AI-generated summary
Tropical disturbances in the South China Sea and easterly winds transporting water vapor jointly affect rainfall in Hainan and Guangdong. In the north, the weather becomes cooler and drier due to the influence of cold air.
China Weather Network News Under the combined influence of tropical disturbances in the South China Sea and easterly winds transporting water vapor, rainfall will be significantly intensified in Hainan, Guangdong and other places today and tomorrow (September 12-13). There will be heavy rainstorms in local areas. It is necessary to guard against secondary disasters that may be caused by sustained heavy rainfall. In the north, precipitation is scarce in most areas, and many places are ushering in good autumn weather, suitable for travel.
There will be heavy rains in Hainan and Guangdong today and tomorrow, and the autumn air will be crisp in many places in the north.
Yesterday, although the rainfall in the southwest was widespread, it was mostly light rain or showers. At the same time, rainfall increased in Hainan. Monitoring shows that moderate to heavy rains occurred in some areas in southeastern Hainan, western Yunnan, and southern Tibet, and local heavy rains or heavy rains occurred in Wanning and Lingshui, Hainan.
Currently, a tropical disturbance is developing in the South China Sea. Affected by it and the easterly wind transporting water vapor, rainfall will be significantly intensified in Hainan, southern Guangdong and other places today and tomorrow, with heavy rains in some areas and heavy rains locally. As for the north, there will be little rainfall in most areas today and tomorrow, and many places will usher in good autumn weather.
Specifically, the Central Meteorological Observatory predicts that today, there will be moderate to heavy rains in parts of northeastern Inner Mongolia, northwest Heilongjiang, western mountainous areas of southern Xinjiang, eastern Qinghai, southwestern Gansu, northern Sichuan Plateau, southeastern Tibet, western Yunnan, Hainan Island and other places. Among them, there will be heavy rains in parts of northeastern Inner Mongolia, northwest Heilongjiang, central and eastern Hainan Island and other places, and local heavy rains in the southeastern Hainan Island.
Tomorrow, there will be moderate to heavy rains in parts of central and eastern Heilongjiang, southern Sichuan Plateau, southeastern Tibet, eastern and southern Guangdong, southeastern Guangxi coast, Hainan Island and other places. Among them, there will be heavy rains and local heavy rains in some areas of southwestern Guangdong, eastern and southern Hainan Island and other places.
The day after tomorrow, the rainfall in Guangdong will weaken, and the heavy rainfall in Hainan will come to an end on the 15th. It is expected that there will be moderate to heavy rains in parts of eastern Tibet, northern Sichuan Plateau, northern Sichuan Basin, southern Zhejiang, northern Fujian, central and western Guangdong, southern Guangxi, Hainan Island and other places. Among them, there will be heavy rains and local heavy rains in parts of southern Hainan Island and other places.
Meteorological experts reminded that the heavy rainfall in Hainan will last for a long time, especially in parts of the eastern part of the country where the cumulative rainfall may exceed 250 millimeters. Relevant departments and the public need to guard against secondary disasters that may be caused by continued heavy rainfall. Winds are strong in the coastal areas of South China and the South China Sea, and attention should be paid to the adverse effects on ship navigation.
The "inflammation value" in the south is increasing, and the temperature difference between day and night in many places in the north is as big as two seasons in one day.
After the "flash" of autumn in many places in the south, hot weather developed again yesterday as the cold air came to an end. At 14:00 yesterday, the temperature in Chaozhou and Jieyang, Guangdong reached above 33°C. Superimposed with high humidity, the body temperature exceeded 36°C.
Starting today, the temperature in more places from Jiangnan to the southwest will also rise to above 30°C, and high temperatures may still appear in northern Jiangxi. From the 14th to the 16th, the heat in southern North China and the Huanghuai River will also briefly return. Like Jinan, the highest temperature can reach 32°C on the 15th.
In the next few days, the cold air in the north will still be relatively active, but the affected area will be relatively northerly. As the cold air becomes active and the summer monsoon withdraws from the south, the weather in the north becomes drier and the temperature difference between day and night widens. In many places, the temperature difference between day and night will exceed 10°C or even 15°C, making one day feel like two seasons. Everyone needs to add appropriate clothing to hydrate and moisturize.
AI outlook — possibilities, not facts
The rainfall in Guangdong will weaken the day after tomorrow, and the heavy rainfall in Hainan will end on the 15th.
Likely · Within days
The temperature difference between day and night in many places in the north will exceed 10℃ or even 15℃
Likely · Within days
Affected by the tropical low pressure, there will be heavy to heavy rains in Hainan Island, Guangdong coastal areas and other places in the next three days, with local heavy rains. Rains are frequent in West China, and secondary disasters need to be guarded against. Most of the north has little precipitation, and the temperature difference between day and night exceeds 10°C. To experience the crisp autumn air, you need to wear more clothes in the morning and evening to prevent colds.

The Hainan Provincial Meteorological Observatory predicts that due to the combined influence of tropical low pressure and cold air in the South China Sea, Hainan Province will have a strong wind and rain weather process from the 12th to the 15th. There will be heavy rains to heavy rains and local heavy rains in the central and eastern regions. Sea gusts can reach level 8 to 9. Risks such as floods and geological disasters need to be guarded against.

The tropical disturbance in the South China Sea intensified into a tropical depression on the morning of the 12th. The Hainan Provincial Meteorological Bureau issued a Level 4 typhoon warning and a Level 4 heavy rain warning. The Hainan Provincial Disaster Prevention, Reduction and Relief Committee initiated a Level 4 flood and wind prevention emergency response, requiring some cities and counties to immediately initiate emergency response. Other cities and counties strengthened consultations and judgments, and issued notices on defense work.
The Central Meteorological Observatory forecast that there will be heavy rainfall in Hainan, Yunnan, Tibet and other places yesterday, and there will be wind and rain in southern South China and the southern sea in the next three days. Hainan has strong local rainfall and needs to prevent secondary disasters from heavy rain; it will be rainy in West China and Tibet; eastern Inner Mongolia, Heilongjiang, Jilin and other places need to prevent strong convective weather such as local wind and hail.

Today and tomorrow, the northeast monsoon will gradually weaken, and the water vapor will decrease and the temperature will rise; from Monday, the northeast monsoon will strengthen again, and the north and northeast will turn to cloudy and sometimes cloudy showers, and the temperature will drop slightly. The central, southern and southeastern areas will have little impact, and it will still be cloudy to sunny with local brief thundershowers in the afternoon, and it will be hot during the day and have a large temperature difference between morning and evening.

The Central Meteorological Administration pointed out that the northeast monsoon weakened today, and it was still slightly cooler in the morning and evening in various places. On the windward side, there were local brief showers on the north coast of Keelung, the eastern half, the Hengchun Peninsula and greater Taipei. It was cloudy to sunny in other areas, and there were also local showers in the afternoon. The temperature difference between day and night was large in the western half, with daytime temperatures rising to 32 and 33 degrees south of Taoyuan, and high temperatures in the eastern half. Maintained at 30 and 31 degrees; in terms of air quality, the central part is "orange alert", the north, Zhumiao, Yunjianan, Gaoping and other places are "average", Yilan and Huadong are "good"; the northeast monsoon will increase or decrease in the next week, the high temperature in northern Taiwan will drop slightly, and there will still be local showers in the afternoon in many places. The development of the Pacific low pressure in the later period needs to be paid attention to.