Core Viewpoint - The National Marine Forecast Center has issued a yellow warning for sea waves due to strong cold air affecting the eastern South China Sea and Taiwan Strait, indicating significant wave heights in various coastal areas [1] Group 1: Wave Warnings - From the afternoon of October 24 to the afternoon of October 25, wave heights of 3 to 5 meters are expected in the eastern South China Sea and Taiwan Strait, with a yellow warning level [1] - The coastal waters near Fujian will experience wave heights of 2.5 to 3.8 meters, also under a yellow warning level [1] - The southern coastal waters of Zhejiang will see wave heights of 2 to 3 meters, categorized under a blue warning level [1] Group 2: Forecast and Safety Measures - A 48-hour forecast indicates that from the afternoon of October 25 to the morning of October 26, wave heights of 2.5 to 4 meters are expected in the eastern South China Sea and Taiwan Strait [1] - The coastal waters near Fujian will experience wave heights of 2 to 3 meters, with a blue warning level [1] - The wave warning is expected to be lifted around noon on October 26 [1]

Core Points - The National Marine Forecast Center has upgraded the wave warning to orange and issued a storm surge yellow warning due to the combined effects of strong cold air and Typhoon "Fengshen" [1][2] - Significant wave heights of 3 to 5.5 meters are expected in the East China Sea, Taiwan Strait, and northern South China Sea from the afternoon of October 19 to the afternoon of October 20 [1] - Coastal areas in Fujian will experience waves of 3 to 4.5 meters, while Shanghai, Zhejiang, and eastern Guangdong will see waves of 2.5 to 3.5 meters [1] - Storm surge levels of 50 to 120 centimeters are anticipated along the coast from Nantong, Jiangsu to Zhangzhou, Fujian, and 30 to 70 centimeters from Chaozhou to Huizhou, Guangdong [2] - Yellow and blue storm surge warning levels have been issued for various cities in Zhejiang and Fujian provinces, as well as parts of Guangdong [2] Group 1 - The wave warning has been upgraded to orange, indicating severe conditions in specific coastal areas [1] - The expected wave heights pose significant risks for maritime operations, necessitating safety precautions [1] - The storm surge warnings highlight the potential for flooding and require emergency preparedness from local governments [2] Group 2 - The forecasted storm surge levels indicate a serious threat to coastal infrastructure and necessitate protective measures [2] - Local authorities are advised to organize vessels to return to port and reinforce aquaculture facilities [2] - Continuous monitoring and reinforcement of coastal defenses are essential to mitigate risks from the storm surge [2]

Core Points - Typhoon "Zhu Jie Cao" made landfall in Shanghai on July 30, 2023, as a tropical storm with maximum wind speeds of 9 levels (23 m/s) and a minimum central pressure of 978 hPa [1] - Significant wave heights of 3 to 4.5 meters were reported in the coastal waters of Shanghai and northern Zhejiang, with storm surges of 70 to 150 cm observed from Nantong, Jiangsu to Ningbo, Zhejiang [1] Wave Alerts - The National Marine Forecast Center issued an orange wave alert due to Typhoon "Zhu Jie Cao," predicting wave heights of 3 to 5.5 meters in the southern Yellow Sea and northern East China Sea from the night of July 30 to the daytime of July 31 [3] - Coastal waters near Shanghai are expected to experience wave heights of 3 to 5 meters, while southern Jiangsu and northern Zhejiang will see waves of 3 to 4.4 meters, with respective alert levels of orange and yellow [3] Storm Surge Alerts - A blue storm surge alert was issued, forecasting storm surges of 60 to 140 cm along the coast from Lianyungang, Jiangsu to Hangzhou Bay from the evening of July 30 to the daytime of July 31 [5] - Authorities are advised to prepare for storm surge defenses, including securing fishing vessels and reinforcing aquaculture facilities [5]

Core Viewpoint - The article discusses the impact of Typhoon "Butterfly" on the South China Sea and surrounding regions, highlighting the expected weather conditions and safety measures for maritime activities. Group 1: Typhoon Development and Forecast - The Central Meteorological Observatory issued a blue alert for Typhoon "Butterfly," which formed on June 11 and is expected to strengthen as it approaches the southern coast of Hainan Island, with landfall anticipated between June 13 early morning and noon at strong tropical storm to typhoon level (10-12 scale, 25-33 m/s) [1] - After making landfall, the typhoon may re-strike the western Guangdong to Guangxi coastal areas on the night of June 13, with expected wind speeds of tropical storm to strong tropical storm level (8-10 scale, 20-25 m/s) [1] Group 2: Weather Conditions and Warnings - From June 11 at 14:00 to June 12 at 14:00, winds of 6-8 scale and gusts of 9-10 scale are expected in the South China Sea, with the typhoon's center potentially experiencing winds of 9-10 scale and gusts of 11-12 scale [3] - Significant rainfall is forecasted for Hainan and Guangdong, with some areas experiencing heavy to torrential rain, necessitating preparations for typhoon impacts [5] Group 3: Safety Measures and Precautions - The Guangdong Provincial Flood Control and Drought Relief Headquarters issued a notice requiring all fishing vessels in the Guangdong sea area to return to designated safe zones by June 11 at 12:00, and to prepare for safe harboring [7] - The National Ocean Forecasting Center issued a blue alert for waves, predicting 3 to 5 meters of large to giant waves in the South China Sea from the night of June 11 to noon on June 12, with coastal areas experiencing 2 to 3 meters of medium to large waves [8]

Core Viewpoint - The National Marine Forecasting Center of the Ministry of Natural Resources has issued a yellow warning for sea waves due to the influence of strong cold air and cyclones, predicting significant wave heights in the Bohai Sea and Yellow Sea [1] Group 1: Wave Forecasts - From the night of April 12 to the daytime of April 13, wave heights of 3.0 to 4.5 meters are expected in the Bohai Sea and Yellow Sea [1] - The northern and eastern coastal areas of Shandong will experience waves of 3.0 to 3.8 meters, with a yellow warning level for nearshore waters [1] - The southern coastal areas of Hebei and Liaoning will see waves of 2.0 to 3.0 meters, classified as medium to large waves, with a blue warning level for nearshore waters [1] Group 2: Subsequent Wave Predictions - From the night of April 13 to the daytime of April 14, wave heights of 3.0 to 5.0 meters are anticipated in the Bohai Sea and Yellow Sea [1] - The southern coastal areas of Liaoning and the northern and eastern coastal areas of Shandong will experience waves of 2.5 to 3.4 meters, with a blue warning level for nearshore waters [1]