The fifth round of widespread cold wave this winter is coming
Cold wave is a natural disaster that we are all familiar with. At the same time, cold wave will also bring many disasters. So what disasters will the cold wave cause? Is the fifth round of widespread cold wave coming this winter? Regarding this question, many friends want to know the answer. Let’s find out quickly.
What kind of disasters will a cold wave cause?
When a cold wave passes, it is often accompanied by strong winds, rapid cooling, rainfall, snow and other weather conditions. After the cold wave, severe freezing or frost will occur again. Cold wave strong winds not only put fishing boats at sea or in rivers and lakes at risk of capsizing and killing people, but they can also break trees, destroy houses, and blow off ripe fruits, causing harvest losses. Cold wave is disastrous weather in the winter half of the year. After autumn, the cold air moving from the north to the south gradually increases. If the daily average temperature drops by more than 10℃ within 24 hours, and the minimum temperature is below 5℃, it is called a cold wave. This cold air forms in the Arctic, Siberia, and the Mongolian Plateau. When the cold air strengthens to a certain extent, it will drive southward. Areas reached by its front often experience frost or ice due to strong northerly winds and severe cooling. If the warm air is active before the cold wave moves southward, it may cause rain or snow, or even freezing rain.
The fifth round of large-scale cold wave this winter is coming
The Central Meteorological Observatory issued a cold wave blue warning at 18:00 on December 15: Affected by the cold air, it is expected that at 20:00 on December 15 By 20:00 on the 18th, most areas in central and eastern my country will have a temperature drop of 6 to 10°C. Among them, southeastern Jilin, eastern Anhui, most of Jiangsu, western Shanghai, most of Zhejiang and other places will have a cooling rate of more than 12°C. The lowest temperature line of 0℃ on the morning of December 18 was located from the northeastern part of Jiangnan to the northern part of the Sichuan Basin. In Inner Mongolia, Northeast China, North China and other places, there will be northerly winds of magnitude 4 to 5 and gusts of magnitude 6 to 8; there will be winds of magnitude 7 to 8 and gusts of magnitude 9 to 10 in the eastern and southern seas of my country. Affected by the strong cold air, the temperature dropped significantly from the night of the 16th to the night of the 17th. Sunny on the 19th, southerly wind level 3 to 4, the lowest temperature in Jiyang District, Laiwu District, Gangcheng District, Shanghe County, and Nanshan District is about -4℃, the urban area and other districts and counties are about -1℃, and the maximum temperature is about 10℃ . It will be sunny on the 20th and 21st, with southerly to northerly winds reaching level 2 to 3, and the maximum temperature will be around 13°C. From the 22nd to the 23rd, it became cloudy, with northerly winds of level 2 to level 3 gradually strengthening to level 3 to level 4 and gusts of level 6 to level 6, and the temperature dropped.
What are the dangers of the cold wave?
Cold wave attacks cold wave and Strong cold air usually brings strong winds and cooling weather. Cold wave and strong winds pose a great threat to coastal areas. For example, during the cold wave from April 21st to 25th, 1969, strong winds hit my country's Bohai Sea, Yellow Sea, Hebei, Shandong, Henan and other provinces. The land wind force was 7~8 and the sea wind was 8~ Level 10. At this time, it was the astronomical tide, and the cold wave outbreak caused a rare storm surge in Bohai Bay and Laizhou Bay in decades. Along the northeastern coast of Shandong, seawater rose by more than 3 meters, destroying more than 50 kilometers of seawalls and intruding seawater for 30 to 40 kilometers. The rain, snow and freezing weather brought by the cold wave are very harmful to transportation. For example, during a cold wave in late November 1987, many station switches under the jurisdiction of railway bureaus such as Harbin, Shenyang, Beijing, and Urumqi froze, the tracks were buried in snow, communication signals failed, and train operations were blocked. After the rain and snow, the roads became icy and slippery, and traffic accidents increased significantly. The cold wave is very harmful to human health. Windy and cooling weather can easily cause colds, bronchitis, coronary heart disease, pulmonary heart disease, stroke, asthma, myocardial infarction, angina, migraine and other diseases, and sometimes aggravate the patient's condition.
What does cold wave mean?
Cold wave is a natural weather phenomenon. It refers to the cold air coming from high latitudes that rapidly intensifies under specific weather conditions and invades mid- and low-latitudes, causing severe cooling, strong winds, rain and snow on a large scale in areas along the way. This kind of cold air that reaches a certain level when it invades south is called a cold wave. Cold wave is the cold air from the polar regions or frigid zones in the winter half of the year, which invades middle and low latitudes on a large scale like a tide. When a cold wave hits, it will cause a sharp drop in temperature, accompanied by strong winds, rain and snow. It has a serious impact on industrial and agricultural production, people's lives and human health.