10级以上雷暴大风来袭

Core Viewpoint - The article discusses the blue alert for severe convective weather issued by the Central Meteorological Observatory, highlighting the expected severe weather conditions across various regions in China, including strong winds, hail, and heavy rainfall [2][3]. Summary by Sections - Severe Weather Forecast - A blue alert for severe convective weather is in effect from September 14, 08:00 to September 15, 08:00, predicting areas in Inner Mongolia, Northeast China, and northern Jiangnan to experience winds exceeding level 8, with some regions in Heilongjiang expected to see winds above level 10 [2]. - Short-term heavy rainfall is anticipated, with hourly rainfall exceeding 20 mm in several areas, and some regions in Chongqing and Guizhou may see hourly rainfall exceeding 50 mm, potentially reaching over 60 mm [2]. - Impact Timing - The main impact period for the severe convective weather is expected to be during the daytime of September 14 [3]. - Defense Guidelines - Government and relevant departments should prepare for short-term heavy rain, thunderstorms, and strong winds, while meteorological departments should be ready for artificial hail prevention [6]. - Outdoor activities should be minimized, and individuals should stay away from temporary structures [6]. - Livestock should be moved to sheltered areas, and windows and doors should be secured [6]. - Waterway operations should take precautions, and construction sites should protect materials from the weather [6]. - Drainage systems in urban areas, farmland, and fish ponds should be checked and prepared for potential flooding and landslides [6]. - Recent Severe Weather Events - On the evening of September 13, Beijing experienced severe convective weather, including thunderstorms, strong winds, hail, and short-term heavy rainfall, leading to public astonishment at the intensity of the hail [8]. - The hailstorm was attributed to the formation of a supercell thunderstorm, influenced by unstable atmospheric conditions due to the late southward movement of the subtropical high and abundant moisture in the lower atmosphere [8][9]. - The combination of cold air aloft and warm, moist air below created an unstable stratification conducive to the development of severe convective weather [9].