As soon as the work was resumed after the holiday, a round of cold waves began to affect our country from west to east. The originally warm area will also experience strong cooling and rain and snow weather in the past few days. **The Meteorological Observatory issued a cold wave, fog, strong wind and sandstorm warning at the same time on the 19th.
According to the forecast, compared with the rain and snow freezing process before the holiday, the overall intensity and persistence of freezing rain in the process of cold wave and large-scale rain and snow low temperature freezing weather are not as good as last time, but the scope and intensity of rain and snow in the two processes are basically the same, and the cooling range is larger, the low temperature duration is longer, the impact range of freezing rain is wider, and the rainfall in the south is stronger.
The large cooling amplitude and the drastic transition between cold and warm are the significant characteristics of this cold wave. Monitoring shows that Xinjiang, which was the first to be affected by the cold wave, dropped by more than 20 in 24 hours in many places from the 17th to the 18th, and the local drop exceeded 30, and the minimum temperature at the Qinghe National Meteorological Station in Altay Prefecture reached -433℃。
In recent days, the temperature in the south has continued to rise rapidly, and on the 18th, more than 30 weather stations in Hunan, Hubei, Jiangxi and other places have exceeded the maximum temperature extreme value in the same period in February, and the local temperature in Zunyi, Tongren, southeast Guizhou and Xiangxi and Loudi in Hunan exceeded 30. It is expected that from the 19th to the 22nd, there will be a great change in cold and warm in the central and eastern regions. Northeast China, southern North China, Jianghan, Jiangnan, the eastern part of Southwest China, and northern South China will be cooled by 12 to 16, and the local temperature in southern Guizhou and southern Hunan can reach more than 20. The maximum temperature in some areas of Shanxi, Henan, Shandong, Hubei and other places can fall to the lowest in the same period in history, which has a certain extremity.
Around the 23rd, the minimum temperature 0 line will be pressed south to the central and southern parts of Jiangsu and Anhui to the southern part of Hunan and southern Guizhou. The average temperature in most parts of the country will be lower than that of the same period in normal years, among which Shaanxi, North China, Huanghuai, Jianghuai, Jianghan, and the western part of Jiangnan will be lower4 to 6. Experts said that this low temperature state is expected to continue until about the 26th, and the southern region will not warm up until the 28th.
In terms of precipitation, Xu Jun, chief forecaster of the ** Meteorological Observatory, said that the rain and snow weather will enter a strong period from the 20th. There were heavy snowfalls in southeastern Shaanxi, eastern Shanxi, central and southern Henan, southern and eastern Shandong, and heavy snowstorms in southeastern Shandong; There are heavy to heavy rains in Jianghuai, Jiangnan, and northwest South China, and local heavy rains in northern Jiangxi.
The rain and snow phases were complex, and the southern region was accompanied by strong convective weather. At the same time, the impact of freezing rain is widespread, and some areas are persistent. It is expected that from the 20th to the 25th, there will be a wide range of freezing rain or ice particles in Hubei, Hunan, Guizhou, Henan, southern Shandong, northern Jiangsu, northern Anhui and other places, affecting an area of up to 570,000 square kilometers, and freezing rain in Hunan, Guizhou, Hubei and other places may last for 3 to 5 days.
Song Jianyang, a senior engineer at the Public Meteorological Service Center of the China Meteorological Administration, analyzed that the rain and snow weather from the 20th to the 23rd will further affect North China, Huanghuai and its southern regions, and the Beijing-Taiwan, Beijing-Hong Kong-Macao, Beijing-Shanghai and other highways passing through these areas have a high risk of snow and ice on the roads. In addition, the visibility of local roads in the central and southern parts of East China is low, and low-lying road sections and tunnel culverts are also prone to water accumulation, which affects traffic efficiency.
Weather experts advise the public to keep an eye on the latest weather forecasts and avoid snowfall and freezing rain when traveling. If you need to travel by car, pay close attention to the road conditions and take anti-skid measures according to the situation; When taking high-speed rail or airplane, you should check the status of trains and flights in time and make travel arrangements. At the same time, low temperature weather is easy to induce cardiovascular and cerebrovascular and respiratory diseases, and the public should take cold and warm measures in time to strengthen health protection.
* Xinhua News AgencyWritten by Huang Yao.
Edited by Gao Chenchen.
Process Editor: Weili Liu.