午後雷雨と視界不良。ザレ場は滑落警戒

Mount Meakan is cloudy this morning, with a summit wind chill of 4.7 degrees Celsius and poor visibility at 1.8 kilometers, accompanied by 96% humidity. While temperatures will rise to 10.5 degrees Celsius at the summit by noon, light drizzle is expected to begin around midday, escalating to thunderstorms with light hail by 3 PM. The summit remains approximately 5 degrees Celsius colder than the base, maintaining a chilly environment.

Hiking trails are already wet this morning and will become increasingly muddy with the afternoon rain. Loose scree sections, particularly on the Onneto Course, will be extremely slippery, demanding strict caution against falls. Combined with poor visibility, careful footing is essential. The thunderstorm forecast for 3 PM warrants a recommendation to cancel any afternoon ascent. It is crucial to plan for an early morning start and begin descent no later than 2 PM.

Essential gear includes waterproof and breathable rainwear for both top and bottom. For layering, a quick-drying base layer and a mid-layer such as fleece or a light down jacket are necessary. Given the low wind chill and precipitation, the risk of hypothermia is elevated; gloves and a hat should also be carried, and efforts to stay dry are paramount. Near the fumaroles, the wind is forecast to shift to the northeast after 3 PM, which could lead to an increase in sulfuric gas concentration, requiring extra vigilance.