On June 30, the North of Vietnam will continue to be affected by weather patterns causing heavy rain, particularly concentrated in the morning, evening, and night. There will be localized areas experiencing very heavy rainfall along with dangerous weather phenomena such as tornadoes, lightning, and strong winds.

According to the National Center for Hydro-Meteorological Forecasting, the weather forecast for June 30 indicates that:

• Hanoi: The lowest temperature will range from 25 to 27 degrees Celsius, while the highest will be between 31 and 33 degrees Celsius. Rainfall is expected to occur, especially in the evening and night, with the potential for tornadoes and lightning.
• Northwest Region: Temperatures will range from 23 to 26 degrees Celsius, with some areas dropping below 22 degrees Celsius. The maximum temperature will be between 30 and 33 degrees Celsius. Rain and thunderstorms are expected, particularly in the morning and evening.
• Northeast Region: The lowest temperatures will be between 24 and 27 degrees Celsius, with mountainous areas experiencing temperatures below 23 degrees Celsius. The highest temperatures will range from 30 to 33 degrees Celsius. Rain and thunderstorms are expected, particularly in the morning and evening.
• From Thanh Hoa to Hue: The lowest temperatures will be between 24 and 27 degrees Celsius, while the highest will be 32 to 35 degrees Celsius in the north and 35 to 37 degrees Celsius in the south. There will be sunny weather during the day, with scattered rain and thunderstorms expected in the evening.
• Central Coastal Region: The lowest temperatures will be between 24 and 27 degrees Celsius, and the highest will reach 35 to 36 degrees Celsius in the north, with some areas exceeding 36 degrees Celsius. The weather will be sunny, with scattered rain and thunderstorms expected in the evening.
• Central Highlands: The lowest temperatures will range from 20 to 23 degrees Celsius, while the highest will be between 28 and 31 degrees Celsius. Rain and thunderstorms are expected, especially in the evening.
• Southern Region: The lowest temperatures will be between 24 and 27 degrees Celsius, with the highest reaching 31 to 34 degrees Celsius. Scattered rain and thunderstorms are expected, particularly in the evening.

In Ho Chi Minh City, the lowest temperature will be between 25 and 27 degrees Celsius, and the highest will be between 32 and 34 degrees Celsius. Rain and thunderstorms are expected in the evening.

Additionally, the weather forecast for the seas indicates that on June 30, the waters from Khanh Hoa to Ca Mau and the western area of the South China Sea will experience southwest winds at levels 5 to 6, with gusts up to levels 7 to 8, causing rough seas. Wave heights are expected to reach 1.5 to 2.5 meters.

Overall, the National Center for Hydro-Meteorological Forecasting warns that all vessels operating in the aforementioned areas are at high risk of being affected by strong winds, large waves, and tornadoes.