With the warming, the freezing line has retreated to the Yangtze River basin on the morning of the 27th, returning to the normal position of the same period of the year.
In the next few days, although the cold in the south remained in the morning and evening, the warmth in the afternoon rebounded on a large scale, and the warmth was not as good as in late December and more like early March. From the maximum temperature range of 15 and 20, it is even greater than the normal early March.
Guiyang, Changsha, Nanchang and other places that have already entered winter, in the next few days of warming, feel as if it is back to autumn, or like spring.
At the same time, the strongest fog and haze process in North China, Huanghuai and other places since the autumn and winter of this year was online, and the most affected period was from the night of the 29th to the morning of the 30th.
*The Meteorological Observatory predicts that from the 28th to the 30th, the atmospheric diffusion conditions in the central and southern parts of North China, the central and western Huanghuai Mountains, and the Fenwei Plain will be poor, with light to moderate haze. Among them, Tianjin, central and southern Hebei, western Shandong, northern Henan and other places have severe haze.
Under the combined influence of high humidity and persistent unfavorable atmospheric diffusion conditions, from the night of the 27th to the morning of the 28th, there was heavy fog in parts of southeastern Hebei, central and western Shandong, eastern Henan, central and northern Anhui, Jiangsu, Shanghai, and northern Zhejiang. Among them, some areas in central Shandong and central and eastern Jiangsu have strong dense fog with visibility less than 200 meters, and there are extremely strong dense fog with visibility less than 50 meters locally.
Judging from the month-by-month data, the month with the highest number of foggy days in China is December, followed by November and January, and the least month is May. This is because the type of fog in the inland areas of our country is mainly radiation fog. In autumn and winter, the nights are long, the temperature is low, and the ground radiative cooling at night is easy to condense the water vapor in the ground atmosphere, thus forming radiation fog.
In addition, the precipitation development in the eastern part of southwest Japan to the Jianghuai and Huanghuai regions has increased, and the rain is generally not large, mainly light rain and snow.
Here is a special reminder that Shandong, Jiangsu, Anhui, Henan and other places have a long impact on fog or haze weather, and superimposed precipitation, coinciding with the peak travel period in the early part of the New Year's Day holiday, with a large passenger flow, we must pay attention to traffic safety.
This guide to safe driving in foggy days is to be mastered
Under the influence of a "New Year's Eve" cold air will disperse the fog and haze, and from the afternoon of the 30th, the fog and haze in the above areas will gradually weaken and dissipate from north to south.
From December 30 to January 1, 2024, the temperature in some parts of the central and eastern parts of the country will drop by 4 6, and some areas in the northeast of Inner Mongolia, the northeast region, and the eastern part of Jiangnan will drop by more than 8, accompanied by 4 5 northerly winds, and 6 7 gusts in some parts of the north.
For example, in Harbin, the maximum temperature on the 27th is about -10, and the cold air will gradually warm up, and it will rise to -5 before the cold air on the 30th, but it will plummet to -12 on the 31st, and the minimum temperature will also fluctuate greatly.