The area of ​​smog has covered 1.42 million square kilometers and will continue to increase fromnight tonight.

Since December 16, the central and eastern parts of China have experienced the largest fog and haze weather this winter. As of the afternoon of the 18th, the weather affected area has reached 1.422 million square kilometers. It is expected that today's night to tomorrow will be the most serious period of the current round of weather. Tonight, with the advent of precipitation, the pollutants will be removed to some extent. On the 21st, the fog will gradually weaken or dissipate from north to south. . Since the 16th, Beijing, Hebei, Tianjin and other places have been shrouded in smog. As of yesterday afternoon, the area affected by 霾 has reached 1.422 million square kilometers. According to the monitoring data, from 05:00 to 19:00 on the 18th, moderate sputum appeared in the central and southern parts of North China, Huanghuai, Shaanxi Guanzhong area, and the southeastern part of Northeast China. PM2.5 monitoring showed that the concentration of PM2.5 in most of the above areas exceeded 115 μg/m3, and there was moderate to severe pollution. Among them, PM2.5 concentration in central and southern Beijing, Tianjin, central and southern Hebei, southwestern Shanxi, and Shaanxi Guanzhong More than 250 micrograms per cubic meter, serious pollution. Among them, from the 16th, Shijiazhuang in Hebei Province has experienced serious pollution for 47 consecutive hours, and the AQI index frequently explodes.
The Central Meteorological Observatory estimates that from 08:00 to 20:00 on the 19th, central and southern Beijing, Tianjin, central and southern Hebei, south-central Shanxi, most of Shandong, most of Henan, Guanzhong of Shaanxi, western Hubei, northern Jiangsu, and central and western Liaoning, There are moderate sputums in central Jilin and other places, including parts of southern Beijing, Tianjin, central and southern Hebei, north-central Henan, southern Shandong, southwestern Shanxi, Shaanxi Guanzhong, western Hubei, northern Jiangsu, central Liaoning, and central Jilin. The area has severe sputum and the minimum visibility is about 1 km. The Central Meteorological Observatory continued to issue an orange warning at 6:00 on December 19.
In addition, on the morning of the 19th, in the south of Beijing, Tianjin, central and eastern Hebei, southern Shandong, central and northern Henan, northern Jiangsu, southwestern Heilongjiang, central and western Jilin, western Liaoning and southern, there are heavy fogs. In some parts of Hebei, central and eastern Shandong, western and northeastern Shandong, central and northern Henan, northern Jiangsu, southern Liaoning, western Jilin, and southwestern Heilongjiang, there are dense fogs with visibility less than 500 meters, and local visibility is less than 200 meters. Strong fog. From tomorrow, affected by the high-altitude trough and the low-level shear line, China's central and eastern regions will have a large-scale precipitation process from west to east. Huanghuai, Jianghan, Jianghuai, Jiangnan, South China and other places will have small to moderate rain, South China. Heavy rain or heavy rain occurs in parts of the east. There will be small to medium snow (sleet) in the eastern part of the northwestern region and the central and western parts of North China.
Precipitation in the central and southern parts of North China, Huanghuai and other places will have a certain effect on the removal of pollutants. It is expected that there will be a certain degree of reduction in the nighttime on the 20th, but the increase in humidity may lead to a decrease in visibility. From the night of the 21st, the haze weather will gradually weaken or dissipate from north to south.
Experts suggest that the fog and haze weather process lasts for a long time, has a wide range of influence, and has high intensity. In some cases, the visibility is low, which will have a great impact on human health and transportation. It is necessary to guard against the weather and human health and low visibility to traffic. The adverse effects of transportation.

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