Does midsummer also have the influence of cold air?, The highest temperature has dropped below the 35 ℃ high temperature line, and Shanghai's "fever reduction" strength this week | cold air | high temperature
Last week, there was a feeling of high-temperature anger brushing. Starting from August 10th, the highest temperature in Shanghai has exceeded the 35 ℃ high temperature line for four consecutive days. As of yesterday, there have been 18 high-temperature days in Shanghai this year.
The good news is that the weather has reversed this week and Shanghai is gradually reducing its fever. Because cold air from the north is coming.
Is there cold air in midsummer? This is true, but the presence is not as strong as in winter.
Cold air and warm air are defined by the difference in temperature levels, and air located in low-temperature areas is called cold air. China is affected by cold air throughout the year, and September to April of the following year is the most active and strong period of cold air.
![Does midsummer also have the influence of cold air?, The highest temperature has dropped below the 35 ℃ high temperature line, and Shanghai's "fever reduction" strength this week | cold air | high temperature](https://a5qu.com/upload/images/5a5d8843597e350786c604fffa4ea537.png)
The cold air in summer also comes from Siberia, with generally weak strength and weak winds. After cooling down, the temperature is not low, so it is not easy for people to notice. In summer, cold air is the main driver of rainfall, such as the pre flood season in South China, the rainy season in Jiangnan, and the rainy season in North China, all of which are the result of the combined action of southward cold air and northward summer monsoon.
The cold air this time is a bit powerful. From west to east, wherever it goes, it will gradually lower the temperature in Xinjiang, Gansu, Ningxia, and western Inner Mongolia. The cumulative cooling in many areas will generally exceed 10 ℃, and in some areas, it can reach over 20 ℃. The highest temperature in Urumqi last Saturday was still 36 ℃, but tomorrow it will drop to 19 ℃, almost halving. Many areas in the northwest region have officially entered autumn during the beginning of autumn, and this cooling may start the autumn process.
The cold air traveled all the way south to Shanghai, weakening its strength but enough to extinguish the high temperatures. Starting today, the hot weather in Shencheng has eased, with the highest temperature stabilizing at 31 ℃ to 33 ℃. Due to frequent convergence of cold and warm air and increased rainfall, it is expected that Shanghai will experience a significant precipitation process around Thursday due to the influence of the low vortex shear line.