Why is there such an extreme temperature change from June 5438 to February 2020?

Because in February 2020, there were two cold air processes affecting China, namely from June to February 2020, from June 2020 to June 2020 (national strong cold air) and from February 29, 2020 to June 5438, 2026. These two times are national cold air processes, with large influence range and strong cold air intensity.

Since February 65438+2020, the Siberian high and the strong winter monsoon in East Asia have caused the strong cold air brought by the strong northwest wind to invade Beijing and North China frequently. This extreme low temperature weather process is the result of cooling again on the basis of the continuous low temperature caused by the cold wave weather process from 65438+February 28 to 65438+February 30, 2020. The windy weather makes the wind-cold superposition effect obvious.

Extended data:

As far as the whole country is concerned, due to the influence of strong cold air, large-scale gale and strong cooling weather began to appear in the central and eastern regions of China on 20021year1October 6. A cold wave will sweep across the country. Affected by the cold wave, the Shandong Peninsula and Dalian, Liaoning Province experienced light to medium snow and local heavy snow.

Snowfall occurred in parts of Sichuan Basin, Guizhou, southern Hunan, central Jiangxi and western Zhejiang, with snowfall of 8 ~17mm in Yibin and Luzhou, Sichuan. Freezing rain occurred in central and southern Guizhou, southeastern Hunan and central Fujian.

Cold air activities will be more frequent, and the temperature in some areas will be low; According to the forecast of the National Climate Center, there will be cold air activity in China in the later period, and the temperature in some areas may continue to be low.

References:

China News Network-Why is it so cold this winter? Is it "warm winter" or "cold winter"?