The weather is so cold recently, is it the result of cold air going south? When will it get warmer?

After 20 days, the temperature in Changsha will obviously rise.

According to the comprehensive analysis of the latest meteorological data, from the night of 17 to the 20th, affected by the high altitude trough, the strong cold air on the ground and the warm and humid airflow in the southwest of the middle layer, there was a low-temperature rain and snow process in our province, in which the snowfall in southeast Hunan was obvious and the mountainous area was frozen. 2 1-22 With the southward fall of cold high pressure, the weather in our province improved from north to south, and the temperature rose. Generally speaking, due to the influence of strong cold air on the ground before the 20th, our province will maintain a period of low temperature, rain, snow and freezing weather, with freezing mainly occurring in western Hunan and southern Hunan.