Cold air has arrived and the local temperature will drop by more than 8℃. Why is the feeling of heat increasing instead of decreasing in many places in the south?

Today, the heavy rainfall in Hainan finally ended. In the three days from tomorrow, there will be more rain in the eastern part of Northwest China, North China, Northeast China, Huanghuai and other places. Among them, there will be heavy rain or heavy rain in Sichuan and Shaanxi. For North China and Northeast China, due to poor water vapor conditions, the rainfall intensity is generally weak, with mainly light rain, which can have a certain moistening effect.

At the same time, a cold air will also appear in the north. Under its influence, for the next three days, most areas will have a temperature drop of 4°C to 6°C, with a local drop of 8°C to 12°C in central and eastern Inner Mongolia. It will also be accompanied by strong winds of magnitude 4 to 5 and gusts of magnitude 6 to 8. In the next few days, the temperature will fluctuate greatly in many places in the north, and the temperature difference between day and night is large. Friends can wear short sleeves or thin long sleeves during the day, and they will also need to wear jackets or cotton-padded jackets in the morning and evening.

Although cold air has arrived, for many places in the south, the feeling of heat has not decreased but increased. Mainly because this cold air is located far north, and according to the situation field forecast, the contour lines at mid- and high latitudes are relatively flat, so the cold air is not easy to gather, the intensity will not be very strong, and it will not move southward in a large scale. Moreover, the subtropical high pressure is significantly stronger. Not only does Line 588 control the central and southern parts of Jiangnan and South China for a long time, but Line 592 (the thermal core area) is also seen during some periods.

Therefore, the range of maximum temperatures above 30°C in the south will expand tomorrow and the day after tomorrow. Heat is still present in Changsha, Nanning, Haikou, Guangzhou, Fuzhou and other places. We cannot rule out the occurrence of scattered high temperatures in South China and southern Jiangnan. Although he is not a ferocious "Autumn Tiger", he is still a pestering "Autumn Little Tiger".

Judging from the minimum temperature dividing line: the 15℃ and 20℃ lines in the south rise to the north; the 0℃ and 10℃ temperature lines in the north fall to the south. The gap between cold and warm weather between the north and the south has further widened, creating a scene of "winter and summer coexisting".

At sea, the eye of Typhoon No. 29 "Little Bear" has become increasingly clear. It has strengthened to severe typhoon level and is expected to reach super typhoon level in a short time. If realized, the peak intensity of the three typhoons generated in October this year will all reach the super typhoon level, which also reflects the strong intensity of autumn typhoons. On the southeast side of "Little Bear", it can be seen that convection is active in the intertropical convergence zone, and new typhoons may be born in the future, so stay tuned.