry, but will become wet and muddy with the afternoon precipitation. Particular caution is advised on scree slopes, such as those on the Onneto Course, as they will become slippery. There is no snow cover, so crampons or microspikes are not required. Waterproof and breathable rain gear (jacket and pants) are essential. Carry a moisture-wicking base layer, a fleece or other mid-layer, and extra insulation.

The wind direction will shift from west-southwest to south today. This change could cause sulfur gas to accumulate near the fumaroles, increasing the risk of acute sulfur gas poisoning. Absolutely avoid entering downwind areas. The risk of hypothermia will also increase due to the dropping temperatures and rain; make an early decision to turn back if you feel the cold. Avoid any activity after sunset.