2024年4月，安徽亳州突降霰（xiàn），引发当地居民广泛关注。霰是一种固态降水形式，常被误认为是冰雹或小雪，但其实它是由白色不透明的小冰粒组成，直径通常在2至5毫米之间，落地易碎、反弹性强。与冰雹不同，霰多出现在冷暖空气剧烈交汇、对流较强的天气过程中，尤其是在春季或初冬的雷雨或强对流天气中。亳州位于中国安徽省西北部，属暖温带半湿润季风气候，四季分明。此次下霰正值春季气温波动较大时期，冷空气南下与暖湿气流相遇，形成不稳定的大气层结，从而触发了强对流天气，导致霰的形成。气象专家指出，这种天气现象虽不常见，但在特定气象条件下仍属正常。霰的出现往往预示着天气将发生明显变化，可能伴随雷电、大风甚至短时强降水。当地气象部门已发布相关预警，提醒市民注意出行安全，防范高空坠物及道路湿滑等次生风险。此次事件也再次提醒公众关注极端天气的频发趋势，增强防灾减灾意识。
In April 2024, Bozhou City in Anhui Province experienced a rare weather event—sleet (also known as snow pellets or ‘soft hail’), drawing widespread attention from local residents. Sleet consists of small, white, opaque ice pellets typically 2 to 5 millimeters in diameter. Unlike hail, which is hard and forms in strong thunderstorms, sleet is fragile, bounces upon impact, and often occurs during periods of intense atmospheric instability—particularly when cold and warm air masses collide sharply, such as in spring or early winter convective storms.Located in northwestern Anhui, Bozhou has a warm temperate semi-humid monsoon climate with distinct seasons. The recent sleet event coincided with significant temperature fluctuations in spring, when a southward-moving cold front met warm, moist air, creating unstable atmospheric conditions conducive to strong convection and sleet formation. Meteorologists noted that while uncommon, such occurrences are meteorologically normal under specific conditions.Sleet often signals an abrupt shift in weather and may be accompanied by thunderstorms, strong winds, or brief heavy rain. Local weather authorities issued alerts advising the public to take precautions against potential hazards like falling debris and slippery roads. This event also underscores the growing importance of public awareness regarding increasingly frequent extreme weather events and the need for enhanced disaster preparedness.
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