At 10:40 on June 13th, Huangnan Meteorological Observatory issued a yellow warning for severe convection: it is expected that from 11:00 on June 13th to 11:00 on June 14th, there will be thunderstorms and strong winds of level 8 or above, or hail with a diameter of more than 5 millimeters in the whole state; The strong convection is mainly concentrated from the afternoon to the night of the 13th. The meteorological risks of wind disasters, hail disasters, lightning strikes, landslides, mudslides, flash floods, urban and rural waterlogging and other disasters are high. Please pay attention to prevention. Defense guidelines: 1. The government and relevant departments shall make preparations for short-term rainstorm, lightning protection and gale prevention according to their responsibilities, and make preparations for manual hail suppression; 2. Outdoor pedestrians and staff should reduce outdoor activities, pay attention to staying away from large trees, corners of walls, or scaffolding billboards, and do not stay on mountaintops, ridges, rooftops, waterfront areas, or open spaces; 3. Drive away poultry and livestock into covered areas, close doors and windows, and reinforce sheds; 4. The construction materials shall be covered on the construction site, and the outdoor materials that are vulnerable to rainstorm and wind and hail shall be properly placed; 5. Check the drainage system of cities and farmland, prepare for drainage and defense against disasters such as flash floods, landslides, and mudslides.