Xiangbei plummeted 12℃! Can Hunan enter autumn this time?

North Hunan plummeted 12℃, and Hunan failed to enter autumn this time.

During the night of September 18, 2023 to 2 1, there was a process of cooling, rainfall and increasing wind in northern Hunan, and the maximum temperature dropped from 12℃ to 14℃. Looking at this posture, many people think that Hunan should also be able to take out long sleeves and coats for autumn. However, according to the forecast of the Provincial Meteorological Observatory, the duration of this process is not long, only 2 to 3 days. The subtropical high still strongly controls South China, and this time the rainfall in northern Hunan has cooled down. After that, it will turn cloudy, so the possibility of this fall is relatively small.

Looking back at the time of autumn in previous years, Hunan generally entered autumn from west to east and from north to south from late September to early October of 10. Xie Yijun predicted that the autumn in Hunan will be postponed as a whole this year. According to the latest forecast of the provincial climate center, the average temperature in Hunan will be 0.5℃ to 1℃ higher than normal this autumn (September to165438+1October). In terms of rainfall, the rainfall in autumn shows a trend of less before and more after. Compared with the same period of normal years, the rainfall in northern Hunan is slightly normal, and that in central Hunan is 20% to 30% more.

Climate introduction of Hunan province;

Hunan belongs to the continental subtropical monsoon humid climate, which has three characteristics: first, light, heat and water resources are abundant, and their high values are basically synchronous. Second, the climate changes greatly in a year. It is hot in Leng Xia in winter, changeable in spring, sudden drop in autumn, rainy in spring and summer, and drought in autumn and winter. The climate changes greatly from year to year. Third, the most obvious vertical climate change zone is the mountainous area surrounded by mountains on three sides. Especially in the mountainous area of southern Hunan.

According to the statistics of meteorological stations in various counties of Hunan Province, the average annual temperature is generally 16 ~ 19℃. In winter (65438+ 10), the average temperature in Leng Yue is above 4℃, and the average number of days when the average annual daily temperature is below 0℃ is less than 10 days. The average temperature in spring and autumn is mostly between 16 ~ 19℃, and the temperature in autumn is slightly higher than that in spring. The average temperature in summer is mostly between 26℃ and 29℃, and it can be as high as 30℃ in Hengyang area.

Hunan is rich in heat, and the average daily temperature in most areas ranges from 5600℃ to 6800℃ through the active accumulated temperature above 0℃. The active accumulated temperature above 10℃ is 5000 ~ 5840℃ and can last for 238 ~ 256 days. The active accumulated temperature above 15℃ is 4 100 ~ 5 100℃, and it can last 180 ~ 208 days; The frost-free period is 253 ~ 3 1 1 day. Hunan's heat conditions are second only to Hainan, Guangdong, Guangxi and Fujian, close to Jiangxi and better than other provinces.

The above contents refer to Baidu Encyclopedia-Hunan.