Core Points - On April 12, significant strong convective weather occurred in most parts of Guangdong, with moderate to heavy rain in the central and northern counties, and local heavy rain in other areas [1][3] - Wind speeds reached levels of 7 to 9, with localized gusts of 10 to 12, affecting most counties except for the southwestern regions [1][3] - The weather forecast predicts sunny to partly cloudy conditions from April 13 to 15, with temperatures expected to drop by 3 to 6 degrees Celsius due to cold air influence [5][6] Weather Conditions - From 8 AM to 5 PM on April 12, nine towns recorded over 50 mm of rainfall, while 222 towns recorded between 25 mm to 50 mm of heavy rain [3] - The highest recorded rainfall was 61.6 mm in Heyuan and 60.1 mm in Shaoguan [3] - Wind speeds included gusts exceeding 24.5 m/s (10-level wind) at eight meteorological stations, and 20.8 m/s to 24.5 m/s (9-level wind) at 59 stations [3] Temperature Changes - The maximum temperatures in southwestern counties increased by 1 to 2 degrees Celsius compared to April 11, while other areas saw a decrease of 1 to 4 degrees Celsius [3][4] - The highest temperature recorded was 33.7 degrees Celsius in Zhanjiang [4] Future Weather Forecast - The forecast for April 13 to 15 indicates mostly sunny weather, with minimum temperatures ranging from 10 to 14 degrees Celsius in northern Guangdong and 18 to 20 degrees Celsius in the western counties [5] - On April 15, the minimum temperatures are expected to be between 11 to 14 degrees Celsius in northern Guangdong and 17 to 20 degrees Celsius along the western coast [5] Marine Weather Conditions - A marine wind forecast indicates north winds of 6 to 8 levels with gusts of 9 to 10 levels on the night of April 12, transitioning to northeast winds of 5 to 7 levels during the day on April 13 [6] - The weather department advises caution for coastal tourism, marine operations, and transportation safety due to strong winds [6]

受突发强对流天气影响，今日珠江口及港珠澳大桥海域出现短时强降水、雷暴大风，严重威胁水域通航 安全。目前港珠澳大桥水域风力已达6级，为确保船舶航行安全，港珠澳大桥海事局于17时00分启动交 通管制，禁止内河船通过港珠澳大桥桥梁航道。海事部门特别警示，12日夜间珠江口水域将有8级以上 阵风，所有航经大桥船舶须严格遵守管制指令，严禁冒险进入管制水域；锚泊船舶须加固系泊设备，保 持24小时人员值守防止走锚；如遇突发险情，立即通过VHF16频道报告或拨打12395水上遇险求救电 话。(央视新闻) ...

Group 1 - The Central Meteorological Observatory issued an orange warning for strong winds, indicating that a strong cold air mass will continue to affect the central and eastern regions of China from April 12 to 13, with significant wind, sand, and temperature drops expected [1] - Wind speeds reached levels between 11 to 15 on the Beaufort scale in various regions, including Gansu, Inner Mongolia, Ningxia, Shanxi, and parts of Beijing, with local areas experiencing winds as strong as 14 to 15 [1] - Sandstorms were reported in regions such as Xinjiang, Inner Mongolia, Gansu, and Shanxi due to the strong winds [1] Group 2 - The impact of the strong winds and sandstorms is expected to spread beyond the northern regions to the middle and lower reaches of the Yangtze River [2] - The Central Meteorological Observatory also issued blue warnings for sandstorms, severe convective weather, and blizzards, forecasting localized sandstorms in southern Xinjiang and severe thunderstorms in parts of Jiangxi, Guangxi, and Guangdong [2] - Meteorological experts noted the complexity and variability of the current cold air process, advising the public to follow local weather forecasts and take appropriate protective measures [2]