Core Viewpoint - The article reports on the impact of a low-pressure system in the East China Sea, predicting significant wave activity and issuing a blue warning for coastal areas in Jiangsu, Shanghai, and Zhejiang [1] Group 1: Weather Impact - From July 28 to 29, the East China Sea is expected to experience large to giant waves due to the low-pressure system [1] - The National Marine Forecasting Center has issued a blue warning for wave conditions in the coastal waters of Jiangsu, Shanghai, and Zhejiang [1] Group 2: Wave Predictions - Waves of 3 to 5 meters are anticipated in the southern Yellow Sea and East China Sea from the night of July 27 to the day of July 28 [1] - Coastal areas in southern Jiangsu, Shanghai, and northern Zhejiang are expected to see waves ranging from 2 to 3.4 meters [1] Group 3: Safety Measures - Vessels operating in the affected areas are advised to take safety precautions [1] - Relevant coastal units are urged to implement measures to avoid and mitigate wave impacts [1]

Core Viewpoint - The article reports on the approaching Typhoon "Wipha" and the associated warnings issued by the National Marine Forecasting Center, highlighting the expected severe sea conditions and necessary precautions for coastal areas in Guangdong, Guangxi, and Hainan [1] Group 1: Typhoon Impact and Warnings - Typhoon "Wipha" is expected to bring significant wave activity to the coastal waters of Guangdong, with warnings of large to giant waves [1] - The National Marine Forecasting Center has issued an orange alert for wave conditions and a blue alert for storm surges due to the typhoon [1] Group 2: Specific Wave and Storm Surge Predictions - Northern South China Sea is forecasted to experience waves of 5 to 7 meters, categorized as giant to stormy [1] - The Beibu Gulf is expected to see waves of 3 to 5 meters, classified as large to giant [1] - Coastal waters of Guangdong will experience waves of 3 to 5 meters, with an orange warning level [1] - Coastal waters of Guangxi will see waves of 2.5 to 3.5 meters, with a yellow warning level [1] - Coastal waters of Hainan will have waves of 2 to 3 meters, with a blue warning level [1] Group 3: Storm Surge Predictions - Coastal areas from Shantou to Huizhou in Guangdong will experience storm surge increases of 50 to 90 centimeters [1] - Coastal areas from Shenzhen to Yangjiang in Guangdong will see storm surge increases of 100 to 200 centimeters [1] - Coastal areas from Maoming to the eastern coast of Leizhou Peninsula in Guangdong will have storm surge increases of 60 to 120 centimeters [1] - Northeastern coastal areas of Hainan will experience storm surge increases of 30 to 70 centimeters [1]

Core Viewpoint - The South China Sea tropical depression has intensified into the first typhoon of the year, named "Butterfly," with expectations of further strengthening [1] Weather Warnings - The Hainan Meteorological Bureau issued a level four typhoon warning on June 11, 2025, at 9:30 AM, indicating a high likelihood of landfall in the southeastern coastal areas of Hainan Island [1] - Heavy rainfall is expected across most of Hainan Island from June 11 to June 13, with risks of urban flooding, geological disasters, and small river floods [1] Wind and Wave Conditions - Coastal areas are forecasted to experience gusts of 8 to 11 levels [1] - The Hainan Marine Forecast Center issued a blue (level four) wave warning, predicting waves of 3.5 to 4.5 meters in the eastern and southern waters of Hainan Island, and 2.5 to 3.5 meters in other nearby areas [1] - Nearshore waters in Wenchang, Qionghai, Wanning, Lingshui Li Autonomous County, and Sanya are expected to see waves of 2 to 3 meters [1]