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]

Core Points - Sudden severe convective weather has impacted the Pearl River Estuary and the Hong Kong-Zhuhai-Macao Bridge area, posing significant threats to navigation safety [1] - The Maritime Safety Administration has implemented traffic control measures, prohibiting inland vessels from passing through the bridge's navigation channel to ensure the safety of maritime operations [1] - A warning has been issued for gusts exceeding level 8 in the Pearl River Estuary during the night of the 12th, with strict compliance required from all vessels navigating the bridge area [1] Summary by Category - **Weather Impact** - Severe weather conditions, including heavy rainfall and thunderstorms, have been reported in the Pearl River Estuary and surrounding areas [1] - Wind speeds have reached level 6 in the Hong Kong-Zhuhai-Macao Bridge area, indicating a significant weather disturbance [1] - **Safety Measures** - The Maritime Safety Administration initiated traffic control at 17:00 to prohibit inland vessels from using the bridge's navigation channel [1] - Vessels are required to adhere strictly to control directives, with a focus on preventing risky navigation in the affected areas [1] - **Warnings and Precautions** - A forecast indicates gusts of wind exceeding level 8 in the Pearl River Estuary, necessitating heightened vigilance from all vessels [1] - Anchored vessels must reinforce mooring equipment and maintain 24-hour personnel watch to prevent drifting [1] - In case of emergencies, vessels are instructed to report via VHF channel 16 or call the emergency hotline 12395 [1]

Core Points - A significant temperature drop is expected across multiple regions in China following a period of warming, with forecasts indicating a decrease of 8°C to 14°C, and in some areas, over 20°C [1][2] - The cold wave is predicted to impact various regions including Xinjiang, Inner Mongolia, Heilongjiang, and parts of southern China, with the lowest temperatures expected on the night of March 29 to the early morning of March 30 [1][2] Summary by Sections - **Temperature Changes**: The Central Meteorological Observatory has issued warnings for cold waves, strong winds, fog, and sandstorms, forecasting a drastic temperature drop across northern and southern regions of China [1] - **Public Advisory**: Meteorological experts advise the public to adjust their clothing according to the fluctuating temperatures and to be cautious of strong winds and potential hazards from falling objects in northern areas, while southern regions should be aware of severe convective weather [2]

Group 1 - The cold wave is expected to impact most regions of China from March 25 to 29, with temperature drops of 8 to 12°C nationwide, and some areas experiencing drops of 14 to 16°C, with local maximum temperature drops exceeding 20°C [2][3] - The cold wave will bring strong winds and dust storms to northern regions, with wind speeds reaching 4 to 6 levels, and gusts in some areas reaching 10 to 11 levels [3] - Areas south of the Huai River will experience strong convective weather, including light to moderate rain or thunderstorms, with localized heavy rain expected [4] Group 2 - The cold wave will lead to significant temperature fluctuations, with the minimum temperature line expected to be at 0°C in central North China to southern Shaanxi by the morning of March 30 [2] - Dust storms are anticipated in regions such as eastern and southern Xinjiang, central and western Inner Mongolia, and western Gansu, with some areas experiencing sandstorms [3] - Meteorological experts warn of health risks due to the cold wave and dust storms, advising the public to take precautions against respiratory diseases and to be cautious of low visibility affecting transportation [5]

Weather Impact Summary - A cold air mass continues to affect central and eastern China, with widespread rainfall expected in the south and the development of rain and snow in the north over the next two days [1][7] - In Beijing's Yanqing District, snowfall was reported, with temperatures expected to drop below 0 degrees Celsius [2][8] - Hebei Province experienced snowfall in Zhangjiakou and Chengde, with temperatures also falling below freezing, prompting traffic safety measures [3][9] - Qinghai Province saw new snowfall, with the maximum snow depth reaching 8 centimeters in Delingha, leading to traffic disruptions [4][11] - Gansu Province experienced a new round of cooling and precipitation, beneficial for soil moisture during the critical spring period for winter wheat [5][12] - Jiangxi Province faced severe convective weather, with strong winds causing significant damage to crops and infrastructure [6][13] - Hunan Province was hit by hailstorms, with the weather forecast indicating continued rain and temperature drops [7][13]