In the past two days, the subtropical high pressure in the western Pacific Ocean has strongly controlled many places in the south of China, resulting in the autumn tiger in the south of China is roaring - there is a strong and persistent high temperature weather in the middle and lower reaches of the Yangtze River. Of course, from September 2, cold air from the Yellow Sea infiltration south into Jiangsu, Zhejiang and Shanghai, Jiangsu, Zhejiang and Shanghai thunderstorms erupted, thunderstorms in Jiangsu, Zhejiang and Shanghai many places the temperature has dropped, but the range of this cold air going south is quite limited, from the hour of 11 a.m. on September 3, many places in the south of Hunan, Jiangxi, and zhejiang are still immersed in a hot atmosphere today.
In fact, the subtropical high pressure, which caused the autumn tiger in the south of our country, has only weakened under the cold air offensive, but it is not yet time to completely withdraw from our country. Therefore, cold air to central and southern Zhejiang, Jiangxi, Hunan, Fujian and other places can only be said to be wangmei thirst quenching, completely without the possibility of cooling, is still quite hot, especially in Hunan Jiangxi and other places, the high temperature may further reach the peak this weekend, the local approach to 40 degrees.
However, the so-called "grasshoppers after autumn can not bounce for a few days", the subtropical high pressure in autumn is no longer as impenetrable as in summer, and the cold forces in the middle and high latitudes are also strengthening, the cold air is becoming more frequent, and the total annihilation of high temperatures seems to be not far away. The supercomputer's predictions suggest that from Sept. 5 onwards, the mid-latitude westerly wind belt will oscillate violently, pushing a wave of cold air southward.
Although there is a subtropical high pressure in the south, the strong cold air still sees the penetration of the needle, so that although it will not directly pull the temperature in many parts of the south to autumn, the hot and hot temperature that is as strong as before is indeed going to weaken.
For example, the forecast of the Central Meteorological Observatory pointed out that around September 8, under the large-scale penetration of cold air, the high temperature weather in southern China will completely collapse, the temperature in the Yangtze River Basin will return to about 30 degrees, and the 35-degree area in south China will become very few.
And when the southern autumn tiger is about to weaken or even fully end, a bad news has also come - the supercomputer's forecast points out that the tropical low-value system at the low latitudes of the western Pacific Ocean is becoming active, and a large number of typhoon lines appear in the collective forecast, and many of them have pointed to China, which means that there may be new typhoons brewing, and there is a possibility of affecting our country.