唐山现巨型龙卷风？气象局回应

近日，有网友称河北省唐山市迁西县境内出现龙卷风天气。17日，唐山市气象局表示，经核实，此现象属于局地尘卷风现象，不是龙卷风现象。从视频上看，在一处土坡处，一黑色涡旋从地面直连天际，与晴朗的天空形成鲜明对比。视频发布者称，这是唐山市迁西县境内16日发生的龙卷风现象。

迁西县应急管理局工作人员表示，应急局16日全天并未接到有关龙卷风天气受灾的报告。迁西县气象局工作人员也表示，据气象局观测，16日县城内未曾观测到龙卷风天气。

当地工作人员表示，经核实，此现象属于局地尘卷风现象，不是龙卷风现象。

尘卷风和龙卷风究竟有何区别？气象专家、通辽市气象站首席专家徐建国告诉极目新闻记者，龙卷风一般伴随着强对流天气，多在雨天出现，而尘卷风则多在晴天出现。同时，龙卷风是从空中向地面伸展，而尘卷风则是从地面向空中发展。龙卷风造成的危害较大，尘卷风造成的危害较小。

“尘卷风是由于地表受热不均，形成的涡旋。”徐建国称，尘卷风最高可以达到20多米。“从视频来看，这是晴天，应该是属于尘卷风，但威力较大。”徐建国表示。

Qianxi County Emergency Management Bureau staff said that the emergency bureau 16 whole day did not receive a report of tornado weather disaster. Qianxi County Meteorological Bureau staff also said that according to meteorological bureau observations, 16 county seat has not observed tornado weather.

Local staff said that after verification, this phenomenon belongs to the local dust tornado phenomenon, not the tornado phenomenon.

What's the difference between a dust tornado and a tornado? Xu Jianguo, a meteorologist and chief expert of Tongliao Meteorological Station, told Jimu News.Tornadoes are generally accompanied by strong convective weather, which often occurs in rainy days, while dust tornadoes occur in sunny days. At the same time, tornadoes extend from the air to the ground, while dust tornadoes develop from the ground to the air. The harm caused by tornadoes is greater than that caused by dust tornadoes.

"Dust tornadoes are eddies caused by uneven heating on the surface." Xu Jianguo said that dust tornadoes can reach a maximum of more than 20 meters. "from the video point of view, this is a sunny day, should be a dust tornado, but more powerful." Xu Jianguo said.